prom.c
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/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* Copyright (C) 2010 John Crispin <blogic@openwrt.org>
*/
#include <linux/export.h>
#include <linux/clk.h>
#include <linux/bootmem.h>
#include <linux/of_platform.h>
#include <linux/of_fdt.h>
#include <asm/bootinfo.h>
#include <asm/time.h>
#include <asm/prom.h>
#include <lantiq.h>
#include "prom.h"
#include "clk.h"
/* access to the ebu needs to be locked between different drivers */
DEFINE_SPINLOCK(ebu_lock);
EXPORT_SYMBOL_GPL(ebu_lock);
/*
* this struct is filled by the soc specific detection code and holds
* information about the specific soc type, revision and name
*/
static struct ltq_soc_info soc_info;
const char *get_system_type(void)
{
return soc_info.sys_type;
}
int ltq_soc_type(void)
{
return soc_info.type;
}
void __init prom_free_prom_memory(void)
{
}
static void __init prom_init_cmdline(void)
{
int argc = fw_arg0;
char **argv = (char **) KSEG1ADDR(fw_arg1);
int i;
arcs_cmdline[0] = '\0';
for (i = 0; i < argc; i++) {
char *p = (char *) KSEG1ADDR(argv[i]);
if (CPHYSADDR(p) && *p) {
strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
}
}
}
void __init plat_mem_setup(void)
{
ioport_resource.start = IOPORT_RESOURCE_START;
ioport_resource.end = IOPORT_RESOURCE_END;
iomem_resource.start = IOMEM_RESOURCE_START;
iomem_resource.end = IOMEM_RESOURCE_END;
set_io_port_base((unsigned long) KSEG1);
/*
* Load the builtin devicetree. This causes the chosen node to be
* parsed resulting in our memory appearing
*/
__dt_setup_arch(__dtb_start);
}
void __init device_tree_init(void)
{
unflatten_and_copy_device_tree();
}
void __init prom_init(void)
{
/* call the soc specific detetcion code and get it to fill soc_info */
ltq_soc_detect(&soc_info);
snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
soc_info.name, soc_info.rev_type);
soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
pr_info("SoC: %s\n", soc_info.sys_type);
prom_init_cmdline();
#if defined(CONFIG_MIPS_MT_SMP)
if (register_vsmp_smp_ops())
panic("failed to register_vsmp_smp_ops()");
#endif
}
int __init plat_of_setup(void)
{
return __dt_register_buses(soc_info.compatible, "simple-bus");
}
arch_initcall(plat_of_setup);