forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.9 KiB
60 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef __ASM_PARISC_ALTERNATIVE_H |
|
#define __ASM_PARISC_ALTERNATIVE_H |
|
|
|
#define ALT_COND_ALWAYS 0x80 /* always replace instruction */ |
|
#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 ALT_COND_RUN_ON_QEMU 0x20 /* if running on QEMU */ |
|
|
|
#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 */ |
|
s32 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); |
|
void apply_alternatives_all(void); |
|
void apply_alternatives(struct alt_instr *start, struct alt_instr *end, |
|
const char *module_name); |
|
|
|
/* Alternative SMP implementation. */ |
|
#define ALTERNATIVE(cond, replacement) "!0:" \ |
|
".section .altinstructions, \"aw\" !" \ |
|
".word (0b-4-.), 1, " __stringify(cond) "," \ |
|
__stringify(replacement) " !" \ |
|
".previous" |
|
|
|
#else |
|
|
|
/* to replace one single instructions by a new instruction */ |
|
#define ALTERNATIVE(from, to, cond, replacement)\ |
|
.section .altinstructions, "aw" ! \ |
|
.word (from - .), (to - from)/4 ! \ |
|
.word cond, replacement ! \ |
|
.previous |
|
|
|
/* to replace multiple instructions by new code */ |
|
#define ALTERNATIVE_CODE(from, num_instructions, cond, new_instr_ptr)\ |
|
.section .altinstructions, "aw" ! \ |
|
.word (from - .), -num_instructions ! \ |
|
.word cond, (new_instr_ptr - .) ! \ |
|
.previous |
|
|
|
#endif /* __ASSEMBLY__ */ |
|
|
|
#endif /* __ASM_PARISC_ALTERNATIVE_H */
|
|
|