| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* asmmacro.h: Assembler macros. |
| 3 | * |
| 4 | * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu) |
| 5 | */ |
| 6 | |
| 7 | #ifndef _SPARC_ASMMACRO_H |
| 8 | #define _SPARC_ASMMACRO_H |
| 9 | |
| 10 | /* All trap entry points _must_ begin with this macro or else you |
| 11 | * lose. It makes sure the kernel has a proper window so that |
| 12 | * c-code can be called. |
| 13 | */ |
| 14 | #define SAVE_ALL_HEAD \ |
| 15 | sethi %hi(trap_setup), %l4; \ |
| 16 | jmpl %l4 + %lo(trap_setup), %l6; |
| 17 | #define SAVE_ALL \ |
| 18 | SAVE_ALL_HEAD \ |
| 19 | nop; |
| 20 | |
| 21 | /* All traps low-level code here must end with this macro. */ |
| 22 | #define RESTORE_ALL b ret_trap_entry; clr %l6; |
| 23 | |
| 24 | /* Support for run-time patching of single instructions. |
| 25 | * This is used to handle the differences in the ASI for |
| 26 | * MMUREGS for LEON and SUN. |
| 27 | * |
| 28 | * Sample: |
| 29 | * LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %o0 |
| 30 | * SUN_PI_(lda [%g0] ASI_M_MMUREGS, %o0 |
| 31 | * PI == Patch Instruction |
| 32 | * |
| 33 | * For LEON we will use the first variant, |
| 34 | * and for all other we will use the SUN variant. |
| 35 | * The order is important. |
| 36 | */ |
| 37 | #define LEON_PI(...) \ |
| 38 | 662: __VA_ARGS__ |
| 39 | |
| 40 | #define SUN_PI_(...) \ |
| 41 | .section .leon_1insn_patch, "ax"; \ |
| 42 | .word 662b; \ |
| 43 | __VA_ARGS__; \ |
| 44 | .previous |
| 45 | |
| 46 | #endif /* !(_SPARC_ASMMACRO_H) */ |