48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef __ASM_PARISC_ALTERNATIVE_H
|
||
|
|
#define __ASM_PARISC_ALTERNATIVE_H
|
||
|
|
|
||
|
|
#define ALT_COND_NO_SMP 0x01 /* when running UP instead of SMP */
|
||
|
|
#define ALT_COND_NO_DCACHE 0x02 /* if system has no d-cache */
|
||
|
|
#define ALT_COND_NO_ICACHE 0x04 /* if system has no i-cache */
|
||
|
|
#define ALT_COND_NO_SPLIT_TLB 0x08 /* if split_tlb == 0 */
|
||
|
|
#define ALT_COND_NO_IOC_FDC 0x10 /* if I/O cache does not need flushes */
|
||
|
|
|
||
|
|
#define INSN_PxTLB 0x02 /* modify pdtlb, pitlb */
|
||
|
|
#define INSN_NOP 0x08000240 /* nop */
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/stddef.h>
|
||
|
|
#include <linux/stringify.h>
|
||
|
|
|
||
|
|
struct alt_instr {
|
||
|
|
s32 orig_offset; /* offset to original instructions */
|
||
|
|
u32 len; /* end of original instructions */
|
||
|
|
u32 cond; /* see ALT_COND_XXX */
|
||
|
|
u32 replacement; /* replacement instruction or code */
|
||
|
|
};
|
||
|
|
|
||
|
|
void set_kernel_text_rw(int enable_read_write);
|
||
|
|
|
||
|
|
/* Alternative SMP implementation. */
|
||
|
|
#define ALTERNATIVE(cond, replacement) "!0:" \
|
||
|
|
".section .altinstructions, \"aw\" !" \
|
||
|
|
".word (0b-4-.), 1, " __stringify(cond) "," \
|
||
|
|
__stringify(replacement) " !" \
|
||
|
|
".previous"
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define ALTERNATIVE(from, to, cond, replacement)\
|
||
|
|
.section .altinstructions, "aw" ! \
|
||
|
|
.word (from - .), (to - from)/4 ! \
|
||
|
|
.word cond, replacement ! \
|
||
|
|
.previous
|
||
|
|
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
|
||
|
|
#endif /* __ASM_PARISC_ALTERNATIVE_H */
|