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Diffstat (limited to 'arch/sparc/include/asm/asmmacro.h')
| -rw-r--r-- | arch/sparc/include/asm/asmmacro.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/asmmacro.h b/arch/sparc/include/asm/asmmacro.h new file mode 100644 index 000000000..49aaf6f3b --- /dev/null +++ b/arch/sparc/include/asm/asmmacro.h @@ -0,0 +1,46 @@ +/* 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) */ |