diff options
Diffstat (limited to 'kexec/arch/sh/crashdump-sh.c')
| -rw-r--r-- | kexec/arch/sh/crashdump-sh.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/kexec/arch/sh/crashdump-sh.c b/kexec/arch/sh/crashdump-sh.c new file mode 100644 index 0000000..36e9aaf --- /dev/null +++ b/kexec/arch/sh/crashdump-sh.c @@ -0,0 +1,166 @@ +/* + * crashdump-sh.c - crashdump for SuperH + * Copyright (C) 2008 Magnus Damm + * + * Based on x86 and ppc64 implementation, written by + * Vivek Goyal (vgoyal@in.ibm.com), R Sharada (sharada@in.ibm.com) + * Copyright (C) IBM Corporation, 2005. All rights reserved + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +#define _GNU_SOURCE +#include <stddef.h> +#include <stdio.h> +#include <errno.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <elf.h> +#include "../../kexec.h" +#include "../../kexec-elf.h" +#include "../../kexec-elf-boot.h" +#include "../../kexec-syscall.h" +#include "../../crashdump.h" +#include "kexec-sh.h" +#include "crashdump-sh.h" +#include <arch/options.h> + +#define CRASH_MAX_MEMORY_RANGES 64 +static struct memory_range crash_memory_range[CRASH_MAX_MEMORY_RANGES]; + +static int crash_sh_range_nr; +static int crash_sh_memory_range_callback(void *UNUSED(data), int UNUSED(nr), + char *str, + unsigned long long base, + unsigned long long length) +{ + + struct memory_range *range = crash_memory_range; + struct memory_range *range2 = crash_memory_range; + + range += crash_sh_range_nr; + + if (crash_sh_range_nr >= CRASH_MAX_MEMORY_RANGES) { + return 1; + } + + if (strncmp(str, "System RAM\n", 11) == 0) { + range->start = base; + range->end = base + length - 1; + range->type = RANGE_RAM; + crash_sh_range_nr++; + } + + if (strncmp(str, "Crash kernel\n", 13) == 0) { + if (!crash_sh_range_nr) + die("Unsupported /proc/iomem format\n"); + + range2 = range - 1; + if ((base + length - 1) < range2->end) { + range->start = base + length; + range->end = range2->end; + range->type = RANGE_RAM; + crash_sh_range_nr++; + } + range2->end = base - 1; + } + + return 0; +} + +/* Return a sorted list of available memory ranges. */ +static int crash_get_memory_ranges(struct memory_range **range, int *ranges) +{ + crash_sh_range_nr = 0; + + kexec_iomem_for_each_line(NULL, crash_sh_memory_range_callback, NULL); + *range = crash_memory_range; + *ranges = crash_sh_range_nr; + return 0; +} + +static struct crash_elf_info elf_info32 = +{ + class: ELFCLASS32, + data: ELFDATA2LSB, + machine: EM_SH, + page_offset: PAGE_OFFSET, +}; + +static int add_cmdline_param(char *cmdline, uint64_t addr, char *cmdstr, + char *byte) +{ + int cmdlen, len, align = 1024; + char str[COMMAND_LINE_SIZE], *ptr; + + /* Passing in =xxxK / =xxxM format. Saves space required in cmdline.*/ + switch (byte[0]) { + case 'K': + if (addr%align) + return -1; + addr = addr/align; + break; + case 'M': + addr = addr/(align *align); + break; + } + ptr = str; + strcpy(str, cmdstr); + ptr += strlen(str); + ultoa(addr, ptr); + strcat(str, byte); + len = strlen(str); + cmdlen = strlen(cmdline) + len; + if (cmdlen > (COMMAND_LINE_SIZE - 1)) + die("Command line overflow\n"); + strcat(cmdline, str); + + dbgprintf("Command line after adding elfcorehdr: %s\n", cmdline); + + return 0; +} + +/* Loads additional segments in case of a panic kernel is being loaded. + * One segment for storing elf headers for crash memory image. + */ +int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline) +{ + void *tmp; + unsigned long sz, elfcorehdr; + int nr_ranges; + struct memory_range *mem_range; + + if (crash_get_memory_ranges(&mem_range, &nr_ranges) < 0) + return -1; + + if (crash_create_elf32_headers(info, &elf_info32, + mem_range, nr_ranges, + &tmp, &sz, + ELF_CORE_HEADER_ALIGN) < 0) + return -1; + + elfcorehdr = add_buffer_phys_virt(info, tmp, sz, sz, 1024, + 0, 0xffffffff, -1, 0); + + dbgprintf("Created elf header segment at 0x%lx\n", elfcorehdr); + add_cmdline_param(mod_cmdline, elfcorehdr, " elfcorehdr=", "K"); + add_cmdline_param(mod_cmdline, elfcorehdr - mem_min, " mem=", "K"); + + return 0; +} + +int is_crashkernel_mem_reserved(void) +{ + uint64_t start, end; + + return parse_iomem_single("Crash kernel\n", &start, &end) == 0 ? + (start != end) : 0; +} + +int get_crash_kernel_load_range(uint64_t *start, uint64_t *end) +{ + return parse_iomem_single("Crash kernel\n", start, end); +} |