mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 01:04:19 +08:00
269 lines
7.0 KiB
C
269 lines
7.0 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994 Waldorf GMBH
|
|
* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
|
|
* Copyright (C) 1996 Paul M. Antoine
|
|
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
|
|
*/
|
|
#ifndef _ASM_PROCESSOR_H
|
|
#define _ASM_PROCESSOR_H
|
|
|
|
#include <linux/cpumask.h>
|
|
#include <linux/threads.h>
|
|
|
|
#include <asm/cachectl.h>
|
|
#include <asm/cpu.h>
|
|
#include <asm/cpu-info.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/prefetch.h>
|
|
#include <asm/system.h>
|
|
|
|
/*
|
|
* Return current * instruction pointer ("program counter").
|
|
*/
|
|
#define current_text_addr() ({ __label__ _l; _l: &&_l;})
|
|
|
|
/*
|
|
* System setup and hardware flags..
|
|
*/
|
|
extern void (*cpu_wait)(void);
|
|
|
|
extern unsigned int vced_count, vcei_count;
|
|
|
|
#ifdef CONFIG_32BIT
|
|
/*
|
|
* User space process size: 2GB. This is hardcoded into a few places,
|
|
* so don't change it unless you know what you are doing.
|
|
*/
|
|
#define TASK_SIZE 0x7fff8000UL
|
|
|
|
/*
|
|
* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's.
|
|
*/
|
|
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
|
|
#endif
|
|
|
|
#ifdef CONFIG_64BIT
|
|
/*
|
|
* User space process size: 1TB. This is hardcoded into a few places,
|
|
* so don't change it unless you know what you are doing. TASK_SIZE
|
|
* is limited to 1TB by the R4000 architecture; R10000 and better can
|
|
* support 16TB; the architectural reserve for future expansion is
|
|
* 8192EB ...
|
|
*/
|
|
#define TASK_SIZE32 0x7fff8000UL
|
|
#define TASK_SIZE 0x10000000000UL
|
|
|
|
/*
|
|
* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's.
|
|
*/
|
|
#define TASK_UNMAPPED_BASE ((current->thread.mflags & MF_32BIT_ADDR) ? \
|
|
PAGE_ALIGN(TASK_SIZE32 / 3) : PAGE_ALIGN(TASK_SIZE / 3))
|
|
#endif
|
|
|
|
#define NUM_FPU_REGS 32
|
|
|
|
typedef __u64 fpureg_t;
|
|
|
|
/*
|
|
* It would be nice to add some more fields for emulator statistics, but there
|
|
* are a number of fixed offsets in offset.h and elsewhere that would have to
|
|
* be recalculated by hand. So the additional information will be private to
|
|
* the FPU emulator for now. See asm-mips/fpu_emulator.h.
|
|
*/
|
|
|
|
struct mips_fpu_struct {
|
|
fpureg_t fpr[NUM_FPU_REGS];
|
|
unsigned int fcr31;
|
|
};
|
|
|
|
#define NUM_DSP_REGS 6
|
|
|
|
typedef __u32 dspreg_t;
|
|
|
|
struct mips_dsp_state {
|
|
dspreg_t dspr[NUM_DSP_REGS];
|
|
unsigned int dspcontrol;
|
|
};
|
|
|
|
#define INIT_CPUMASK { \
|
|
{0,} \
|
|
}
|
|
|
|
typedef struct {
|
|
unsigned long seg;
|
|
} mm_segment_t;
|
|
|
|
#define ARCH_MIN_TASKALIGN 8
|
|
|
|
struct mips_abi;
|
|
|
|
/*
|
|
* If you change thread_struct remember to change the #defines below too!
|
|
*/
|
|
struct thread_struct {
|
|
/* Saved main processor registers. */
|
|
unsigned long reg16;
|
|
unsigned long reg17, reg18, reg19, reg20, reg21, reg22, reg23;
|
|
unsigned long reg29, reg30, reg31;
|
|
|
|
/* Saved cp0 stuff. */
|
|
unsigned long cp0_status;
|
|
|
|
/* Saved fpu/fpu emulator stuff. */
|
|
struct mips_fpu_struct fpu;
|
|
#ifdef CONFIG_MIPS_MT_FPAFF
|
|
/* Emulated instruction count */
|
|
unsigned long emulated_fp;
|
|
/* Saved per-thread scheduler affinity mask */
|
|
cpumask_t user_cpus_allowed;
|
|
#endif /* CONFIG_MIPS_MT_FPAFF */
|
|
|
|
/* Saved state of the DSP ASE, if available. */
|
|
struct mips_dsp_state dsp;
|
|
|
|
/* Other stuff associated with the thread. */
|
|
unsigned long cp0_badvaddr; /* Last user fault */
|
|
unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */
|
|
unsigned long error_code;
|
|
unsigned long trap_no;
|
|
#define MF_FIXADE 1 /* Fix address errors in software */
|
|
#define MF_LOGADE 2 /* Log address errors to syslog */
|
|
#define MF_32BIT_REGS 4 /* also implies 16/32 fprs */
|
|
#define MF_32BIT_ADDR 8 /* 32-bit address space (o32/n32) */
|
|
#define MF_FPUBOUND 0x10 /* thread bound to FPU-full CPU set */
|
|
unsigned long mflags;
|
|
unsigned long irix_trampoline; /* Wheee... */
|
|
unsigned long irix_oldctx;
|
|
struct mips_abi *abi;
|
|
};
|
|
|
|
#define MF_ABI_MASK (MF_32BIT_REGS | MF_32BIT_ADDR)
|
|
#define MF_O32 (MF_32BIT_REGS | MF_32BIT_ADDR)
|
|
#define MF_N32 MF_32BIT_ADDR
|
|
#define MF_N64 0
|
|
|
|
#ifdef CONFIG_MIPS_MT_FPAFF
|
|
#define FPAFF_INIT \
|
|
.emulated_fp = 0, \
|
|
.user_cpus_allowed = INIT_CPUMASK,
|
|
#else
|
|
#define FPAFF_INIT
|
|
#endif /* CONFIG_MIPS_MT_FPAFF */
|
|
|
|
#define INIT_THREAD { \
|
|
/* \
|
|
* Saved main processor registers \
|
|
*/ \
|
|
.reg16 = 0, \
|
|
.reg17 = 0, \
|
|
.reg18 = 0, \
|
|
.reg19 = 0, \
|
|
.reg20 = 0, \
|
|
.reg21 = 0, \
|
|
.reg22 = 0, \
|
|
.reg23 = 0, \
|
|
.reg29 = 0, \
|
|
.reg30 = 0, \
|
|
.reg31 = 0, \
|
|
/* \
|
|
* Saved cp0 stuff \
|
|
*/ \
|
|
.cp0_status = 0, \
|
|
/* \
|
|
* Saved FPU/FPU emulator stuff \
|
|
*/ \
|
|
.fpu = { \
|
|
.fpr = {0,}, \
|
|
.fcr31 = 0, \
|
|
}, \
|
|
/* \
|
|
* FPU affinity state (null if not FPAFF) \
|
|
*/ \
|
|
FPAFF_INIT \
|
|
/* \
|
|
* Saved DSP stuff \
|
|
*/ \
|
|
.dsp = { \
|
|
.dspr = {0, }, \
|
|
.dspcontrol = 0, \
|
|
}, \
|
|
/* \
|
|
* Other stuff associated with the process \
|
|
*/ \
|
|
.cp0_badvaddr = 0, \
|
|
.cp0_baduaddr = 0, \
|
|
.error_code = 0, \
|
|
.trap_no = 0, \
|
|
/* \
|
|
* For now the default is to fix address errors \
|
|
*/ \
|
|
.mflags = MF_FIXADE, \
|
|
.irix_trampoline = 0, \
|
|
.irix_oldctx = 0, \
|
|
}
|
|
|
|
struct task_struct;
|
|
|
|
/* Free all resources held by a thread. */
|
|
#define release_thread(thread) do { } while(0)
|
|
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
|
#define prepare_to_copy(tsk) do { } while (0)
|
|
|
|
extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
|
|
|
|
extern unsigned long thread_saved_pc(struct task_struct *tsk);
|
|
|
|
/*
|
|
* Do necessary setup to start up a newly executed thread.
|
|
*/
|
|
extern void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp);
|
|
|
|
unsigned long get_wchan(struct task_struct *p);
|
|
|
|
#define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
|
|
#define task_pt_regs(tsk) ((struct pt_regs *)__KSTK_TOS(tsk) - 1)
|
|
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->cp0_epc)
|
|
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])
|
|
#define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status)
|
|
|
|
#define cpu_relax() barrier()
|
|
|
|
/*
|
|
* Return_address is a replacement for __builtin_return_address(count)
|
|
* which on certain architectures cannot reasonably be implemented in GCC
|
|
* (MIPS, Alpha) or is unuseable with -fomit-frame-pointer (i386).
|
|
* Note that __builtin_return_address(x>=1) is forbidden because GCC
|
|
* aborts compilation on some CPUs. It's simply not possible to unwind
|
|
* some CPU's stackframes.
|
|
*
|
|
* __builtin_return_address works only for non-leaf functions. We avoid the
|
|
* overhead of a function call by forcing the compiler to save the return
|
|
* address register on the stack.
|
|
*/
|
|
#define return_address() ({__asm__ __volatile__("":::"$31");__builtin_return_address(0);})
|
|
|
|
#ifdef CONFIG_CPU_HAS_PREFETCH
|
|
|
|
#define ARCH_HAS_PREFETCH
|
|
|
|
static inline void prefetch(const void *addr)
|
|
{
|
|
__asm__ __volatile__(
|
|
" .set mips4 \n"
|
|
" pref %0, (%1) \n"
|
|
" .set mips0 \n"
|
|
:
|
|
: "i" (Pref_Load), "r" (addr));
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif /* _ASM_PROCESSOR_H */
|