mirror of https://gitee.com/openkylin/linux.git
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
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*/
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/init.h>
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#include <linux/sizes.h>
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#include <linux/of_fdt.h>
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#include <linux/kernel.h>
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#include <linux/bootmem.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <asm/reboot.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include "common.h"
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__iomem void *rt_sysc_membase;
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__iomem void *rt_memc_membase;
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extern struct boot_param_header __dtb_start;
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__iomem void *plat_of_remap_node(const char *node)
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{
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struct resource res;
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struct device_node *np;
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np = of_find_compatible_node(NULL, NULL, node);
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if (!np)
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panic("Failed to find %s node", node);
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if (of_address_to_resource(np, 0, &res))
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panic("Failed to get resource for %s", node);
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if ((request_mem_region(res.start,
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resource_size(&res),
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res.name) < 0))
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panic("Failed to request resources for %s", node);
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return ioremap_nocache(res.start, resource_size(&res));
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}
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void __init device_tree_init(void)
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{
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unsigned long base, size;
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void *fdt_copy;
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if (!initial_boot_params)
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return;
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base = virt_to_phys((void *)initial_boot_params);
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size = be32_to_cpu(initial_boot_params->totalsize);
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/* Before we do anything, lets reserve the dt blob */
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reserve_bootmem(base, size, BOOTMEM_DEFAULT);
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/* The strings in the flattened tree are referenced directly by the
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* device tree, so copy the flattened device tree from init memory
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* to regular memory.
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*/
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fdt_copy = alloc_bootmem(size);
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memcpy(fdt_copy, initial_boot_params, size);
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initial_boot_params = fdt_copy;
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unflatten_device_tree();
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/* free the space reserved for the dt blob */
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free_bootmem(base, size);
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}
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void __init plat_mem_setup(void)
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{
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set_io_port_base(KSEG1);
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/*
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* Load the builtin devicetree. This causes the chosen node to be
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* parsed resulting in our memory appearing
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*/
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__dt_setup_arch(&__dtb_start);
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if (soc_info.mem_size)
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add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
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BOOT_MEM_RAM);
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else
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detect_memory_region(soc_info.mem_base,
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soc_info.mem_size_min * SZ_1M,
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soc_info.mem_size_max * SZ_1M);
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}
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static int __init plat_of_setup(void)
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{
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static struct of_device_id of_ids[3];
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int len = sizeof(of_ids[0].compatible);
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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, soc_info.compatible, len);
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strncpy(of_ids[1].compatible, "palmbus", len);
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if (of_platform_populate(NULL, of_ids, NULL, NULL))
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panic("failed to populate DT\n");
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/* make sure ithat the reset controller is setup early */
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ralink_rst_init();
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return 0;
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}
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arch_initcall(plat_of_setup);
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