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/* $Id: processor.h,v 1.69 2001/03/08 22:08:51 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
/*
* Sparc64 implementation of macro that returns current
* instruction pointer ("program counter").
*/
#define current_text_addr() ({ void *pc; __asm__("rd %%pc, %0" : "=r" (pc)); pc; })
#include <linux/config.h>
#include <asm/asi.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. */
#ifndef __ASSEMBLY__
#define TASK_SIZE ((unsigned long)-PGDIR_SIZE)
#else
#define TASK_SIZE 0xfffffffc00000000
#endif
#ifndef __ASSEMBLY__
#define NSWINS 7
typedef struct {
unsigned char seg;
} mm_segment_t;
/* The Sparc processor specific thread struct. */
struct thread_struct {
/* D$ line 1 */
unsigned long ksp __attribute__ ((aligned(16)));
unsigned char wstate, cwp, flags;
mm_segment_t current_ds;
unsigned char w_saved, fpdepth, fault_code, use_blkcommit;
unsigned long fault_address;
unsigned char fpsaved[7];
unsigned char __pad2;
/* D$ line 2, 3, 4 */
struct pt_regs *kregs;
unsigned long *utraps;
unsigned long gsr[7];
unsigned long xfsr[7];
struct reg_window reg_window[NSWINS];
unsigned long rwbuf_stkptrs[NSWINS];
/* Performance counter state */
u64 *user_cntd0, *user_cntd1;
u64 kernel_cntd0, kernel_cntd1;
u64 pcr_reg;
};
#endif /* !(__ASSEMBLY__) */
#define SPARC_FLAG_UNALIGNED 0x01 /* is allowed to do unaligned accesses */
#define SPARC_FLAG_NEWSIGNALS 0x02 /* task wants new-style signals */
#define SPARC_FLAG_32BIT 0x04 /* task is older 32-bit binary */
#define SPARC_FLAG_NEWCHILD 0x08 /* task is just-spawned child process */
#define SPARC_FLAG_PERFCTR 0x10 /* task has performance counters active */
#define SPARC_FLAG_MMAPSHARED 0x20 /* task wants a shared mmap */
#define FAULT_CODE_WRITE 0x01 /* Write access, implies D-TLB */
#define FAULT_CODE_DTLB 0x02 /* Miss happened in D-TLB */
#define FAULT_CODE_ITLB 0x04 /* Miss happened in I-TLB */
#define FAULT_CODE_WINFIXUP 0x08 /* Miss happened during spill/fill */
#define INIT_MMAP { &init_mm, 0xfffff80000000000, 0xfffff80001000000, \
NULL, PAGE_SHARED , VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
#define INIT_THREAD { \
/* ksp, wstate, cwp, flags, current_ds, */ \
0, 0, 0, 0, KERNEL_DS, \
/* w_saved, fpdepth, fault_code, use_blkcommit, */ \
0, 0, 0, 0, \
/* fault_address, fpsaved, __pad2, kregs, */ \
0, { 0 }, 0, 0, \
/* utraps, gsr, xfsr, */ \
0, { 0 }, { 0 }, \
/* reg_window */ \
{ { { 0, }, { 0, } }, }, \
/* rwbuf_stkptrs */ \
{ 0, 0, 0, 0, 0, 0, 0, }, \
/* user_cntd0, user_cndd1, kernel_cntd0, kernel_cntd0, pcr_reg */ \
0, 0, 0, 0, 0, \
}
#ifndef __ASSEMBLY__
/* Return saved PC of a blocked thread. */
extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t)
{
unsigned long ret = 0xdeadbeefUL;
if (t->ksp) {
unsigned long *sp;
sp = (unsigned long *)(t->ksp + STACK_BIAS);
if (((unsigned long)sp & (sizeof(long) - 1)) == 0UL &&
sp[14]) {
unsigned long *fp;
fp = (unsigned long *)(sp[14] + STACK_BIAS);
if (((unsigned long)fp & (sizeof(long) - 1)) == 0UL)
ret = fp[15];
}
}
return ret;
}
/* On Uniprocessor, even in RMO processes see TSO semantics */
#ifdef CONFIG_SMP
#define TSTATE_INITIAL_MM TSTATE_TSO
#else
#define TSTATE_INITIAL_MM TSTATE_RMO
#endif
/* Do necessary setup to start up a newly executed thread. */
#define start_thread(regs, pc, sp) \
do { \
regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (ASI_PNF << 24); \
regs->tpc = ((pc & (~3)) - 4); \
regs->tnpc = regs->tpc + 4; \
regs->y = 0; \
current->thread.wstate = (1 << 3); \
if (current->thread.utraps) { \
if (*(current->thread.utraps) < 2) \
kfree (current->thread.utraps); \
else \
(*(current->thread.utraps))--; \
current->thread.utraps = NULL; \
} \
__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 - STACK_BIAS), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
} while(0)
#define start_thread32(regs, pc, sp) \
do { \
pc &= 0x00000000ffffffffUL; \
sp &= 0x00000000ffffffffUL; \
\
regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM); \
regs->tpc = ((pc & (~3)) - 4); \
regs->tnpc = regs->tpc + 4; \
regs->y = 0; \
current->thread.wstate = (2 << 3); \
if (current->thread.utraps) { \
if (*(current->thread.utraps) < 2) \
kfree (current->thread.utraps); \
else \
(*(current->thread.utraps))--; \
current->thread.utraps = NULL; \
} \
__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]))); \
} while(0)
/* 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);
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)
#define get_wchan(__TSK) \
({ extern void scheduling_functions_start_here(void); \
extern void scheduling_functions_end_here(void); \
unsigned long pc, fp, bias = 0; \
unsigned long task_base = (unsigned long) (__TSK); \
struct reg_window *rw; \
unsigned long __ret = 0; \
int count = 0; \
if (!(__TSK) || (__TSK) == current || \
(__TSK)->state == TASK_RUNNING) \
goto __out; \
bias = STACK_BIAS; \
fp = (__TSK)->thread.ksp + bias; \
do { \
/* Bogus frame pointer? */ \
if (fp < (task_base + sizeof(struct task_struct)) || \
fp >= (task_base + (2 * PAGE_SIZE))) \
break; \
rw = (struct reg_window *) fp; \
pc = rw->ins[7]; \
if (pc < ((unsigned long) scheduling_functions_start_here) || \
pc >= ((unsigned long) scheduling_functions_end_here)) { \
__ret = pc; \
goto __out; \
} \
fp = rw->ins[6] + bias; \
} while (++count < 16); \
__out: __ret; \
})
#define KSTK_EIP(tsk) ((tsk)->thread.kregs->tpc)
#define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP])
#ifdef __KERNEL__
#define THREAD_SIZE (2*PAGE_SIZE)
/* Allocation and freeing of task_struct and kernel stack. */
#define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL, 1))
#define free_task_struct(tsk) free_pages((unsigned long)(tsk),1)
#define get_task_struct(tsk) atomic_inc(&virt_to_page(tsk)->count)
#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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