From 631c2b9fc4978685885a826788ba05a5329c6418 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sat, 5 Sep 2020 14:50:50 -0600 Subject: [PATCH] x86: zboot: Add an option to dump the setup information There is a lot of information in the setup block and it is quite hard to decode manually. Add a 'zboot dump' command to decode it into a human-readable format. Signed-off-by: Simon Glass Reviewed-by: Wolfgang Wallner Reviewed-by: Bin Meng --- arch/x86/include/asm/e820.h | 1 + arch/x86/lib/zimage.c | 199 +++++++++++++++++++++++++++++++++++- 2 files changed, 199 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h index 9d29f82f97..d7f8a4ba1d 100644 --- a/arch/x86/include/asm/e820.h +++ b/arch/x86/include/asm/e820.h @@ -8,6 +8,7 @@ #define E820_ACPI 3 #define E820_NVS 4 #define E820_UNUSABLE 5 +#define E820_COUNT 6 /* Number of types */ #ifndef __ASSEMBLY__ #include diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c index 544f172d76..1a4094aa02 100644 --- a/arch/x86/lib/zimage.c +++ b/arch/x86/lib/zimage.c @@ -73,6 +73,8 @@ enum { ZBOOT_STATE_INFO = BIT(3), ZBOOT_STATE_GO = BIT(4), + /* This one doesn't execute automatically, so stop the count before 5 */ + ZBOOT_STATE_DUMP = BIT(5), ZBOOT_STATE_COUNT = 5, }; @@ -458,6 +460,199 @@ static int do_zboot_go(struct cmd_tbl *cmdtp, int flag, int argc, return CMD_RET_FAILURE; } +static void print_num(const char *name, ulong value) +{ + printf("%-20s: %lx\n", name, value); +} + +static void print_num64(const char *name, u64 value) +{ + printf("%-20s: %llx\n", name, value); +} + +static const char *const e820_type_name[E820_COUNT] = { + [E820_RAM] = "RAM", + [E820_RESERVED] = "Reserved", + [E820_ACPI] = "ACPI", + [E820_NVS] = "ACPI NVS", + [E820_UNUSABLE] = "Unusable", +}; + +static const char *const bootloader_id[] = { + "LILO", + "Loadlin", + "bootsect-loader", + "Syslinux", + "Etherboot/gPXE/iPXE", + "ELILO", + "undefined", + "GRUB", + "U-Boot", + "Xen", + "Gujin", + "Qemu", + "Arcturus Networks uCbootloader", + "kexec-tools", + "Extended", + "Special", + "Reserved", + "Minimal Linux Bootloader", + "OVMF UEFI virtualization stack", +}; + +struct flag_info { + uint bit; + const char *name; +}; + +static struct flag_info load_flags[] = { + { LOADED_HIGH, "loaded-high" }, + { QUIET_FLAG, "quiet" }, + { KEEP_SEGMENTS, "keep-segments" }, + { CAN_USE_HEAP, "can-use-heap" }, +}; + +static struct flag_info xload_flags[] = { + { XLF_KERNEL_64, "64-bit-entry" }, + { XLF_CAN_BE_LOADED_ABOVE_4G, "can-load-above-4gb" }, + { XLF_EFI_HANDOVER_32, "32-efi-handoff" }, + { XLF_EFI_HANDOVER_64, "64-efi-handoff" }, + { XLF_EFI_KEXEC, "kexec-efi-runtime" }, +}; + +static void print_flags(struct flag_info *flags, int count, uint value) +{ + int i; + + printf("%-20s:", ""); + for (i = 0; i < count; i++) { + uint mask = flags[i].bit; + + if (value & mask) + printf(" %s", flags[i].name); + } + printf("\n"); +} + +static void show_loader(struct setup_header *hdr) +{ + bool version_valid = false; + int type, version; + const char *name; + + type = hdr->type_of_loader >> 4; + version = hdr->type_of_loader & 0xf; + if (type == 0xe) + type = 0x10 + hdr->ext_loader_type; + version |= hdr->ext_loader_ver << 4; + if (!hdr->type_of_loader) { + name = "pre-2.00 bootloader"; + } else if (hdr->type_of_loader == 0xff) { + name = "unknown"; + } else if (type < ARRAY_SIZE(bootloader_id)) { + name = bootloader_id[type]; + version_valid = true; + } else { + name = "undefined"; + } + printf("%20s %s", "", name); + if (version_valid) + printf(", version %x", version); + printf("\n"); +} + +int do_zboot_dump(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) +{ + struct boot_params *base_ptr = state.base_ptr; + struct setup_header *hdr; + const char *version; + int i; + + if (argc > 1) + base_ptr = (void *)simple_strtoul(argv[1], NULL, 16); + if (!base_ptr) { + printf("No zboot setup_base\n"); + return CMD_RET_FAILURE; + } + printf("Setup located at %p:\n\n", base_ptr); + print_num64("ACPI RSDP addr", base_ptr->acpi_rsdp_addr); + + printf("E820: %d entries\n", base_ptr->e820_entries); + if (base_ptr->e820_entries) { + printf("%18s %16s %s\n", "Addr", "Size", "Type"); + for (i = 0; i < base_ptr->e820_entries; i++) { + struct e820_entry *entry = &base_ptr->e820_map[i]; + + printf("%12llx %10llx %s\n", entry->addr, entry->size, + entry->type < E820_COUNT ? + e820_type_name[entry->type] : + simple_itoa(entry->type)); + } + } + + hdr = &base_ptr->hdr; + print_num("Setup sectors", hdr->setup_sects); + print_num("Root flags", hdr->root_flags); + print_num("Sys size", hdr->syssize); + print_num("RAM size", hdr->ram_size); + print_num("Video mode", hdr->vid_mode); + print_num("Root dev", hdr->root_dev); + print_num("Boot flag", hdr->boot_flag); + print_num("Jump", hdr->jump); + print_num("Header", hdr->header); + if (hdr->header == KERNEL_V2_MAGIC) + printf("%-20s %s\n", "", "Kernel V2"); + else + printf("%-20s %s\n", "", "Ancient kernel, using version 100"); + print_num("Version", hdr->version); + print_num("Real mode switch", hdr->realmode_swtch); + print_num("Start sys", hdr->start_sys); + print_num("Kernel version", hdr->kernel_version); + version = get_kernel_version(base_ptr, (void *)state.bzimage_addr); + if (version) + printf(" @%p: %s\n", version, version); + print_num("Type of loader", hdr->type_of_loader); + show_loader(hdr); + print_num("Load flags", hdr->loadflags); + print_flags(load_flags, ARRAY_SIZE(load_flags), hdr->loadflags); + print_num("Setup move size", hdr->setup_move_size); + print_num("Code32 start", hdr->code32_start); + print_num("Ramdisk image", hdr->ramdisk_image); + print_num("Ramdisk size", hdr->ramdisk_size); + print_num("Bootsect kludge", hdr->bootsect_kludge); + print_num("Heap end ptr", hdr->heap_end_ptr); + print_num("Ext loader ver", hdr->ext_loader_ver); + print_num("Ext loader type", hdr->ext_loader_type); + print_num("Command line ptr", hdr->cmd_line_ptr); + if (hdr->cmd_line_ptr) { + printf(" "); + /* Use puts() to avoid limits from CONFIG_SYS_PBSIZE */ + puts((char *)hdr->cmd_line_ptr); + printf("\n"); + } + print_num("Initrd addr max", hdr->initrd_addr_max); + print_num("Kernel alignment", hdr->kernel_alignment); + print_num("Relocatable kernel", hdr->relocatable_kernel); + print_num("Min alignment", hdr->min_alignment); + if (hdr->min_alignment) + printf("%-20s: %x\n", "", 1 << hdr->min_alignment); + print_num("Xload flags", hdr->xloadflags); + print_flags(xload_flags, ARRAY_SIZE(xload_flags), hdr->xloadflags); + print_num("Cmdline size", hdr->cmdline_size); + print_num("Hardware subarch", hdr->hardware_subarch); + print_num64("HW subarch data", hdr->hardware_subarch_data); + print_num("Payload offset", hdr->payload_offset); + print_num("Payload length", hdr->payload_length); + print_num64("Setup data", hdr->setup_data); + print_num64("Pref address", hdr->pref_address); + print_num("Init size", hdr->init_size); + print_num("Handover offset", hdr->handover_offset); + if (get_boot_protocol(hdr, false) >= 0x215) + print_num("Kernel info offset", hdr->kernel_info_offset); + + return 0; +} + /* Note: This defines the complete_zboot() function */ U_BOOT_SUBCMDS(zboot, U_BOOT_CMD_MKENT(start, 7, 1, do_zboot_start, "", ""), @@ -465,6 +660,7 @@ U_BOOT_SUBCMDS(zboot, U_BOOT_CMD_MKENT(setup, 1, 1, do_zboot_setup, "", ""), U_BOOT_CMD_MKENT(info, 1, 1, do_zboot_info, "", ""), U_BOOT_CMD_MKENT(go, 1, 1, do_zboot_go, "", ""), + U_BOOT_CMD_MKENT(dump, 2, 1, do_zboot_dump, "", ""), ) int do_zboot_states(struct cmd_tbl *cmdtp, int flag, int argc, @@ -528,6 +724,7 @@ U_BOOT_CMDREP_COMPLETE( "\tload - load OS image\n" "\tsetup - set up table\n" "\tinfo - show summary info\n" - "\tgo - start OS\n", + "\tgo - start OS\n" + "\tdump [addr] - dump info (optional address of boot params)", complete_zboot );