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43 lines
845 B
43 lines
845 B
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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*/ |
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#include <linux/fs.h> |
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#include <linux/fcntl.h> |
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#include <linux/memblock.h> |
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#include <linux/mm.h> |
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#include <asm/bootinfo.h> |
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#include <loongson.h> |
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#include <mem.h> |
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#include <pci.h> |
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u32 memsize, highmemsize; |
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void __init prom_init_memory(void) |
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{ |
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memblock_add(0x0, (memsize << 20)); |
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#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG |
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{ |
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int bit; |
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bit = fls(memsize + highmemsize); |
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if (bit != ffs(memsize + highmemsize)) |
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bit += 20; |
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else |
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bit = bit + 20 - 1; |
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/* set cpu window3 to map CPU to DDR: 2G -> 2G */ |
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LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul, |
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0x80000000ul, (1 << bit)); |
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mmiowb(); |
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} |
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#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */ |
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#ifdef CONFIG_64BIT |
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if (highmemsize > 0) |
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memblock_add(LOONGSON_HIGHMEM_START, highmemsize << 20); |
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#endif /* !CONFIG_64BIT */ |
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}
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