mirror of https://gitee.com/openkylin/linux.git
104 lines
2.4 KiB
C
104 lines
2.4 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) 2010 John Crispin <blogic@openwrt.org>
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*/
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#include <linux/export.h>
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#include <linux/clk.h>
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#include <linux/of_platform.h>
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#include <asm/bootinfo.h>
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#include <asm/time.h>
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#include <lantiq.h>
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#include "prom.h"
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#include "clk.h"
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/* access to the ebu needs to be locked between different drivers */
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DEFINE_SPINLOCK(ebu_lock);
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EXPORT_SYMBOL_GPL(ebu_lock);
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/*
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* this struct is filled by the soc specific detection code and holds
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* information about the specific soc type, revision and name
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*/
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static struct ltq_soc_info soc_info;
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const char *get_system_type(void)
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{
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return soc_info.sys_type;
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}
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void prom_free_prom_memory(void)
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{
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}
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static void __init prom_init_cmdline(void)
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{
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int argc = fw_arg0;
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char **argv = (char **) KSEG1ADDR(fw_arg1);
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int i;
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arcs_cmdline[0] = '\0';
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for (i = 0; i < argc; i++) {
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char *p = (char *) KSEG1ADDR(argv[i]);
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if (CPHYSADDR(p) && *p) {
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strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
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strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
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}
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}
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}
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void __init plat_mem_setup(void)
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{
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ioport_resource.start = IOPORT_RESOURCE_START;
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ioport_resource.end = IOPORT_RESOURCE_END;
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iomem_resource.start = IOMEM_RESOURCE_START;
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iomem_resource.end = IOMEM_RESOURCE_END;
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set_io_port_base((unsigned long) 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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}
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void __init prom_init(void)
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{
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/* call the soc specific detetcion code and get it to fill soc_info */
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ltq_soc_detect(&soc_info);
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snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
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soc_info.name, soc_info.rev_type);
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soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
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pr_info("SoC: %s\n", soc_info.sys_type);
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prom_init_cmdline();
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#if defined(CONFIG_MIPS_MT_SMP)
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if (register_vsmp_smp_ops())
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panic("failed to register_vsmp_smp_ops()");
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#endif
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}
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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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if (!of_have_populated_dt())
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panic("device tree not present");
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strncpy(of_ids[0].compatible, soc_info.compatible,
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sizeof(of_ids[0].compatible));
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strncpy(of_ids[1].compatible, "simple-bus",
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sizeof(of_ids[1].compatible));
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return of_platform_bus_probe(NULL, of_ids, NULL);
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}
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arch_initcall(plat_of_setup);
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