/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995 Linus Torvalds
* Copyright (C) 1995 Waldorf Electronics
* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle
* Copyright (C) 1996 Stoned Elipot
* Copyright (C) 1999 Silicon Graphics, Inc.
* Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki
*/
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/export.h>
#include <linux/screen_info.h>
#include <linux/memblock.h>
#include <linux/initrd.h>
#include <linux/root_dev.h>
#include <linux/highmem.h>
#include <linux/console.h>
#include <linux/pfn.h>
#include <linux/debugfs.h>
#include <linux/kexec.h>
#include <linux/sizes.h>
#include <linux/device.h>
#include <linux/dma-contiguous.h>
#include <linux/decompress/generic.h>
#include <linux/of_fdt.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>
#include <asm/bugs.h>
#include <asm/cache.h>
#include <asm/cdmm.h>
#include <asm/cpu.h>
#include <asm/debug.h>
#include <asm/dma-coherence.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/smp-ops.h>
#include <asm/prom.h>
#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
const char __section(.appended_dtb) __appended_dtb[0x100000];
#endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(cpu_data);
#ifdef CONFIG_VT
struct screen_info screen_info;
#endif
/*
* Setup information
*
* These are initialized so they are in the .data section
*/
unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
EXPORT_SYMBOL(mips_machtype);
struct boot_mem_map boot_mem_map;
static char __initdata command_line[COMMAND_LINE_SIZE];
char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
#ifdef CONFIG_CMDLINE_BOOL
static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
#endif
/*
* mips_io_port_base is the begin of the address space to which x86 style
* I/O ports are mapped.
*/
const unsigned long mips_io_port_base = -1;
EXPORT_SYMBOL(mips_io_port_base);
static struct resource code_resource = { .name = "Kernel code", };
static struct resource data_resource = { .name = "Kernel data", };
static struct resource bss_resource = { .name = "Kernel bss", };
static void *detect_magic __initdata = detect_memory_region;
#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
unsigned long ARCH_PFN_OFFSET;
EXPORT_SYMBOL(ARCH_PFN_OFFSET);
#endif
void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
{
int x = boot_mem_map.nr_map;
int i;
/*
* If the region reaches the top of the physical address space, adjust
* the size slightly so that (start + size) doesn't overflow
*/
if (start + size - 1 == PHYS_ADDR_MAX)
--size;
/* Sanity check */
if (start + size < start) {
pr_warn("Trying to add an invalid memory region, skipped\n");
return;
}
/*
* Try to merge with existing entry, if any.
*/
for (i = 0; i < boot_mem_map.nr_map; i++) {
struct boot_mem_map_entry *entry = boot_mem_map.map + i;
unsigned long top;
if (entry->type != type)
continue;
if (start + size < entry->addr)
continue; /* no overlap */
if (entry->addr + entry->size < start)
continue; /* no overlap */
top = max(entry->addr + entry->size, start + size);
entry->addr = min(entry->addr, start);
entry->size = top - entry->addr;
return;
}
if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) {
pr_err("Ooops! Too many entries in the memory map!\n");
return;
}
boot_mem_map.map[x].addr = start;
boot_mem_map.map[x].size = size;
boot_mem_map.map[x].type = type;
boot_mem_map.nr_map++;
}
void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max)
{
void *dm = &detect_magic;
phys_addr_t size;
for (size = sz_min; size < sz_max; size <<= 1) {
if (!memcmp(dm, dm + size, sizeof(detect_magic)))
break;
}
pr_debug("Memory: %lluMB of R