mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 00:52:01 +00:00
5110bd21b8
While doing some easy cleanups on the sparc code I noticed that the CONFIG_SUN4 code seems to be worse than the rest - there were some "I don't know how it should work, but the current code definitely cannot work." places. And while I have seen people running Linux on machines like a SPARCstation 5 a few years ago I don't recall having seen sun4 machines, even less ones running Linux. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
41 lines
977 B
C
41 lines
977 B
C
/* asmmacro.h: Assembler macros.
|
|
*
|
|
* Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
|
|
*/
|
|
|
|
#ifndef _SPARC_ASMMACRO_H
|
|
#define _SPARC_ASMMACRO_H
|
|
|
|
#include <asm/btfixup.h>
|
|
#include <asm/asi.h>
|
|
|
|
#define GET_PROCESSOR4M_ID(reg) \
|
|
rd %tbr, %reg; \
|
|
srl %reg, 12, %reg; \
|
|
and %reg, 3, %reg;
|
|
|
|
#define GET_PROCESSOR4D_ID(reg) \
|
|
lda [%g0] ASI_M_VIKING_TMP1, %reg;
|
|
|
|
/* 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;
|
|
|
|
/* sun4 probably wants half word accesses to ASI_SEGMAP, while sun4c+
|
|
likes byte accesses. These are to avoid ifdef mania. */
|
|
|
|
#define lduXa lduba
|
|
#define stXa stba
|
|
|
|
#endif /* !(_SPARC_ASMMACRO_H) */
|