#ifndef _ASM_POWERPC_PROCESSOR_H #define _ASM_POWERPC_PROCESSOR_H /* * Copyright (C) 2001 PPC 64 Team, IBM Corp * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include #ifndef __ASSEMBLY__ #include #include #include /* We do _not_ want to define new machine types at all, those must die * in favor of using the device-tree * -- BenH. */ /* PREP sub-platform types see residual.h for these */ #define _PREP_Motorola 0x01 /* motorola prep */ #define _PREP_Firm 0x02 /* firmworks prep */ #define _PREP_IBM 0x00 /* ibm prep */ #define _PREP_Bull 0x03 /* bull prep */ /* CHRP sub-platform types. These are arbitrary */ #define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */ #define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */ #define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */ #define _CHRP_briq 0x07 /* TotalImpact's briQ */ #if defined(__KERNEL__) && defined(CONFIG_PPC32) extern int _chrp_type; #ifdef CONFIG_PPC_PREP /* what kind of prep workstation we are */ extern int _prep_type; #endif /* CONFIG_PPC_PREP */ #endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */ /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */ #define current_text_addr() ({ __label__ _l; _l: &&_l;}) /* Macros for adjusting thread priority (hardware multi-threading) */ #define HMT_very_low() asm volatile("or 31,31,31 # very low priority") #define HMT_low() asm volatile("or 1,1,1 # low priority") #define HMT_medium_low() asm volatile("or 6,6,6 # medium low priority") #define HMT_medium() asm volatile("or 2,2,2 # medium priority") #define HMT_medium_high() asm volatile("or 5,5,5 # medium high priority") #define HMT_high() asm volatile("or 3,3,3 # high priority") #ifdef __KERNEL__ extern int have_of; struct task_struct; void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp); void release_thread(struct task_struct *); /* Prepare to copy thread state - unlazy all lazy status */ extern void prepare_to_copy(struct task_struct *tsk); /* Create a new kernel thread. */ extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); /* Lazy FPU handling on uni-processor */ extern struct task_struct *last_task_used_math; extern struct task_struct *last_task_used_altivec; extern struct task_struct *last_task_used_spe; #ifdef CONFIG_PPC32 #define TASK_SIZE (CONFIG_TASK_SIZE) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */ #define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3) #endif #ifdef CONFIG_PPC64 /* 64-bit user address space is 44-bits (16TB user VM) */ #define TASK_SIZE_USER64 (0x0000100000000000UL) /* * 32-bit user address space is 4GB - 1 page * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT */ #define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE)) #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \ TASK_SIZE_USER32 : TASK_SIZE_USER64) #define TASK_SIZE TASK_SIZE_OF(current) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */ #define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4)) #define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4)) #define TASK_UNMAPPED_BASE ((test_thread_flag(TIF_32BIT)) ? \ TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 ) #endif #ifdef __KERNEL__ #ifdef __powerpc64__ #define STACK_TOP_USER64 TASK_SIZE_USER64 #define STACK_TOP_USER32 TASK_SIZE_USER32 #define STACK_TOP (test_thread_flag(TIF_32BIT) ? \ STACK_TOP_USER32 : STACK_TOP_USER64) #define STACK_TOP_MAX STACK_TOP_USER64 #else /* __powerpc64__ */ #define STACK_TOP TASK_SIZE #define STACK_TOP_MAX STACK_TOP #endif /* __powerpc64__ */ #endif /* __KERNEL__ */ typedef struct { unsigned long seg; } mm_segment_t; struct thread_struct { unsigned long ksp; /* Kernel stack pointer */ #ifdef CONFIG_PPC64 unsigned long ksp_vsid; #endif struct pt_regs *regs; /* Pointer to saved register state */ mm_segment_t fs; /* for get_fs() validation */ #ifdef CONFIG_PPC32 void *pgdir; /* root of page-table tree */ #endif #if defined(CONFIG_4xx) || defined (CONFIG_BOOKE) unsigned long dbcr0; /* debug control register values */ unsigned long dbcr1; #endif double fpr[32]; /* Complete floating point set */ struct { /* fpr ... fpscr must be contiguous */ unsigned int pad; unsigned int val; /* Floating point status */ } fpscr; int fpexc_mode; /* floating-point exception mode */ unsigned int align_ctl; /* alignment handling control */ #ifdef CONFIG_PPC64 unsigned long start_tb; /* Start purr when proc switched in */ unsigned long accum_tb; /* Total accumilated purr for process */ #endif unsigned long dabr; /* Data address breakpoint register */ #ifdef CONFIG_ALTIVEC /* Complete AltiVec register set */ vector128 vr[32] __attribute__((aligned(16))); /* AltiVec status */ vector128 vscr __attribute__((aligned(16))); unsigned long vrsave; int used_vr; /* set if process has used altivec */ #endif /* CONFIG_ALTIVEC */ #ifdef CONFIG_SPE unsigned long evr[32]; /* upper 32-bits of SPE regs */ u64 acc; /* Accumulator */ unsigned long spefscr; /* SPE & eFP status */ int used_spe; /* set if process has used spe */ #endif /* CONFIG_SPE */ }; #define ARCH_MIN_TASKALIGN 16 #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) #ifdef CONFIG_PPC32 #define INIT_THREAD { \ .ksp = INIT_SP, \ .fs = KERNEL_DS, \ .pgdir = swapper_pg_dir, \ .fpexc_mode = MSR_FE0 | MSR_FE1, \ } #else #define INIT_THREAD { \ .ksp = INIT_SP, \ .regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \ .fs = KERNEL_DS, \ .fpr = {0}, \ .fpscr = { .val = 0, }, \ .fpexc_mode = 0, \ } #endif /* * Return saved PC of a blocked thread. For now, this is the "user" PC */ #define thread_saved_pc(tsk) \ ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0) unsigned long get_wchan(struct task_struct *p); #define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0) #define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0) /* Get/set floating-point exception mode */ #define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr)) #define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val)) extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr); extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val); #define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr)) #define SET_ENDIAN(tsk, val) set_endian((tsk), (val)) extern int get_endian(struct task_struct *tsk, unsigned long adr); extern int set_endian(struct task_struct *tsk, unsigned int val); #define GET_UNALIGN_CTL(tsk, adr) get_unalign_ctl((tsk), (adr)) #define SET_UNALIGN_CTL(tsk, val) set_unalign_ctl((tsk), (val)) extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr); extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val); static inline unsigned int __unpack_fe01(unsigned long msr_bits) { return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8); } static inline unsigned long __pack_fe01(unsigned int fpmode) { return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1); } #ifdef CONFIG_PPC64 #define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0) #else #define cpu_relax() barrier() #endif /* Check that a certain kernel stack pointer is valid in task_struct p */ int validate_sp(unsigned long sp, struct task_struct *p, unsigned long nbytes); /* * Prefetch macros. */ #define ARCH_HAS_PREFETCH #define ARCH_HAS_PREFETCHW #define ARCH_HAS_SPINLOCK_PREFETCH static inline void prefetch(const void *x) { if (unlikely(!x)) return; __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x)); } static inline void prefetchw(const void *x) { if (unlikely(!x)) return; __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x)); } #define spin_lock_prefetch(x) prefetchw(x) #ifdef CONFIG_PPC64 #define HAVE_ARCH_PICK_MMAP_LAYOUT #endif #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ #endif /* _ASM_POWERPC_PROCESSOR_H */