93 lines
2.0 KiB
C
93 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* MIPS support for CONFIG_OF device tree support
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*
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* Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com>
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/memblock.h>
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#include <linux/debugfs.h>
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#include <linux/of.h>
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#include <linux/of_fdt.h>
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#include <linux/of_platform.h>
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#include <asm/bootinfo.h>
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#include <asm/page.h>
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#include <asm/prom.h>
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static char mips_machine_name[64] = "Unknown";
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__init void mips_set_machine_name(const char *name)
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{
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if (name == NULL)
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return;
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strlcpy(mips_machine_name, name, sizeof(mips_machine_name));
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pr_info("MIPS: machine is %s\n", mips_get_machine_name());
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}
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char *mips_get_machine_name(void)
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{
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return mips_machine_name;
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}
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#ifdef CONFIG_USE_OF
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void __init early_init_dt_add_memory_arch(u64 base, u64 size)
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{
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if (base >= PHYS_ADDR_MAX) {
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pr_warn("Trying to add an invalid memory region, skipped\n");
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return;
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}
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/* Truncate the passed memory region instead of type casting */
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if (base + size - 1 >= PHYS_ADDR_MAX || base + size < base) {
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pr_warn("Truncate memory region %llx @ %llx to size %llx\n",
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size, base, PHYS_ADDR_MAX - base);
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size = PHYS_ADDR_MAX - base;
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}
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add_memory_region(base, size, BOOT_MEM_RAM);
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}
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int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
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phys_addr_t size, bool nomap)
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{
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add_memory_region(base, size,
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nomap ? BOOT_MEM_NOMAP : BOOT_MEM_RESERVED);
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return 0;
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}
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void __init __dt_setup_arch(void *bph)
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{
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if (!early_init_dt_scan(bph))
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return;
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mips_set_machine_name(of_flat_dt_get_machine_name());
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}
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int __init __dt_register_buses(const char *bus0, const char *bus1)
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{
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static struct of_device_id of_ids[3];
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if (!of_have_populated_dt())
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panic("device tree not present");
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strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
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if (bus1) {
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strlcpy(of_ids[1].compatible, bus1,
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sizeof(of_ids[1].compatible));
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}
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if (of_platform_populate(NULL, of_ids, NULL, NULL))
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panic("failed to populate DT");
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return 0;
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}
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#endif
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