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/* $Id: processor.h,v 1.26 1997/05/17 05:59:10 davem Exp $
* include/asm-sparc64/processor.h
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef __ASM_SPARC64_PROCESSOR_H
#define __ASM_SPARC64_PROCESSOR_H
#include <asm/a.out.h>
#include <asm/pstate.h>
#include <asm/ptrace.h>
#include <asm/signal.h>
#include <asm/segment.h>
/* Bus types */
#define EISA_bus 0
#define EISA_bus__is_a_macro /* for versions in ksyms.c */
#define MCA_bus 0
#define MCA_bus__is_a_macro /* for versions in ksyms.c */
/* 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 */
/* User lives in his very own context, and cannot reference us. */
#define TASK_SIZE ((1UL << (PAGE_SHIFT - 3)) * PGDIR_SIZE)
#ifndef __ASSEMBLY__
#define NSWINS 8
/* The Sparc processor specific thread struct. */
struct thread_struct {
/* Floating point regs */
/* Please check asm_offsets, so that not to much precious space
is wasted by this alignment and move the float_regs wherever
is better in this structure. Remember every byte of alignment
is multiplied by 512 to get the amount of wasted kernel memory. */
unsigned int float_regs[64] __attribute__ ((aligned (64)));
unsigned long fsr;
/* Context switch saved kernel state. */
unsigned long ksp, kpc, wstate, cwp;
/* Storage for windows when user stack is bogus. */
struct reg_window reg_window[NSWINS] __attribute__ ((aligned (16)));
unsigned long rwbuf_stkptrs[NSWINS] __attribute__ ((aligned (8)));
unsigned long w_saved;
/* Arch-specific task state flags, see below. */
unsigned long flags;
/* For signal handling */
unsigned long sig_address __attribute__ ((aligned (8)));
unsigned long sig_desc;
struct sigstack sstk_info;
int current_ds, new_signal;
struct pt_regs *kregs;
struct exec core_exec; /* just what it says. */
};
#endif /* !(__ASSEMBLY__) */
#define SPARC_FLAG_KTHREAD 0x1 /* task is a kernel thread */
#define SPARC_FLAG_UNALIGNED 0x2 /* is allowed to do unaligned accesses */
#define SPARC_FLAG_NEWSIGNALS 0x4 /* task wants new-style signals */
#define SPARC_FLAG_32BIT 0x8 /* task is older 32-bit binary */
#define INIT_MMAP { &init_mm, 0xfffff80000000000, 0xfffff80001000000, \
PAGE_SHARED , VM_READ | VM_WRITE | VM_EXEC, NULL, &init_mm.mmap }
#define INIT_TSS { \
/* FPU regs */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, \
/* FPU status */ \
0, \
/* ksp, kpc, wstate, cwp */ \
0, 0, 0, 0, \
/* reg_window */ \
{ { { 0, }, { 0, } }, }, \
/* rwbuf_stkptrs */ \
{ 0, 0, 0, 0, 0, 0, 0, 0, }, \
/* w_saved */ \
0, \
/* flags */ \
SPARC_FLAG_KTHREAD, \
/* sig_address, sig_desc */ \
0, 0, \
/* ex, sstk_info, current_ds, */ \
{ 0, 0, }, USER_DS, \
/* new_signal, kregs */ \
0, 0, \
/* core_exec */ \
{ 0, }, \
}
#ifndef __ASSEMBLY__
/* Return saved PC of a blocked thread. */
extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t)
{
return t->kpc;
}
/* Do necessary setup to start up a newly executed thread. */
#define start_thread(regs, pc, sp) \
do { \
regs->tstate = (regs->tstate & (TSTATE_CWP)) | TSTATE_IE; \
regs->tpc = ((pc & (~3)) - 4); \
regs->tnpc = regs->tpc + 4; \
regs->y = 0; \
current->tss.flags &= ~SPARC_FLAG_32BIT; \
__asm__ __volatile__( \
"stx %%g0, [%0 + %2 + 0x00]\n\t" \
"stx %%g0, [%0 + %2 + 0x08]\n\t" \
"stx %%g0, [%0 + %2 + 0x10]\n\t" \
"stx %%g0, [%0 + %2 + 0x18]\n\t" \
"stx %%g0, [%0 + %2 + 0x20]\n\t" \
"stx %%g0, [%0 + %2 + 0x28]\n\t" \
"stx %%g0, [%0 + %2 + 0x30]\n\t" \
"stx %%g0, [%0 + %2 + 0x38]\n\t" \
"stx %%g0, [%0 + %2 + 0x40]\n\t" \
"stx %%g0, [%0 + %2 + 0x48]\n\t" \
"stx %%g0, [%0 + %2 + 0x50]\n\t" \
"stx %%g0, [%0 + %2 + 0x58]\n\t" \
"stx %%g0, [%0 + %2 + 0x60]\n\t" \
"stx %%g0, [%0 + %2 + 0x68]\n\t" \
"stx %1, [%0 + %2 + 0x70]\n\t" \
"stx %%g0, [%0 + %2 + 0x78]\n\t" \
"wrpr %%g0, (1 << 3), %%wstate\n\t" \
: \
: "r" (regs), "r" (sp - REGWIN_SZ), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
} while(0)
#define start_thread32(regs, pc, sp) \
do { \
register unsigned int zero asm("g1"); \
\
pc &= 0x00000000ffffffffUL; \
sp &= 0x00000000ffffffffUL; \
\
regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_IE | TSTATE_AM); \
regs->tpc = ((pc & (~3)) - 4); \
regs->tnpc = regs->tpc + 4; \
regs->y = 0; \
current->tss.flags |= SPARC_FLAG_32BIT; \
zero = 0; \
__asm__ __volatile__( \
"stx %%g0, [%0 + %2 + 0x00]\n\t" \
"stx %%g0, [%0 + %2 + 0x08]\n\t" \
"stx %%g0, [%0 + %2 + 0x10]\n\t" \
"stx %%g0, [%0 + %2 + 0x18]\n\t" \
"stx %%g0, [%0 + %2 + 0x20]\n\t" \
"stx %%g0, [%0 + %2 + 0x28]\n\t" \
"stx %%g0, [%0 + %2 + 0x30]\n\t" \
"stx %%g0, [%0 + %2 + 0x38]\n\t" \
"stx %%g0, [%0 + %2 + 0x40]\n\t" \
"stx %%g0, [%0 + %2 + 0x48]\n\t" \
"stx %%g0, [%0 + %2 + 0x50]\n\t" \
"stx %%g0, [%0 + %2 + 0x58]\n\t" \
"stx %%g0, [%0 + %2 + 0x60]\n\t" \
"stx %%g0, [%0 + %2 + 0x68]\n\t" \
"stx %1, [%0 + %2 + 0x70]\n\t" \
"stx %%g0, [%0 + %2 + 0x78]\n\t" \
"wrpr %%g0, (2 << 3), %%wstate\n\t" \
: \
: "r" (regs), "r" (sp - REGWIN32_SZ), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0])), \
"r" (zero)); \
} while(0)
/* Free all resources held by a thread. */
#define release_thread(tsk) do { } while(0)
#ifdef __KERNEL__
/* Allocation and freeing of task_struct and kernel stack. */
#define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL, 1, 0))
#define free_task_struct(tsk) free_pages((unsigned long)(tsk),1)
#define init_task (init_task_union.task)
#define init_stack (init_task_union.stack)
#endif /* __KERNEL__ */
#endif /* !(__ASSEMBLY__) */
#endif /* !(__ASM_SPARC64_PROCESSOR_H) */
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