/* * linux/arch/h8300/kernel/setup.c * * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com} * Copyright (C) 1999,2000 Greg Ungerer (gerg@snapgear.com) * Copyright (C) 1998,1999 D. Jeff Dionne * Copyright (C) 1998 Kenneth Albanowski * Copyright (C) 1995 Hamish Macdonald * Copyright (C) 2000 Lineo Inc. (www.lineo.com) * Copyright (C) 2001 Lineo, Inc. * * H8/300 porting Yoshinori Sato */ /* * This file handles the architecture-dependent parts of system setup */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_BLK_DEV_INITRD #include #endif #if defined(__H8300H__) #define CPU "H8/300H" #include #endif #if defined(__H8300S__) #define CPU "H8S" #include #endif #define STUBSIZE 0xc000; unsigned long rom_length; unsigned long memory_start; unsigned long memory_end; char command_line[COMMAND_LINE_SIZE]; extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end; extern int _ramstart, _ramend; extern char _target_name[]; extern void h8300_gpio_init(void); #if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) \ && defined(CONFIG_GDB_MAGICPRINT) /* printk with gdb service */ static void gdb_console_output(struct console *c, const char *msg, unsigned len) { for (; len > 0; len--) { asm("mov.w %0,r2\n\t" "jsr @0xc4"::"r"(*msg++):"er2"); } } /* * Setup initial baud/bits/parity. We do two things here: * - construct a cflag setting for the first rs_open() * - initialize the serial port * Return non-zero if we didn't find a serial port. */ static int __init gdb_console_setup(struct console *co, char *options) { return 0; } static const struct console gdb_console = { .name = "gdb_con", .write = gdb_console_output, .device = NULL, .setup = gdb_console_setup, .flags = CON_PRINTBUFFER, .index = -1, }; #endif void __init setup_arch(char **cmdline_p) { int bootmap_size; memory_start = (unsigned long) &_ramstart; /* allow for ROMFS on the end of the kernel */ if (memcmp((void *)memory_start, "-rom1fs-", 8) == 0) { #if defined(CONFIG_BLK_DEV_INITRD) initrd_start = memory_start; initrd_end = memory_start += be32_to_cpu(((unsigned long *) (memory_start))[2]); #else memory_start += be32_to_cpu(((unsigned long *) memory_start)[2]); #endif } memory_start = PAGE_ALIGN(memory_start); #if !defined(CONFIG_BLKDEV_RESERVE) memory_end = (unsigned long) &_ramend; /* by now the stack is part of the init task */ #if defined(CONFIG_GDB_DEBUG) memory_end -= STUBSIZE; #endif #else if ((memory_end < CONFIG_BLKDEV_RESERVE_ADDRESS) && (memory_end > CONFIG_BLKDEV_RESERVE_ADDRESS) /* overlap userarea */ memory_end = CONFIG_BLKDEV_RESERVE_ADDRESS; #endif init_mm.start_code = (unsigned long) &_stext; init_mm.end_code = (unsigned long) &_etext; init_mm.end_data = (unsigned long) &_edata; init_mm.brk = (unsigned long) 0; #if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) && defined(CONFIG_GDB_MAGICPRINT) register_console((struct console *)&gdb_console); #endif printk(KERN_INFO "\r\n\nuClinux " CPU "\n"); printk(KERN_INFO "Target Hardware: %s\n",_target_name); printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); printk(KERN_INFO "H8/300 series support by Yoshinori Sato \n"); #ifdef DEBUG printk(KERN_DEBUG "KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x " "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext, (int) &_sdata, (int) &_edata, (int) &_sbss, (int) &_ebss); printk(KERN_DEBUG "KERNEL -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x " "STACK=0x%06x-0x%06x\n", (int) &_ebss, (int) memory_start, (int) memory_start, (int) memory_end, (int) memory_end, (int) &_ramend); #endif #ifdef CONFIG_DEFAULT_CMDLINE /* set from default command line */ if (*command_line == '\0') strcpy(command_line,CONFIG_KERNEL_COMMAND); #endif /* Keep a copy of command line */ *cmdline_p = &command_line[0]; memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); saved_command_line[COMMAND_LINE_SIZE-1] = 0; #ifdef DEBUG if (strlen(*cmdline_p)) printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p); #endif /* * give all the memory to the bootmap allocator, tell it to put the * boot mem_map at the start of memory */ bootmap_size = init_bootmem_node( NODE_DATA(0), memory_start >> PAGE_SHIFT, /* map goes here */ PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */ memory_end >> PAGE_SHIFT); /* * free the usable memory, we have to make sure we do not free * the bootmem bitmap so we then reserve it after freeing it :-) */ free_bootmem(memory_start, memory_end - memory_start); reserve_bootmem(memory_start, bootmap_size); /* * get kmalloc into gear */ paging_init(); h8300_gpio_init(); #if defined(CONFIG_H8300_AKI3068NET) && defined(CONFIG_IDE) { #define AREABIT(addr) (1 << (((addr) >> 21) & 7)) /* setup BSC */ volatile unsigned char *abwcr = (volatile unsigned char *)ABWCR; volatile unsigned char *cscr = (volatile unsigned char *)CSCR; *abwcr &= ~(AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)); *cscr |= (AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)) | 0x0f; } #endif #ifdef DEBUG printk(KERN_DEBUG "Done setup_arch\n"); #endif } /* * Get CPU information for use by the procfs. */ static int show_cpuinfo(struct seq_file *m, void *v) { char *cpu; int mode; u_long clockfreq; cpu = CPU; mode = *(volatile unsigned char *)MDCR & 0x07; clockfreq = CONFIG_CPU_CLOCK; seq_printf(m, "CPU:\t\t%s (mode:%d)\n" "Clock:\t\t%lu.%1luMHz\n" "BogoMips:\t%lu.%02lu\n" "Calibration:\t%lu loops\n", cpu,mode, clockfreq/1000,clockfreq%1000, (loops_per_jiffy*HZ)/500000,((loops_per_jiffy*HZ)/5000)%100, (loops_per_jiffy*HZ)); return 0; } static void *c_start(struct seq_file *m, loff_t *pos) { return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; } static void *c_next(struct seq_file *m, void *v, loff_t *pos) { ++*pos; return c_start(m, pos); } static void c_stop(struct seq_file *m, void *v) { } struct seq_operations cpuinfo_op = { .start = c_start, .next = c_next, .stop = c_stop, .show = show_cpuinfo, };