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813 lines
20 KiB
813 lines
20 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 1995 Linus Torvalds |
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* Copyright (C) 1995 Waldorf Electronics |
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* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle |
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* Copyright (C) 1996 Stoned Elipot |
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* Copyright (C) 1999 Silicon Graphics, Inc. |
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* Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki |
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*/ |
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#include <linux/init.h> |
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#include <linux/ioport.h> |
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#include <linux/export.h> |
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#include <linux/screen_info.h> |
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#include <linux/memblock.h> |
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#include <linux/initrd.h> |
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#include <linux/root_dev.h> |
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#include <linux/highmem.h> |
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#include <linux/console.h> |
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#include <linux/pfn.h> |
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#include <linux/debugfs.h> |
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#include <linux/kexec.h> |
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#include <linux/sizes.h> |
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#include <linux/device.h> |
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#include <linux/dma-map-ops.h> |
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#include <linux/decompress/generic.h> |
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#include <linux/of_fdt.h> |
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#include <linux/dmi.h> |
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#include <linux/crash_dump.h> |
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|
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#include <asm/addrspace.h> |
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#include <asm/bootinfo.h> |
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#include <asm/bugs.h> |
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#include <asm/cache.h> |
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#include <asm/cdmm.h> |
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#include <asm/cpu.h> |
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#include <asm/debug.h> |
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#include <asm/sections.h> |
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#include <asm/setup.h> |
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#include <asm/smp-ops.h> |
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#include <asm/prom.h> |
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|
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#ifdef CONFIG_MIPS_ELF_APPENDED_DTB |
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char __section(".appended_dtb") __appended_dtb[0x100000]; |
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#endif /* CONFIG_MIPS_ELF_APPENDED_DTB */ |
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|
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struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
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|
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EXPORT_SYMBOL(cpu_data); |
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|
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#ifdef CONFIG_VT |
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struct screen_info screen_info; |
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#endif |
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|
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/* |
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* Setup information |
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* |
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* These are initialized so they are in the .data section |
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*/ |
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unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
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|
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EXPORT_SYMBOL(mips_machtype); |
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|
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static char __initdata command_line[COMMAND_LINE_SIZE]; |
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char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; |
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|
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#ifdef CONFIG_CMDLINE_BOOL |
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static const char builtin_cmdline[] __initconst = CONFIG_CMDLINE; |
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#else |
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static const char builtin_cmdline[] __initconst = ""; |
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#endif |
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|
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/* |
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* mips_io_port_base is the begin of the address space to which x86 style |
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* I/O ports are mapped. |
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*/ |
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unsigned long mips_io_port_base = -1; |
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EXPORT_SYMBOL(mips_io_port_base); |
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|
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static struct resource code_resource = { .name = "Kernel code", }; |
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static struct resource data_resource = { .name = "Kernel data", }; |
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static struct resource bss_resource = { .name = "Kernel bss", }; |
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|
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unsigned long __kaslr_offset __ro_after_init; |
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EXPORT_SYMBOL(__kaslr_offset); |
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static void *detect_magic __initdata = detect_memory_region; |
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#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET |
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unsigned long ARCH_PFN_OFFSET; |
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EXPORT_SYMBOL(ARCH_PFN_OFFSET); |
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#endif |
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void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max) |
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{ |
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void *dm = &detect_magic; |
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phys_addr_t size; |
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|
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for (size = sz_min; size < sz_max; size <<= 1) { |
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if (!memcmp(dm, dm + size, sizeof(detect_magic))) |
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break; |
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} |
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pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", |
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((unsigned long long) size) / SZ_1M, |
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(unsigned long long) start, |
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((unsigned long long) sz_min) / SZ_1M, |
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((unsigned long long) sz_max) / SZ_1M); |
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|
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memblock_add(start, size); |
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} |
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|
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/* |
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* Manage initrd |
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*/ |
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#ifdef CONFIG_BLK_DEV_INITRD |
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|
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static int __init rd_start_early(char *p) |
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{ |
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unsigned long start = memparse(p, &p); |
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|
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#ifdef CONFIG_64BIT |
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/* Guess if the sign extension was forgotten by bootloader */ |
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if (start < XKPHYS) |
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start = (int)start; |
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#endif |
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initrd_start = start; |
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initrd_end += start; |
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return 0; |
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} |
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early_param("rd_start", rd_start_early); |
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|
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static int __init rd_size_early(char *p) |
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{ |
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initrd_end += memparse(p, &p); |
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return 0; |
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} |
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early_param("rd_size", rd_size_early); |
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|
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/* it returns the next free pfn after initrd */ |
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static unsigned long __init init_initrd(void) |
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{ |
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unsigned long end; |
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|
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/* |
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* Board specific code or command line parser should have |
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* already set up initrd_start and initrd_end. In these cases |
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* perfom sanity checks and use them if all looks good. |
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*/ |
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if (!initrd_start || initrd_end <= initrd_start) |
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goto disable; |
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if (initrd_start & ~PAGE_MASK) { |
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pr_err("initrd start must be page aligned\n"); |
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goto disable; |
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} |
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if (initrd_start < PAGE_OFFSET) { |
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pr_err("initrd start < PAGE_OFFSET\n"); |
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goto disable; |
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} |
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/* |
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* Sanitize initrd addresses. For example firmware |
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* can't guess if they need to pass them through |
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* 64-bits values if the kernel has been built in pure |
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* 32-bit. We need also to switch from KSEG0 to XKPHYS |
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* addresses now, so the code can now safely use __pa(). |
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*/ |
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end = __pa(initrd_end); |
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initrd_end = (unsigned long)__va(end); |
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initrd_start = (unsigned long)__va(__pa(initrd_start)); |
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ROOT_DEV = Root_RAM0; |
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return PFN_UP(end); |
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disable: |
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initrd_start = 0; |
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initrd_end = 0; |
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return 0; |
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} |
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|
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/* In some conditions (e.g. big endian bootloader with a little endian |
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kernel), the initrd might appear byte swapped. Try to detect this and |
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byte swap it if needed. */ |
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static void __init maybe_bswap_initrd(void) |
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{ |
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#if defined(CONFIG_CPU_CAVIUM_OCTEON) |
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u64 buf; |
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/* Check for CPIO signature */ |
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if (!memcmp((void *)initrd_start, "070701", 6)) |
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return; |
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/* Check for compressed initrd */ |
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if (decompress_method((unsigned char *)initrd_start, 8, NULL)) |
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return; |
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/* Try again with a byte swapped header */ |
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buf = swab64p((u64 *)initrd_start); |
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if (!memcmp(&buf, "070701", 6) || |
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decompress_method((unsigned char *)(&buf), 8, NULL)) { |
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unsigned long i; |
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pr_info("Byteswapped initrd detected\n"); |
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for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8) |
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swab64s((u64 *)i); |
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} |
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#endif |
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} |
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static void __init finalize_initrd(void) |
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{ |
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unsigned long size = initrd_end - initrd_start; |
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if (size == 0) { |
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printk(KERN_INFO "Initrd not found or empty"); |
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goto disable; |
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} |
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if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
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printk(KERN_ERR "Initrd extends beyond end of memory"); |
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goto disable; |
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} |
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maybe_bswap_initrd(); |
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memblock_reserve(__pa(initrd_start), size); |
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initrd_below_start_ok = 1; |
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pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
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initrd_start, size); |
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return; |
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disable: |
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printk(KERN_CONT " - disabling initrd\n"); |
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initrd_start = 0; |
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initrd_end = 0; |
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} |
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#else /* !CONFIG_BLK_DEV_INITRD */ |
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static unsigned long __init init_initrd(void) |
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{ |
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return 0; |
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} |
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#define finalize_initrd() do {} while (0) |
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#endif |
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/* |
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* Initialize the bootmem allocator. It also setup initrd related data |
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* if needed. |
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*/ |
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#if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON64) && defined(CONFIG_NUMA)) |
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static void __init bootmem_init(void) |
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{ |
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init_initrd(); |
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finalize_initrd(); |
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} |
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#else /* !CONFIG_SGI_IP27 */ |
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static void __init bootmem_init(void) |
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{ |
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phys_addr_t ramstart, ramend; |
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unsigned long start, end; |
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int i; |
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ramstart = memblock_start_of_DRAM(); |
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ramend = memblock_end_of_DRAM(); |
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/* |
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* Sanity check any INITRD first. We don't take it into account |
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* for bootmem setup initially, rely on the end-of-kernel-code |
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* as our memory range starting point. Once bootmem is inited we |
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* will reserve the area used for the initrd. |
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*/ |
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init_initrd(); |
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/* Reserve memory occupied by kernel. */ |
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memblock_reserve(__pa_symbol(&_text), |
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__pa_symbol(&_end) - __pa_symbol(&_text)); |
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/* max_low_pfn is not a number of pages but the end pfn of low mem */ |
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#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET |
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ARCH_PFN_OFFSET = PFN_UP(ramstart); |
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#else |
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/* |
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* Reserve any memory between the start of RAM and PHYS_OFFSET |
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*/ |
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if (ramstart > PHYS_OFFSET) |
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memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET); |
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if (PFN_UP(ramstart) > ARCH_PFN_OFFSET) { |
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pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
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(unsigned long)((PFN_UP(ramstart) - ARCH_PFN_OFFSET) * sizeof(struct page)), |
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(unsigned long)(PFN_UP(ramstart) - ARCH_PFN_OFFSET)); |
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} |
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#endif |
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min_low_pfn = ARCH_PFN_OFFSET; |
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max_pfn = PFN_DOWN(ramend); |
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for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) { |
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/* |
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* Skip highmem here so we get an accurate max_low_pfn if low |
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* memory stops short of high memory. |
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* If the region overlaps HIGHMEM_START, end is clipped so |
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* max_pfn excludes the highmem portion. |
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*/ |
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if (start >= PFN_DOWN(HIGHMEM_START)) |
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continue; |
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if (end > PFN_DOWN(HIGHMEM_START)) |
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end = PFN_DOWN(HIGHMEM_START); |
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if (end > max_low_pfn) |
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max_low_pfn = end; |
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} |
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if (min_low_pfn >= max_low_pfn) |
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panic("Incorrect memory mapping !!!"); |
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if (max_pfn > PFN_DOWN(HIGHMEM_START)) { |
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#ifdef CONFIG_HIGHMEM |
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highstart_pfn = PFN_DOWN(HIGHMEM_START); |
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highend_pfn = max_pfn; |
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#else |
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max_low_pfn = PFN_DOWN(HIGHMEM_START); |
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max_pfn = max_low_pfn; |
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#endif |
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} |
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/* |
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* Reserve initrd memory if needed. |
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*/ |
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finalize_initrd(); |
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} |
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#endif /* CONFIG_SGI_IP27 */ |
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static int usermem __initdata; |
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static int __init early_parse_mem(char *p) |
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{ |
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phys_addr_t start, size; |
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|
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/* |
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* If a user specifies memory size, we |
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* blow away any automatically generated |
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* size. |
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*/ |
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if (usermem == 0) { |
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usermem = 1; |
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memblock_remove(memblock_start_of_DRAM(), |
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memblock_end_of_DRAM() - memblock_start_of_DRAM()); |
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} |
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start = 0; |
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size = memparse(p, &p); |
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if (*p == '@') |
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start = memparse(p + 1, &p); |
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memblock_add(start, size); |
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return 0; |
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} |
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early_param("mem", early_parse_mem); |
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|
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static int __init early_parse_memmap(char *p) |
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{ |
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char *oldp; |
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u64 start_at, mem_size; |
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if (!p) |
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return -EINVAL; |
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if (!strncmp(p, "exactmap", 8)) { |
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pr_err("\"memmap=exactmap\" invalid on MIPS\n"); |
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return 0; |
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} |
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oldp = p; |
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mem_size = memparse(p, &p); |
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if (p == oldp) |
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return -EINVAL; |
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if (*p == '@') { |
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start_at = memparse(p+1, &p); |
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memblock_add(start_at, mem_size); |
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} else if (*p == '#') { |
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pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n"); |
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return -EINVAL; |
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} else if (*p == '$') { |
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start_at = memparse(p+1, &p); |
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memblock_add(start_at, mem_size); |
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memblock_reserve(start_at, mem_size); |
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} else { |
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pr_err("\"memmap\" invalid format!\n"); |
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return -EINVAL; |
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} |
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if (*p == '\0') { |
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usermem = 1; |
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return 0; |
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} else |
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return -EINVAL; |
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} |
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early_param("memmap", early_parse_memmap); |
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|
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static void __init mips_reserve_vmcore(void) |
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{ |
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#ifdef CONFIG_PROC_VMCORE |
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phys_addr_t start, end; |
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u64 i; |
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|
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if (!elfcorehdr_size) { |
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for_each_mem_range(i, &start, &end) { |
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if (elfcorehdr_addr >= start && elfcorehdr_addr < end) { |
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/* |
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* Reserve from the elf core header to the end of |
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* the memory segment, that should all be kdump |
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* reserved memory. |
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*/ |
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elfcorehdr_size = end - elfcorehdr_addr; |
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break; |
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} |
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} |
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} |
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pr_info("Reserving %ldKB of memory at %ldKB for kdump\n", |
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(unsigned long)elfcorehdr_size >> 10, (unsigned long)elfcorehdr_addr >> 10); |
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memblock_reserve(elfcorehdr_addr, elfcorehdr_size); |
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#endif |
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} |
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#ifdef CONFIG_KEXEC |
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|
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/* 64M alignment for crash kernel regions */ |
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#define CRASH_ALIGN SZ_64M |
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#define CRASH_ADDR_MAX SZ_512M |
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|
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static void __init mips_parse_crashkernel(void) |
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{ |
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unsigned long long total_mem; |
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unsigned long long crash_size, crash_base; |
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int ret; |
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total_mem = memblock_phys_mem_size(); |
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ret = parse_crashkernel(boot_command_line, total_mem, |
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&crash_size, &crash_base); |
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if (ret != 0 || crash_size <= 0) |
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return; |
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if (crash_base <= 0) { |
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crash_base = memblock_find_in_range(CRASH_ALIGN, CRASH_ADDR_MAX, |
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crash_size, CRASH_ALIGN); |
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if (!crash_base) { |
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pr_warn("crashkernel reservation failed - No suitable area found.\n"); |
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return; |
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} |
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} else { |
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unsigned long long start; |
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|
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start = memblock_find_in_range(crash_base, crash_base + crash_size, |
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crash_size, 1); |
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if (start != crash_base) { |
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pr_warn("Invalid memory region reserved for crash kernel\n"); |
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return; |
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} |
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} |
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crashk_res.start = crash_base; |
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crashk_res.end = crash_base + crash_size - 1; |
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} |
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static void __init request_crashkernel(struct resource *res) |
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{ |
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int ret; |
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|
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if (crashk_res.start == crashk_res.end) |
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return; |
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ret = request_resource(res, &crashk_res); |
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if (!ret) |
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pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", |
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(unsigned long)(resource_size(&crashk_res) >> 20), |
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(unsigned long)(crashk_res.start >> 20)); |
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} |
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#else /* !defined(CONFIG_KEXEC) */ |
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static void __init mips_parse_crashkernel(void) |
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{ |
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} |
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|
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static void __init request_crashkernel(struct resource *res) |
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{ |
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} |
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#endif /* !defined(CONFIG_KEXEC) */ |
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|
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static void __init check_kernel_sections_mem(void) |
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{ |
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phys_addr_t start = __pa_symbol(&_text); |
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phys_addr_t size = __pa_symbol(&_end) - start; |
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|
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if (!memblock_is_region_memory(start, size)) { |
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pr_info("Kernel sections are not in the memory maps\n"); |
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memblock_add(start, size); |
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} |
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} |
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|
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static void __init bootcmdline_append(const char *s, size_t max) |
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{ |
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if (!s[0] || !max) |
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return; |
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|
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if (boot_command_line[0]) |
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strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
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|
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strlcat(boot_command_line, s, max); |
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} |
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|
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#ifdef CONFIG_OF_EARLY_FLATTREE |
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|
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static int __init bootcmdline_scan_chosen(unsigned long node, const char *uname, |
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int depth, void *data) |
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{ |
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bool *dt_bootargs = data; |
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const char *p; |
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int l; |
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|
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if (depth != 1 || !data || |
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(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0)) |
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return 0; |
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|
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p = of_get_flat_dt_prop(node, "bootargs", &l); |
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if (p != NULL && l > 0) { |
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bootcmdline_append(p, min(l, COMMAND_LINE_SIZE)); |
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*dt_bootargs = true; |
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} |
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|
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return 1; |
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} |
|
|
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#endif /* CONFIG_OF_EARLY_FLATTREE */ |
|
|
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static void __init bootcmdline_init(void) |
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{ |
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bool dt_bootargs = false; |
|
|
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/* |
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* If CMDLINE_OVERRIDE is enabled then initializing the command line is |
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* trivial - we simply use the built-in command line unconditionally & |
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* unmodified. |
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*/ |
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if (IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) { |
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strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
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return; |
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} |
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|
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/* |
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* If the user specified a built-in command line & |
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* MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is |
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* prepended to arguments from the bootloader or DT so we'll copy them |
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* to the start of boot_command_line here. Otherwise, empty |
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* boot_command_line to undo anything early_init_dt_scan_chosen() did. |
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*/ |
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if (IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)) |
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strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
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else |
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boot_command_line[0] = 0; |
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|
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#ifdef CONFIG_OF_EARLY_FLATTREE |
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/* |
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* If we're configured to take boot arguments from DT, look for those |
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* now. |
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*/ |
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if (IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) || |
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IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND)) |
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of_scan_flat_dt(bootcmdline_scan_chosen, &dt_bootargs); |
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#endif |
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|
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/* |
|
* If we didn't get any arguments from DT (regardless of whether that's |
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* because we weren't configured to look for them, or because we looked |
|
* & found none) then we'll take arguments from the bootloader. |
|
* plat_mem_setup() should have filled arcs_cmdline with arguments from |
|
* the bootloader. |
|
*/ |
|
if (IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) || !dt_bootargs) |
|
bootcmdline_append(arcs_cmdline, COMMAND_LINE_SIZE); |
|
|
|
/* |
|
* If the user specified a built-in command line & we didn't already |
|
* prepend it, we append it to boot_command_line here. |
|
*/ |
|
if (IS_ENABLED(CONFIG_CMDLINE_BOOL) && |
|
!IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)) |
|
bootcmdline_append(builtin_cmdline, COMMAND_LINE_SIZE); |
|
} |
|
|
|
/* |
|
* arch_mem_init - initialize memory management subsystem |
|
* |
|
* o plat_mem_setup() detects the memory configuration and will record detected |
|
* memory areas using memblock_add. |
|
* |
|
* At this stage the memory configuration of the system is known to the |
|
* kernel but generic memory management system is still entirely uninitialized. |
|
* |
|
* o bootmem_init() |
|
* o sparse_init() |
|
* o paging_init() |
|
* o dma_contiguous_reserve() |
|
* |
|
* At this stage the bootmem allocator is ready to use. |
|
* |
|
* NOTE: historically plat_mem_setup did the entire platform initialization. |
|
* This was rather impractical because it meant plat_mem_setup had to |
|
* get away without any kind of memory allocator. To keep old code from |
|
* breaking plat_setup was just renamed to plat_mem_setup and a second platform |
|
* initialization hook for anything else was introduced. |
|
*/ |
|
static void __init arch_mem_init(char **cmdline_p) |
|
{ |
|
/* call board setup routine */ |
|
plat_mem_setup(); |
|
memblock_set_bottom_up(true); |
|
|
|
bootcmdline_init(); |
|
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
|
*cmdline_p = command_line; |
|
|
|
parse_early_param(); |
|
|
|
if (usermem) |
|
pr_info("User-defined physical RAM map overwrite\n"); |
|
|
|
check_kernel_sections_mem(); |
|
|
|
early_init_fdt_reserve_self(); |
|
early_init_fdt_scan_reserved_mem(); |
|
|
|
#ifndef CONFIG_NUMA |
|
memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0); |
|
#endif |
|
bootmem_init(); |
|
|
|
/* |
|
* Prevent memblock from allocating high memory. |
|
* This cannot be done before max_low_pfn is detected, so up |
|
* to this point is possible to only reserve physical memory |
|
* with memblock_reserve; memblock_alloc* can be used |
|
* only after this point |
|
*/ |
|
memblock_set_current_limit(PFN_PHYS(max_low_pfn)); |
|
|
|
mips_reserve_vmcore(); |
|
|
|
mips_parse_crashkernel(); |
|
#ifdef CONFIG_KEXEC |
|
if (crashk_res.start != crashk_res.end) |
|
memblock_reserve(crashk_res.start, resource_size(&crashk_res)); |
|
#endif |
|
device_tree_init(); |
|
|
|
/* |
|
* In order to reduce the possibility of kernel panic when failed to |
|
* get IO TLB memory under CONFIG_SWIOTLB, it is better to allocate |
|
* low memory as small as possible before plat_swiotlb_setup(), so |
|
* make sparse_init() using top-down allocation. |
|
*/ |
|
memblock_set_bottom_up(false); |
|
sparse_init(); |
|
memblock_set_bottom_up(true); |
|
|
|
plat_swiotlb_setup(); |
|
|
|
dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); |
|
|
|
/* Reserve for hibernation. */ |
|
memblock_reserve(__pa_symbol(&__nosave_begin), |
|
__pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin)); |
|
|
|
early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn)); |
|
} |
|
|
|
static void __init resource_init(void) |
|
{ |
|
phys_addr_t start, end; |
|
u64 i; |
|
|
|
if (UNCAC_BASE != IO_BASE) |
|
return; |
|
|
|
code_resource.start = __pa_symbol(&_text); |
|
code_resource.end = __pa_symbol(&_etext) - 1; |
|
data_resource.start = __pa_symbol(&_etext); |
|
data_resource.end = __pa_symbol(&_edata) - 1; |
|
bss_resource.start = __pa_symbol(&__bss_start); |
|
bss_resource.end = __pa_symbol(&__bss_stop) - 1; |
|
|
|
for_each_mem_range(i, &start, &end) { |
|
struct resource *res; |
|
|
|
res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES); |
|
if (!res) |
|
panic("%s: Failed to allocate %zu bytes\n", __func__, |
|
sizeof(struct resource)); |
|
|
|
res->start = start; |
|
/* |
|
* In memblock, end points to the first byte after the |
|
* range while in resourses, end points to the last byte in |
|
* the range. |
|
*/ |
|
res->end = end - 1; |
|
res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; |
|
res->name = "System RAM"; |
|
|
|
request_resource(&iomem_resource, res); |
|
|
|
/* |
|
* We don't know which RAM region contains kernel data, |
|
* so we try it repeatedly and let the resource manager |
|
* test it. |
|
*/ |
|
request_resource(res, &code_resource); |
|
request_resource(res, &data_resource); |
|
request_resource(res, &bss_resource); |
|
request_crashkernel(res); |
|
} |
|
} |
|
|
|
#ifdef CONFIG_SMP |
|
static void __init prefill_possible_map(void) |
|
{ |
|
int i, possible = num_possible_cpus(); |
|
|
|
if (possible > nr_cpu_ids) |
|
possible = nr_cpu_ids; |
|
|
|
for (i = 0; i < possible; i++) |
|
set_cpu_possible(i, true); |
|
for (; i < NR_CPUS; i++) |
|
set_cpu_possible(i, false); |
|
|
|
nr_cpu_ids = possible; |
|
} |
|
#else |
|
static inline void prefill_possible_map(void) {} |
|
#endif |
|
|
|
void __init setup_arch(char **cmdline_p) |
|
{ |
|
cpu_probe(); |
|
mips_cm_probe(); |
|
prom_init(); |
|
|
|
setup_early_fdc_console(); |
|
#ifdef CONFIG_EARLY_PRINTK |
|
setup_early_printk(); |
|
#endif |
|
cpu_report(); |
|
check_bugs_early(); |
|
|
|
#if defined(CONFIG_VT) |
|
#if defined(CONFIG_VGA_CONSOLE) |
|
conswitchp = &vga_con; |
|
#endif |
|
#endif |
|
|
|
arch_mem_init(cmdline_p); |
|
dmi_setup(); |
|
|
|
resource_init(); |
|
plat_smp_setup(); |
|
prefill_possible_map(); |
|
|
|
cpu_cache_init(); |
|
paging_init(); |
|
|
|
memblock_dump_all(); |
|
} |
|
|
|
unsigned long kernelsp[NR_CPUS]; |
|
unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; |
|
|
|
#ifdef CONFIG_DEBUG_FS |
|
struct dentry *mips_debugfs_dir; |
|
static int __init debugfs_mips(void) |
|
{ |
|
mips_debugfs_dir = debugfs_create_dir("mips", NULL); |
|
return 0; |
|
} |
|
arch_initcall(debugfs_mips); |
|
#endif |
|
|
|
#ifdef CONFIG_DMA_NONCOHERENT |
|
static int __init setcoherentio(char *str) |
|
{ |
|
dma_default_coherent = true; |
|
pr_info("Hardware DMA cache coherency (command line)\n"); |
|
return 0; |
|
} |
|
early_param("coherentio", setcoherentio); |
|
|
|
static int __init setnocoherentio(char *str) |
|
{ |
|
dma_default_coherent = true; |
|
pr_info("Software DMA cache coherency (command line)\n"); |
|
return 0; |
|
} |
|
early_param("nocoherentio", setnocoherentio); |
|
#endif
|
|
|