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) */ 47