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