diff options
Diffstat (limited to 'arch/i386/mach-voyager')
| -rw-r--r-- | arch/i386/mach-voyager/Makefile | 8 | ||||
| -rw-r--r-- | arch/i386/mach-voyager/setup.c | 48 | ||||
| -rw-r--r-- | arch/i386/mach-voyager/voyager_basic.c | 325 | ||||
| -rw-r--r-- | arch/i386/mach-voyager/voyager_cat.c | 1178 | ||||
| -rw-r--r-- | arch/i386/mach-voyager/voyager_smp.c | 1931 | ||||
| -rw-r--r-- | arch/i386/mach-voyager/voyager_thread.c | 167 |
6 files changed, 3657 insertions, 0 deletions
diff --git a/arch/i386/mach-voyager/Makefile b/arch/i386/mach-voyager/Makefile new file mode 100644 index 00000000000..f24d2965131 --- /dev/null +++ b/arch/i386/mach-voyager/Makefile @@ -0,0 +1,8 @@ +# +# Makefile for the linux kernel. +# + +EXTRA_CFLAGS += -I../kernel +obj-y := setup.o voyager_basic.o voyager_thread.o + +obj-$(CONFIG_SMP) += voyager_smp.o voyager_cat.o diff --git a/arch/i386/mach-voyager/setup.c b/arch/i386/mach-voyager/setup.c new file mode 100644 index 00000000000..df123fc487b --- /dev/null +++ b/arch/i386/mach-voyager/setup.c @@ -0,0 +1,48 @@ +/* + * Machine specific setup for generic + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <asm/acpi.h> +#include <asm/arch_hooks.h> + +void __init pre_intr_init_hook(void) +{ + init_ISA_irqs(); +} + +/* + * IRQ2 is cascade interrupt to second interrupt controller + */ +static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL}; + +void __init intr_init_hook(void) +{ +#ifdef CONFIG_SMP + smp_intr_init(); +#endif + + if (!acpi_ioapic) + setup_irq(2, &irq2); +} + +void __init pre_setup_arch_hook(void) +{ + /* Voyagers run their CPUs from independent clocks, so disable + * the TSC code because we can't sync them */ + tsc_disable = 1; +} + +void __init trap_init_hook(void) +{ +} + +static struct irqaction irq0 = { timer_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "timer", NULL, NULL}; + +void __init time_init_hook(void) +{ + setup_irq(0, &irq0); +} diff --git a/arch/i386/mach-voyager/voyager_basic.c b/arch/i386/mach-voyager/voyager_basic.c new file mode 100644 index 00000000000..602aea240e9 --- /dev/null +++ b/arch/i386/mach-voyager/voyager_basic.c @@ -0,0 +1,325 @@ +/* Copyright (C) 1999,2001 + * + * Author: J.E.J.Bottomley@HansenPartnership.com + * + * linux/arch/i386/kernel/voyager.c + * + * This file contains all the voyager specific routines for getting + * initialisation of the architecture to function. For additional + * features see: + * + * voyager_cat.c - Voyager CAT bus interface + * voyager_smp.c - Voyager SMP hal (emulates linux smp.c) + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/sched.h> +#include <linux/ptrace.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/reboot.h> +#include <linux/sysrq.h> +#include <asm/io.h> +#include <asm/voyager.h> +#include <asm/vic.h> +#include <linux/pm.h> +#include <linux/irq.h> +#include <asm/tlbflush.h> +#include <asm/arch_hooks.h> + +/* + * Power off function, if any + */ +void (*pm_power_off)(void); + +int voyager_level = 0; + +struct voyager_SUS *voyager_SUS = NULL; + +#ifdef CONFIG_SMP +static void +voyager_dump(int dummy1, struct pt_regs *dummy2, struct tty_struct *dummy3) +{ + /* get here via a sysrq */ + voyager_smp_dump(); +} + +static struct sysrq_key_op sysrq_voyager_dump_op = { + .handler = voyager_dump, + .help_msg = "Voyager", + .action_msg = "Dump Voyager Status", +}; +#endif + +void +voyager_detect(struct voyager_bios_info *bios) +{ + if(bios->len != 0xff) { + int class = (bios->class_1 << 8) + | (bios->class_2 & 0xff); + + printk("Voyager System detected.\n" + " Class %x, Revision %d.%d\n", + class, bios->major, bios->minor); + if(class == VOYAGER_LEVEL4) + voyager_level = 4; + else if(class < VOYAGER_LEVEL5_AND_ABOVE) + voyager_level = 3; + else + voyager_level = 5; + printk(" Architecture Level %d\n", voyager_level); + if(voyager_level < 4) + printk("\n**WARNING**: Voyager HAL only supports Levels 4 and 5 Architectures at the moment\n\n"); + /* install the power off handler */ + pm_power_off = voyager_power_off; +#ifdef CONFIG_SMP + register_sysrq_key('v', &sysrq_voyager_dump_op); +#endif + } else { + printk("\n\n**WARNING**: No Voyager Subsystem Found\n"); + } +} + +void +voyager_system_interrupt(int cpl, void *dev_id, struct pt_regs *regs) +{ + printk("Voyager: detected system interrupt\n"); +} + +/* Routine to read information from the extended CMOS area */ +__u8 +voyager_extended_cmos_read(__u16 addr) +{ + outb(addr & 0xff, 0x74); + outb((addr >> 8) & 0xff, 0x75); + return inb(0x76); +} + +/* internal definitions for the SUS Click Map of memory */ + +#define CLICK_ENTRIES 16 +#define CLICK_SIZE 4096 /* click to byte conversion for Length */ + +typedef struct ClickMap { + struct Entry { + __u32 Address; + __u32 Length; + } Entry[CLICK_ENTRIES]; +} ClickMap_t; + + +/* This routine is pretty much an awful hack to read the bios clickmap by + * mapping it into page 0. There are usually three regions in the map: + * Base Memory + * Extended Memory + * zero length marker for end of map + * + * Returns are 0 for failure and 1 for success on extracting region. + */ +int __init +voyager_memory_detect(int region, __u32 *start, __u32 *length) +{ + int i; + int retval = 0; + __u8 cmos[4]; + ClickMap_t *map; + unsigned long map_addr; + unsigned long old; + + if(region >= CLICK_ENTRIES) { + printk("Voyager: Illegal ClickMap region %d\n", region); + return 0; + } + + for(i = 0; i < sizeof(cmos); i++) + cmos[i] = voyager_extended_cmos_read(VOYAGER_MEMORY_CLICKMAP + i); + + map_addr = *(unsigned long *)cmos; + + /* steal page 0 for this */ + old = pg0[0]; + pg0[0] = ((map_addr & PAGE_MASK) | _PAGE_RW | _PAGE_PRESENT); + local_flush_tlb(); + /* now clear everything out but page 0 */ + map = (ClickMap_t *)(map_addr & (~PAGE_MASK)); + + /* zero length is the end of the clickmap */ + if(map->Entry[region].Length != 0) { + *length = map->Entry[region].Length * CLICK_SIZE; + *start = map->Entry[region].Address; + retval = 1; + } + + /* replace the mapping */ + pg0[0] = old; + local_flush_tlb(); + return retval; +} + +/* voyager specific handling code for timer interrupts. Used to hand + * off the timer tick to the SMP code, since the VIC doesn't have an + * internal timer (The QIC does, but that's another story). */ +void +voyager_timer_interrupt(struct pt_regs *regs) +{ + if((jiffies & 0x3ff) == 0) { + + /* There seems to be something flaky in either + * hardware or software that is resetting the timer 0 + * count to something much higher than it should be + * This seems to occur in the boot sequence, just + * before root is mounted. Therefore, every 10 + * seconds or so, we sanity check the timer zero count + * and kick it back to where it should be. + * + * FIXME: This is the most awful hack yet seen. I + * should work out exactly what is interfering with + * the timer count settings early in the boot sequence + * and swiftly introduce it to something sharp and + * pointy. */ + __u16 val; + extern spinlock_t i8253_lock; + + spin_lock(&i8253_lock); + + outb_p(0x00, 0x43); + val = inb_p(0x40); + val |= inb(0x40) << 8; + spin_unlock(&i8253_lock); + + if(val > LATCH) { + printk("\nVOYAGER: countdown timer value too high (%d), resetting\n\n", val); + spin_lock(&i8253_lock); + outb(0x34,0x43); + outb_p(LATCH & 0xff , 0x40); /* LSB */ + outb(LATCH >> 8 , 0x40); /* MSB */ + spin_unlock(&i8253_lock); + } + } +#ifdef CONFIG_SMP + smp_vic_timer_interrupt(regs); +#endif +} + +void +voyager_power_off(void) +{ + printk("VOYAGER Power Off\n"); + + if(voyager_level == 5) { + voyager_cat_power_off(); + } else if(voyager_level == 4) { + /* This doesn't apparently work on most L4 machines, + * but the specs say to do this to get automatic power + * off. Unfortunately, if it doesn't power off the + * machine, it ends up doing a cold restart, which + * isn't really intended, so comment out the code */ +#if 0 + int port; + + + /* enable the voyager Configuration Space */ + outb((inb(VOYAGER_MC_SETUP) & 0xf0) | 0x8, + VOYAGER_MC_SETUP); + /* the port for the power off flag is an offset from the + floating base */ + port = (inb(VOYAGER_SSPB_RELOCATION_PORT) << 8) + 0x21; + /* set the power off flag */ + outb(inb(port) | 0x1, port); +#endif + } + /* and wait for it to happen */ + for(;;) { + __asm("cli"); + __asm("hlt"); + } +} + +/* copied from process.c */ +static inline void +kb_wait(void) +{ + int i; + + for (i=0; i<0x10000; i++) + if ((inb_p(0x64) & 0x02) == 0) + break; +} + +void +machine_restart(char *cmd) +{ + printk("Voyager Warm Restart\n"); + kb_wait(); + + if(voyager_level == 5) { + /* write magic values to the RTC to inform system that + * shutdown is beginning */ + outb(0x8f, 0x70); + outb(0x5 , 0x71); + + udelay(50); + outb(0xfe,0x64); /* pull reset low */ + } else if(voyager_level == 4) { + __u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8; + __u8 basebd = inb(VOYAGER_MC_SETUP); + + outb(basebd | 0x08, VOYAGER_MC_SETUP); + outb(0x02, catbase + 0x21); + } + for(;;) { + asm("cli"); + asm("hlt"); + } +} + +EXPORT_SYMBOL(machine_restart); + +void +mca_nmi_hook(void) +{ + __u8 dumpval __attribute__((unused)) = inb(0xf823); + __u8 swnmi __attribute__((unused)) = inb(0xf813); + + /* FIXME: assume dump switch pressed */ + /* check to see if the dump switch was pressed */ + VDEBUG(("VOYAGER: dumpval = 0x%x, swnmi = 0x%x\n", dumpval, swnmi)); + /* clear swnmi */ + outb(0xff, 0xf813); + /* tell SUS to ignore dump */ + if(voyager_level == 5 && voyager_SUS != NULL) { + if(voyager_SUS->SUS_mbox == VOYAGER_DUMP_BUTTON_NMI) { + voyager_SUS->kernel_mbox = VOYAGER_NO_COMMAND; + voyager_SUS->kernel_flags |= VOYAGER_OS_IN_PROGRESS; + udelay(1000); + voyager_SUS->kernel_mbox = VOYAGER_IGNORE_DUMP; + voyager_SUS->kernel_flags &= ~VOYAGER_OS_IN_PROGRESS; + } + } + printk(KERN_ERR "VOYAGER: Dump switch pressed, printing CPU%d tracebacks\n", smp_processor_id()); + show_stack(NULL, NULL); + show_state(); +} + + + +void +machine_halt(void) +{ + /* treat a halt like a power off */ + machine_power_off(); +} + +EXPORT_SYMBOL(machine_halt); + +void machine_power_off(void) +{ + if (pm_power_off) + pm_power_off(); +} + +EXPORT_SYMBOL(machine_power_off); diff --git a/arch/i386/mach-voyager/voyager_cat.c b/arch/i386/mach-voyager/voyager_cat.c new file mode 100644 index 00000000000..23967fe658d --- /dev/null +++ b/arch/i386/mach-voyager/voyager_cat.c @@ -0,0 +1,1178 @@ +/* -*- mode: c; c-basic-offset: 8 -*- */ + +/* Copyright (C) 1999,2001 + * + * Author: J.E.J.Bottomley@HansenPartnership.com + * + * linux/arch/i386/kernel/voyager_cat.c + * + * This file contains all the logic for manipulating the CAT bus + * in a level 5 machine. + * + * The CAT bus is a serial configuration and test bus. Its primary + * uses are to probe the initial configuration of the system and to + * diagnose error conditions when a system interrupt occurs. The low + * level interface is fairly primitive, so most of this file consists + * of bit shift manipulations to send and receive packets on the + * serial bus */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/completion.h> +#include <linux/sched.h> +#include <asm/voyager.h> +#include <asm/vic.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <asm/io.h> + +#ifdef VOYAGER_CAT_DEBUG +#define CDEBUG(x) printk x +#else +#define CDEBUG(x) +#endif + +/* the CAT command port */ +#define CAT_CMD (sspb + 0xe) +/* the CAT data port */ +#define CAT_DATA (sspb + 0xd) + +/* the internal cat functions */ +static void cat_pack(__u8 *msg, __u16 start_bit, __u8 *data, + __u16 num_bits); +static void cat_unpack(__u8 *msg, __u16 start_bit, __u8 *data, + __u16 num_bits); +static void cat_build_header(__u8 *header, const __u16 len, + const __u16 smallest_reg_bits, + const __u16 longest_reg_bits); +static int cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp, + __u8 reg, __u8 op); +static int cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp, + __u8 reg, __u8 *value); +static int cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes, + __u8 pad_bits); +static int cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, + __u8 value); +static int cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, + __u8 *value); +static int cat_subread(voyager_module_t *modp, voyager_asic_t *asicp, + __u16 offset, __u16 len, void *buf); +static int cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp, + __u8 reg, __u8 value); +static int cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp); +static int cat_connect(voyager_module_t *modp, voyager_asic_t *asicp); + +static inline const char * +cat_module_name(int module_id) +{ + switch(module_id) { + case 0x10: + return "Processor Slot 0"; + case 0x11: + return "Processor Slot 1"; + case 0x12: + return "Processor Slot 2"; + case 0x13: + return "Processor Slot 4"; + case 0x14: + return "Memory Slot 0"; + case 0x15: + return "Memory Slot 1"; + case 0x18: + return "Primary Microchannel"; + case 0x19: + return "Secondary Microchannel"; + case 0x1a: + return "Power Supply Interface"; + case 0x1c: + return "Processor Slot 5"; + case 0x1d: + return "Processor Slot 6"; + case 0x1e: + return "Processor Slot 7"; + case 0x1f: + return "Processor Slot 8"; + default: + return "Unknown Module"; + } +} + +static int sspb = 0; /* stores the super port location */ +int voyager_8slot = 0; /* set to true if a 51xx monster */ + +voyager_module_t *voyager_cat_list; + +/* the I/O port assignments for the VIC and QIC */ +static struct resource vic_res = { + "Voyager Interrupt Controller", 0xFC00, 0xFC6F }; +static struct resource qic_res = { + "Quad Interrupt Controller", 0xFC70, 0xFCFF }; + +/* This function is used to pack a data bit stream inside a message. + * It writes num_bits of the data buffer in msg starting at start_bit. + * Note: This function assumes that any unused bit in the data stream + * is set to zero so that the ors will work correctly */ +#define BITS_PER_BYTE 8 +static void +cat_pack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits) +{ + /* compute initial shift needed */ + const __u16 offset = start_bit % BITS_PER_BYTE; + __u16 len = num_bits / BITS_PER_BYTE; + __u16 byte = start_bit / BITS_PER_BYTE; + __u16 residue = (num_bits % BITS_PER_BYTE) + offset; + int i; + + /* adjust if we have more than a byte of residue */ + if(residue >= BITS_PER_BYTE) { + residue -= BITS_PER_BYTE; + len++; + } + + /* clear out the bits. We assume here that if len==0 then + * residue >= offset. This is always true for the catbus + * operations */ + msg[byte] &= 0xff << (BITS_PER_BYTE - offset); + msg[byte++] |= data[0] >> offset; + if(len == 0) + return; + for(i = 1; i < len; i++) + msg[byte++] = (data[i-1] << (BITS_PER_BYTE - offset)) + | (data[i] >> offset); + if(residue != 0) { + __u8 mask = 0xff >> residue; + __u8 last_byte = data[i-1] << (BITS_PER_BYTE - offset) + | (data[i] >> offset); + + last_byte &= ~mask; + msg[byte] &= mask; + msg[byte] |= last_byte; + } + return; +} +/* unpack the data again (same arguments as cat_pack()). data buffer + * must be zero populated. + * + * Function: given a message string move to start_bit and copy num_bits into + * data (starting at bit 0 in data). + */ +static void +cat_unpack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits) +{ + /* compute initial shift needed */ + const __u16 offset = start_bit % BITS_PER_BYTE; + __u16 len = num_bits / BITS_PER_BYTE; + const __u8 last_bits = num_bits % BITS_PER_BYTE; + __u16 byte = start_bit / BITS_PER_BYTE; + int i; + + if(last_bits != 0) + len++; + + /* special case: want < 8 bits from msg and we can get it from + * a single byte of the msg */ + if(len == 0 && BITS_PER_BYTE - offset >= num_bits) { + data[0] = msg[byte] << offset; + data[0] &= 0xff >> (BITS_PER_BYTE - num_bits); + return; + } + for(i = 0; i < len; i++) { + /* this annoying if has to be done just in case a read of + * msg one beyond the array causes a panic */ + if(offset != 0) { + data[i] = msg[byte++] << offset; + data[i] |= msg[byte] >> (BITS_PER_BYTE - offset); + } + else { + data[i] = msg[byte++]; + } + } + /* do we need to truncate the final byte */ + if(last_bits != 0) { + data[i-1] &= 0xff << (BITS_PER_BYTE - last_bits); + } + return; +} + +static void +cat_build_header(__u8 *header, const __u16 len, const __u16 smallest_reg_bits, + const __u16 longest_reg_bits) +{ + int i; + __u16 start_bit = (smallest_reg_bits - 1) % BITS_PER_BYTE; + __u8 *last_byte = &header[len - 1]; + + if(start_bit == 0) + start_bit = 1; /* must have at least one bit in the hdr */ + + for(i=0; i < len; i++) + header[i] = 0; + + for(i = start_bit; i > 0; i--) + *last_byte = ((*last_byte) << 1) + 1; + +} + +static int +cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, __u8 op) +{ + __u8 parity, inst, inst_buf[4] = { 0 }; + __u8 iseq[VOYAGER_MAX_SCAN_PATH], hseq[VOYAGER_MAX_REG_SIZE]; + __u16 ibytes, hbytes, padbits; + int i; + + /* + * Parity is the parity of the register number + 1 (READ_REGISTER + * and WRITE_REGISTER always add '1' to the number of bits == 1) + */ + parity = (__u8)(1 + (reg & 0x01) + + ((__u8)(reg & 0x02) >> 1) + + ((__u8)(reg & 0x04) >> 2) + + ((__u8)(reg & 0x08) >> 3)) % 2; + + inst = ((parity << 7) | (reg << 2) | op); + + outb(VOYAGER_CAT_IRCYC, CAT_CMD); + if(!modp->scan_path_connected) { + if(asicp->asic_id != VOYAGER_CAT_ID) { + printk("**WARNING***: cat_sendinst has disconnected scan path not to CAT asic\n"); + return 1; + } + outb(VOYAGER_CAT_HEADER, CAT_DATA); + outb(inst, CAT_DATA); + if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) { + CDEBUG(("VOYAGER CAT: cat_sendinst failed to get CAT_HEADER\n")); + return 1; + } + return 0; + } + ibytes = modp->inst_bits / BITS_PER_BYTE; + if((padbits = modp->inst_bits % BITS_PER_BYTE) != 0) { + padbits = BITS_PER_BYTE - padbits; + ibytes++; + } + hbytes = modp->largest_reg / BITS_PER_BYTE; + if(modp->largest_reg % BITS_PER_BYTE) + hbytes++; + CDEBUG(("cat_sendinst: ibytes=%d, hbytes=%d\n", ibytes, hbytes)); + /* initialise the instruction sequence to 0xff */ + for(i=0; i < ibytes + hbytes; i++) + iseq[i] = 0xff; + cat_build_header(hseq, hbytes, modp->smallest_reg, modp->largest_reg); + cat_pack(iseq, modp->inst_bits, hseq, hbytes * BITS_PER_BYTE); + inst_buf[0] = inst; + inst_buf[1] = 0xFF >> (modp->largest_reg % BITS_PER_BYTE); + cat_pack(iseq, asicp->bit_location, inst_buf, asicp->ireg_length); +#ifdef VOYAGER_CAT_DEBUG + printk("ins = 0x%x, iseq: ", inst); + for(i=0; i< ibytes + hbytes; i++) + printk("0x%x ", iseq[i]); + printk("\n"); +#endif + if(cat_shiftout(iseq, ibytes, hbytes, padbits)) { + CDEBUG(("VOYAGER CAT: cat_sendinst: cat_shiftout failed\n")); + return 1; + } + CDEBUG(("CAT SHIFTOUT DONE\n")); + return 0; +} + +static int +cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, + __u8 *value) +{ + if(!modp->scan_path_connected) { + if(asicp->asic_id != VOYAGER_CAT_ID) { + CDEBUG(("VOYAGER CAT: ERROR: cat_getdata to CAT asic with scan path connected\n")); + return 1; + } + if(reg > VOYAGER_SUBADDRHI) + outb(VOYAGER_CAT_RUN, CAT_CMD); + outb(VOYAGER_CAT_DRCYC, CAT_CMD); + outb(VOYAGER_CAT_HEADER, CAT_DATA); + *value = inb(CAT_DATA); + outb(0xAA, CAT_DATA); + if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) { + CDEBUG(("cat_getdata: failed to get VOYAGER_CAT_HEADER\n")); + return 1; + } + return 0; + } + else { + __u16 sbits = modp->num_asics -1 + asicp->ireg_length; + __u16 sbytes = sbits / BITS_PER_BYTE; + __u16 tbytes; + __u8 string[VOYAGER_MAX_SCAN_PATH], trailer[VOYAGER_MAX_REG_SIZE]; + __u8 padbits; + int i; + + outb(VOYAGER_CAT_DRCYC, CAT_CMD); + + if((padbits = sbits % BITS_PER_BYTE) != 0) { + padbits = BITS_PER_BYTE - padbits; + sbytes++; + } + tbytes = asicp->ireg_length / BITS_PER_BYTE; + if(asicp->ireg_length % BITS_PER_BYTE) + tbytes++; + CDEBUG(("cat_getdata: tbytes = %d, sbytes = %d, padbits = %d\n", + tbytes, sbytes, padbits)); + cat_build_header(trailer, tbytes, 1, asicp->ireg_length); + + + for(i = tbytes - 1; i >= 0; i--) { + outb(trailer[i], CAT_DATA); + string[sbytes + i] = inb(CAT_DATA); + } + + for(i = sbytes - 1; i >= 0; i--) { + outb(0xaa, CAT_DATA); + string[i] = inb(CAT_DATA); + } + *value = 0; + cat_unpack(string, padbits + (tbytes * BITS_PER_BYTE) + asicp->asic_location, value, asicp->ireg_length); +#ifdef VOYAGER_CAT_DEBUG + printk("value=0x%x, string: ", *value); + for(i=0; i< tbytes+sbytes; i++) + printk("0x%x ", string[i]); + printk("\n"); +#endif + + /* sanity check the rest of the return */ + for(i=0; i < tbytes; i++) { + __u8 input = 0; + + cat_unpack(string, padbits + (i * BITS_PER_BYTE), &input, BITS_PER_BYTE); + if(trailer[i] != input) { + CDEBUG(("cat_getdata: failed to sanity check rest of ret(%d) 0x%x != 0x%x\n", i, input, trailer[i])); + return 1; + } + } + CDEBUG(("cat_getdata DONE\n")); + return 0; + } +} + +static int +cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes, __u8 pad_bits) +{ + int i; + + for(i = data_bytes + header_bytes - 1; i >= header_bytes; i--) + outb(data[i], CAT_DATA); + + for(i = header_bytes - 1; i >= 0; i--) { + __u8 header = 0; + __u8 input; + + outb(data[i], CAT_DATA); + input = inb(CAT_DATA); + CDEBUG(("cat_shiftout: returned 0x%x\n", input)); + cat_unpack(data, ((data_bytes + i) * BITS_PER_BYTE) - pad_bits, + &header, BITS_PER_BYTE); + if(input != header) { + CDEBUG(("VOYAGER CAT: cat_shiftout failed to return header 0x%x != 0x%x\n", input, header)); + return 1; + } + } + return 0; +} + +static int +cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp, + __u8 reg, __u8 value) +{ + outb(VOYAGER_CAT_DRCYC, CAT_CMD); + if(!modp->scan_path_connected) { + if(asicp->asic_id != VOYAGER_CAT_ID) { + CDEBUG(("VOYAGER CAT: ERROR: scan path disconnected when asic != CAT\n")); + return 1; + } + outb(VOYAGER_CAT_HEADER, CAT_DATA); + outb(value, CAT_DATA); + if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) { + CDEBUG(("cat_senddata: failed to get correct header response to sent data\n")); + return 1; + } + if(reg > VOYAGER_SUBADDRHI) { + outb(VOYAGER_CAT_RUN, CAT_CMD); + outb(VOYAGER_CAT_END, CAT_CMD); + outb(VOYAGER_CAT_RUN, CAT_CMD); + } + + return 0; + } + else { + __u16 hbytes = asicp->ireg_length / BITS_PER_BYTE; + __u16 dbytes = (modp->num_asics - 1 + asicp->ireg_length)/BITS_PER_BYTE; + __u8 padbits, dseq[VOYAGER_MAX_SCAN_PATH], + hseq[VOYAGER_MAX_REG_SIZE]; + int i; + + if((padbits = (modp->num_asics - 1 + + asicp->ireg_length) % BITS_PER_BYTE) != 0) { + padbits = BITS_PER_BYTE - padbits; + dbytes++; + } + if(asicp->ireg_length % BITS_PER_BYTE) + hbytes++; + + cat_build_header(hseq, hbytes, 1, asicp->ireg_length); + + for(i = 0; i < dbytes + hbytes; i++) + dseq[i] = 0xff; + CDEBUG(("cat_senddata: dbytes=%d, hbytes=%d, padbits=%d\n", + dbytes, hbytes, padbits)); + cat_pack(dseq, modp->num_asics - 1 + asicp->ireg_length, + hseq, hbytes * BITS_PER_BYTE); + cat_pack(dseq, asicp->asic_location, &value, + asicp->ireg_length); +#ifdef VOYAGER_CAT_DEBUG + printk("dseq "); + for(i=0; i<hbytes+dbytes; i++) { + printk("0x%x ", dseq[i]); + } + printk("\n"); +#endif + return cat_shiftout(dseq, dbytes, hbytes, padbits); + } +} + +static int +cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, + __u8 value) +{ + if(cat_sendinst(modp, asicp, reg, VOYAGER_WRITE_CONFIG)) + return 1; + return cat_senddata(modp, asicp, reg, value); +} + +static int +cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, + __u8 *value) +{ + if(cat_sendinst(modp, asicp, reg, VOYAGER_READ_CONFIG)) + return 1; + return cat_getdata(modp, asicp, reg, value); +} + +static int +cat_subaddrsetup(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset, + __u16 len) +{ + __u8 val; + + if(len > 1) { + /* set auto increment */ + __u8 newval; + + if(cat_read(modp, asicp, VOYAGER_AUTO_INC_REG, &val)) { + CDEBUG(("cat_subaddrsetup: read of VOYAGER_AUTO_INC_REG failed\n")); + return 1; + } + CDEBUG(("cat_subaddrsetup: VOYAGER_AUTO_INC_REG = 0x%x\n", val)); + newval = val | VOYAGER_AUTO_INC; + if(newval != val) { + if(cat_write(modp, asicp, VOYAGER_AUTO_INC_REG, val)) { + CDEBUG(("cat_subaddrsetup: write to VOYAGER_AUTO_INC_REG failed\n")); + return 1; + } + } + } + if(cat_write(modp, asicp, VOYAGER_SUBADDRLO, (__u8)(offset &0xff))) { + CDEBUG(("cat_subaddrsetup: write to SUBADDRLO failed\n")); + return 1; + } + if(asicp->subaddr > VOYAGER_SUBADDR_LO) { + if(cat_write(modp, asicp, VOYAGER_SUBADDRHI, (__u8)(offset >> 8))) { + CDEBUG(("cat_subaddrsetup: write to SUBADDRHI failed\n")); + return 1; + } + cat_read(modp, asicp, VOYAGER_SUBADDRHI, &val); + CDEBUG(("cat_subaddrsetup: offset = %d, hi = %d\n", offset, val)); + } + cat_read(modp, asicp, VOYAGER_SUBADDRLO, &val); + CDEBUG(("cat_subaddrsetup: offset = %d, lo = %d\n", offset, val)); + return 0; +} + +static int +cat_subwrite(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset, + __u16 len, void *buf) +{ + int i, retval; + + /* FIXME: need special actions for VOYAGER_CAT_ID here */ + if(asicp->asic_id == VOYAGER_CAT_ID) { + CDEBUG(("cat_subwrite: ATTEMPT TO WRITE TO CAT ASIC\n")); + /* FIXME -- This is supposed to be handled better + * There is a problem writing to the cat asic in the + * PSI. The 30us delay seems to work, though */ + udelay(30); + } + + if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) { + printk("cat_subwrite: cat_subaddrsetup FAILED\n"); + return retval; + } + + if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_WRITE_CONFIG)) { + printk("cat_subwrite: cat_sendinst FAILED\n"); + return 1; + } + for(i = 0; i < len; i++) { + if(cat_senddata(modp, asicp, 0xFF, ((__u8 *)buf)[i])) { + printk("cat_subwrite: cat_sendata element at %d FAILED\n", i); + return 1; + } + } + return 0; +} +static int +cat_subread(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset, + __u16 len, void *buf) +{ + int i, retval; + + if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) { + CDEBUG(("cat_subread: cat_subaddrsetup FAILED\n")); + return retval; + } + + if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_READ_CONFIG)) { + CDEBUG(("cat_subread: cat_sendinst failed\n")); + return 1; + } + for(i = 0; i < len; i++) { + if(cat_getdata(modp, asicp, 0xFF, + &((__u8 *)buf)[i])) { + CDEBUG(("cat_subread: cat_getdata element %d failed\n", i)); + return 1; + } + } + return 0; +} + + +/* buffer for storing EPROM data read in during initialisation */ +static __initdata __u8 eprom_buf[0xFFFF]; +static voyager_module_t *voyager_initial_module; + +/* Initialise the cat bus components. We assume this is called by the + * boot cpu *after* all memory initialisation has been done (so we can + * use kmalloc) but before smp initialisation, so we can probe the SMP + * configuration and pick up necessary information. */ +void +voyager_cat_init(void) +{ + voyager_module_t **modpp = &voyager_initial_module; + voyager_asic_t **asicpp; + voyager_asic_t *qabc_asic = NULL; + int i, j; + unsigned long qic_addr = 0; + __u8 qabc_data[0x20]; + __u8 num_submodules, val; + voyager_eprom_hdr_t *eprom_hdr = (voyager_eprom_hdr_t *)&eprom_buf[0]; + + __u8 cmos[4]; + unsigned long addr; + + /* initiallise the SUS mailbox */ + for(i=0; i<sizeof(cmos); i++) + cmos[i] = voyager_extended_cmos_read(VOYAGER_DUMP_LOCATION + i); + addr = *(unsigned long *)cmos; + if((addr & 0xff000000) != 0xff000000) { + printk(KERN_ERR "Voyager failed to get SUS mailbox (addr = 0x%lx\n", addr); + } else { + static struct resource res; + + res.name = "voyager SUS"; + res.start = addr; + res.end = addr+0x3ff; + + request_resource(&iomem_resource, &res); + voyager_SUS = (struct voyager_SUS *) + ioremap(addr, 0x400); + printk(KERN_NOTICE "Voyager SUS mailbox version 0x%x\n", + voyager_SUS->SUS_version); + voyager_SUS->kernel_version = VOYAGER_MAILBOX_VERSION; + voyager_SUS->kernel_flags = VOYAGER_OS_HAS_SYSINT; + } + + /* clear the processor counts */ + voyager_extended_vic_processors = 0; + voyager_quad_processors = 0; + + + + printk("VOYAGER: beginning CAT bus probe\n"); + /* set up the SuperSet Port Block which tells us where the + * CAT communication port is */ + sspb = inb(VOYAGER_SSPB_RELOCATION_PORT) * 0x100; + VDEBUG(("VOYAGER DEBUG: sspb = 0x%x\n", sspb)); + + /* now find out if were 8 slot or normal */ + if((inb(VIC_PROC_WHO_AM_I) & EIGHT_SLOT_IDENTIFIER) + == EIGHT_SLOT_IDENTIFIER) { + voyager_8slot = 1; + printk(KERN_NOTICE "Voyager: Eight slot 51xx configuration detected\n"); + } + + for(i = VOYAGER_MIN_MODULE; + i <= VOYAGER_MAX_MODULE; i++) { + __u8 input; + int asic; + __u16 eprom_size; + __u16 sp_offset; + + outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT); + outb(i, VOYAGER_CAT_CONFIG_PORT); + + /* check the presence of the module */ + outb(VOYAGER_CAT_RUN, CAT_CMD); + outb(VOYAGER_CAT_IRCYC, CAT_CMD); + outb(VOYAGER_CAT_HEADER, CAT_DATA); + /* stream series of alternating 1's and 0's to stimulate + * response */ + outb(0xAA, CAT_DATA); + input = inb(CAT_DATA); + outb(VOYAGER_CAT_END, CAT_CMD); + if(input != VOYAGER_CAT_HEADER) { + continue; + } + CDEBUG(("VOYAGER DEBUG: found module id 0x%x, %s\n", i, + cat_module_name(i))); + *modpp = kmalloc(sizeof(voyager_module_t), GFP_KERNEL); /*&voyager_module_storage[cat_count++];*/ + if(*modpp == NULL) { + printk("**WARNING** kmalloc failure in cat_init\n"); + continue; + } + memset(*modpp, 0, sizeof(voyager_module_t)); + /* need temporary asic for cat_subread. It will be + * filled in correctly later */ + (*modpp)->asic = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count];*/ + if((*modpp)->asic == NULL) { + printk("**WARNING** kmalloc failure in cat_init\n"); + continue; + } + memset((*modpp)->asic, 0, sizeof(voyager_asic_t)); + (*modpp)->asic->asic_id = VOYAGER_CAT_ID; + (*modpp)->asic->subaddr = VOYAGER_SUBADDR_HI; + (*modpp)->module_addr = i; + (*modpp)->scan_path_connected = 0; + if(i == VOYAGER_PSI) { + /* Exception leg for modules with no EEPROM */ + printk("Module \"%s\"\n", cat_module_name(i)); + continue; + } + + CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET)); + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_disconnect(*modpp, (*modpp)->asic); + if(cat_subread(*modpp, (*modpp)->asic, + VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size), + &eprom_size)) { + printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i); + outb(VOYAGER_CAT_END, CAT_CMD); + continue; + } + if(eprom_size > sizeof(eprom_buf)) { + printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x. Need %d\n", i, eprom_size); + outb(VOYAGER_CAT_END, CAT_CMD); + continue; + } + outb(VOYAGER_CAT_END, CAT_CMD); + outb(VOYAGER_CAT_RUN, CAT_CMD); + CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size)); + if(cat_subread(*modpp, (*modpp)->asic, 0, + eprom_size, eprom_buf)) { + outb(VOYAGER_CAT_END, CAT_CMD); + continue; + } + outb(VOYAGER_CAT_END, CAT_CMD); + printk("Module \"%s\", version 0x%x, tracer 0x%x, asics %d\n", + cat_module_name(i), eprom_hdr->version_id, + *((__u32 *)eprom_hdr->tracer), eprom_hdr->num_asics); + (*modpp)->ee_size = eprom_hdr->ee_size; + (*modpp)->num_asics = eprom_hdr->num_asics; + asicpp = &((*modpp)->asic); + sp_offset = eprom_hdr->scan_path_offset; + /* All we really care about are the Quad cards. We + * identify them because they are in a processor slot + * and have only four asics */ + if((i < 0x10 || (i>=0x14 && i < 0x1c) || i>0x1f)) { + modpp = &((*modpp)->next); + continue; + } + /* Now we know it's in a processor slot, does it have + * a quad baseboard submodule */ + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODPRESENT, + &num_submodules); + /* lowest two bits, active low */ + num_submodules = ~(0xfc | num_submodules); + CDEBUG(("VOYAGER CAT: %d submodules present\n", num_submodules)); + if(num_submodules == 0) { + /* fill in the dyadic extended processors */ + __u8 cpu = i & 0x07; + + printk("Module \"%s\": Dyadic Processor Card\n", + cat_module_name(i)); + voyager_extended_vic_processors |= (1<<cpu); + cpu += 4; + voyager_extended_vic_processors |= (1<<cpu); + outb(VOYAGER_CAT_END, CAT_CMD); + continue; + } + + /* now we want to read the asics on the first submodule, + * which should be the quad base board */ + + cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, &val); + CDEBUG(("cat_init: SUBMODSELECT value = 0x%x\n", val)); + val = (val & 0x7c) | VOYAGER_QUAD_BASEBOARD; + cat_write(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, val); + + outb(VOYAGER_CAT_END, CAT_CMD); + + + CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET)); + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_disconnect(*modpp, (*modpp)->asic); + if(cat_subread(*modpp, (*modpp)->asic, + VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size), + &eprom_size)) { + printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i); + outb(VOYAGER_CAT_END, CAT_CMD); + continue; + } + if(eprom_size > sizeof(eprom_buf)) { + printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x. Need %d\n", i, eprom_size); + outb(VOYAGER_CAT_END, CAT_CMD); + continue; + } + outb(VOYAGER_CAT_END, CAT_CMD); + outb(VOYAGER_CAT_RUN, CAT_CMD); + CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size)); + if(cat_subread(*modpp, (*modpp)->asic, 0, + eprom_size, eprom_buf)) { + outb(VOYAGER_CAT_END, CAT_CMD); + continue; + } + outb(VOYAGER_CAT_END, CAT_CMD); + /* Now do everything for the QBB submodule 1 */ + (*modpp)->ee_size = eprom_hdr->ee_size; + (*modpp)->num_asics = eprom_hdr->num_asics; + asicpp = &((*modpp)->asic); + sp_offset = eprom_hdr->scan_path_offset; + /* get rid of the dummy CAT asic and read the real one */ + kfree((*modpp)->asic); + for(asic=0; asic < (*modpp)->num_asics; asic++) { + int j; + voyager_asic_t *asicp = *asicpp + = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count++];*/ + voyager_sp_table_t *sp_table; + voyager_at_t *asic_table; + voyager_jtt_t *jtag_table; + + if(asicp == NULL) { + printk("**WARNING** kmalloc failure in cat_init\n"); + continue; + } + memset(asicp, 0, sizeof(voyager_asic_t)); + asicpp = &(asicp->next); + asicp->asic_location = asic; + sp_table = (voyager_sp_table_t *)(eprom_buf + sp_offset); + asicp->asic_id = sp_table->asic_id; + asic_table = (voyager_at_t *)(eprom_buf + sp_table->asic_data_offset); + for(j=0; j<4; j++) + asicp->jtag_id[j] = asic_table->jtag_id[j]; + jtag_table = (voyager_jtt_t *)(eprom_buf + asic_table->jtag_offset); + asicp->ireg_length = jtag_table->ireg_len; + asicp->bit_location = (*modpp)->inst_bits; + (*modpp)->inst_bits += asicp->ireg_length; + if(asicp->ireg_length > (*modpp)->largest_reg) + (*modpp)->largest_reg = asicp->ireg_length; + if (asicp->ireg_length < (*modpp)->smallest_reg || + (*modpp)->smallest_reg == 0) + (*modpp)->smallest_reg = asicp->ireg_length; + CDEBUG(("asic 0x%x, ireg_length=%d, bit_location=%d\n", + asicp->asic_id, asicp->ireg_length, + asicp->bit_location)); + if(asicp->asic_id == VOYAGER_QUAD_QABC) { + CDEBUG(("VOYAGER CAT: QABC ASIC found\n")); + qabc_asic = asicp; + } + sp_offset += sizeof(voyager_sp_table_t); + } + CDEBUG(("Module inst_bits = %d, largest_reg = %d, smallest_reg=%d\n", + (*modpp)->inst_bits, (*modpp)->largest_reg, + (*modpp)->smallest_reg)); + /* OK, now we have the QUAD ASICs set up, use them. + * we need to: + * + * 1. Find the Memory area for the Quad CPIs. + * 2. Find the Extended VIC processor + * 3. Configure a second extended VIC processor (This + * cannot be done for the 51xx. + * */ + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_connect(*modpp, (*modpp)->asic); + CDEBUG(("CAT CONNECTED!!\n")); + cat_subread(*modpp, qabc_asic, 0, sizeof(qabc_data), qabc_data); + qic_addr = qabc_data[5] << 8; + qic_addr = (qic_addr | qabc_data[6]) << 8; + qic_addr = (qic_addr | qabc_data[7]) << 8; + printk("Module \"%s\": Quad Processor Card; CPI 0x%lx, SET=0x%x\n", + cat_module_name(i), qic_addr, qabc_data[8]); +#if 0 /* plumbing fails---FIXME */ + if((qabc_data[8] & 0xf0) == 0) { + /* FIXME: 32 way 8 CPU slot monster cannot be + * plumbed this way---need to check for it */ + + printk("Plumbing second Extended Quad Processor\n"); + /* second VIC line hardwired to Quad CPU 1 */ + qabc_data[8] |= 0x20; + cat_subwrite(*modpp, qabc_asic, 8, 1, &qabc_data[8]); +#ifdef VOYAGER_CAT_DEBUG + /* verify plumbing */ + cat_subread(*modpp, qabc_asic, 8, 1, &qabc_data[8]); + if((qabc_data[8] & 0xf0) == 0) { + CDEBUG(("PLUMBING FAILED: 0x%x\n", qabc_data[8])); + } +#endif + } +#endif + + { + struct resource *res = kmalloc(sizeof(struct resource),GFP_KERNEL); + memset(res, 0, sizeof(struct resource)); + res->name = kmalloc(128, GFP_KERNEL); + sprintf((char *)res->name, "Voyager %s Quad CPI", cat_module_name(i)); + res->start = qic_addr; + res->end = qic_addr + 0x3ff; + request_resource(&iomem_resource, res); + } + + qic_addr = (unsigned long)ioremap(qic_addr, 0x400); + + for(j = 0; j < 4; j++) { + __u8 cpu; + + if(voyager_8slot) { + /* 8 slot has a different mapping, + * each slot has only one vic line, so + * 1 cpu in each slot must be < 8 */ + cpu = (i & 0x07) + j*8; + } else { + cpu = (i & 0x03) + j*4; + } + if( (qabc_data[8] & (1<<j))) { + voyager_extended_vic_processors |= (1<<cpu); + } + if(qabc_data[8] & (1<<(j+4)) ) { + /* Second SET register plumbed: Quad + * card has two VIC connected CPUs. + * Secondary cannot be booted as a VIC + * CPU */ + voyager_extended_vic_processors |= (1<<cpu); + voyager_allowed_boot_processors &= (~(1<<cpu)); + } + + voyager_quad_processors |= (1<<cpu); + voyager_quad_cpi_addr[cpu] = (struct voyager_qic_cpi *) + (qic_addr+(j<<8)); + CDEBUG(("CPU%d: CPI address 0x%lx\n", cpu, + (unsigned long)voyager_quad_cpi_addr[cpu])); + } + outb(VOYAGER_CAT_END, CAT_CMD); + + + + *asicpp = NULL; + modpp = &((*modpp)->next); + } + *modpp = NULL; + printk("CAT Bus Initialisation finished: extended procs 0x%x, quad procs 0x%x, allowed vic boot = 0x%x\n", voyager_extended_vic_processors, voyager_quad_processors, voyager_allowed_boot_processors); + request_resource(&ioport_resource, &vic_res); + if(voyager_quad_processors) + request_resource(&ioport_resource, &qic_res); + /* set up the front power switch */ +} + +int +voyager_cat_readb(__u8 module, __u8 asic, int reg) +{ + return 0; +} + +static int +cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp) +{ + __u8 val; + int err = 0; + + if(!modp->scan_path_connected) + return 0; + if(asicp->asic_id != VOYAGER_CAT_ID) { + CDEBUG(("cat_disconnect: ASIC is not CAT\n")); + return 1; + } + err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val); + if(err) { + CDEBUG(("cat_disconnect: failed to read SCANPATH\n")); + return err; + } + val &= VOYAGER_DISCONNECT_ASIC; + err = cat_write(modp, asicp, VOYAGER_SCANPATH, val); + if(err) { + CDEBUG(("cat_disconnect: failed to write SCANPATH\n")); + return err; + } + outb(VOYAGER_CAT_END, CAT_CMD); + outb(VOYAGER_CAT_RUN, CAT_CMD); + modp->scan_path_connected = 0; + + return 0; +} + +static int +cat_connect(voyager_module_t *modp, voyager_asic_t *asicp) +{ + __u8 val; + int err = 0; + + if(modp->scan_path_connected) + return 0; + if(asicp->asic_id != VOYAGER_CAT_ID) { + CDEBUG(("cat_connect: ASIC is not CAT\n")); + return 1; + } + + err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val); + if(err) { + CDEBUG(("cat_connect: failed to read SCANPATH\n")); + return err; + } + val |= VOYAGER_CONNECT_ASIC; + err = cat_write(modp, asicp, VOYAGER_SCANPATH, val); + if(err) { + CDEBUG(("cat_connect: failed to write SCANPATH\n")); + return err; + } + outb(VOYAGER_CAT_END, CAT_CMD); + outb(VOYAGER_CAT_RUN, CAT_CMD); + modp->scan_path_connected = 1; + + return 0; +} + +void +voyager_cat_power_off(void) +{ + /* Power the machine off by writing to the PSI over the CAT + * bus */ + __u8 data; + voyager_module_t psi = { 0 }; + voyager_asic_t psi_asic = { 0 }; + + psi.asic = &psi_asic; + psi.asic->asic_id = VOYAGER_CAT_ID; + psi.asic->subaddr = VOYAGER_SUBADDR_HI; + psi.module_addr = VOYAGER_PSI; + psi.scan_path_connected = 0; + + outb(VOYAGER_CAT_END, CAT_CMD); + /* Connect the PSI to the CAT Bus */ + outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT); + outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT); + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_disconnect(&psi, &psi_asic); + /* Read the status */ + cat_subread(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data); + outb(VOYAGER_CAT_END, CAT_CMD); + CDEBUG(("PSI STATUS 0x%x\n", data)); + /* These two writes are power off prep and perform */ + data = PSI_CLEAR; + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data); + outb(VOYAGER_CAT_END, CAT_CMD); + data = PSI_POWER_DOWN; + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data); + outb(VOYAGER_CAT_END, CAT_CMD); +} + +struct voyager_status voyager_status = { 0 }; + +void +voyager_cat_psi(__u8 cmd, __u16 reg, __u8 *data) +{ + voyager_module_t psi = { 0 }; + voyager_asic_t psi_asic = { 0 }; + + psi.asic = &psi_asic; + psi.asic->asic_id = VOYAGER_CAT_ID; + psi.asic->subaddr = VOYAGER_SUBADDR_HI; + psi.module_addr = VOYAGER_PSI; + psi.scan_path_connected = 0; + + outb(VOYAGER_CAT_END, CAT_CMD); + /* Connect the PSI to the CAT Bus */ + outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT); + outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT); + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_disconnect(&psi, &psi_asic); + switch(cmd) { + case VOYAGER_PSI_READ: + cat_read(&psi, &psi_asic, reg, data); + break; + case VOYAGER_PSI_WRITE: + cat_write(&psi, &psi_asic, reg, *data); + break; + case VOYAGER_PSI_SUBREAD: + cat_subread(&psi, &psi_asic, reg, 1, data); + break; + case VOYAGER_PSI_SUBWRITE: + cat_subwrite(&psi, &psi_asic, reg, 1, data); + break; + default: + printk(KERN_ERR "Voyager PSI, unrecognised command %d\n", cmd); + break; + } + outb(VOYAGER_CAT_END, CAT_CMD); +} + +void +voyager_cat_do_common_interrupt(void) +{ + /* This is caused either by a memory parity error or something + * in the PSI */ + __u8 data; + voyager_module_t psi = { 0 }; + voyager_asic_t psi_asic = { 0 }; + struct voyager_psi psi_reg; + int i; + re_read: + psi.asic = &psi_asic; + psi.asic->asic_id = VOYAGER_CAT_ID; + psi.asic->subaddr = VOYAGER_SUBADDR_HI; + psi.module_addr = VOYAGER_PSI; + psi.scan_path_connected = 0; + + outb(VOYAGER_CAT_END, CAT_CMD); + /* Connect the PSI to the CAT Bus */ + outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT); + outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT); + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_disconnect(&psi, &psi_asic); + /* Read the status. NOTE: Need to read *all* the PSI regs here + * otherwise the cmn int will be reasserted */ + for(i = 0; i < sizeof(psi_reg.regs); i++) { + cat_read(&psi, &psi_asic, i, &((__u8 *)&psi_reg.regs)[i]); + } + outb(VOYAGER_CAT_END, CAT_CMD); + if((psi_reg.regs.checkbit & 0x02) == 0) { + psi_reg.regs.checkbit |= 0x02; + cat_write(&psi, &psi_asic, 5, psi_reg.regs.checkbit); + printk("VOYAGER RE-READ PSI\n"); + goto re_read; + } + outb(VOYAGER_CAT_RUN, CAT_CMD); + for(i = 0; i < sizeof(psi_reg.subregs); i++) { + /* This looks strange, but the PSI doesn't do auto increment + * correctly */ + cat_subread(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG + i, + 1, &((__u8 *)&psi_reg.subregs)[i]); + } + outb(VOYAGER_CAT_END, CAT_CMD); +#ifdef VOYAGER_CAT_DEBUG + printk("VOYAGER PSI: "); + for(i=0; i<sizeof(psi_reg.regs); i++) + printk("%02x ", ((__u8 *)&psi_reg.regs)[i]); + printk("\n "); + for(i=0; i<sizeof(psi_reg.subregs); i++) + printk("%02x ", ((__u8 *)&psi_reg.subregs)[i]); + printk("\n"); +#endif + if(psi_reg.regs.intstatus & PSI_MON) { + /* switch off or power fail */ + + if(psi_reg.subregs.supply & PSI_SWITCH_OFF) { + if(voyager_status.switch_off) { + printk(KERN_ERR "Voyager front panel switch turned off again---Immediate power off!\n"); + voyager_cat_power_off(); + /* not reached */ + } else { + printk(KERN_ERR "Voyager front panel switch turned off\n"); + voyager_status.switch_off = 1; + voyager_status.request_from_kernel = 1; + up(&kvoyagerd_sem); + } + /* Tell the hardware we're taking care of the + * shutdown, otherwise it will power the box off + * within 3 seconds of the switch being pressed and, + * which is much more important to us, continue to + * assert the common interrupt */ + data = PSI_CLR_SWITCH_OFF; + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG, + 1, &data); + outb(VOYAGER_CAT_END, CAT_CMD); + } else { + + VDEBUG(("Voyager ac fail reg 0x%x\n", + psi_reg.subregs.ACfail)); + if((psi_reg.subregs.ACfail & AC_FAIL_STAT_CHANGE) == 0) { + /* No further update */ + return; + } +#if 0 + /* Don't bother trying to find out who failed. + * FIXME: This probably makes the code incorrect on + * anything other than a 345x */ + for(i=0; i< 5; i++) { + if( psi_reg.subregs.ACfail &(1<<i)) { + break; + } + } + printk(KERN_NOTICE "AC FAIL IN SUPPLY %d\n", i); +#endif + /* DON'T do this: it shuts down the AC PSI + outb(VOYAGER_CAT_RUN, CAT_CMD); + data = PSI_MASK_MASK | i; + cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_MASK, + 1, &data); + outb(VOYAGER_CAT_END, CAT_CMD); + */ + printk(KERN_ERR "Voyager AC power failure\n"); + outb(VOYAGER_CAT_RUN, CAT_CMD); + data = PSI_COLD_START; + cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, + 1, &data); + outb(VOYAGER_CAT_END, CAT_CMD); + voyager_status.power_fail = 1; + voyager_status.request_from_kernel = 1; + up(&kvoyagerd_sem); + } + + + } else if(psi_reg.regs.intstatus & PSI_FAULT) { + /* Major fault! */ + printk(KERN_ERR "Voyager PSI Detected major fault, immediate power off!\n"); + voyager_cat_power_off(); + /* not reached */ + } else if(psi_reg.regs.intstatus & (PSI_DC_FAIL | PSI_ALARM + | PSI_CURRENT | PSI_DVM + | PSI_PSCFAULT | PSI_STAT_CHG)) { + /* other psi fault */ + + printk(KERN_WARNING "Voyager PSI status 0x%x\n", data); + /* clear the PSI fault */ + outb(VOYAGER_CAT_RUN, CAT_CMD); + cat_write(&psi, &psi_asic, VOYAGER_PSI_STATUS_REG, 0); + outb(VOYAGER_CAT_END, CAT_CMD); + } +} diff --git a/arch/i386/mach-voyager/voyager_smp.c b/arch/i386/mach-voyager/voyager_smp.c new file mode 100644 index 00000000000..903d739ca74 --- /dev/null +++ b/arch/i386/mach-voyager/voyager_smp.c @@ -0,0 +1,1931 @@ +/* -*- mode: c; c-basic-offset: 8 -*- */ + +/* Copyright (C) 1999,2001 + * + * Author: J.E.J.Bottomley@HansenPartnership.com + * + * linux/arch/i386/kernel/voyager_smp.c + * + * This file provides all the same external entries as smp.c but uses + * the voyager hal to provide the functionality + */ +#include <linux/config.h> +#include <linux/mm.h> +#include <linux/kernel_stat.h> +#include <linux/delay.h> +#include <linux/mc146818rtc.h> +#include <linux/cache.h> +#include <linux/interrupt.h> +#include <linux/smp_lock.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/bootmem.h> +#include <linux/completion.h> +#include <asm/desc.h> +#include <asm/voyager.h> +#include <asm/vic.h> +#include <asm/mtrr.h> +#include <asm/pgalloc.h> +#include <asm/tlbflush.h> +#include <asm/arch_hooks.h> + +#include <linux/irq.h> + +/* TLB state -- visible externally, indexed physically */ +DEFINE_PER_CPU(struct tlb_state, cpu_tlbstate) ____cacheline_aligned = { &init_mm, 0 }; + +/* CPU IRQ affinity -- set to all ones initially */ +static unsigned long cpu_irq_affinity[NR_CPUS] __cacheline_aligned = { [0 ... NR_CPUS-1] = ~0UL }; + +/* per CPU data structure (for /proc/cpuinfo et al), visible externally + * indexed physically */ +struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned; + +/* physical ID of the CPU used to boot the system */ +unsigned char boot_cpu_id; + +/* The memory line addresses for the Quad CPIs */ +struct voyager_qic_cpi *voyager_quad_cpi_addr[NR_CPUS] __cacheline_aligned; + +/* The masks for the Extended VIC processors, filled in by cat_init */ +__u32 voyager_extended_vic_processors = 0; + +/* Masks for the extended Quad processors which cannot be VIC booted */ +__u32 voyager_allowed_boot_processors = 0; + +/* The mask for the Quad Processors (both extended and non-extended) */ +__u32 voyager_quad_processors = 0; + +/* Total count of live CPUs, used in process.c to display + * the CPU information and in irq.c for the per CPU irq + * activity count. Finally exported by i386_ksyms.c */ +static int voyager_extended_cpus = 1; + +/* Have we found an SMP box - used by time.c to do the profiling + interrupt for timeslicing; do not set to 1 until the per CPU timer + interrupt is active */ +int smp_found_config = 0; + +/* Used for the invalidate map that's also checked in the spinlock */ +static volatile unsigned long smp_invalidate_needed; + +/* Bitmask of currently online CPUs - used by setup.c for + /proc/cpuinfo, visible externally but still physical */ +cpumask_t cpu_online_map = CPU_MASK_NONE; + +/* Bitmask of CPUs present in the system - exported by i386_syms.c, used + * by scheduler but indexed physically */ +cpumask_t phys_cpu_present_map = CPU_MASK_NONE; + + +/* The internal functions */ +static void send_CPI(__u32 cpuset, __u8 cpi); +static void ack_CPI(__u8 cpi); +static int ack_QIC_CPI(__u8 cpi); +static void ack_special_QIC_CPI(__u8 cpi); +static void ack_VIC_CPI(__u8 cpi); +static void send_CPI_allbutself(__u8 cpi); +static void enable_vic_irq(unsigned int irq); +static void disable_vic_irq(unsigned int irq); +static unsigned int startup_vic_irq(unsigned int irq); +static void enable_local_vic_irq(unsigned int irq); +static void disable_local_vic_irq(unsigned int irq); +static void before_handle_vic_irq(unsigned int irq); +static void after_handle_vic_irq(unsigned int irq); +static void set_vic_irq_affinity(unsigned int irq, cpumask_t mask); +static void ack_vic_irq(unsigned int irq); +static void vic_enable_cpi(void); +static void do_boot_cpu(__u8 cpuid); +static void do_quad_bootstrap(void); +static inline void wrapper_smp_local_timer_interrupt(struct pt_regs *); + +int hard_smp_processor_id(void); + +/* Inline functions */ +static inline void +send_one_QIC_CPI(__u8 cpu, __u8 cpi) +{ + voyager_quad_cpi_addr[cpu]->qic_cpi[cpi].cpi = + (smp_processor_id() << 16) + cpi; +} + +static inline void +send_QIC_CPI(__u32 cpuset, __u8 cpi) +{ + int cpu; + + for_each_online_cpu(cpu) { + if(cpuset & (1<<cpu)) { +#ifdef VOYAGER_DEBUG + if(!cpu_isset(cpu, cpu_online_map)) + VDEBUG(("CPU%d sending cpi %d to CPU%d not in cpu_online_map\n", hard_smp_processor_id(), cpi, cpu)); +#endif + send_one_QIC_CPI(cpu, cpi - QIC_CPI_OFFSET); + } + } +} + +static inline void +send_one_CPI(__u8 cpu, __u8 cpi) +{ + if(voyager_quad_processors & (1<<cpu)) + send_one_QIC_CPI(cpu, cpi - QIC_CPI_OFFSET); + else + send_CPI(1<<cpu, cpi); +} + +static inline void +send_CPI_allbutself(__u8 cpi) +{ + __u8 cpu = smp_processor_id(); + __u32 mask = cpus_addr(cpu_online_map)[0] & ~(1 << cpu); + send_CPI(mask, cpi); +} + +static inline int +is_cpu_quad(void) +{ + __u8 cpumask = inb(VIC_PROC_WHO_AM_I); + return ((cpumask & QUAD_IDENTIFIER) == QUAD_IDENTIFIER); +} + +static inline int +is_cpu_extended(void) +{ + __u8 cpu = hard_smp_processor_id(); + + return(voyager_extended_vic_processors & (1<<cpu)); +} + +static inline int +is_cpu_vic_boot(void) +{ + __u8 cpu = hard_smp_processor_id(); + + return(voyager_extended_vic_processors + & voyager_allowed_boot_processors & (1<<cpu)); +} + + +static inline void +ack_CPI(__u8 cpi) +{ + switch(cpi) { + case VIC_CPU_BOOT_CPI: + if(is_cpu_quad() && !is_cpu_vic_boot()) + ack_QIC_CPI(cpi); + else + ack_VIC_CPI(cpi); + break; + case VIC_SYS_INT: + case VIC_CMN_INT: + /* These are slightly strange. Even on the Quad card, + * They are vectored as VIC CPIs */ + if(is_cpu_quad()) + ack_special_QIC_CPI(cpi); + else + ack_VIC_CPI(cpi); + break; + default: + printk("VOYAGER ERROR: CPI%d is in common CPI code\n", cpi); + break; + } +} + +/* local variables */ + +/* The VIC IRQ descriptors -- these look almost identical to the + * 8259 IRQs except that masks and things must be kept per processor + */ +static struct hw_interrupt_type vic_irq_type = { + .typename = "VIC-level", + .startup = startup_vic_irq, + .shutdown = disable_vic_irq, + .enable = enable_vic_irq, + .disable = disable_vic_irq, + .ack = before_handle_vic_irq, + .end = after_handle_vic_irq, + .set_affinity = set_vic_irq_affinity, +}; + +/* used to count up as CPUs are brought on line (starts at 0) */ +static int cpucount = 0; + +/* steal a page from the bottom of memory for the trampoline and + * squirrel its address away here. This will be in kernel virtual + * space */ +static __u32 trampoline_base; + +/* The per cpu profile stuff - used in smp_local_timer_interrupt */ +static DEFINE_PER_CPU(int, prof_multiplier) = 1; +static DEFINE_PER_CPU(int, prof_old_multiplier) = 1; +static DEFINE_PER_CPU(int, prof_counter) = 1; + +/* the map used to check if a CPU has booted */ +static __u32 cpu_booted_map; + +/* the synchronize flag used to hold all secondary CPUs spinning in + * a tight loop until the boot sequence is ready for them */ +static cpumask_t smp_commenced_mask = CPU_MASK_NONE; + +/* This is for the new dynamic CPU boot code */ +cpumask_t cpu_callin_map = CPU_MASK_NONE; +cpumask_t cpu_callout_map = CPU_MASK_NONE; + +/* The per processor IRQ masks (these are usually kept in sync) */ +static __u16 vic_irq_mask[NR_CPUS] __cacheline_aligned; + +/* the list of IRQs to be enabled by the VIC_ENABLE_IRQ_CPI */ +static __u16 vic_irq_enable_mask[NR_CPUS] __cacheline_aligned = { 0 }; + +/* Lock for enable/disable of VIC interrupts */ +static __cacheline_aligned DEFINE_SPINLOCK(vic_irq_lock); + +/* The boot processor is correctly set up in PC mode when it + * comes up, but the secondaries need their master/slave 8259 + * pairs initializing correctly */ + +/* Interrupt counters (per cpu) and total - used to try to + * even up the interrupt handling routines */ +static long vic_intr_total = 0; +static long vic_intr_count[NR_CPUS] __cacheline_aligned = { 0 }; +static unsigned long vic_tick[NR_CPUS] __cacheline_aligned = { 0 }; + +/* Since we can only use CPI0, we fake all the other CPIs */ +static unsigned long vic_cpi_mailbox[NR_CPUS] __cacheline_aligned; + +/* debugging routine to read the isr of the cpu's pic */ +static inline __u16 +vic_read_isr(void) +{ + __u16 isr; + + outb(0x0b, 0xa0); + isr = inb(0xa0) << 8; + outb(0x0b, 0x20); + isr |= inb(0x20); + + return isr; +} + +static __init void +qic_setup(void) +{ + if(!is_cpu_quad()) { + /* not a quad, no setup */ + return; + } + outb(QIC_DEFAULT_MASK0, QIC_MASK_REGISTER0); + outb(QIC_CPI_ENABLE, QIC_MASK_REGISTER1); + + if(is_cpu_extended()) { + /* the QIC duplicate of the VIC base register */ + outb(VIC_DEFAULT_CPI_BASE, QIC_VIC_CPI_BASE_REGISTER); + outb(QIC_DEFAULT_CPI_BASE, QIC_CPI_BASE_REGISTER); + + /* FIXME: should set up the QIC timer and memory parity + * error vectors here */ + } +} + +static __init void +vic_setup_pic(void) +{ + outb(1, VIC_REDIRECT_REGISTER_1); + /* clear the claim registers for dynamic routing */ + outb(0, VIC_CLAIM_REGISTER_0); + outb(0, VIC_CLAIM_REGISTER_1); + + outb(0, VIC_PRIORITY_REGISTER); + /* Set the Primary and Secondary Microchannel vector + * bases to be the same as the ordinary interrupts + * + * FIXME: This would be more efficient using separate + * vectors. */ + outb(FIRST_EXTERNAL_VECTOR, VIC_PRIMARY_MC_BASE); + outb(FIRST_EXTERNAL_VECTOR, VIC_SECONDARY_MC_BASE); + /* Now initiallise the master PIC belonging to this CPU by + * sending the four ICWs */ + + /* ICW1: level triggered, ICW4 needed */ + outb(0x19, 0x20); + + /* ICW2: vector base */ + outb(FIRST_EXTERNAL_VECTOR, 0x21); + + /* ICW3: slave at line 2 */ + outb(0x04, 0x21); + + /* ICW4: 8086 mode */ + outb(0x01, 0x21); + + /* now the same for the slave PIC */ + + /* ICW1: level trigger, ICW4 needed */ + outb(0x19, 0xA0); + + /* ICW2: slave vector base */ + outb(FIRST_EXTERNAL_VECTOR + 8, 0xA1); + + /* ICW3: slave ID */ + outb(0x02, 0xA1); + + /* ICW4: 8086 mode */ + outb(0x01, 0xA1); +} + +static void +do_quad_bootstrap(void) +{ + if(is_cpu_quad() && is_cpu_vic_boot()) { + int i; + unsigned long flags; + __u8 cpuid = hard_smp_processor_id(); + + local_irq_save(flags); + + for(i = 0; i<4; i++) { + /* FIXME: this would be >>3 &0x7 on the 32 way */ + if(((cpuid >> 2) & 0x03) == i) + /* don't lower our own mask! */ + continue; + + /* masquerade as local Quad CPU */ + outb(QIC_CPUID_ENABLE | i, QIC_PROCESSOR_ID); + /* enable the startup CPI */ + outb(QIC_BOOT_CPI_MASK, QIC_MASK_REGISTER1); + /* restore cpu id */ + outb(0, QIC_PROCESSOR_ID); + } + local_irq_restore(flags); + } +} + + +/* Set up all the basic stuff: read the SMP config and make all the + * SMP information reflect only the boot cpu. All others will be + * brought on-line later. */ +void __init +find_smp_config(void) +{ + int i; + + boot_cpu_id = hard_smp_processor_id(); + + printk("VOYAGER SMP: Boot cpu is %d\n", boot_cpu_id); + + /* initialize the CPU structures (moved from smp_boot_cpus) */ + for(i=0; i<NR_CPUS; i++) { + cpu_irq_affinity[i] = ~0; + } + cpu_online_map = cpumask_of_cpu(boot_cpu_id); + + /* The boot CPU must be extended */ + voyager_extended_vic_processors = 1<<boot_cpu_id; + /* initially, all of the first 8 cpu's can boot */ + voyager_allowed_boot_processors = 0xff; + /* set up everything for just this CPU, we can alter + * this as we start the other CPUs later */ + /* now get the CPU disposition from the extended CMOS */ + cpus_addr(phys_cpu_present_map)[0] = voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK); + cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 1) << 8; + cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 2) << 16; + cpus_addr(phys_cpu_present_map)[0] |= voyager_extended_cmos_read(VOYAGER_PROCESSOR_PRESENT_MASK + 3) << 24; + printk("VOYAGER SMP: phys_cpu_present_map = 0x%lx\n", cpus_addr(phys_cpu_present_map)[0]); + /* Here we set up the VIC to enable SMP */ + /* enable the CPIs by writing the base vector to their register */ + outb(VIC_DEFAULT_CPI_BASE, VIC_CPI_BASE_REGISTER); + outb(1, VIC_REDIRECT_REGISTER_1); + /* set the claim registers for static routing --- Boot CPU gets + * all interrupts untill all other CPUs started */ + outb(0xff, VIC_CLAIM_REGISTER_0); + outb(0xff, VIC_CLAIM_REGISTER_1); + /* Set the Primary and Secondary Microchannel vector + * bases to be the same as the ordinary interrupts + * + * FIXME: This would be more efficient using separate + * vectors. */ + outb(FIRST_EXTERNAL_VECTOR, VIC_PRIMARY_MC_BASE); + outb(FIRST_EXTERNAL_VECTOR, VIC_SECONDARY_MC_BASE); + + /* Finally tell the firmware that we're driving */ + outb(inb(VOYAGER_SUS_IN_CONTROL_PORT) | VOYAGER_IN_CONTROL_FLAG, + VOYAGER_SUS_IN_CONTROL_PORT); + + current_thread_info()->cpu = boot_cpu_id; +} + +/* + * The bootstrap kernel entry code has set these up. Save them + * for a given CPU, id is physical */ +void __init +smp_store_cpu_info(int id) +{ + struct cpuinfo_x86 *c=&cpu_data[id]; + + *c = boot_cpu_data; + + identify_cpu(c); +} + +/* set up the trampoline and return the physical address of the code */ +static __u32 __init +setup_trampoline(void) +{ + /* these two are global symbols in trampoline.S */ + extern __u8 trampoline_end[]; + extern __u8 trampoline_data[]; + + memcpy((__u8 *)trampoline_base, trampoline_data, + trampoline_end - trampoline_data); + return virt_to_phys((__u8 *)trampoline_base); +} + +/* Routine initially called when a non-boot CPU is brought online */ +static void __init +start_secondary(void *unused) +{ + __u8 cpuid = hard_smp_processor_id(); + /* external functions not defined in the headers */ + extern void calibrate_delay(void); + + cpu_init(); + + /* OK, we're in the routine */ + ack_CPI(VIC_CPU_BOOT_CPI); + + /* setup the 8259 master slave pair belonging to this CPU --- + * we won't actually receive any until the boot CPU + * relinquishes it's static routing mask */ + vic_setup_pic(); + + qic_setup(); + + if(is_cpu_quad() && !is_cpu_vic_boot()) { + /* clear the boot CPI */ + __u8 dummy; + + dummy = voyager_quad_cpi_addr[cpuid]->qic_cpi[VIC_CPU_BOOT_CPI].cpi; + printk("read dummy %d\n", dummy); + } + + /* lower the mask to receive CPIs */ + vic_enable_cpi(); + + VDEBUG(("VOYAGER SMP: CPU%d, stack at about %p\n", cpuid, &cpuid)); + + /* enable interrupts */ + local_irq_enable(); + + /* get our bogomips */ + calibrate_delay(); + + /* save our processor parameters */ + smp_store_cpu_info(cpuid); + + /* if we're a quad, we may need to bootstrap other CPUs */ + do_quad_bootstrap(); + + /* FIXME: this is rather a poor hack to prevent the CPU + * activating softirqs while it's supposed to be waiting for + * permission to proceed. Without this, the new per CPU stuff + * in the softirqs will fail */ + local_irq_disable(); + cpu_set(cpuid, cpu_callin_map); + + /* signal that we're done */ + cpu_booted_map = 1; + + while (!cpu_isset(cpuid, smp_commenced_mask)) + rep_nop(); + local_irq_enable(); + + local_flush_tlb(); + + cpu_set(cpuid, cpu_online_map); + wmb(); + cpu_idle(); +} + + +/* Routine to kick start the given CPU and wait for it to report ready + * (or timeout in startup). When this routine returns, the requested + * CPU is either fully running and configured or known to be dead. + * + * We call this routine sequentially 1 CPU at a time, so no need for + * locking */ + +static void __init +do_boot_cpu(__u8 cpu) +{ + struct task_struct *idle; + int timeout; + unsigned long flags; + int quad_boot = (1<<cpu) & voyager_quad_processors + & ~( voyager_extended_vic_processors + & voyager_allowed_boot_processors); + + /* For the 486, we can't use the 4Mb page table trick, so + * must map a region of memory */ +#ifdef CONFIG_M486 + int i; + unsigned long *page_table_copies = (unsigned long *) + __get_free_page(GFP_KERNEL); +#endif + pgd_t orig_swapper_pg_dir0; + + /* This is an area in head.S which was used to set up the + * initial kernel stack. We need to alter this to give the + * booting CPU a new stack (taken from its idle process) */ + extern struct { + __u8 *esp; + unsigned short ss; + } stack_start; + /* This is the format of the CPI IDT gate (in real mode) which + * we're hijacking to boot the CPU */ + union IDTFormat { + struct seg { + __u16 Offset; + __u16 Segment; + } idt; + __u32 val; + } hijack_source; + + __u32 *hijack_vector; + __u32 start_phys_address = setup_trampoline(); + + /* There's a clever trick to this: The linux trampoline is + * compiled to begin at absolute location zero, so make the + * address zero but have the data segment selector compensate + * for the actual address */ + hijack_source.idt.Offset = start_phys_address & 0x000F; + hijack_source.idt.Segment = (start_phys_address >> 4) & 0xFFFF; + + cpucount++; + idle = fork_idle(cpu); + if(IS_ERR(idle)) + panic("failed fork for CPU%d", cpu); + idle->thread.eip = (unsigned long) start_secondary; + /* init_tasks (in sched.c) is indexed logically */ + stack_start.esp = (void *) idle->thread.esp; + + irq_ctx_init(cpu); + + /* Note: Don't modify initial ss override */ + VDEBUG(("VOYAGER SMP: Booting CPU%d at 0x%lx[%x:%x], stack %p\n", cpu, + (unsigned long)hijack_source.val, hijack_source.idt.Segment, + hijack_source.idt.Offset, stack_start.esp)); + /* set the original swapper_pg_dir[0] to map 0 to 4Mb transparently + * (so that the booting CPU can find start_32 */ + orig_swapper_pg_dir0 = swapper_pg_dir[0]; +#ifdef CONFIG_M486 + if(page_table_copies == NULL) + panic("No free memory for 486 page tables\n"); + for(i = 0; i < PAGE_SIZE/sizeof(unsigned long); i++) + page_table_copies[i] = (i * PAGE_SIZE) + | _PAGE_RW | _PAGE_USER | _PAGE_PRESENT; + + ((unsigned long *)swapper_pg_dir)[0] = + ((virt_to_phys(page_table_copies)) & PAGE_MASK) + | _PAGE_RW | _PAGE_USER | _PAGE_PRESENT; +#else + ((unsigned long *)swapper_pg_dir)[0] = + (virt_to_phys(pg0) & PAGE_MASK) + | _PAGE_RW | _PAGE_USER | _PAGE_PRESENT; +#endif + + if(quad_boot) { + printk("CPU %d: non extended Quad boot\n", cpu); + hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_CPI + QIC_DEFAULT_CPI_BASE)*4); + *hijack_vector = hijack_source.val; + } else { + printk("CPU%d: extended VIC boot\n", cpu); + hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_CPI + VIC_DEFAULT_CPI_BASE)*4); + *hijack_vector = hijack_source.val; + /* VIC errata, may also receive interrupt at this address */ + hijack_vector = (__u32 *)phys_to_virt((VIC_CPU_BOOT_ERRATA_CPI + VIC_DEFAULT_CPI_BASE)*4); + *hijack_vector = hijack_source.val; + } + /* All non-boot CPUs start with interrupts fully masked. Need + * to lower the mask of the CPI we're about to send. We do + * this in the VIC by masquerading as the processor we're + * about to boot and lowering its interrupt mask */ + local_irq_save(flags); + if(quad_boot) { + send_one_QIC_CPI(cpu, VIC_CPU_BOOT_CPI); + } else { + outb(VIC_CPU_MASQUERADE_ENABLE | cpu, VIC_PROCESSOR_ID); + /* here we're altering registers belonging to `cpu' */ + + outb(VIC_BOOT_INTERRUPT_MASK, 0x21); + /* now go back to our original identity */ + outb(boot_cpu_id, VIC_PROCESSOR_ID); + + /* and boot the CPU */ + + send_CPI((1<<cpu), VIC_CPU_BOOT_CPI); + } + cpu_booted_map = 0; + local_irq_restore(flags); + + /* now wait for it to become ready (or timeout) */ + for(timeout = 0; timeout < 50000; timeout++) { + if(cpu_booted_map) + break; + udelay(100); + } + /* reset the page table */ + swapper_pg_dir[0] = orig_swapper_pg_dir0; + local_flush_tlb(); +#ifdef CONFIG_M486 + free_page((unsigned long)page_table_copies); +#endif + + if (cpu_booted_map) { + VDEBUG(("CPU%d: Booted successfully, back in CPU %d\n", + cpu, smp_processor_id())); + + printk("CPU%d: ", cpu); + print_cpu_info(&cpu_data[cpu]); + wmb(); + cpu_set(cpu, cpu_callout_map); + } + else { + printk("CPU%d FAILED TO BOOT: ", cpu); + if (*((volatile unsigned char *)phys_to_virt(start_phys_address))==0xA5) + printk("Stuck.\n"); + else + printk("Not responding.\n"); + + cpucount--; + } +} + +void __init +smp_boot_cpus(void) +{ + int i; + + /* CAT BUS initialisation must be done after the memory */ + /* FIXME: The L4 has a catbus too, it just needs to be + * accessed in a totally different way */ + if(voyager_level == 5) { + voyager_cat_init(); + + /* now that the cat has probed the Voyager System Bus, sanity + * check the cpu map */ + if( ((voyager_quad_processors | voyager_extended_vic_processors) + & cpus_addr(phys_cpu_present_map)[0]) != cpus_addr(phys_cpu_present_map)[0]) { + /* should panic */ + printk("\n\n***WARNING*** Sanity check of CPU present map FAILED\n"); + } + } else if(voyager_level == 4) + voyager_extended_vic_processors = cpus_addr(phys_cpu_present_map)[0]; + + /* this sets up the idle task to run on the current cpu */ + voyager_extended_cpus = 1; + /* Remove the global_irq_holder setting, it triggers a BUG() on + * schedule at the moment */ + //global_irq_holder = boot_cpu_id; + + /* FIXME: Need to do something about this but currently only works + * on CPUs with a tsc which none of mine have. + smp_tune_scheduling(); + */ + smp_store_cpu_info(boot_cpu_id); + printk("CPU%d: ", boot_cpu_id); + print_cpu_info(&cpu_data[boot_cpu_id]); + + if(is_cpu_quad()) { + /* booting on a Quad CPU */ + printk("VOYAGER SMP: Boot CPU is Quad\n"); + qic_setup(); + do_quad_bootstrap(); + } + + /* enable our own CPIs */ + vic_enable_cpi(); + + cpu_set(boot_cpu_id, cpu_online_map); + cpu_set(boot_cpu_id, cpu_callout_map); + + /* loop over all the extended VIC CPUs and boot them. The + * Quad CPUs must be bootstrapped by their extended VIC cpu */ + for(i = 0; i < NR_CPUS; i++) { + if(i == boot_cpu_id || !cpu_isset(i, phys_cpu_present_map)) + continue; + do_boot_cpu(i); + /* This udelay seems to be needed for the Quad boots + * don't remove unless you know what you're doing */ + udelay(1000); + } + /* we could compute the total bogomips here, but why bother?, + * Code added from smpboot.c */ + { + unsigned long bogosum = 0; + for (i = 0; i < NR_CPUS; i++) + if (cpu_isset(i, cpu_online_map)) + bogosum += cpu_data[i].loops_per_jiffy; + printk(KERN_INFO "Total of %d processors activated (%lu.%02lu BogoMIPS).\n", + cpucount+1, + bogosum/(500000/HZ), + (bogosum/(5000/HZ))%100); + } + voyager_extended_cpus = hweight32(voyager_extended_vic_processors); + printk("VOYAGER: Extended (interrupt handling CPUs): %d, non-extended: %d\n", voyager_extended_cpus, num_booting_cpus() - voyager_extended_cpus); + /* that's it, switch to symmetric mode */ + outb(0, VIC_PRIORITY_REGISTER); + outb(0, VIC_CLAIM_REGISTER_0); + outb(0, VIC_CLAIM_REGISTER_1); + + VDEBUG(("VOYAGER SMP: Booted with %d CPUs\n", num_booting_cpus())); +} + +/* Reload the secondary CPUs task structure (this function does not + * return ) */ +void __init +initialize_secondary(void) +{ +#if 0 + // AC kernels only + set_current(hard_get_current()); +#endif + + /* + * We don't actually need to load the full TSS, + * basically just the stack pointer and the eip. + */ + + asm volatile( + "movl %0,%%esp\n\t" + "jmp *%1" + : + :"r" (current->thread.esp),"r" (current->thread.eip)); +} + +/* handle a Voyager SYS_INT -- If we don't, the base board will + * panic the system. + * + * System interrupts occur because some problem was detected on the + * various busses. To find out what you have to probe all the + * hardware via the CAT bus. FIXME: At the moment we do nothing. */ +fastcall void +smp_vic_sys_interrupt(struct pt_regs *regs) +{ + ack_CPI(VIC_SYS_INT); + printk("Voyager SYSTEM INTERRUPT\n"); +} + +/* Handle a voyager CMN_INT; These interrupts occur either because of + * a system status change or because a single bit memory error + * occurred. FIXME: At the moment, ignore all this. */ +fastcall void +smp_vic_cmn_interrupt(struct pt_regs *regs) +{ + static __u8 in_cmn_int = 0; + static DEFINE_SPINLOCK(cmn_int_lock); + + /* common ints are broadcast, so make sure we only do this once */ + _raw_spin_lock(&cmn_int_lock); + if(in_cmn_int) + goto unlock_end; + + in_cmn_int++; + _raw_spin_unlock(&cmn_int_lock); + + VDEBUG(("Voyager COMMON INTERRUPT\n")); + + if(voyager_level == 5) + voyager_cat_do_common_interrupt(); + + _raw_spin_lock(&cmn_int_lock); + in_cmn_int = 0; + unlock_end: + _raw_spin_unlock(&cmn_int_lock); + ack_CPI(VIC_CMN_INT); +} + +/* + * Reschedule call back. Nothing to do, all the work is done + * automatically when we return from the interrupt. */ +static void +smp_reschedule_interrupt(void) +{ + /* do nothing */ +} + +static struct mm_struct * flush_mm; +static unsigned long flush_va; +static DEFINE_SPINLOCK(tlbstate_lock); +#define FLUSH_ALL 0xffffffff + +/* + * We cannot call mmdrop() because we are in interrupt context, + * instead update mm->cpu_vm_mask. + * + * We need to reload %cr3 since the page tables may be going + * away from under us.. + */ +static inline void +leave_mm (unsigned long cpu) +{ + if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK) + BUG(); + cpu_clear(cpu, per_cpu(cpu_tlbstate, cpu).active_mm->cpu_vm_mask); + load_cr3(swapper_pg_dir); +} + + +/* + * Invalidate call-back + */ +static void +smp_invalidate_interrupt(void) +{ + __u8 cpu = smp_processor_id(); + + if (!test_bit(cpu, &smp_invalidate_needed)) + return; + /* This will flood messages. Don't uncomment unless you see + * Problems with cross cpu invalidation + VDEBUG(("VOYAGER SMP: CPU%d received INVALIDATE_CPI\n", + smp_processor_id())); + */ + + if (flush_mm == per_cpu(cpu_tlbstate, cpu).active_mm) { + if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK) { + if (flush_va == FLUSH_ALL) + local_flush_tlb(); + else + __flush_tlb_one(flush_va); + } else + leave_mm(cpu); + } + smp_mb__before_clear_bit(); + clear_bit(cpu, &smp_invalidate_needed); + smp_mb__after_clear_bit(); +} + +/* All the new flush operations for 2.4 */ + + +/* This routine is called with a physical cpu mask */ +static void +flush_tlb_others (unsigned long cpumask, struct mm_struct *mm, + unsigned long va) +{ + int stuck = 50000; + + if (!cpumask) + BUG(); + if ((cpumask & cpus_addr(cpu_online_map)[0]) != cpumask) + BUG(); + if (cpumask & (1 << smp_processor_id())) + BUG(); + if (!mm) + BUG(); + + spin_lock(&tlbstate_lock); + + flush_mm = mm; + flush_va = va; + atomic_set_mask(cpumask, &smp_invalidate_needed); + /* + * We have to send the CPI only to + * CPUs affected. + */ + send_CPI(cpumask, VIC_INVALIDATE_CPI); + + while (smp_invalidate_needed) { + mb(); + if(--stuck == 0) { + printk("***WARNING*** Stuck doing invalidate CPI (CPU%d)\n", smp_processor_id()); + break; + } + } + + /* Uncomment only to debug invalidation problems + VDEBUG(("VOYAGER SMP: Completed invalidate CPI (CPU%d)\n", cpu)); + */ + + flush_mm = NULL; + flush_va = 0; + spin_unlock(&tlbstate_lock); +} + +void +flush_tlb_current_task(void) +{ + struct mm_struct *mm = current->mm; + unsigned long cpu_mask; + + preempt_disable(); + + cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id()); + local_flush_tlb(); + if (cpu_mask) + flush_tlb_others(cpu_mask, mm, FLUSH_ALL); + + preempt_enable(); +} + + +void +flush_tlb_mm (struct mm_struct * mm) +{ + unsigned long cpu_mask; + + preempt_disable(); + + cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id()); + + if (current->active_mm == mm) { + if (current->mm) + local_flush_tlb(); + else + leave_mm(smp_processor_id()); + } + if (cpu_mask) + flush_tlb_others(cpu_mask, mm, FLUSH_ALL); + + preempt_enable(); +} + +void flush_tlb_page(struct vm_area_struct * vma, unsigned long va) +{ + struct mm_struct *mm = vma->vm_mm; + unsigned long cpu_mask; + + preempt_disable(); + + cpu_mask = cpus_addr(mm->cpu_vm_mask)[0] & ~(1 << smp_processor_id()); + if (current->active_mm == mm) { + if(current->mm) + __flush_tlb_one(va); + else + leave_mm(smp_processor_id()); + } + + if (cpu_mask) + flush_tlb_others(cpu_mask, mm, va); + + preempt_enable(); +} + +/* enable the requested IRQs */ +static void +smp_enable_irq_interrupt(void) +{ + __u8 irq; + __u8 cpu = get_cpu(); + + VDEBUG(("VOYAGER SMP: CPU%d enabling irq mask 0x%x\n", cpu, + vic_irq_enable_mask[cpu])); + + spin_lock(&vic_irq_lock); + for(irq = 0; irq < 16; irq++) { + if(vic_irq_enable_mask[cpu] & (1<<irq)) + enable_local_vic_irq(irq); + } + vic_irq_enable_mask[cpu] = 0; + spin_unlock(&vic_irq_lock); + + put_cpu_no_resched(); +} + +/* + * CPU halt call-back + */ +static void +smp_stop_cpu_function(void *dummy) +{ + VDEBUG(("VOYAGER SMP: CPU%d is STOPPING\n", smp_processor_id())); + cpu_clear(smp_processor_id(), cpu_online_map); + local_irq_disable(); + for(;;) + __asm__("hlt"); +} + +static DEFINE_SPINLOCK(call_lock); + +struct call_data_struct { + void (*func) (void *info); + void *info; + volatile unsigned long started; + volatile unsigned long finished; + int wait; +}; + +static struct call_data_struct * call_data; + +/* execute a thread on a new CPU. The function to be called must be + * previously set up. This is used to schedule a function for + * execution on all CPU's - set up the function then broadcast a + * function_interrupt CPI to come here on each CPU */ +static void +smp_call_function_interrupt(void) +{ + void (*func) (void *info) = call_data->func; + void *info = call_data->info; + /* must take copy of wait because call_data may be replaced + * unless the function is waiting for us to finish */ + int wait = call_data->wait; + __u8 cpu = smp_processor_id(); + + /* + * Notify initiating CPU that I've grabbed the data and am + * about to execute the function + */ + mb(); + if(!test_and_clear_bit(cpu, &call_data->started)) { + /* If the bit wasn't set, this could be a replay */ + printk(KERN_WARNING "VOYAGER SMP: CPU %d received call funtion with no call pending\n", cpu); + return; + } + /* + * At this point the info structure may be out of scope unless wait==1 + */ + irq_enter(); + (*func)(info); + irq_exit(); + if (wait) { + mb(); + clear_bit(cpu, &call_data->finished); + } +} + +/* Call this function on all CPUs using the function_interrupt above + <func> The function to run. This must be fast and non-blocking. + <info> An arbitrary pointer to pass to the function. + <retry> If true, keep retrying until ready. + <wait> If true, wait until function has completed on other CPUs. + [RETURNS] 0 on success, else a negative status code. Does not return until + remote CPUs are nearly ready to execute <<func>> or are or have executed. +*/ +int +smp_call_function (void (*func) (void *info), void *info, int retry, + int wait) +{ + struct call_data_struct data; + __u32 mask = cpus_addr(cpu_online_map)[0]; + + mask &= ~(1<<smp_processor_id()); + + if (!mask) + return 0; + + /* Can deadlock when called with interrupts disabled */ + WARN_ON(irqs_disabled()); + + data.func = func; + data.info = info; + data.started = mask; + data.wait = wait; + if (wait) + data.finished = mask; + + spin_lock(&call_lock); + call_data = &data; + wmb(); + /* Send a message to all other CPUs and wait for them to respond */ + send_CPI_allbutself(VIC_CALL_FUNCTION_CPI); + + /* Wait for response */ + while (data.started) + barrier(); + + if (wait) + while (data.finished) + barrier(); + + spin_unlock(&call_lock); + + return 0; +} + +/* Sorry about the name. In an APIC based system, the APICs + * themselves are programmed to send a timer interrupt. This is used + * by linux to reschedule the processor. Voyager doesn't have this, + * so we use the system clock to interrupt one processor, which in + * turn, broadcasts a timer CPI to all the others --- we receive that + * CPI here. We don't use this actually for counting so losing + * ticks doesn't matter + * + * FIXME: For those CPU's which actually have a local APIC, we could + * try to use it to trigger this interrupt instead of having to + * broadcast the timer tick. Unfortunately, all my pentium DYADs have + * no local APIC, so I can't do this + * + * This function is currently a placeholder and is unused in the code */ +fastcall void +smp_apic_timer_interrupt(struct pt_regs *regs) +{ + wrapper_smp_local_timer_interrupt(regs); +} + +/* All of the QUAD interrupt GATES */ +fastcall void +smp_qic_timer_interrupt(struct pt_regs *regs) +{ + ack_QIC_CPI(QIC_TIMER_CPI); + wrapper_smp_local_timer_interrupt(regs); +} + +fastcall void +smp_qic_invalidate_interrupt(struct pt_regs *regs) +{ + ack_QIC_CPI(QIC_INVALIDATE_CPI); + smp_invalidate_interrupt(); +} + +fastcall void +smp_qic_reschedule_interrupt(struct pt_regs *regs) +{ + ack_QIC_CPI(QIC_RESCHEDULE_CPI); + smp_reschedule_interrupt(); +} + +fastcall void +smp_qic_enable_irq_interrupt(struct pt_regs *regs) +{ + ack_QIC_CPI(QIC_ENABLE_IRQ_CPI); + smp_enable_irq_interrupt(); +} + +fastcall void +smp_qic_call_function_interrupt(struct pt_regs *regs) +{ + ack_QIC_CPI(QIC_CALL_FUNCTION_CPI); + smp_call_function_interrupt(); +} + +fastcall void +smp_vic_cpi_interrupt(struct pt_regs *regs) +{ + __u8 cpu = smp_processor_id(); + + if(is_cpu_quad()) + ack_QIC_CPI(VIC_CPI_LEVEL0); + else + ack_VIC_CPI(VIC_CPI_LEVEL0); + + if(test_and_clear_bit(VIC_TIMER_CPI, &vic_cpi_mailbox[cpu])) + wrapper_smp_local_timer_interrupt(regs); + if(test_and_clear_bit(VIC_INVALIDATE_CPI, &vic_cpi_mailbox[cpu])) + smp_invalidate_interrupt(); + if(test_and_clear_bit(VIC_RESCHEDULE_CPI, &vic_cpi_mailbox[cpu])) + smp_reschedule_interrupt(); + if(test_and_clear_bit(VIC_ENABLE_IRQ_CPI, &vic_cpi_mailbox[cpu])) + smp_enable_irq_interrupt(); + if(test_and_clear_bit(VIC_CALL_FUNCTION_CPI, &vic_cpi_mailbox[cpu])) + smp_call_function_interrupt(); +} + +static void +do_flush_tlb_all(void* info) +{ + unsigned long cpu = smp_processor_id(); + + __flush_tlb_all(); + if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_LAZY) + leave_mm(cpu); +} + + +/* flush the TLB of every active CPU in the system */ +void +flush_tlb_all(void) +{ + on_each_cpu(do_flush_tlb_all, 0, 1, 1); +} + +/* used to set up the trampoline for other CPUs when the memory manager + * is sorted out */ +void __init +smp_alloc_memory(void) +{ + trampoline_base = (__u32)alloc_bootmem_low_pages(PAGE_SIZE); + if(__pa(trampoline_base) >= 0x93000) + BUG(); +} + +/* send a reschedule CPI to one CPU by physical CPU number*/ +void +smp_send_reschedule(int cpu) +{ + send_one_CPI(cpu, VIC_RESCHEDULE_CPI); +} + + +int +hard_smp_processor_id(void) +{ + __u8 i; + __u8 cpumask = inb(VIC_PROC_WHO_AM_I); + if((cpumask & QUAD_IDENTIFIER) == QUAD_IDENTIFIER) + return cpumask & 0x1F; + + for(i = 0; i < 8; i++) { + if(cpumask & (1<<i)) + return i; + } + printk("** WARNING ** Illegal cpuid returned by VIC: %d", cpumask); + return 0; +} + +/* broadcast a halt to all other CPUs */ +void +smp_send_stop(void) +{ + smp_call_function(smp_stop_cpu_function, NULL, 1, 1); +} + +/* this function is triggered in time.c when a clock tick fires + * we need to re-broadcast the tick to all CPUs */ +void +smp_vic_timer_interrupt(struct pt_regs *regs) +{ + send_CPI_allbutself(VIC_TIMER_CPI); + smp_local_timer_interrupt(regs); +} + +static inline void +wrapper_smp_local_timer_interrupt(struct pt_regs *regs) +{ + irq_enter(); + smp_local_timer_interrupt(regs); + irq_exit(); +} + +/* local (per CPU) timer interrupt. It does both profiling and + * process statistics/rescheduling. + * + * We do profiling in every local tick, statistics/rescheduling + * happen only every 'profiling multiplier' ticks. The default + * multiplier is 1 and it can be changed by writing the new multiplier + * value into /proc/profile. + */ +void +smp_local_timer_interrupt(struct pt_regs * regs) +{ + int cpu = smp_processor_id(); + long weight; + + profile_tick(CPU_PROFILING, regs); + if (--per_cpu(prof_counter, cpu) <= 0) { + /* + * The multiplier may have changed since the last time we got + * to this point as a result of the user writing to + * /proc/profile. In this case we need to adjust the APIC + * timer accordingly. + * + * Interrupts are already masked off at this point. + */ + per_cpu(prof_counter,cpu) = per_cpu(prof_multiplier, cpu); + if (per_cpu(prof_counter, cpu) != + per_cpu(prof_old_multiplier, cpu)) { + /* FIXME: need to update the vic timer tick here */ + per_cpu(prof_old_multiplier, cpu) = + per_cpu(prof_counter, cpu); + } + + update_process_times(user_mode(regs)); + } + + if( ((1<<cpu) & voyager_extended_vic_processors) == 0) + /* only extended VIC processors participate in + * interrupt distribution */ + return; + + /* + * We take the 'long' return path, and there every subsystem + * grabs the apropriate locks (kernel lock/ irq lock). + * + * we might want to decouple profiling from the 'long path', + * and do the profiling totally in assembly. + * + * Currently this isn't too much of an issue (performance wise), + * we can take more than 100K local irqs per second on a 100 MHz P5. + */ + + if((++vic_tick[cpu] & 0x7) != 0) + return; + /* get here every 16 ticks (about every 1/6 of a second) */ + + /* Change our priority to give someone else a chance at getting + * the IRQ. The algorithm goes like this: + * + * In the VIC, the dynamically routed interrupt is always + * handled by the lowest priority eligible (i.e. receiving + * interrupts) CPU. If >1 eligible CPUs are equal lowest, the + * lowest processor number gets it. + * + * The priority of a CPU is controlled by a special per-CPU + * VIC priority register which is 3 bits wide 0 being lowest + * and 7 highest priority.. + * + * Therefore we subtract the average number of interrupts from + * the number we've fielded. If this number is negative, we + * lower the activity count and if it is positive, we raise + * it. + * + * I'm afraid this still leads to odd looking interrupt counts: + * the totals are all roughly equal, but the individual ones + * look rather skewed. + * + * FIXME: This algorithm is total crap when mixed with SMP + * affinity code since we now try to even up the interrupt + * counts when an affinity binding is keeping them on a + * particular CPU*/ + weight = (vic_intr_count[cpu]*voyager_extended_cpus + - vic_intr_total) >> 4; + weight += 4; + if(weight > 7) + weight = 7; + if(weight < 0) + weight = 0; + + outb((__u8)weight, VIC_PRIORITY_REGISTER); + +#ifdef VOYAGER_DEBUG + if((vic_tick[cpu] & 0xFFF) == 0) { + /* print this message roughly every 25 secs */ + printk("VOYAGER SMP: vic_tick[%d] = %lu, weight = %ld\n", + cpu, vic_tick[cpu], weight); + } +#endif +} + +/* setup the profiling timer */ +int +setup_profiling_timer(unsigned int multiplier) +{ + int i; + + if ( (!multiplier)) + return -EINVAL; + + /* + * Set the new multiplier for each CPU. CPUs don't start using the + * new values until the next timer interrupt in which they do process + * accounting. + */ + for (i = 0; i < NR_CPUS; ++i) + per_cpu(prof_multiplier, i) = multiplier; + + return 0; +} + + +/* The CPIs are handled in the per cpu 8259s, so they must be + * enabled to be received: FIX: enabling the CPIs in the early + * boot sequence interferes with bug checking; enable them later + * on in smp_init */ +#define VIC_SET_GATE(cpi, vector) \ + set_intr_gate((cpi) + VIC_DEFAULT_CPI_BASE, (vector)) +#define QIC_SET_GATE(cpi, vector) \ + set_intr_gate((cpi) + QIC_DEFAULT_CPI_BASE, (vector)) + +void __init +smp_intr_init(void) +{ + int i; + + /* initialize the per cpu irq mask to all disabled */ + for(i = 0; i < NR_CPUS; i++) + vic_irq_mask[i] = 0xFFFF; + + VIC_SET_GATE(VIC_CPI_LEVEL0, vic_cpi_interrupt); + + VIC_SET_GATE(VIC_SYS_INT, vic_sys_interrupt); + VIC_SET_GATE(VIC_CMN_INT, vic_cmn_interrupt); + + QIC_SET_GATE(QIC_TIMER_CPI, qic_timer_interrupt); + QIC_SET_GATE(QIC_INVALIDATE_CPI, qic_invalidate_interrupt); + QIC_SET_GATE(QIC_RESCHEDULE_CPI, qic_reschedule_interrupt); + QIC_SET_GATE(QIC_ENABLE_IRQ_CPI, qic_enable_irq_interrupt); + QIC_SET_GATE(QIC_CALL_FUNCTION_CPI, qic_call_function_interrupt); + + + /* now put the VIC descriptor into the first 48 IRQs + * + * This is for later: first 16 correspond to PC IRQs; next 16 + * are Primary MC IRQs and final 16 are Secondary MC IRQs */ + for(i = 0; i < 48; i++) + irq_desc[i].handler = &vic_irq_type; +} + +/* send a CPI at level cpi to a set of cpus in cpuset (set 1 bit per + * processor to receive CPI */ +static void +send_CPI(__u32 cpuset, __u8 cpi) +{ + int cpu; + __u32 quad_cpuset = (cpuset & voyager_quad_processors); + + if(cpi < VIC_START_FAKE_CPI) { + /* fake CPI are only used for booting, so send to the + * extended quads as well---Quads must be VIC booted */ + outb((__u8)(cpuset), VIC_CPI_Registers[cpi]); + return; + } + if(quad_cpuset) + send_QIC_CPI(quad_cpuset, cpi); + cpuset &= ~quad_cpuset; + cpuset &= 0xff; /* only first 8 CPUs vaild for VIC CPI */ + if(cpuset == 0) + return; + for_each_online_cpu(cpu) { + if(cpuset & (1<<cpu)) + set_bit(cpi, &vic_cpi_mailbox[cpu]); + } + if(cpuset) + outb((__u8)cpuset, VIC_CPI_Registers[VIC_CPI_LEVEL0]); +} + +/* Acknowledge receipt of CPI in the QIC, clear in QIC hardware and + * set the cache line to shared by reading it. + * + * DON'T make this inline otherwise the cache line read will be + * optimised away + * */ +static int +ack_QIC_CPI(__u8 cpi) { + __u8 cpu = hard_smp_processor_id(); + + cpi &= 7; + + outb(1<<cpi, QIC_INTERRUPT_CLEAR1); + return voyager_quad_cpi_addr[cpu]->qic_cpi[cpi].cpi; +} + +static void +ack_special_QIC_CPI(__u8 cpi) +{ + switch(cpi) { + case VIC_CMN_INT: + outb(QIC_CMN_INT, QIC_INTERRUPT_CLEAR0); + break; + case VIC_SYS_INT: + outb(QIC_SYS_INT, QIC_INTERRUPT_CLEAR0); + break; + } + /* also clear at the VIC, just in case (nop for non-extended proc) */ + ack_VIC_CPI(cpi); +} + +/* Acknowledge receipt of CPI in the VIC (essentially an EOI) */ +static void +ack_VIC_CPI(__u8 cpi) +{ +#ifdef VOYAGER_DEBUG + unsigned long flags; + __u16 isr; + __u8 cpu = smp_processor_id(); + + local_irq_save(flags); + isr = vic_read_isr(); + if((isr & (1<<(cpi &7))) == 0) { + printk("VOYAGER SMP: CPU%d lost CPI%d\n", cpu, cpi); + } +#endif + /* send specific EOI; the two system interrupts have + * bit 4 set for a separate vector but behave as the + * corresponding 3 bit intr */ + outb_p(0x60|(cpi & 7),0x20); + +#ifdef VOYAGER_DEBUG + if((vic_read_isr() & (1<<(cpi &7))) != 0) { + printk("VOYAGER SMP: CPU%d still asserting CPI%d\n", cpu, cpi); + } + local_irq_restore(flags); +#endif +} + +/* cribbed with thanks from irq.c */ +#define __byte(x,y) (((unsigned char *)&(y))[x]) +#define cached_21(cpu) (__byte(0,vic_irq_mask[cpu])) +#define cached_A1(cpu) (__byte(1,vic_irq_mask[cpu])) + +static unsigned int +startup_vic_irq(unsigned int irq) +{ + enable_vic_irq(irq); + + return 0; +} + +/* The enable and disable routines. This is where we run into + * conflicting architectural philosophy. Fundamentally, the voyager + * architecture does not expect to have to disable interrupts globally + * (the IRQ controllers belong to each CPU). The processor masquerade + * which is used to start the system shouldn't be used in a running OS + * since it will cause great confusion if two separate CPUs drive to + * the same IRQ controller (I know, I've tried it). + * + * The solution is a variant on the NCR lazy SPL design: + * + * 1) To disable an interrupt, do nothing (other than set the + * IRQ_DISABLED flag). This dares the interrupt actually to arrive. + * + * 2) If the interrupt dares to come in, raise the local mask against + * it (this will result in all the CPU masks being raised + * eventually). + * + * 3) To enable the interrupt, lower the mask on the local CPU and + * broadcast an Interrupt enable CPI which causes all other CPUs to + * adjust their masks accordingly. */ + +static void +enable_vic_irq(unsigned int irq) +{ + /* linux doesn't to processor-irq affinity, so enable on + * all CPUs we know about */ + int cpu = smp_processor_id(), real_cpu; + __u16 mask = (1<<irq); + __u32 processorList = 0; + unsigned long flags; + + VDEBUG(("VOYAGER: enable_vic_irq(%d) CPU%d affinity 0x%lx\n", + irq, cpu, cpu_irq_affinity[cpu])); + spin_lock_irqsave(&vic_irq_lock, flags); + for_each_online_cpu(real_cpu) { + if(!(voyager_extended_vic_processors & (1<<real_cpu))) + continue; + if(!(cpu_irq_affinity[real_cpu] & mask)) { + /* irq has no affinity for this CPU, ignore */ + continue; + } + if(real_cpu == cpu) { + enable_local_vic_irq(irq); + } + else if(vic_irq_mask[real_cpu] & mask) { + vic_irq_enable_mask[real_cpu] |= mask; + processorList |= (1<<real_cpu); + } + } + spin_unlock_irqrestore(&vic_irq_lock, flags); + if(processorList) + send_CPI(processorList, VIC_ENABLE_IRQ_CPI); +} + +static void +disable_vic_irq(unsigned int irq) +{ + /* lazy disable, do nothing */ +} + +static void +enable_local_vic_irq(unsigned int irq) +{ + __u8 cpu = smp_processor_id(); + __u16 mask = ~(1 << irq); + __u16 old_mask = vic_irq_mask[cpu]; + + vic_irq_mask[cpu] &= mask; + if(vic_irq_mask[cpu] == old_mask) + return; + + VDEBUG(("VOYAGER DEBUG: Enabling irq %d in hardware on CPU %d\n", + irq, cpu)); + + if (irq & 8) { + outb_p(cached_A1(cpu),0xA1); + (void)inb_p(0xA1); + } + else { + outb_p(cached_21(cpu),0x21); + (void)inb_p(0x21); + } +} + +static void +disable_local_vic_irq(unsigned int irq) +{ + __u8 cpu = smp_processor_id(); + __u16 mask = (1 << irq); + __u16 old_mask = vic_irq_mask[cpu]; + + if(irq == 7) + return; + + vic_irq_mask[cpu] |= mask; + if(old_mask == vic_irq_mask[cpu]) + return; + + VDEBUG(("VOYAGER DEBUG: Disabling irq %d in hardware on CPU %d\n", + irq, cpu)); + + if (irq & 8) { + outb_p(cached_A1(cpu),0xA1); + (void)inb_p(0xA1); + } + else { + outb_p(cached_21(cpu),0x21); + (void)inb_p(0x21); + } +} + +/* The VIC is level triggered, so the ack can only be issued after the + * interrupt completes. However, we do Voyager lazy interrupt + * handling here: It is an extremely expensive operation to mask an + * interrupt in the vic, so we merely set a flag (IRQ_DISABLED). If + * this interrupt actually comes in, then we mask and ack here to push + * the interrupt off to another CPU */ +static void +before_handle_vic_irq(unsigned int irq) +{ + irq_desc_t *desc = irq_desc + irq; + __u8 cpu = smp_processor_id(); + + _raw_spin_lock(&vic_irq_lock); + vic_intr_total++; + vic_intr_count[cpu]++; + + if(!(cpu_irq_affinity[cpu] & (1<<irq))) { + /* The irq is not in our affinity mask, push it off + * onto another CPU */ + VDEBUG(("VOYAGER DEBUG: affinity triggered disable of irq %d on cpu %d\n", + irq, cpu)); + disable_local_vic_irq(irq); + /* set IRQ_INPROGRESS to prevent the handler in irq.c from + * actually calling the interrupt routine */ + desc->status |= IRQ_REPLAY | IRQ_INPROGRESS; + } else if(desc->status & IRQ_DISABLED) { + /* Damn, the interrupt actually arrived, do the lazy + * disable thing. The interrupt routine in irq.c will + * not handle a IRQ_DISABLED interrupt, so nothing more + * need be done here */ + VDEBUG(("VOYAGER DEBUG: lazy disable of irq %d on CPU %d\n", + irq, cpu)); + disable_local_vic_irq(irq); + desc->status |= IRQ_REPLAY; + } else { + desc->status &= ~IRQ_REPLAY; + } + + _raw_spin_unlock(&vic_irq_lock); +} + +/* Finish the VIC interrupt: basically mask */ +static void +after_handle_vic_irq(unsigned int irq) +{ + irq_desc_t *desc = irq_desc + irq; + + _raw_spin_lock(&vic_irq_lock); + { + unsigned int status = desc->status & ~IRQ_INPROGRESS; +#ifdef VOYAGER_DEBUG + __u16 isr; +#endif + + desc->status = status; + if ((status & IRQ_DISABLED)) + disable_local_vic_irq(irq); +#ifdef VOYAGER_DEBUG + /* DEBUG: before we ack, check what's in progress */ + isr = vic_read_isr(); + if((isr & (1<<irq) && !(status & IRQ_REPLAY)) == 0) { + int i; + __u8 cpu = smp_processor_id(); + __u8 real_cpu; + int mask; /* Um... initialize me??? --RR */ + + printk("VOYAGER SMP: CPU%d lost interrupt %d\n", + cpu, irq); + for_each_cpu(real_cpu, mask) { + + outb(VIC_CPU_MASQUERADE_ENABLE | real_cpu, + VIC_PROCESSOR_ID); + isr = vic_read_isr(); + if(isr & (1<<irq)) { + printk("VOYAGER SMP: CPU%d ack irq %d\n", + real_cpu, irq); + ack_vic_irq(irq); + } + outb(cpu, VIC_PROCESSOR_ID); + } + } +#endif /* VOYAGER_DEBUG */ + /* as soon as we ack, the interrupt is eligible for + * receipt by another CPU so everything must be in + * order here */ + ack_vic_irq(irq); + if(status & IRQ_REPLAY) { + /* replay is set if we disable the interrupt + * in the before_handle_vic_irq() routine, so + * clear the in progress bit here to allow the + * next CPU to handle this correctly */ + desc->status &= ~(IRQ_REPLAY | IRQ_INPROGRESS); + } +#ifdef VOYAGER_DEBUG + isr = vic_read_isr(); + if((isr & (1<<irq)) != 0) + printk("VOYAGER SMP: after_handle_vic_irq() after ack irq=%d, isr=0x%x\n", + irq, isr); +#endif /* VOYAGER_DEBUG */ + } + _raw_spin_unlock(&vic_irq_lock); + + /* All code after this point is out of the main path - the IRQ + * may be intercepted by another CPU if reasserted */ +} + + +/* Linux processor - interrupt affinity manipulations. + * + * For each processor, we maintain a 32 bit irq affinity mask. + * Initially it is set to all 1's so every processor accepts every + * interrupt. In this call, we change the processor's affinity mask: + * + * Change from enable to disable: + * + * If the interrupt ever comes in to the processor, we will disable it + * and ack it to push it off to another CPU, so just accept the mask here. + * + * Change from disable to enable: + * + * change the mask and then do an interrupt enable CPI to re-enable on + * the selected processors */ + +void +set_vic_irq_affinity(unsigned int irq, cpumask_t mask) +{ + /* Only extended processors handle interrupts */ + unsigned long real_mask; + unsigned long irq_mask = 1 << irq; + int cpu; + + real_mask = cpus_addr(mask)[0] & voyager_extended_vic_processors; + + if(cpus_addr(mask)[0] == 0) + /* can't have no cpu's to accept the interrupt -- extremely + * bad things will happen */ + return; + + if(irq == 0) + /* can't change the affinity of the timer IRQ. This + * is due to the constraint in the voyager + * architecture that the CPI also comes in on and IRQ + * line and we have chosen IRQ0 for this. If you + * raise the mask on this interrupt, the processor + * will no-longer be able to accept VIC CPIs */ + return; + + if(irq >= 32) + /* You can only have 32 interrupts in a voyager system + * (and 32 only if you have a secondary microchannel + * bus) */ + return; + + for_each_online_cpu(cpu) { + unsigned long cpu_mask = 1 << cpu; + + if(cpu_mask & real_mask) { + /* enable the interrupt for this cpu */ + cpu_irq_affinity[cpu] |= irq_mask; + } else { + /* disable the interrupt for this cpu */ + cpu_irq_affinity[cpu] &= ~irq_mask; + } + } + /* this is magic, we now have the correct affinity maps, so + * enable the interrupt. This will send an enable CPI to + * those cpu's who need to enable it in their local masks, + * causing them to correct for the new affinity . If the + * interrupt is currently globally disabled, it will simply be + * disabled again as it comes in (voyager lazy disable). If + * the affinity map is tightened to disable the interrupt on a + * cpu, it will be pushed off when it comes in */ + enable_vic_irq(irq); +} + +static void +ack_vic_irq(unsigned int irq) +{ + if (irq & 8) { + outb(0x62,0x20); /* Specific EOI to cascade */ + outb(0x60|(irq & 7),0xA0); + } else { + outb(0x60 | (irq & 7),0x20); + } +} + +/* enable the CPIs. In the VIC, the CPIs are delivered by the 8259 + * but are not vectored by it. This means that the 8259 mask must be + * lowered to receive them */ +static __init void +vic_enable_cpi(void) +{ + __u8 cpu = smp_processor_id(); + + /* just take a copy of the current mask (nop for boot cpu) */ + vic_irq_mask[cpu] = vic_irq_mask[boot_cpu_id]; + + enable_local_vic_irq(VIC_CPI_LEVEL0); + enable_local_vic_irq(VIC_CPI_LEVEL1); + /* for sys int and cmn int */ + enable_local_vic_irq(7); + + if(is_cpu_quad()) { + outb(QIC_DEFAULT_MASK0, QIC_MASK_REGISTER0); + outb(QIC_CPI_ENABLE, QIC_MASK_REGISTER1); + VDEBUG(("VOYAGER SMP: QIC ENABLE CPI: CPU%d: MASK 0x%x\n", + cpu, QIC_CPI_ENABLE)); + } + + VDEBUG(("VOYAGER SMP: ENABLE CPI: CPU%d: MASK 0x%x\n", + cpu, vic_irq_mask[cpu])); +} + +void +voyager_smp_dump() +{ + int old_cpu = smp_processor_id(), cpu; + + /* dump the interrupt masks of each processor */ + for_each_online_cpu(cpu) { + __u16 imr, isr, irr; + unsigned long flags; + + local_irq_save(flags); + outb(VIC_CPU_MASQUERADE_ENABLE | cpu, VIC_PROCESSOR_ID); + imr = (inb(0xa1) << 8) | inb(0x21); + outb(0x0a, 0xa0); + irr = inb(0xa0) << 8; + outb(0x0a, 0x20); + irr |= inb(0x20); + outb(0x0b, 0xa0); + isr = inb(0xa0) << 8; + outb(0x0b, 0x20); + isr |= inb(0x20); + outb(old_cpu, VIC_PROCESSOR_ID); + local_irq_restore(flags); + printk("\tCPU%d: mask=0x%x, IMR=0x%x, IRR=0x%x, ISR=0x%x\n", + cpu, vic_irq_mask[cpu], imr, irr, isr); +#if 0 + /* These lines are put in to try to unstick an un ack'd irq */ + if(isr != 0) { + int irq; + for(irq=0; irq<16; irq++) { + if(isr & (1<<irq)) { + printk("\tCPU%d: ack irq %d\n", + cpu, irq); + local_irq_save(flags); + outb(VIC_CPU_MASQUERADE_ENABLE | cpu, + VIC_PROCESSOR_ID); + ack_vic_irq(irq); + outb(old_cpu, VIC_PROCESSOR_ID); + local_irq_restore(flags); + } + } + } +#endif + } +} + +void +smp_voyager_power_off(void *dummy) +{ + if(smp_processor_id() == boot_cpu_id) + voyager_power_off(); + else + smp_stop_cpu_function(NULL); +} + +void __init +smp_prepare_cpus(unsigned int max_cpus) +{ + /* FIXME: ignore max_cpus for now */ + smp_boot_cpus(); +} + +void __devinit smp_prepare_boot_cpu(void) +{ + cpu_set(smp_processor_id(), cpu_online_map); + cpu_set(smp_processor_id(), cpu_callout_map); +} + +int __devinit +__cpu_up(unsigned int cpu) +{ + /* This only works at boot for x86. See "rewrite" above. */ + if (cpu_isset(cpu, smp_commenced_mask)) + return -ENOSYS; + + /* In case one didn't come up */ + if (!cpu_isset(cpu, cpu_callin_map)) + return -EIO; + /* Unleash the CPU! */ + cpu_set(cpu, smp_commenced_mask); + while (!cpu_isset(cpu, cpu_online_map)) + mb(); + return 0; +} + +void __init +smp_cpus_done(unsigned int max_cpus) +{ + zap_low_mappings(); +} diff --git a/arch/i386/mach-voyager/voyager_thread.c b/arch/i386/mach-voyager/voyager_thread.c new file mode 100644 index 00000000000..9980eef31fd --- /dev/null +++ b/arch/i386/mach-voyager/voyager_thread.c @@ -0,0 +1,167 @@ +/* -*- mode: c; c-basic-offset: 8 -*- */ + +/* Copyright (C) 2001 + * + * Author: J.E.J.Bottomley@HansenPartnership.com + * + * linux/arch/i386/kernel/voyager_thread.c + * + * This module provides the machine status monitor thread for the + * voyager architecture. This allows us to monitor the machine + * environment (temp, voltage, fan function) and the front panel and + * internal UPS. If a fault is detected, this thread takes corrective + * action (usually just informing init) + * */ + +#include <linux/module.h> +#include <linux/config.h> +#include <linux/mm.h> +#include <linux/kernel_stat.h> +#include <linux/delay.h> +#include <linux/mc146818rtc.h> +#include <linux/smp_lock.h> +#include <linux/init.h> +#include <linux/bootmem.h> +#include <linux/kmod.h> +#include <linux/completion.h> +#include <linux/sched.h> +#include <asm/desc.h> +#include <asm/voyager.h> +#include <asm/vic.h> +#include <asm/mtrr.h> +#include <asm/msr.h> + +#include <linux/irq.h> + +#define THREAD_NAME "kvoyagerd" + +/* external variables */ +int kvoyagerd_running = 0; +DECLARE_MUTEX_LOCKED(kvoyagerd_sem); + +static int thread(void *); + +static __u8 set_timeout = 0; + +/* Start the machine monitor thread. Return 1 if OK, 0 if fail */ +static int __init +voyager_thread_start(void) +{ + if(kernel_thread(thread, NULL, CLONE_KERNEL) < 0) { + /* This is serious, but not fatal */ + printk(KERN_ERR "Voyager: Failed to create system monitor thread!!!\n"); + return 1; + } + return 0; +} + +static int +execute(const char *string) +{ + int ret; + + char *envp[] = { + "HOME=/", + "TERM=linux", + "PATH=/sbin:/usr/sbin:/bin:/usr/bin", + NULL, + }; + char *argv[] = { + "/bin/bash", + "-c", + (char *)string, + NULL, + }; + + if ((ret = call_usermodehelper(argv[0], argv, envp, 1)) != 0) { + printk(KERN_ERR "Voyager failed to run \"%s\": %i\n", + string, ret); + } + return ret; +} + +static void +check_from_kernel(void) +{ + if(voyager_status.switch_off) { + + /* FIXME: This should be configureable via proc */ + execute("umask 600; echo 0 > /etc/initrunlvl; kill -HUP 1"); + } else if(voyager_status.power_fail) { + VDEBUG(("Voyager daemon detected AC power failure\n")); + + /* FIXME: This should be configureable via proc */ + execute("umask 600; echo F > /etc/powerstatus; kill -PWR 1"); + set_timeout = 1; + } +} + +static void +check_continuing_condition(void) +{ + if(voyager_status.power_fail) { + __u8 data; + voyager_cat_psi(VOYAGER_PSI_SUBREAD, + VOYAGER_PSI_AC_FAIL_REG, &data); + if((data & 0x1f) == 0) { + /* all power restored */ + printk(KERN_NOTICE "VOYAGER AC power restored, cancelling shutdown\n"); + /* FIXME: should be user configureable */ + execute("umask 600; echo O > /etc/powerstatus; kill -PWR 1"); + set_timeout = 0; + } + } +} + +static void +wakeup(unsigned long unused) +{ + up(&kvoyagerd_sem); +} + +static int +thread(void *unused) +{ + struct timer_list wakeup_timer; + + kvoyagerd_running = 1; + + reparent_to_init(); + daemonize(THREAD_NAME); + + set_timeout = 0; + + init_timer(&wakeup_timer); + + sigfillset(¤t->blocked); + current->signal->tty = NULL; + + printk(KERN_NOTICE "Voyager starting monitor thread\n"); + + for(;;) { + down_interruptible(&kvoyagerd_sem); + VDEBUG(("Voyager Daemon awoken\n")); + if(voyager_status.request_from_kernel == 0) { + /* probably awoken from timeout */ + check_continuing_condition(); + } else { + check_from_kernel(); + voyager_status.request_from_kernel = 0; + } + if(set_timeout) { + del_timer(&wakeup_timer); + wakeup_timer.expires = HZ + jiffies; + wakeup_timer.function = wakeup; + add_timer(&wakeup_timer); + } + } +} + +static void __exit +voyager_thread_stop(void) +{ + /* FIXME: do nothing at the moment */ +} + +module_init(voyager_thread_start); +//module_exit(voyager_thread_stop); |