812 lines
20 KiB
C
812 lines
20 KiB
C
/*
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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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#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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#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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struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
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EXPORT_SYMBOL(cpu_data);
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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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* 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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EXPORT_SYMBOL(mips_machtype);
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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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#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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* 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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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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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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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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memblock_add(start, size);
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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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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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#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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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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/* 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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* 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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/* 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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* 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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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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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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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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/* 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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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_phys_alloc_range(crash_size, CRASH_ALIGN,
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CRASH_ALIGN,
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CRASH_ADDR_MAX);
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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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start = memblock_phys_alloc_range(crash_size, 1,
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crash_base,
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crash_base + crash_size);
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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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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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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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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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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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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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if (boot_command_line[0])
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strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
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strlcat(boot_command_line, s, max);
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}
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#ifdef CONFIG_OF_EARLY_FLATTREE
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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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if (depth != 1 || !data ||
|
|
(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
|
|
return 0;
|
|
|
|
p = of_get_flat_dt_prop(node, "bootargs", &l);
|
|
if (p != NULL && l > 0) {
|
|
bootcmdline_append(p, min(l, COMMAND_LINE_SIZE));
|
|
*dt_bootargs = true;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
#endif /* CONFIG_OF_EARLY_FLATTREE */
|
|
|
|
static void __init bootcmdline_init(void)
|
|
{
|
|
bool dt_bootargs = false;
|
|
|
|
/*
|
|
* If CMDLINE_OVERRIDE is enabled then initializing the command line is
|
|
* trivial - we simply use the built-in command line unconditionally &
|
|
* unmodified.
|
|
*/
|
|
if (IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
|
|
strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If the user specified a built-in command line &
|
|
* MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is
|
|
* prepended to arguments from the bootloader or DT so we'll copy them
|
|
* to the start of boot_command_line here. Otherwise, empty
|
|
* boot_command_line to undo anything early_init_dt_scan_chosen() did.
|
|
*/
|
|
if (IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
|
|
strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
|
|
else
|
|
boot_command_line[0] = 0;
|
|
|
|
#ifdef CONFIG_OF_EARLY_FLATTREE
|
|
/*
|
|
* If we're configured to take boot arguments from DT, look for those
|
|
* now.
|
|
*/
|
|
if (IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) ||
|
|
IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND))
|
|
of_scan_flat_dt(bootcmdline_scan_chosen, &dt_bootargs);
|
|
#endif
|
|
|
|
/*
|
|
* If we didn't get any arguments from DT (regardless of whether that's
|
|
* 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();
|
|
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
|