Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/pfn.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/swap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/bootinfo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/mach-ar7/ar7.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static int __init memsize(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	u32 size = (64 << 20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	u32 *tmpaddr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	while (tmpaddr > kernel_end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		*tmpaddr = (u32)tmpaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		size >>= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		tmpaddr -= size >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		tmpaddr += size >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		if (*tmpaddr != (u32)tmpaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		size <<= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	} while (size < (64 << 20));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	writel((u32)tmpaddr, &addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) void __init prom_meminit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	unsigned long pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	pages = memsize() >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	memblock_add(PHYS_OFFSET, pages << PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) void __init prom_free_prom_memory(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	/* Nothing to free */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }