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- /* $Id: processor.h,v 1.53 1999/01/19 07:57:51 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
-
- #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 long seg;
- } mm_segment_t;
-
- /* The Sparc processor specific thread struct. */
- struct thread_struct {
- /*DC1*/ unsigned long ksp __attribute__ ((aligned(16)));
- unsigned short wstate;
- unsigned short cwp;
- unsigned short flags;
- unsigned short ctx;
-
- /*DC2*/ unsigned short w_saved;
- unsigned short new_signal;
- unsigned int ___pad;
- mm_segment_t current_ds;
-
- /*DC3*/ struct pt_regs *kregs;
- unsigned long *utraps;
-
- struct reg_window reg_window[NSWINS] __attribute__ ((aligned (16)));
- unsigned long rwbuf_stkptrs[NSWINS] __attribute__ ((aligned (8)));
-
- unsigned long sig_address __attribute__ ((aligned (8)));
- unsigned long sig_desc;
-
- /* Performance counter state */
- u64 *user_cntd0, *user_cntd1;
- u64 kernel_cntd0, kernel_cntd1;
- u64 pcr_reg;
-
- unsigned char fpdepth;
- unsigned char fpsaved[7];
- unsigned char gsr[7];
- unsigned long xfsr[7];
- };
-
- #endif /* !(__ASSEMBLY__) */
-
- #define SPARC_FLAG_KTHREAD 0x010 /* task is a kernel thread */
- #define SPARC_FLAG_UNALIGNED 0x020 /* is allowed to do unaligned accesses */
- #define SPARC_FLAG_NEWSIGNALS 0x040 /* task wants new-style signals */
- #define SPARC_FLAG_32BIT 0x080 /* task is older 32-bit binary */
- #define SPARC_FLAG_NEWCHILD 0x100 /* task is just-spawned child process */
- #define SPARC_FLAG_PERFCTR 0x200 /* task has performance counters active */
-
- #define INIT_MMAP { &init_mm, 0xfffff80000000000, 0xfffff80001000000, \
- NULL, PAGE_SHARED , VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
-
- #define INIT_TSS { \
- /* ksp, wstate, cwp, flags, ctx, */ \
- 0, 0, 0, SPARC_FLAG_KTHREAD, 0, \
- /* w_saved, new_signal, padding, current_ds, */ \
- 0, 0, 0, KERNEL_DS, \
- /* kregs, utraps, */ \
- 0, 0, \
- /* reg_window */ \
- { { { 0, }, { 0, } }, }, \
- /* rwbuf_stkptrs */ \
- { 0, 0, 0, 0, 0, 0, 0, }, \
- /* sig_address, sig_desc */ \
- 0, 0, \
- /* user_cntd0, user_cndd1, kernel_cntd0, kernel_cntd0, pcr_reg */ \
- 0, 0, 0, 0, 0, \
- /* fpdepth, fpsaved, gsr, xfsr */ \
- 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 *sp = (unsigned long *)(t->ksp + STACK_BIAS);
- unsigned long *fp = (unsigned long *)(sp[14] + STACK_BIAS);
-
- return fp[15];
- }
-
- /* On Uniprocessor, even in RMO processes see TSO semantics */
- #ifdef __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->tss.flags &= ~SPARC_FLAG_32BIT; \
- current->tss.wstate = (1 << 3); \
- if (current->tss.utraps) { \
- if (*(current->tss.utraps) < 2) \
- kfree (current->tss.utraps); \
- else \
- (*(current->tss.utraps))--; \
- current->tss.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->tss.flags |= SPARC_FLAG_32BIT; \
- current->tss.wstate = (2 << 3); \
- if (current->tss.utraps) { \
- if (*(current->tss.utraps) < 2) \
- kfree (current->tss.utraps); \
- else \
- (*(current->tss.utraps))--; \
- current->tss.utraps = NULL; \
- } \
- __asm__ __volatile__( \
- "stxa %3, [%4] %5\n\t" \
- "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" (((unsigned long)current->mm->pgd[0])<<11UL), \
- "r" (TSB_REG), "i" (ASI_DMMU)); \
- } while(0)
-
- /* Free all resources held by a thread. */
- #define release_thread(tsk) do { } while(0)
-
- #define copy_segments(nr, tsk, mm) do { } while (0)
- #define release_segments(mm) do { } while (0)
- #define forget_segments() 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))
- #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) */
-