215 lines
4.6 KiB
C
215 lines
4.6 KiB
C
/*
|
|
* include/asm-sh/processor.h
|
|
*
|
|
* Copyright (C) 1999, 2000 Niibe Yutaka
|
|
* Copyright (C) 2002, 2003 Paul Mundt
|
|
*/
|
|
|
|
#ifndef __ASM_SH_PROCESSOR_32_H
|
|
#define __ASM_SH_PROCESSOR_32_H
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/page.h>
|
|
#include <asm/types.h>
|
|
#include <asm/hw_breakpoint.h>
|
|
|
|
/*
|
|
* Default implementation of macro that returns current
|
|
* instruction pointer ("program counter").
|
|
*/
|
|
#define current_text_addr() ({ void *pc; __asm__("mova 1f, %0\n.align 2\n1:":"=z" (pc)); pc; })
|
|
|
|
/* Core Processor Version Register */
|
|
#define CCN_PVR 0xff000030
|
|
#define CCN_CVR 0xff000040
|
|
#define CCN_PRR 0xff000044
|
|
|
|
/*
|
|
* User space process size: 2GB.
|
|
*
|
|
* Since SH7709 and SH7750 have "area 7", we can't use 0x7c000000--0x7fffffff
|
|
*/
|
|
#define TASK_SIZE 0x7c000000UL
|
|
|
|
#define STACK_TOP TASK_SIZE
|
|
#define STACK_TOP_MAX STACK_TOP
|
|
|
|
/* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's.
|
|
*/
|
|
#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
|
|
|
|
/*
|
|
* Bit of SR register
|
|
*
|
|
* FD-bit:
|
|
* When it's set, it means the processor doesn't have right to use FPU,
|
|
* and it results exception when the floating operation is executed.
|
|
*
|
|
* IMASK-bit:
|
|
* Interrupt level mask
|
|
*/
|
|
#define SR_DSP 0x00001000
|
|
#define SR_IMASK 0x000000f0
|
|
#define SR_FD 0x00008000
|
|
#define SR_MD 0x40000000
|
|
|
|
/*
|
|
* DSP structure and data
|
|
*/
|
|
struct sh_dsp_struct {
|
|
unsigned long dsp_regs[14];
|
|
long status;
|
|
};
|
|
|
|
/*
|
|
* FPU structure and data
|
|
*/
|
|
|
|
struct sh_fpu_hard_struct {
|
|
unsigned long fp_regs[16];
|
|
unsigned long xfp_regs[16];
|
|
unsigned long fpscr;
|
|
unsigned long fpul;
|
|
|
|
long status; /* software status information */
|
|
};
|
|
|
|
/* Dummy fpu emulator */
|
|
struct sh_fpu_soft_struct {
|
|
unsigned long fp_regs[16];
|
|
unsigned long xfp_regs[16];
|
|
unsigned long fpscr;
|
|
unsigned long fpul;
|
|
|
|
unsigned char lookahead;
|
|
unsigned long entry_pc;
|
|
};
|
|
|
|
union thread_xstate {
|
|
struct sh_fpu_hard_struct hardfpu;
|
|
struct sh_fpu_soft_struct softfpu;
|
|
};
|
|
|
|
struct thread_struct {
|
|
/* Saved registers when thread is descheduled */
|
|
unsigned long sp;
|
|
unsigned long pc;
|
|
|
|
/* Various thread flags, see SH_THREAD_xxx */
|
|
unsigned long flags;
|
|
|
|
/* Save middle states of ptrace breakpoints */
|
|
struct perf_event *ptrace_bps[HBP_NUM];
|
|
|
|
#ifdef CONFIG_SH_DSP
|
|
/* Dsp status information */
|
|
struct sh_dsp_struct dsp_status;
|
|
#endif
|
|
|
|
/* Extended processor state */
|
|
union thread_xstate *xstate;
|
|
};
|
|
|
|
#define INIT_THREAD { \
|
|
.sp = sizeof(init_stack) + (long) &init_stack, \
|
|
.flags = 0, \
|
|
}
|
|
|
|
/* Forward declaration, a strange C thing */
|
|
struct task_struct;
|
|
|
|
extern void start_thread(struct pt_regs *regs, unsigned long new_pc, unsigned long new_sp);
|
|
|
|
/* Free all resources held by a thread. */
|
|
extern void release_thread(struct task_struct *);
|
|
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
|
void prepare_to_copy(struct task_struct *tsk);
|
|
|
|
/*
|
|
* create a kernel thread without removing it from tasklists
|
|
*/
|
|
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
|
|
|
|
/* Copy and release all segment info associated with a VM */
|
|
#define copy_segments(p, mm) do { } while(0)
|
|
#define release_segments(mm) do { } while(0)
|
|
|
|
/*
|
|
* FPU lazy state save handling.
|
|
*/
|
|
|
|
static __inline__ void disable_fpu(void)
|
|
{
|
|
unsigned long __dummy;
|
|
|
|
/* Set FD flag in SR */
|
|
__asm__ __volatile__("stc sr, %0\n\t"
|
|
"or %1, %0\n\t"
|
|
"ldc %0, sr"
|
|
: "=&r" (__dummy)
|
|
: "r" (SR_FD));
|
|
}
|
|
|
|
static __inline__ void enable_fpu(void)
|
|
{
|
|
unsigned long __dummy;
|
|
|
|
/* Clear out FD flag in SR */
|
|
__asm__ __volatile__("stc sr, %0\n\t"
|
|
"and %1, %0\n\t"
|
|
"ldc %0, sr"
|
|
: "=&r" (__dummy)
|
|
: "r" (~SR_FD));
|
|
}
|
|
|
|
/* Double presision, NANS as NANS, rounding to nearest, no exceptions */
|
|
#define FPSCR_INIT 0x00080000
|
|
|
|
#define FPSCR_CAUSE_MASK 0x0001f000 /* Cause bits */
|
|
#define FPSCR_FLAG_MASK 0x0000007c /* Flag bits */
|
|
|
|
/*
|
|
* Return saved PC of a blocked thread.
|
|
*/
|
|
#define thread_saved_pc(tsk) (tsk->thread.pc)
|
|
|
|
void show_trace(struct task_struct *tsk, unsigned long *sp,
|
|
struct pt_regs *regs);
|
|
|
|
#ifdef CONFIG_DUMP_CODE
|
|
void show_code(struct pt_regs *regs);
|
|
#else
|
|
static inline void show_code(struct pt_regs *regs)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
extern unsigned long get_wchan(struct task_struct *p);
|
|
|
|
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
|
|
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[15])
|
|
|
|
#if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH4)
|
|
|
|
#define PREFETCH_STRIDE L1_CACHE_BYTES
|
|
#define ARCH_HAS_PREFETCH
|
|
#define ARCH_HAS_PREFETCHW
|
|
|
|
static inline void prefetch(const void *x)
|
|
{
|
|
__builtin_prefetch(x, 0, 3);
|
|
}
|
|
|
|
static inline void prefetchw(const void *x)
|
|
{
|
|
__builtin_prefetch(x, 1, 3);
|
|
}
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __ASM_SH_PROCESSOR_32_H */
|