diff options
Diffstat (limited to 'qemu/roms/openbios/arch/sparc32/switch.S')
| -rw-r--r-- | qemu/roms/openbios/arch/sparc32/switch.S | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/qemu/roms/openbios/arch/sparc32/switch.S b/qemu/roms/openbios/arch/sparc32/switch.S deleted file mode 100644 index d5b1b659d..000000000 --- a/qemu/roms/openbios/arch/sparc32/switch.S +++ /dev/null @@ -1,154 +0,0 @@ -#define __ASSEMBLY -#include "psr.h" -#include "asm/asi.h" -#define ASI_BP ASI_M_BYPASS -#define REGWIN_SZ 0x40 - - .globl __switch_context, __switch_context_nosave, __exit_context, halt - - .text - .align 4 - -#define STACKFRAME_SZ 0x60 - -/* These are just handy. */ -#define _SV save %sp, -STACKFRAME_SZ, %sp -#define _RS restore - -#define FLUSH_ALL_KERNEL_WINDOWS \ - _SV; _SV; _SV; _SV; _SV; _SV; _SV; \ - _RS; _RS; _RS; _RS; _RS; _RS; _RS; - -/* - * Switch execution context - * This saves registers in the stack, then - * switches the stack, and restores everything from the new stack. - * This function takes no argument. New stack pointer is - * taken from global variable __context, and old stack pointer - * is also saved to __context. This way we can just jump to - * this routine to get back to the original context. - */ - -__switch_context: - FLUSH_ALL_KERNEL_WINDOWS - /* Save everything in stack */ - st %fp, [%fp + 120 -144] - add %fp, -144, %fp - st %g1, [%fp + 4] - st %g2, [%fp + 8] - st %g3, [%fp + 12] - st %g4, [%fp + 16] - st %g5, [%fp + 20] - st %g6, [%fp + 24] - st %g7, [%fp + 28] - - st %o0, [%fp + 32] - st %o1, [%fp + 36] - st %o2, [%fp + 40] - st %o3, [%fp + 44] - st %o4, [%fp + 48] - st %o5, [%fp + 52] - st %sp, [%fp + 56] - st %o7, [%fp + 60] - - st %l0, [%fp + 64] - st %l1, [%fp + 68] - st %l2, [%fp + 72] - st %l3, [%fp + 76] - st %l4, [%fp + 80] - st %l5, [%fp + 84] - st %l6, [%fp + 88] - st %l7, [%fp + 92] - - st %i0, [%fp + 96] - st %i1, [%fp + 100] - st %i2, [%fp + 104] - st %i3, [%fp + 108] - st %i4, [%fp + 112] - st %i5, [%fp + 116] - st %i7, [%fp + 124] - - /* ctx->return_address: Return to caller */ - st %o7, [%fp + 128] - - /* Interrupts are not allowed... */ - - /* Turn on Supervisor, EnableFloating, and all the PIL bits. - * Also puts us in register window zero with traps off. - */ -#if 0 - set (PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2 - wr %g2, 0x0, %psr -#endif - set __context, %g1 - /* Swap ctx pointer with %fp and jump*/ - ba __set_context - swap [%g1], %fp -__switch_context_nosave: - set __context, %g1 - /* load %fp from ctx pointer */ - ld [%g1], %fp -__set_context: - /* Load all registers */ - /* offset 0: %g0, no need to load */ - ld [%fp + 4], %g1 - ld [%fp + 8], %g2 - ld [%fp + 12], %g3 - ld [%fp + 16], %g4 - ld [%fp + 20], %g5 - ld [%fp + 24], %g6 - ld [%fp + 28], %g7 - - /* offset 32: %o0, loaded from ctx->param */ - ld [%fp + 36], %o1 - ld [%fp + 40], %o2 - ld [%fp + 44], %o3 - ld [%fp + 48], %o4 - ld [%fp + 52], %o5 - ld [%fp + 56], %sp - /* offset 60: %o7, loaded from ctx->return_addr */ - - ld [%fp + 64], %l0 - ld [%fp + 68], %l1 - ld [%fp + 72], %l2 - ld [%fp + 76], %l3 - ld [%fp + 80], %l4 - ld [%fp + 84], %l5 - ld [%fp + 88], %l6 - ld [%fp + 92], %l7 - - ld [%fp + 96], %i0 - ld [%fp + 100], %i1 - ld [%fp + 104], %i2 - ld [%fp + 108], %i3 - ld [%fp + 112], %i4 - ld [%fp + 116], %i5 - ld [%fp + 124], %i7 - - /* ctx->return_addr */ - ld [%fp + 136], %o7 - - /* ctx->param */ - ld [%fp + 140], %o0 - - /* ctx->pc, save %g1 to %y and load to %g1 */ - mov %g1, %y - ld [%fp + 128], %g1 - /* %fp last */ - ld [%fp + 120], %fp - /* Finally, get the new %pc from %g1 and restore %g1*/ - jmp %g1 - mov %y, %g1 - - FLUSH_ALL_KERNEL_WINDOWS -__exit_context: - /* Get back to the original context */ - call __switch_context - nop - - /* We get here if the other context attempt to switch to this - * dead context. This should not happen. */ - -halt: - b halt - nop |