diff options
Diffstat (limited to 'kexec/arch/mips/kexec-mips.c')
| -rw-r--r-- | kexec/arch/mips/kexec-mips.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/kexec/arch/mips/kexec-mips.c b/kexec/arch/mips/kexec-mips.c new file mode 100644 index 0000000..d8cbea8 --- /dev/null +++ b/kexec/arch/mips/kexec-mips.c @@ -0,0 +1,191 @@ +/* + * kexec-mips.c - kexec for mips + * Copyright (C) 2007 Francesco Chiechi, Alessandro Rubini + * Copyright (C) 2007 Tvblob s.r.l. + * + * derived from ../ppc/kexec-ppc.c + * Copyright (C) 2004, 2005 Albert Herranz + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +#include <stddef.h> +#include <stdio.h> +#include <errno.h> +#include <stdint.h> +#include <string.h> +#include <getopt.h> +#include "../../kexec.h" +#include "../../kexec-syscall.h" +#include "kexec-mips.h" +#include <arch/options.h> + +/* Currently not used but required by top-level fs2dt code */ +off_t initrd_base = 0; +off_t initrd_size = 0; + +static struct memory_range memory_range[MAX_MEMORY_RANGES]; + +/* Return a sorted list of memory ranges. */ +int get_memory_ranges(struct memory_range **range, int *ranges, + unsigned long UNUSED(kexec_flags)) +{ + int memory_ranges = 0; + + const char iomem[] = "/proc/iomem"; + char line[MAX_LINE]; + FILE *fp; + unsigned long long start, end; + char *str; + int type, consumed, count; + + fp = fopen(iomem, "r"); + if (!fp) { + fprintf(stderr, "Cannot open %s: %s\n", iomem, strerror(errno)); + return -1; + } + while (fgets(line, sizeof(line), fp) != 0) { + if (memory_ranges >= MAX_MEMORY_RANGES) + break; + count = sscanf(line, "%llx-%llx : %n", &start, &end, &consumed); + if (count != 2) + continue; + str = line + consumed; + end = end + 1; + if (memcmp(str, "System RAM\n", 11) == 0) { + type = RANGE_RAM; + } else if (memcmp(str, "reserved\n", 9) == 0) { + type = RANGE_RESERVED; + } else { + continue; + } + if (memory_ranges > 0 && + memory_range[memory_ranges - 1].end == start && + memory_range[memory_ranges - 1].type == type) { + memory_range[memory_ranges - 1].end = end; + } else { + memory_range[memory_ranges].start = start; + memory_range[memory_ranges].end = end; + memory_range[memory_ranges].type = type; + memory_ranges++; + } + } + fclose(fp); + *range = memory_range; + *ranges = memory_ranges; + return 0; +} + +struct file_type file_type[] = { + {"elf-mips", elf_mips_probe, elf_mips_load, elf_mips_usage}, +}; +int file_types = sizeof(file_type) / sizeof(file_type[0]); + +void arch_usage(void) +{ + printf( + " --command-line=STRING Set the kernel command line to STRING.\n" + " --append=STRING Set the kernel command line to STRING.\n" + " --dtb=FILE Use FILE as the device tree blob.\n" + " --initrd=FILE Use FILE as initial ramdisk.\n" + " --reuse-cmdline Use kernel command line from running system.\n" + ); +} + +struct arch_options_t arch_options = { +#ifdef __mips64 + .core_header_type = CORE_TYPE_ELF64, +#else + .core_header_type = CORE_TYPE_ELF32, +#endif +}; + +int arch_process_options(int argc, char **argv) +{ + static const struct option options[] = { + KEXEC_ARCH_OPTIONS + { 0 }, + }; + static const char short_options[] = KEXEC_ARCH_OPT_STR; + int opt; + char *cmdline = NULL; + const char *append = NULL; + + while ((opt = getopt_long(argc, argv, short_options, + options, 0)) != -1) { + switch (opt) { + case OPT_APPEND: + append = optarg; + break; + case OPT_REUSE_CMDLINE: + cmdline = get_command_line(); + break; + case OPT_DTB: + arch_options.dtb_file = optarg; + break; + case OPT_RAMDISK: + arch_options.initrd_file = optarg; + break; + default: + break; + } + } + + arch_options.command_line = concat_cmdline(cmdline, append); + + dbgprintf("%s:%d: command_line: %s\n", __func__, __LINE__, + arch_options.command_line); + dbgprintf("%s:%d: initrd: %s\n", __func__, __LINE__, + arch_options.initrd_file); + dbgprintf("%s:%d: dtb: %s\n", __func__, __LINE__, + arch_options.dtb_file); + + return 0; +} + +const struct arch_map_entry arches[] = { + /* For compatibility with older patches + * use KEXEC_ARCH_DEFAULT instead of KEXEC_ARCH_MIPS here. + */ + { "mips", KEXEC_ARCH_MIPS }, + { "mips64", KEXEC_ARCH_MIPS }, + { NULL, 0 }, +}; + +int arch_compat_trampoline(struct kexec_info *UNUSED(info)) +{ + + return 0; +} + +void arch_update_purgatory(struct kexec_info *UNUSED(info)) +{ +} + +unsigned long virt_to_phys(unsigned long addr) +{ + return addr & 0x7fffffff; +} + +/* + * add_segment() should convert base to a physical address on mips, + * while the default is just to work with base as is */ +void add_segment(struct kexec_info *info, const void *buf, size_t bufsz, + unsigned long base, size_t memsz) +{ + add_segment_phys_virt(info, buf, bufsz, virt_to_phys(base), memsz, 1); +} + +/* + * add_buffer() should convert base to a physical address on mips, + * while the default is just to work with base as is */ +unsigned long add_buffer(struct kexec_info *info, const void *buf, + unsigned long bufsz, unsigned long memsz, + unsigned long buf_align, unsigned long buf_min, + unsigned long buf_max, int buf_end) +{ + return add_buffer_phys_virt(info, buf, bufsz, memsz, buf_align, + buf_min, buf_max, buf_end, 1); +} + |