100 lines
2.3 KiB
C
100 lines
2.3 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 <john@phrozen.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 <asm/prom.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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__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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unflatten_and_copy_device_tree();
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}
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static int memory_dtb;
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static int __init early_init_dt_find_memory(unsigned long node,
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const char *uname, int depth, void *data)
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{
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if (depth == 1 && !strcmp(uname, "memory@0"))
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memory_dtb = 1;
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return 0;
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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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of_scan_flat_dt(early_init_dt_find_memory, NULL);
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if (memory_dtb)
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of_scan_flat_dt(early_init_dt_scan_memory, NULL);
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else 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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__dt_register_buses(soc_info.compatible, "palmbus");
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/* make sure that 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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