15d1112070
RT5350 relies on the bootloader setting up the memc correctly. On some boards the setup is incorrect leading to 32 MB being available but only 16 MB being recognized. Allow these boards to manually override the memory range. Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/8004/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
|
|
* 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) 2008 Imre Kaloz <kaloz@openwrt.org>
|
|
* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
|
|
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#include <asm/reboot.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/addrspace.h>
|
|
#include <asm/prom.h>
|
|
|
|
#include "common.h"
|
|
|
|
__iomem void *rt_sysc_membase;
|
|
__iomem void *rt_memc_membase;
|
|
|
|
__iomem void *plat_of_remap_node(const char *node)
|
|
{
|
|
struct resource res;
|
|
struct device_node *np;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, node);
|
|
if (!np)
|
|
panic("Failed to find %s node", node);
|
|
|
|
if (of_address_to_resource(np, 0, &res))
|
|
panic("Failed to get resource for %s", node);
|
|
|
|
if ((request_mem_region(res.start,
|
|
resource_size(&res),
|
|
res.name) < 0))
|
|
panic("Failed to request resources for %s", node);
|
|
|
|
return ioremap_nocache(res.start, resource_size(&res));
|
|
}
|
|
|
|
void __init device_tree_init(void)
|
|
{
|
|
unflatten_and_copy_device_tree();
|
|
}
|
|
|
|
static int memory_dtb;
|
|
|
|
static int __init early_init_dt_find_memory(unsigned long node,
|
|
const char *uname, int depth, void *data)
|
|
{
|
|
if (depth == 1 && !strcmp(uname, "memory@0"))
|
|
memory_dtb = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __init plat_mem_setup(void)
|
|
{
|
|
set_io_port_base(KSEG1);
|
|
|
|
/*
|
|
* Load the builtin devicetree. This causes the chosen node to be
|
|
* parsed resulting in our memory appearing
|
|
*/
|
|
__dt_setup_arch(__dtb_start);
|
|
|
|
of_scan_flat_dt(early_init_dt_find_memory, NULL);
|
|
if (memory_dtb)
|
|
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
|
|
else if (soc_info.mem_size)
|
|
add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
|
|
BOOT_MEM_RAM);
|
|
else
|
|
detect_memory_region(soc_info.mem_base,
|
|
soc_info.mem_size_min * SZ_1M,
|
|
soc_info.mem_size_max * SZ_1M);
|
|
}
|
|
|
|
static int __init plat_of_setup(void)
|
|
{
|
|
__dt_register_buses(soc_info.compatible, "palmbus");
|
|
|
|
/* make sure that the reset controller is setup early */
|
|
ralink_rst_init();
|
|
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(plat_of_setup);
|