^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1995 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 1995 Waldorf Electronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 1996 Stoned Elipot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 1999 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/screen_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/initrd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/root_dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/pfn.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/kexec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/sizes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/dma-map-ops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/decompress/generic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/of_fdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/of_reserved_mem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <asm/addrspace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <asm/bootinfo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <asm/bugs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <asm/cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <asm/cdmm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <asm/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <asm/debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <asm/dma-coherence.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <asm/smp-ops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) const char __section(".appended_dtb") __appended_dtb[0x100000];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) EXPORT_SYMBOL(cpu_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #ifdef CONFIG_VT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct screen_info screen_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * Setup information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * These are initialized so they are in the .data section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) EXPORT_SYMBOL(mips_machtype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static char __initdata command_line[COMMAND_LINE_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #ifdef CONFIG_CMDLINE_BOOL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static const char builtin_cmdline[] __initconst = CONFIG_CMDLINE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static const char builtin_cmdline[] __initconst = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * mips_io_port_base is the begin of the address space to which x86 style
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * I/O ports are mapped.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) unsigned long mips_io_port_base = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) EXPORT_SYMBOL(mips_io_port_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static struct resource code_resource = { .name = "Kernel code", };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static struct resource data_resource = { .name = "Kernel data", };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static struct resource bss_resource = { .name = "Kernel bss", };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static void *detect_magic __initdata = detect_memory_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) unsigned long ARCH_PFN_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) EXPORT_SYMBOL(ARCH_PFN_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) void *dm = &detect_magic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) phys_addr_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) for (size = sz_min; size < sz_max; size <<= 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (!memcmp(dm, dm + size, sizeof(detect_magic)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) ((unsigned long long) size) / SZ_1M,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) (unsigned long long) start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ((unsigned long long) sz_min) / SZ_1M,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ((unsigned long long) sz_max) / SZ_1M);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) memblock_add(start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * Manage initrd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #ifdef CONFIG_BLK_DEV_INITRD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static int __init rd_start_early(char *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) unsigned long start = memparse(p, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #ifdef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /* Guess if the sign extension was forgotten by bootloader */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (start < XKPHYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) start = (int)start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) initrd_start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) initrd_end += start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) early_param("rd_start", rd_start_early);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int __init rd_size_early(char *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) initrd_end += memparse(p, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) early_param("rd_size", rd_size_early);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* it returns the next free pfn after initrd */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static unsigned long __init init_initrd(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) unsigned long end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * Board specific code or command line parser should have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * already set up initrd_start and initrd_end. In these cases
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * perfom sanity checks and use them if all looks good.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (!initrd_start || initrd_end <= initrd_start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) goto disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (initrd_start & ~PAGE_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) pr_err("initrd start must be page aligned\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) goto disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (initrd_start < PAGE_OFFSET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) pr_err("initrd start < PAGE_OFFSET\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) goto disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * Sanitize initrd addresses. For example firmware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * can't guess if they need to pass them through
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * 64-bits values if the kernel has been built in pure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * 32-bit. We need also to switch from KSEG0 to XKPHYS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * addresses now, so the code can now safely use __pa().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) end = __pa(initrd_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) initrd_end = (unsigned long)__va(end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) initrd_start = (unsigned long)__va(__pa(initrd_start));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) ROOT_DEV = Root_RAM0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return PFN_UP(end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) disable:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) initrd_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) initrd_end = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* In some conditions (e.g. big endian bootloader with a little endian
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) kernel), the initrd might appear byte swapped. Try to detect this and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) byte swap it if needed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static void __init maybe_bswap_initrd(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #if defined(CONFIG_CPU_CAVIUM_OCTEON)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) u64 buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /* Check for CPIO signature */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (!memcmp((void *)initrd_start, "070701", 6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* Check for compressed initrd */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (decompress_method((unsigned char *)initrd_start, 8, NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) /* Try again with a byte swapped header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) buf = swab64p((u64 *)initrd_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (!memcmp(&buf, "070701", 6) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) decompress_method((unsigned char *)(&buf), 8, NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) unsigned long i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) pr_info("Byteswapped initrd detected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) swab64s((u64 *)i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static void __init finalize_initrd(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) unsigned long size = initrd_end - initrd_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) printk(KERN_INFO "Initrd not found or empty");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) goto disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) printk(KERN_ERR "Initrd extends beyond end of memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) goto disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) maybe_bswap_initrd();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) memblock_reserve(__pa(initrd_start), size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) initrd_below_start_ok = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) initrd_start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) disable:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) printk(KERN_CONT " - disabling initrd\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) initrd_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) initrd_end = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) #else /* !CONFIG_BLK_DEV_INITRD */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static unsigned long __init init_initrd(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) #define finalize_initrd() do {} while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * Initialize the bootmem allocator. It also setup initrd related data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) * if needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON64) && defined(CONFIG_NUMA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static void __init bootmem_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) init_initrd();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) finalize_initrd();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) #else /* !CONFIG_SGI_IP27 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) static void __init bootmem_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) phys_addr_t ramstart, ramend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) unsigned long start, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) ramstart = memblock_start_of_DRAM();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) ramend = memblock_end_of_DRAM();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) * Sanity check any INITRD first. We don't take it into account
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * for bootmem setup initially, rely on the end-of-kernel-code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * as our memory range starting point. Once bootmem is inited we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * will reserve the area used for the initrd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) init_initrd();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) /* Reserve memory occupied by kernel. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) memblock_reserve(__pa_symbol(&_text),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) __pa_symbol(&_end) - __pa_symbol(&_text));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) /* max_low_pfn is not a number of pages but the end pfn of low mem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) #ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) ARCH_PFN_OFFSET = PFN_UP(ramstart);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) * Reserve any memory between the start of RAM and PHYS_OFFSET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (ramstart > PHYS_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (PFN_UP(ramstart) > ARCH_PFN_OFFSET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) (unsigned long)((PFN_UP(ramstart) - ARCH_PFN_OFFSET) * sizeof(struct page)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) (unsigned long)(PFN_UP(ramstart) - ARCH_PFN_OFFSET));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) min_low_pfn = ARCH_PFN_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) max_pfn = PFN_DOWN(ramend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * Skip highmem here so we get an accurate max_low_pfn if low
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * memory stops short of high memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * If the region overlaps HIGHMEM_START, end is clipped so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * max_pfn excludes the highmem portion.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (start >= PFN_DOWN(HIGHMEM_START))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (end > PFN_DOWN(HIGHMEM_START))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) end = PFN_DOWN(HIGHMEM_START);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (end > max_low_pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) max_low_pfn = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (min_low_pfn >= max_low_pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) panic("Incorrect memory mapping !!!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (max_pfn > PFN_DOWN(HIGHMEM_START)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) #ifdef CONFIG_HIGHMEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) highstart_pfn = PFN_DOWN(HIGHMEM_START);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) highend_pfn = max_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) max_low_pfn = PFN_DOWN(HIGHMEM_START);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) max_pfn = max_low_pfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * Reserve initrd memory if needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) finalize_initrd();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) #endif /* CONFIG_SGI_IP27 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) static int usermem __initdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static int __init early_parse_mem(char *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) phys_addr_t start, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) * If a user specifies memory size, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * blow away any automatically generated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (usermem == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) usermem = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) memblock_remove(memblock_start_of_DRAM(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) memblock_end_of_DRAM() - memblock_start_of_DRAM());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) size = memparse(p, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (*p == '@')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) start = memparse(p + 1, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) memblock_add(start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) early_param("mem", early_parse_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) static int __init early_parse_memmap(char *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) char *oldp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) u64 start_at, mem_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) if (!strncmp(p, "exactmap", 8)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) pr_err("\"memmap=exactmap\" invalid on MIPS\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) oldp = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) mem_size = memparse(p, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (p == oldp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (*p == '@') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) start_at = memparse(p+1, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) memblock_add(start_at, mem_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) } else if (*p == '#') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) } else if (*p == '$') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) start_at = memparse(p+1, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) memblock_add(start_at, mem_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) memblock_reserve(start_at, mem_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) pr_err("\"memmap\" invalid format!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (*p == '\0') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) usermem = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) early_param("memmap", early_parse_memmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) #ifdef CONFIG_PROC_VMCORE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) static int __init early_parse_elfcorehdr(char *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) phys_addr_t start, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) u64 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) setup_elfcorehdr = memparse(p, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) for_each_mem_range(i, &start, &end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * Reserve from the elf core header to the end of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * the memory segment, that should all be kdump
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * reserved memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) setup_elfcorehdr_size = end - setup_elfcorehdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * If we don't find it in the memory map, then we shouldn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * have to worry about it, as the new kernel won't use it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) early_param("elfcorehdr", early_parse_elfcorehdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) #ifdef CONFIG_KEXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) /* 64M alignment for crash kernel regions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) #define CRASH_ALIGN SZ_64M
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) #define CRASH_ADDR_MAX SZ_512M
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) static void __init mips_parse_crashkernel(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) unsigned long long total_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) unsigned long long crash_size, crash_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) total_mem = memblock_phys_mem_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) ret = parse_crashkernel(boot_command_line, total_mem,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) &crash_size, &crash_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) if (ret != 0 || crash_size <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) if (crash_base <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) crash_base = memblock_find_in_range(CRASH_ALIGN, CRASH_ADDR_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) crash_size, CRASH_ALIGN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (!crash_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) pr_warn("crashkernel reservation failed - No suitable area found.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) unsigned long long start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) start = memblock_find_in_range(crash_base, crash_base + crash_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) crash_size, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (start != crash_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) pr_warn("Invalid memory region reserved for crash kernel\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) crashk_res.start = crash_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) crashk_res.end = crash_base + crash_size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) static void __init request_crashkernel(struct resource *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (crashk_res.start == crashk_res.end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) ret = request_resource(res, &crashk_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) (unsigned long)(resource_size(&crashk_res) >> 20),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) (unsigned long)(crashk_res.start >> 20));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) #else /* !defined(CONFIG_KEXEC) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) static void __init mips_parse_crashkernel(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) static void __init request_crashkernel(struct resource *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) #endif /* !defined(CONFIG_KEXEC) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) static void __init check_kernel_sections_mem(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) phys_addr_t start = __pa_symbol(&_text);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) phys_addr_t size = __pa_symbol(&_end) - start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (!memblock_is_region_memory(start, size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) pr_info("Kernel sections are not in the memory maps\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) memblock_add(start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) static void __init bootcmdline_append(const char *s, size_t max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (!s[0] || !max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (boot_command_line[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) strlcat(boot_command_line, s, max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) #ifdef CONFIG_OF_EARLY_FLATTREE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) static int __init bootcmdline_scan_chosen(unsigned long node, const char *uname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) int depth, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) bool *dt_bootargs = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) const char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) int l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) if (depth != 1 || !data ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) p = of_get_flat_dt_prop(node, "bootargs", &l);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if (p != NULL && l > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) bootcmdline_append(p, min(l, COMMAND_LINE_SIZE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) *dt_bootargs = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) #endif /* CONFIG_OF_EARLY_FLATTREE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) static void __init bootcmdline_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) bool dt_bootargs = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * If CMDLINE_OVERRIDE is enabled then initializing the command line is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) * trivial - we simply use the built-in command line unconditionally &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) * unmodified.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) if (IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) * If the user specified a built-in command line &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) * prepended to arguments from the bootloader or DT so we'll copy them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * to the start of boot_command_line here. Otherwise, empty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * boot_command_line to undo anything early_init_dt_scan_chosen() did.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) boot_command_line[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) #ifdef CONFIG_OF_EARLY_FLATTREE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) * If we're configured to take boot arguments from DT, look for those
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) of_scan_flat_dt(bootcmdline_scan_chosen, &dt_bootargs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) * If we didn't get any arguments from DT (regardless of whether that's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) * because we weren't configured to look for them, or because we looked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) * & found none) then we'll take arguments from the bootloader.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) * plat_mem_setup() should have filled arcs_cmdline with arguments from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) * the bootloader.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) || !dt_bootargs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) bootcmdline_append(arcs_cmdline, COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) * If the user specified a built-in command line & we didn't already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * prepend it, we append it to boot_command_line here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (IS_ENABLED(CONFIG_CMDLINE_BOOL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) !IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) bootcmdline_append(builtin_cmdline, COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) * arch_mem_init - initialize memory management subsystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) * o plat_mem_setup() detects the memory configuration and will record detected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) * memory areas using memblock_add.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) * At this stage the memory configuration of the system is known to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) * kernel but generic memory management system is still entirely uninitialized.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) * o bootmem_init()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * o sparse_init()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * o paging_init()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * o dma_contiguous_reserve()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) * At this stage the bootmem allocator is ready to use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) * NOTE: historically plat_mem_setup did the entire platform initialization.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * This was rather impractical because it meant plat_mem_setup had to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * get away without any kind of memory allocator. To keep old code from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * breaking plat_setup was just renamed to plat_mem_setup and a second platform
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) * initialization hook for anything else was introduced.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) static void __init arch_mem_init(char **cmdline_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) /* call board setup routine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) plat_mem_setup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) memblock_set_bottom_up(true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) bootcmdline_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) *cmdline_p = command_line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) parse_early_param();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) if (usermem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) pr_info("User-defined physical RAM map overwrite\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) check_kernel_sections_mem();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) early_init_fdt_reserve_self();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) early_init_fdt_scan_reserved_mem();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) #ifndef CONFIG_NUMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) bootmem_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * Prevent memblock from allocating high memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) * This cannot be done before max_low_pfn is detected, so up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) * to this point is possible to only reserve physical memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) * with memblock_reserve; memblock_alloc* can be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) * only after this point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) memblock_set_current_limit(PFN_PHYS(max_low_pfn));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) #ifdef CONFIG_PROC_VMCORE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) if (setup_elfcorehdr && setup_elfcorehdr_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) setup_elfcorehdr, setup_elfcorehdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) memblock_reserve(setup_elfcorehdr, setup_elfcorehdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) mips_parse_crashkernel();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) #ifdef CONFIG_KEXEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) if (crashk_res.start != crashk_res.end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) memblock_reserve(crashk_res.start, resource_size(&crashk_res));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) device_tree_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) * In order to reduce the possibility of kernel panic when failed to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) * get IO TLB memory under CONFIG_SWIOTLB, it is better to allocate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) * low memory as small as possible before plat_swiotlb_setup(), so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) * make sparse_init() using top-down allocation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) memblock_set_bottom_up(false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) sparse_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) memblock_set_bottom_up(true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) plat_swiotlb_setup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) /* Reserve for hibernation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) memblock_reserve(__pa_symbol(&__nosave_begin),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) __pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) fdt_init_reserved_mem();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) memblock_dump_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) static void __init resource_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) phys_addr_t start, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) u64 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (UNCAC_BASE != IO_BASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) code_resource.start = __pa_symbol(&_text);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) code_resource.end = __pa_symbol(&_etext) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) data_resource.start = __pa_symbol(&_etext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) data_resource.end = __pa_symbol(&_edata) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) bss_resource.start = __pa_symbol(&__bss_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) bss_resource.end = __pa_symbol(&__bss_stop) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) for_each_mem_range(i, &start, &end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) panic("%s: Failed to allocate %zu bytes\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) sizeof(struct resource));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) res->start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) * In memblock, end points to the first byte after the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) * range while in resourses, end points to the last byte in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * the range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) res->end = end - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) res->name = "System RAM";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) request_resource(&iomem_resource, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) * We don't know which RAM region contains kernel data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) * so we try it repeatedly and let the resource manager
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) * test it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) request_resource(res, &code_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) request_resource(res, &data_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) request_resource(res, &bss_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) request_crashkernel(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) static void __init prefill_possible_map(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) int i, possible = num_possible_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) if (possible > nr_cpu_ids)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) possible = nr_cpu_ids;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) for (i = 0; i < possible; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) set_cpu_possible(i, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) for (; i < NR_CPUS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) set_cpu_possible(i, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) nr_cpu_ids = possible;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) static inline void prefill_possible_map(void) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) void __init setup_arch(char **cmdline_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) cpu_probe();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) mips_cm_probe();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) prom_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) setup_early_fdc_console();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) #ifdef CONFIG_EARLY_PRINTK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) setup_early_printk();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) cpu_report();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) check_bugs_early();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) #if defined(CONFIG_VT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) #if defined(CONFIG_VGA_CONSOLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) conswitchp = &vga_con;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) arch_mem_init(cmdline_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) dmi_setup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) resource_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) plat_smp_setup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) prefill_possible_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) cpu_cache_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) paging_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) unsigned long kernelsp[NR_CPUS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) #ifdef CONFIG_USE_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) unsigned long fw_passed_dtb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) #ifdef CONFIG_DEBUG_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) struct dentry *mips_debugfs_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) static int __init debugfs_mips(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) mips_debugfs_dir = debugfs_create_dir("mips", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) arch_initcall(debugfs_mips);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) #ifdef CONFIG_DMA_MAYBE_COHERENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) /* User defined DMA coherency from command line. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) enum coherent_io_user_state coherentio = IO_COHERENCE_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) EXPORT_SYMBOL_GPL(coherentio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) int hw_coherentio; /* Actual hardware supported DMA coherency setting. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) static int __init setcoherentio(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) coherentio = IO_COHERENCE_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) pr_info("Hardware DMA cache coherency (command line)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) early_param("coherentio", setcoherentio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) static int __init setnocoherentio(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) coherentio = IO_COHERENCE_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) pr_info("Software DMA cache coherency (command line)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) early_param("nocoherentio", setnocoherentio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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