130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
|
/* $Id: processor.h,v 1.83 2001/10/08 09:32:13 davem Exp $
|
||
|
|
* include/asm-sparc/processor.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_SPARC_PROCESSOR_H
|
||
|
|
#define __ASM_SPARC_PROCESSOR_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Sparc32 implementation of macro that returns current
|
||
|
|
* instruction pointer ("program counter").
|
||
|
|
*/
|
||
|
|
#define current_text_addr() ({ void *pc; __asm__("sethi %%hi(1f), %0; or %0, %%lo(1f), %0;\n1:" : "=r" (pc)); pc; })
|
||
|
|
|
||
|
|
#include <linux/a.out.h>
|
||
|
|
|
||
|
|
#include <asm/psr.h>
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
#include <asm/head.h>
|
||
|
|
#include <asm/signal.h>
|
||
|
|
#include <asm/btfixup.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The sparc has no problems with write protection
|
||
|
|
*/
|
||
|
|
#define wp_works_ok 1
|
||
|
|
#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
|
||
|
|
|
||
|
|
/* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too...
|
||
|
|
* That one page is used to protect kernel from intruders, so that
|
||
|
|
* we can make our access_ok test faster
|
||
|
|
*/
|
||
|
|
#define TASK_SIZE PAGE_OFFSET
|
||
|
|
|
||
|
|
struct task_struct;
|
||
|
|
|
||
|
|
#ifdef __KERNEL__
|
||
|
|
struct fpq {
|
||
|
|
unsigned long *insn_addr;
|
||
|
|
unsigned long insn;
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
int seg;
|
||
|
|
} mm_segment_t;
|
||
|
|
|
||
|
|
/* The Sparc processor specific thread struct. */
|
||
|
|
struct thread_struct {
|
||
|
|
struct pt_regs *kregs;
|
||
|
|
unsigned int _pad1;
|
||
|
|
|
||
|
|
/* Special child fork kpsr/kwim values. */
|
||
|
|
unsigned long fork_kpsr __attribute__ ((aligned (8)));
|
||
|
|
unsigned long fork_kwim;
|
||
|
|
|
||
|
|
/* Floating point regs */
|
||
|
|
unsigned long float_regs[32] __attribute__ ((aligned (8)));
|
||
|
|
unsigned long fsr;
|
||
|
|
unsigned long fpqdepth;
|
||
|
|
struct fpq fpqueue[16];
|
||
|
|
unsigned long flags;
|
||
|
|
mm_segment_t current_ds;
|
||
|
|
struct exec core_exec; /* just what it says. */
|
||
|
|
int new_signal;
|
||
|
|
};
|
||
|
|
|
||
|
|
#define SPARC_FLAG_KTHREAD 0x1 /* task is a kernel thread */
|
||
|
|
#define SPARC_FLAG_UNALIGNED 0x2 /* is allowed to do unaligned accesses */
|
||
|
|
|
||
|
|
#define INIT_THREAD { \
|
||
|
|
.flags = SPARC_FLAG_KTHREAD, \
|
||
|
|
.current_ds = KERNEL_DS, \
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Return saved PC of a blocked thread. */
|
||
|
|
extern unsigned long thread_saved_pc(struct task_struct *t);
|
||
|
|
|
||
|
|
/* Do necessary setup to start up a newly executed thread. */
|
||
|
|
extern __inline__ void start_thread(struct pt_regs * regs, unsigned long pc,
|
||
|
|
unsigned long sp)
|
||
|
|
{
|
||
|
|
register unsigned long zero asm("g1");
|
||
|
|
|
||
|
|
regs->psr = (regs->psr & (PSR_CWP)) | PSR_S;
|
||
|
|
regs->pc = ((pc & (~3)) - 4);
|
||
|
|
regs->npc = regs->pc + 4;
|
||
|
|
regs->y = 0;
|
||
|
|
zero = 0;
|
||
|
|
__asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t"
|
||
|
|
"std\t%%g0, [%0 + %3 + 0x08]\n\t"
|
||
|
|
"std\t%%g0, [%0 + %3 + 0x10]\n\t"
|
||
|
|
"std\t%%g0, [%0 + %3 + 0x18]\n\t"
|
||
|
|
"std\t%%g0, [%0 + %3 + 0x20]\n\t"
|
||
|
|
"std\t%%g0, [%0 + %3 + 0x28]\n\t"
|
||
|
|
"std\t%%g0, [%0 + %3 + 0x30]\n\t"
|
||
|
|
"st\t%1, [%0 + %3 + 0x38]\n\t"
|
||
|
|
"st\t%%g0, [%0 + %3 + 0x3c]"
|
||
|
|
: /* no outputs */
|
||
|
|
: "r" (regs),
|
||
|
|
"r" (sp - sizeof(struct reg_window)),
|
||
|
|
"r" (zero),
|
||
|
|
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))
|
||
|
|
: "memory");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Free all resources held by a thread. */
|
||
|
|
#define release_thread(tsk) do { } while(0)
|
||
|
|
extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
|
||
|
|
|
||
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
||
|
|
#define prepare_to_copy(tsk) do { } while (0)
|
||
|
|
|
||
|
|
extern unsigned long get_wchan(struct task_struct *);
|
||
|
|
|
||
|
|
#define KSTK_EIP(tsk) ((tsk)->thread.kregs->pc)
|
||
|
|
#define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP])
|
||
|
|
|
||
|
|
#ifdef __KERNEL__
|
||
|
|
|
||
|
|
extern struct task_struct *last_task_used_math;
|
||
|
|
|
||
|
|
#define cpu_relax() barrier()
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* __ASM_SPARC_PROCESSOR_H */
|