68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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//
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// Copyright (C) 2019 Socionext Inc.
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// Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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#include <common.h>
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#include <dm/of.h>
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#include <fdt_support.h>
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#include <linux/io.h>
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#include <linux/libfdt.h>
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#include <linux/sizes.h>
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#include <asm/global_data.h>
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#include "base-address.h"
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#include "sc64-regs.h"
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#include "sg-regs.h"
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/*
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* Dummy initializers are needed to allocate these to .data section instead of
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* .bss section. The .bss section is unusable before relocation because the
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* .bss section and DT share the same address. Without the initializers,
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* DT would be broken.
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*/
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void __iomem *sc_base = (void *)0xdeadbeef;
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void __iomem *sg_base = (void *)0xdeadbeef;
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static u64 uniphier_base_address_get(const char *compat_tail)
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{
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DECLARE_GLOBAL_DATA_PTR;
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const void *fdt = gd->fdt_blob;
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int offset, len, i;
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const char *str;
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for (offset = fdt_next_node(fdt, 0, NULL);
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offset >= 0;
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offset = fdt_next_node(fdt, offset, NULL)) {
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for (i = 0;
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(str = fdt_stringlist_get(fdt, offset, "compatible", i, &len));
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i++) {
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if (!memcmp(compat_tail,
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str + len - strlen(compat_tail),
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strlen(compat_tail)))
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return fdt_get_base_address(fdt, offset);
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}
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}
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return OF_BAD_ADDR;
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}
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int uniphier_base_address_init(void)
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{
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u64 base;
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base = uniphier_base_address_get("-soc-glue");
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if (base == OF_BAD_ADDR)
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return -EINVAL;
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sg_base = ioremap(base, SZ_8K);
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base = uniphier_base_address_get("-sysctrl");
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if (base == OF_BAD_ADDR)
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return -EINVAL;
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sc_base = ioremap(base, SZ_64K);
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return 0;
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}
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