Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * License.  See the file COPYING in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) void *memcpy(void *to, const void *from, size_t n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	void *xto = to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	size_t temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	if (!n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 		return xto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	if ((long)to & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		char *cto = to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		const char *cfrom = from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		*cto++ = *cfrom++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		to = cto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		from = cfrom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		n--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #if defined(CONFIG_M68000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	if ((long)from & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		char *cto = to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		const char *cfrom = from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		for (; n; n--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 			*cto++ = *cfrom++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		return xto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	if (n > 2 && (long)to & 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		short *sto = to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		const short *sfrom = from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		*sto++ = *sfrom++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		to = sto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		from = sfrom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		n -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	temp = n >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (temp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		long *lto = to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		const long *lfrom = from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		for (; temp; temp--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 			*lto++ = *lfrom++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		size_t temp1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		asm volatile (
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 			"	movel %2,%3\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 			"	andw  #7,%3\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 			"	lsrl  #3,%2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 			"	negw  %3\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			"	jmp   %%pc@(1f,%3:w:2)\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 			"4:	movel %0@+,%1@+\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 			"	movel %0@+,%1@+\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 			"	movel %0@+,%1@+\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 			"	movel %0@+,%1@+\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 			"	movel %0@+,%1@+\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 			"	movel %0@+,%1@+\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 			"	movel %0@+,%1@+\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 			"	movel %0@+,%1@+\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 			"1:	dbra  %2,4b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 			"	clrw  %2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 			"	subql #1,%2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 			"	jpl   4b"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 			: "=a" (lfrom), "=a" (lto), "=d" (temp), "=&d" (temp1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 			: "0" (lfrom), "1" (lto), "2" (temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		to = lto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		from = lfrom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	if (n & 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 		short *sto = to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 		const short *sfrom = from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 		*sto++ = *sfrom++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 		to = sto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 		from = sfrom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	if (n & 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 		char *cto = to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 		const char *cfrom = from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 		*cto = *cfrom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 	return xto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) EXPORT_SYMBOL(memcpy);