mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 00:17:44 +00:00
5b8b93c4ab
This will be used to handle that MMUREGS has different ASI for SUN and LEON. This is the infrastructure only - users will come later. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Daniel Hellstrom <daniel@gaisler.com> Cc: Konrad Eisele <konrad@gaisler.com>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/* 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) */
|