X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Fx86%2Flib%2Fzimage.c;h=00172dc7c130180fbd5062a791975f9419c23adb;hb=59206dd1e324781574a9bda9fa6c238cd0939cd3;hp=8b42b5cafa1ba39d4b67b205c94b8ce7a6a97c09;hpb=7708d8b352e9e595f6f08afd3206af6495c7dc09;p=u-boot diff --git a/arch/x86/lib/zimage.c b/arch/x86/lib/zimage.c index 8b42b5cafa..00172dc7c1 100644 --- a/arch/x86/lib/zimage.c +++ b/arch/x86/lib/zimage.c @@ -1,24 +1,9 @@ /* + * Copyright (c) 2011 The Chromium OS Authors. * (C) Copyright 2002 * Daniel Engström, Omicron Ceti AB, * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ /* @@ -32,9 +17,15 @@ #include #include #include -#include #include +#include #include +#ifdef CONFIG_SYS_COREBOOT +#include +#endif +#include + +DECLARE_GLOBAL_DATA_PTR; /* * Memory lay-out: @@ -57,15 +48,15 @@ static void build_command_line(char *command_line, int auto_boot) command_line[0] = '\0'; - env_command_line = getenv("bootargs"); + env_command_line = env_get("bootargs"); /* set console= argument if we use a serial console */ if (!strstr(env_command_line, "console=")) { - if (!strcmp(getenv("stdout"), "serial")) { + if (!strcmp(env_get("stdout"), "serial")) { /* We seem to use serial console */ sprintf(command_line, "console=ttyS0,%s ", - getenv("baudrate")); + env_get("baudrate")); } } @@ -78,40 +69,47 @@ static void build_command_line(char *command_line, int auto_boot) printf("Kernel command line: \"%s\"\n", command_line); } -void *load_zimage(char *image, unsigned long kernel_size, - unsigned long initrd_addr, unsigned long initrd_size, - int auto_boot) +static int kernel_magic_ok(struct setup_header *hdr) { - void *setup_base; - int setup_size; - int bootproto; - int big_image; - void *load_address; - struct setup_header *hdr; - - hdr = (struct setup_header *)(image + SETUP_SECTS_OFF); - - /* base address for real-mode segment */ - setup_base = (void *)DEFAULT_SETUP_BASE; - if (KERNEL_MAGIC != hdr->boot_flag) { - printf("Error: Invalid Boot Flag (found 0x%04x, expected 0x%04x)\n", - hdr->boot_flag, KERNEL_MAGIC); + printf("Error: Invalid Boot Flag " + "(found 0x%04x, expected 0x%04x)\n", + hdr->boot_flag, KERNEL_MAGIC); return 0; } else { printf("Valid Boot Flag\n"); + return 1; } +} - /* determine boot protocol version */ - if (KERNEL_V2_MAGIC == hdr->header) { +static int get_boot_protocol(struct setup_header *hdr) +{ + if (hdr->header == KERNEL_V2_MAGIC) { printf("Magic signature found\n"); - - bootproto = hdr->version; + return hdr->version; } else { /* Very old kernel */ printf("Magic signature not found\n"); - bootproto = 0x0100; + return 0x0100; } +} + +struct boot_params *load_zimage(char *image, unsigned long kernel_size, + ulong *load_addressp) +{ + struct boot_params *setup_base; + int setup_size; + int bootproto; + int big_image; + + struct boot_params *params = (struct boot_params *)image; + struct setup_header *hdr = ¶ms->hdr; + + /* base address for real-mode segment */ + setup_base = (struct boot_params *)DEFAULT_SETUP_BASE; + + if (!kernel_magic_ok(hdr)) + return 0; /* determine size of setup */ if (0 == hdr->setup_sects) { @@ -126,64 +124,105 @@ void *load_zimage(char *image, unsigned long kernel_size, if (setup_size > SETUP_MAX_SIZE) printf("Error: Setup is too large (%d bytes)\n", setup_size); + /* determine boot protocol version */ + bootproto = get_boot_protocol(hdr); + + printf("Using boot protocol version %x.%02x\n", + (bootproto & 0xff00) >> 8, bootproto & 0xff); + + if (bootproto >= 0x0200) { + if (hdr->setup_sects >= 15) { + printf("Linux kernel version %s\n", + (char *)params + + hdr->kernel_version + 0x200); + } else { + printf("Setup Sectors < 15 - " + "Cannot print kernel version.\n"); + } + } + /* Determine image type */ big_image = (bootproto >= 0x0200) && (hdr->loadflags & BIG_KERNEL_FLAG); /* Determine load address */ - load_address = (void *)(big_image ? - BZIMAGE_LOAD_ADDR : - ZIMAGE_LOAD_ADDR); + if (big_image) + *load_addressp = BZIMAGE_LOAD_ADDR; + else + *load_addressp = ZIMAGE_LOAD_ADDR; - /* load setup */ - printf("Moving Real-Mode Code to 0x%8.8lx (%d bytes)\n", - (ulong)setup_base, setup_size); - memmove(setup_base, image, setup_size); + printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base); + memset(setup_base, 0, sizeof(*setup_base)); + setup_base->hdr = params->hdr; - printf("Using boot protocol version %x.%02x\n", - (bootproto & 0xff00) >> 8, bootproto & 0xff); + if (bootproto >= 0x0204) + kernel_size = hdr->syssize * 16; + else + kernel_size -= setup_size; if (bootproto == 0x0100) { - *(u16 *)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC; - *(u16 *)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET; - /* * A very old kernel MUST have its real-mode code * loaded at 0x90000 */ - if ((u32)setup_base != 0x90000) { + if ((ulong)setup_base != 0x90000) { /* Copy the real-mode kernel */ memmove((void *)0x90000, setup_base, setup_size); /* Copy the command line */ memmove((void *)0x99000, - setup_base + COMMAND_LINE_OFFSET, + (u8 *)setup_base + COMMAND_LINE_OFFSET, COMMAND_LINE_SIZE); /* Relocated */ - setup_base = (void *)0x90000; + setup_base = (struct boot_params *)0x90000; } /* It is recommended to clear memory up to the 32K mark */ - memset((void *)0x90000 + setup_size, 0, - SETUP_MAX_SIZE-setup_size); + memset((u8 *)0x90000 + setup_size, 0, + SETUP_MAX_SIZE - setup_size); + } + + if (big_image) { + if (kernel_size > BZIMAGE_MAX_SIZE) { + printf("Error: bzImage kernel too big! " + "(size: %ld, max: %d)\n", + kernel_size, BZIMAGE_MAX_SIZE); + return 0; + } + } else if ((kernel_size) > ZIMAGE_MAX_SIZE) { + printf("Error: zImage kernel too big! (size: %ld, max: %d)\n", + kernel_size, ZIMAGE_MAX_SIZE); + return 0; } - /* We are now setting up the real-mode version of the header */ - hdr = (struct setup_header *)(setup_base + SETUP_SECTS_OFF); + printf("Loading %s at address %lx (%ld bytes)\n", + big_image ? "bzImage" : "zImage", *load_addressp, kernel_size); + + memmove((void *)*load_addressp, image + setup_size, kernel_size); + + return setup_base; +} + +int setup_zimage(struct boot_params *setup_base, char *cmd_line, int auto_boot, + unsigned long initrd_addr, unsigned long initrd_size) +{ + struct setup_header *hdr = &setup_base->hdr; + int bootproto = get_boot_protocol(hdr); + + setup_base->e820_entries = install_e820_map( + ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map); + if (bootproto == 0x0100) { + setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC; + setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET; + } if (bootproto >= 0x0200) { hdr->type_of_loader = 8; - if (hdr->setup_sects >= 15) - printf("Linux kernel version %s\n", - (char *)(setup_base + - (hdr->kernel_version + 0x200))); - else - printf("Setup Sectors < 15 - Cannot print kernel version.\n"); - if (initrd_addr) { - printf("Initial RAM disk at linear address 0x%08lx, size %ld bytes\n", + printf("Initial RAM disk at linear address " + "0x%08lx, size %ld bytes\n", initrd_addr, initrd_size); hdr->ramdisk_image = initrd_addr; @@ -196,108 +235,98 @@ void *load_zimage(char *image, unsigned long kernel_size, hdr->loadflags |= HEAP_FLAG; } - if (bootproto >= 0x0202) { - hdr->cmd_line_ptr = (u32)setup_base + COMMAND_LINE_OFFSET; - } else if (bootproto >= 0x0200) { - - *(u16 *)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC; - *(u16 *)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET; + if (cmd_line) { + if (bootproto >= 0x0202) { + hdr->cmd_line_ptr = (uintptr_t)cmd_line; + } else if (bootproto >= 0x0200) { + setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC; + setup_base->screen_info.cl_offset = + (uintptr_t)cmd_line - (uintptr_t)setup_base; - hdr->setup_move_size = 0x9100; - } - - if (bootproto >= 0x0204) - kernel_size = hdr->syssize * 16; - else - kernel_size -= setup_size; - - - if (big_image) { - if ((kernel_size) > BZIMAGE_MAX_SIZE) { - printf("Error: bzImage kernel too big! (size: %ld, max: %d)\n", - kernel_size, BZIMAGE_MAX_SIZE); - return 0; + hdr->setup_move_size = 0x9100; } - } else if ((kernel_size) > ZIMAGE_MAX_SIZE) { - printf("Error: zImage kernel too big! (size: %ld, max: %d)\n", - kernel_size, ZIMAGE_MAX_SIZE); - return 0; - } - - /* build command line at COMMAND_LINE_OFFSET */ - build_command_line(setup_base + COMMAND_LINE_OFFSET, auto_boot); - - printf("Loading %czImage at address 0x%08x (%ld bytes)\n", - big_image ? 'b' : ' ', (u32)load_address, kernel_size); +#if defined(CONFIG_INTEL_MID) + hdr->hardware_subarch = X86_SUBARCH_INTEL_MID; +#endif + /* build command line at COMMAND_LINE_OFFSET */ + build_command_line(cmd_line, auto_boot); + } - memmove(load_address, image + setup_size, kernel_size); + setup_video(&setup_base->screen_info); - /* ready for booting */ - return setup_base; + return 0; } -void boot_zimage(void *setup_base) +void setup_pcat_compatibility(void) + __attribute__((weak, alias("__setup_pcat_compatibility"))); + +void __setup_pcat_compatibility(void) { - struct pt_regs regs; - - memset(®s, 0, sizeof(struct pt_regs)); - regs.xds = (u32)setup_base >> 4; - regs.xes = regs.xds; - regs.xss = regs.xds; - regs.esp = 0x9000; - regs.eflags = 0; - enter_realmode(((u32)setup_base+SETUP_START_OFFSET)>>4, 0, ®s, - ®s); } int do_zboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) { - void *base_ptr; + struct boot_params *base_ptr; void *bzImage_addr = NULL; + ulong load_address; char *s; ulong bzImage_size = 0; + ulong initrd_addr = 0; + ulong initrd_size = 0; disable_interrupts(); /* Setup board for maximum PC/AT Compatibility */ setup_pcat_compatibility(); - if (argc >= 2) + if (argc >= 2) { /* argv[1] holds the address of the bzImage */ s = argv[1]; - else - s = getenv("fileaddr"); + } else { + s = env_get("fileaddr"); + } if (s) bzImage_addr = (void *)simple_strtoul(s, NULL, 16); - if (argc >= 3) + if (argc >= 3) { /* argv[2] holds the size of the bzImage */ bzImage_size = simple_strtoul(argv[2], NULL, 16); + } - /* Lets look for*/ - base_ptr = load_zimage(bzImage_addr, bzImage_size, 0, 0, 0); - - if (!base_ptr) { - printf("## Kernel loading failed ...\n"); - } else { - printf("## Transferring control to Linux (at address %08x) ...\n", - (u32)base_ptr); + if (argc >= 4) + initrd_addr = simple_strtoul(argv[3], NULL, 16); + if (argc >= 5) + initrd_size = simple_strtoul(argv[4], NULL, 16); - /* we assume that the kernel is in place */ - printf("\nStarting kernel ...\n\n"); + /* Lets look for */ + base_ptr = load_zimage(bzImage_addr, bzImage_size, &load_address); - boot_zimage(base_ptr); - /* does not return */ + if (!base_ptr) { + puts("## Kernel loading failed ...\n"); + return -1; + } + if (setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET, + 0, initrd_addr, initrd_size)) { + puts("Setting up boot parameters failed ...\n"); + return -1; } - return -1; + /* we assume that the kernel is in place */ + return boot_linux_kernel((ulong)base_ptr, load_address, false); } U_BOOT_CMD( - zboot, 2, 0, do_zboot, + zboot, 5, 0, do_zboot, "Boot bzImage", - "" + "[addr] [size] [initrd addr] [initrd size]\n" + " addr - The optional starting address of the bzimage.\n" + " If not set it defaults to the environment\n" + " variable \"fileaddr\".\n" + " size - The optional size of the bzimage. Defaults to\n" + " zero.\n" + " initrd addr - The address of the initrd image to use, if any.\n" + " initrd size - The size of the initrd image to use, if any.\n" );