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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright IBM Corp. 1999, 2011
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #ifndef __ASM_CMPXCHG_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #define __ASM_CMPXCHG_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mmdebug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define cmpxchg(ptr, o, n)						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) ({									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	__typeof__(*(ptr)) __o = (o);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	__typeof__(*(ptr)) __n = (n);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	(__typeof__(*(ptr))) __sync_val_compare_and_swap((ptr),__o,__n);\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define cmpxchg64	cmpxchg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define cmpxchg_local	cmpxchg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define cmpxchg64_local	cmpxchg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define xchg(ptr, x)							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) ({									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	__typeof__(ptr) __ptr = (ptr);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	__typeof__(*(ptr)) __old;					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	do {								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		__old = *__ptr;						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	} while (!__sync_bool_compare_and_swap(__ptr, __old, x));	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	__old;								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define __cmpxchg_double(p1, p2, o1, o2, n1, n2)			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ({									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	register __typeof__(*(p1)) __old1 asm("2") = (o1);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	register __typeof__(*(p2)) __old2 asm("3") = (o2);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	register __typeof__(*(p1)) __new1 asm("4") = (n1);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	register __typeof__(*(p2)) __new2 asm("5") = (n2);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	int cc;								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	asm volatile(							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		"	cdsg	%[old],%[new],%[ptr]\n"			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		"	ipm	%[cc]\n"				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		"	srl	%[cc],28"				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		: [cc] "=d" (cc), [old] "+d" (__old1), "+d" (__old2)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		: [new] "d" (__new1), "d" (__new2),			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		  [ptr] "Q" (*(p1)), "Q" (*(p2))			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		: "memory", "cc");					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	!cc;								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define cmpxchg_double(p1, p2, o1, o2, n1, n2)				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ({									\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	__typeof__(p1) __p1 = (p1);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	__typeof__(p2) __p2 = (p2);					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	BUILD_BUG_ON(sizeof(*(p1)) != sizeof(long));			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	BUILD_BUG_ON(sizeof(*(p2)) != sizeof(long));			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	VM_BUG_ON((unsigned long)((__p1) + 1) != (unsigned long)(__p2));\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	__cmpxchg_double(__p1, __p2, o1, o2, n1, n2);			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define system_has_cmpxchg_double()	1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #endif /* __ASM_CMPXCHG_H */