/* 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 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); 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 #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 */