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asmmacro.h
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1 /* asmmacro.h: Assembler macros.
2  *
3  * Copyright (C) 1996 David S. Miller ([email protected])
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) */