Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * PPC EDAC common defs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Author: Dave Jiang <djiang@mvista.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * 2007 (c) MontaVista Software, Inc. This file is licensed under
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * the terms of the GNU General Public License version 2. This program
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * is licensed "as is" without any warranty of any kind, whether express
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * or implied.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #ifndef ASM_EDAC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define ASM_EDAC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * ECC atomic, DMA, SMP and interrupt safe scrub function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * Implements the per arch edac_atomic_scrub() that EDAC use for software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * ECC scrubbing.  It reads memory and then writes back the original
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  * value, allowing the hardware to detect and correct memory errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static __inline__ void edac_atomic_scrub(void *va, u32 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	unsigned int *virt_addr = va;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	unsigned int temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	for (i = 0; i < size / sizeof(*virt_addr); i++, virt_addr++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		/* Very carefully read and write to memory atomically
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		 * so we are interrupt, DMA and SMP safe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		__asm__ __volatile__ ("\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 				1:	lwarx	%0,0,%1\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 					stwcx.	%0,0,%1\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 					bne-	1b\n\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 					isync"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 					: "=&r"(temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 					: "r"(virt_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 					: "cr0", "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #endif