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Diffstat (limited to 'arch/powerpc/include/asm/processor.h')
| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h new file mode 100644 index 000000000000..101ed87f7d84 --- /dev/null +++ b/arch/powerpc/include/asm/processor.h @@ -0,0 +1,314 @@ +#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 <asm/reg.h> + +#ifdef CONFIG_VSX +#define TS_FPRWIDTH 2 +#else +#define TS_FPRWIDTH 1 +#endif + +#ifndef __ASSEMBLY__ +#include <linux/compiler.h> +#include <asm/ptrace.h> +#include <asm/types.h> + +/* 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_vsx; +extern struct task_struct *last_task_used_spe; + +#ifdef CONFIG_PPC32 + +#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START +#error User TASK_SIZE overlaps with KERNEL_START address +#endif +#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; + +#define TS_FPROFFSET 0 +#define TS_VSRLOWOFFSET 1 +#define TS_FPR(i) fpr[i][TS_FPROFFSET] + +struct thread_struct { + unsigned long ksp; /* Kernel stack pointer */ + unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */ + +#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 + /* FP and VSX 0-31 register set */ + double fpr[32][TS_FPRWIDTH]; + struct { + + 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_VSX + /* VSR status */ + int used_vsr; /* set if process has used altivec */ +#endif /* CONFIG_VSX */ +#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) +#define INIT_SP_LIMIT \ + (_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack) + + +#ifdef CONFIG_PPC32 +#define INIT_THREAD { \ + .ksp = INIT_SP, \ + .ksp_limit = INIT_SP_LIMIT, \ + .fs = KERNEL_DS, \ + .pgdir = swapper_pg_dir, \ + .fpexc_mode = MSR_FE0 | MSR_FE1, \ +} +#else +#define INIT_THREAD { \ + .ksp = INIT_SP, \ + .ksp_limit = INIT_SP_LIMIT, \ + .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) + +#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.regs) + +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 */ |
