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![Masahiro Yamada](/assets/img/avatar_default.png)
Device tree specifies the available memory ranges in its "/memory" node. Use it to simplify the CONFIG defines. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
/*
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* Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <libfdt.h>
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#include <linux/err.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const void *get_memory_reg_prop(const void *fdt, int *lenp)
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{
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int offset;
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offset = fdt_path_offset(fdt, "/memory");
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if (offset < 0)
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return NULL;
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return fdt_getprop(fdt, offset, "reg", lenp);
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}
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int dram_init(void)
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{
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const fdt32_t *val;
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int len;
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val = get_memory_reg_prop(gd->fdt_blob, &len);
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if (len < sizeof(*val))
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return -EINVAL;
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gd->ram_size = fdt32_to_cpu(*(val + 1));
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debug("DRAM size = %08lx\n", gd->ram_size);
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return 0;
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}
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void dram_init_banksize(void)
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{
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const fdt32_t *val;
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int len, i;
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val = get_memory_reg_prop(gd->fdt_blob, &len);
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if (len < 0)
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return;
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len /= sizeof(*val);
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len /= 2;
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for (i = 0; i < len; i++) {
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gd->bd->bi_dram[i].start = fdt32_to_cpu(*val++);
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gd->bd->bi_dram[i].size = fdt32_to_cpu(*val++);
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debug("DRAM bank %d: start = %08lx, size = %08lx\n",
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i, gd->bd->bi_dram[i].start, gd->bd->bi_dram[i].size);
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}
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}
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