| /* SPDX-License-Identifier: GPL-2.0 */ | |
| /* 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) */ |