diff options
Diffstat (limited to 'include/asm-sparc64/system.h')
| -rw-r--r-- | include/asm-sparc64/system.h | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h index 786cfd2af..d0d88fa5c 100644 --- a/include/asm-sparc64/system.h +++ b/include/asm-sparc64/system.h @@ -1,4 +1,4 @@ -/* $Id: system.h,v 1.19 1997/05/18 22:52:32 davem Exp $ */ +/* $Id: system.h,v 1.22 1997/06/01 10:27:28 davem Exp $ */ #ifndef __SPARC64_SYSTEM_H #define __SPARC64_SYSTEM_H @@ -114,16 +114,24 @@ extern __inline__ void flushw_user(void) #define flush_user_windows flushw_user #ifdef __SMP__ -#error SMP not supported on sparc64 + +#include <asm/fpumacro.h> + +#define SWITCH_ENTER(prev) \ + if((prev)->flags & PF_USEDFPU) { \ + fprs_write(FPRS_FEF); \ + fpsave((unsigned long *) &(prev)->tss.float_regs[0], \ + &(prev)->tss.fsr); \ + (prev)->flags &= ~PF_USEDFPU; \ + (prev)->tss.kregs->tstate &= ~TSTATE_PEF; \ + } + +#define SWITCH_DO_LAZY_FPU(next) #else -#if 0 +#define SWITCH_ENTER(prev) #define SWITCH_DO_LAZY_FPU(next) \ if(last_task_used_math != (next)) \ - (next)->tss.kregs->tstate&=~TSTATE_PEF -#else -/* XXX FIX ME BIG TIME XXX -DaveM */ -#define SWITCH_DO_LAZY_FPU(next) do { } while(0) -#endif + (next)->tss.kregs->tstate &= ~TSTATE_PEF #endif /* See what happens when you design the chip correctly? @@ -138,29 +146,33 @@ extern __inline__ void flushw_user(void) do { \ __label__ switch_continue; \ register unsigned long task_pc asm("o7"); \ + SWITCH_ENTER(prev) \ SWITCH_DO_LAZY_FPU(next); \ task_pc = ((unsigned long) &&switch_continue) - 0x8; \ __asm__ __volatile__( \ + "rdpr %%pstate, %%g2\n\t" \ + "wrpr %%g2, 0x2, %%pstate\n\t" \ "flushw\n\t" \ "stx %%i6, [%%sp + 2047 + 0x70]\n\t" \ "stx %%i7, [%%sp + 2047 + 0x78]\n\t" \ - "stx %%o6, [%%g6 + %3]\n\t" \ "rdpr %%wstate, %%o5\n\t" \ - "stx %%o7, [%%g6 + %4]\n\t" \ + "stx %%o6, [%%g6 + %3]\n\t" \ "stx %%o5, [%%g6 + %2]\n\t" \ "rdpr %%cwp, %%o5\n\t" \ + "stx %%o7, [%%g6 + %4]\n\t" \ "stx %%o5, [%%g6 + %5]\n\t" \ "mov %0, %%g6\n\t" \ + "ldx [%0 + %5], %%g1\n\t" \ "wr %0, 0x0, %%pic\n\t" \ - "ldx [%%g6 + %5], %%g1\n\t" \ "wrpr %%g1, %%cwp\n\t" \ "ldx [%%g6 + %2], %%o5\n\t" \ "ldx [%%g6 + %3], %%o6\n\t" \ "ldx [%%g6 + %4], %%o7\n\t" \ "wrpr %%o5, 0x0, %%wstate\n\t" \ "ldx [%%sp + 2047 + 0x70], %%i6\n\t" \ + "ldx [%%sp + 2047 + 0x78], %%i7\n\t" \ "jmpl %%o7 + 0x8, %%g0\n\t" \ - " ldx [%%sp + 2047 + 0x78], %%i7\n\t" \ + " wrpr %%g2, 0x0, %%pstate\n\t" \ : /* No outputs */ \ : "r" (next), "r" (task_pc), \ "i" ((const unsigned long)(&((struct task_struct *)0)->tss.wstate)), \ |