| /* asmmacro.h: Assembler macros. |
| * |
| * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu) |
| */ |
| |
| #ifndef _SPARC_ASMMACRO_H |
| #define _SPARC_ASMMACRO_H |
| |
| /* All trap entry points _must_ begin with this macro or else you |
| * lose. It makes sure the kernel has a proper window so that |
| * c-code can be called. |
| */ |
| #define SAVE_ALL_HEAD \ |
| sethi %hi(trap_setup), %l4; \ |
| jmpl %l4 + %lo(trap_setup), %l6; |
| #define SAVE_ALL \ |
| SAVE_ALL_HEAD \ |
| nop; |
| |
| /* All traps low-level code here must end with this macro. */ |
| #define RESTORE_ALL b ret_trap_entry; clr %l6; |
| |
| /* Support for run-time patching of single instructions. |
| * This is used to handle the differences in the ASI for |
| * MMUREGS for LEON and SUN. |
| * |
| * Sample: |
| * LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %o0 |
| * SUN_PI_(lda [%g0] ASI_M_MMUREGS, %o0 |
| * PI == Patch Instruction |
| * |
| * For LEON we will use the first variant, |
| * and for all other we will use the SUN variant. |
| * The order is important. |
| */ |
| #define LEON_PI(...) \ |
| 662: __VA_ARGS__ |
| |
| #define SUN_PI_(...) \ |
| .section .leon_1insn_patch, "ax"; \ |
| .word 662b; \ |
| __VA_ARGS__; \ |
| .previous |
| |
| #endif /* !(_SPARC_ASMMACRO_H) */ |
