Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef __ASM_PARISC_ALTERNATIVE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define __ASM_PARISC_ALTERNATIVE_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #define ALT_COND_ALWAYS		0x80	/* always replace instruction */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #define ALT_COND_NO_SMP		0x01	/* when running UP instead of SMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #define ALT_COND_NO_DCACHE	0x02	/* if system has no d-cache  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #define ALT_COND_NO_ICACHE	0x04	/* if system has no i-cache  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #define ALT_COND_NO_SPLIT_TLB	0x08	/* if split_tlb == 0  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define ALT_COND_NO_IOC_FDC	0x10	/* if I/O cache does not need flushes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define ALT_COND_RUN_ON_QEMU	0x20	/* if running on QEMU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define INSN_PxTLB	0x02		/* modify pdtlb, pitlb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define INSN_NOP	0x08000240	/* nop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/stringify.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct alt_instr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	s32 orig_offset;	/* offset to original instructions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	s32 len;		/* end of original instructions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	u32 cond;		/* see ALT_COND_XXX */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	u32 replacement;	/* replacement instruction or code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) void set_kernel_text_rw(int enable_read_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) void apply_alternatives_all(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) void apply_alternatives(struct alt_instr *start, struct alt_instr *end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	const char *module_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* Alternative SMP implementation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define ALTERNATIVE(cond, replacement)		"!0:"	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	".section .altinstructions, \"aw\"	!"	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	".word (0b-4-.), 1, " __stringify(cond) ","	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		__stringify(replacement) "	!"	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	".previous"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* to replace one single instructions by a new instruction */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define ALTERNATIVE(from, to, cond, replacement)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	.section .altinstructions, "aw"	!	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	.word (from - .), (to - from)/4	!	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	.word cond, replacement		!	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	.previous
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* to replace multiple instructions by new code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define ALTERNATIVE_CODE(from, num_instructions, cond, new_instr_ptr)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	.section .altinstructions, "aw"	!	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	.word (from - .), -num_instructions !	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	.word cond, (new_instr_ptr - .)	!	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	.previous
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #endif  /*  __ASSEMBLY__  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #endif /* __ASM_PARISC_ALTERNATIVE_H */