Orange Pi5 kernel

Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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^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)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/fcntl.h>
^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/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <asm/bootinfo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <loongson.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <mem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) u32 memsize, highmemsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) void __init prom_init_memory(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	memblock_add(0x0, (memsize << 20));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		int bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		bit = fls(memsize + highmemsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		if (bit != ffs(memsize + highmemsize))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 			bit += 20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 			bit = bit + 20 - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		/* set cpu window3 to map CPU to DDR: 2G -> 2G */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 					  0x80000000ul, (1 << bit));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		mmiowb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #ifdef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	if (highmemsize > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		memblock_add(LOONGSON_HIGHMEM_START, highmemsize << 20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #endif /* !CONFIG_64BIT */
^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) /* override of arch/mips/mm/cache.c: __uncached_access */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) int __uncached_access(struct file *file, unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (file->f_flags & O_DSYNC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	return addr >= __pa(high_memory) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		((addr >= LOONGSON_MMIO_MEM_START) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		 (addr < LOONGSON_MMIO_MEM_END));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }