* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
*
- * 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+
*/
/*
#include <asm/io.h>
#include <asm/ptrace.h>
#include <asm/zimage.h>
-#include <asm/realmode.h>
#include <asm/byteorder.h>
#include <asm/bootparam.h>
+#ifdef CONFIG_SYS_COREBOOT
+#include <asm/arch/timestamp.h>
+#endif
+#include <linux/compiler.h>
/*
* Memory lay-out:
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, void **load_address)
+static int kernel_magic_ok(struct setup_header *hdr)
{
- 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 != hdr->boot_flag) {
printf("Error: Invalid Boot Flag "
"(found 0x%04x, expected 0x%04x)\n",
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,
+ void **load_address)
+{
+ 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) {
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);
else
*load_address = (void *)ZIMAGE_LOAD_ADDR;
-#if defined CONFIG_ZBOOT_32
printf("Building boot_params at 0x%8.8lx\n", (ulong)setup_base);
memset(setup_base, 0, sizeof(*setup_base));
setup_base->hdr = params->hdr;
- setup_base->e820_entries = install_e820_map(
- ARRAY_SIZE(setup_base->e820_map), setup_base->e820_map);
-#else
- /* 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);
-#endif
-
- 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) {
- setup_base->screen_info.cl_magic = COMMAND_LINE_MAGIC;
- setup_base->screen_info.cl_offset = COMMAND_LINE_OFFSET;
-
/*
* A very old kernel MUST have its real-mode code
* loaded at 0x90000
SETUP_MAX_SIZE - setup_size);
}
- /* We are now setting up the real-mode version of the header */
- hdr = &setup_base->hdr;
+ 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;
+ }
+
+ printf("Loading %s at address %p (%ld bytes)\n",
+ big_image ? "bzImage" : "zImage", *load_address, kernel_size);
+
+ memmove(*load_address, 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 *)params +
- 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",
}
if (bootproto >= 0x0202) {
- hdr->cmd_line_ptr =
- (uintptr_t)setup_base + COMMAND_LINE_OFFSET;
+ 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 = COMMAND_LINE_OFFSET;
+ 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;
- }
- } 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((char *)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);
-
- memmove(*load_address, image + setup_size, kernel_size);
+ build_command_line(cmd_line, auto_boot);
+ return 0;
+}
- /* ready for booting */
- return setup_base;
+/*
+ * Implement a weak default function for boards that optionally
+ * need to clean up the system before jumping to the kernel.
+ */
+__weak void board_final_cleanup(void)
+{
}
void boot_zimage(void *setup_base, void *load_address)
{
+ debug("## Transferring control to Linux (at address %08x) ...\n",
+ (u32)setup_base);
+
+ bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
+#ifdef CONFIG_BOOTSTAGE_REPORT
+ bootstage_report();
+#endif
+ board_final_cleanup();
+
printf("\nStarting kernel ...\n\n");
-#if defined CONFIG_ZBOOT_32
+#ifdef CONFIG_SYS_COREBOOT
+ timestamp_add_now(TS_U_BOOT_START_KERNEL);
+#endif
/*
* Set %ebx, %ebp, and %edi to 0, %esi to point to the boot_params
* structure, and then jump to the kernel. We assume that %cs is
* itself in arch/i386/cpu/cpu.c.
*/
__asm__ __volatile__ (
- "movl $0, %%ebp \n"
- "cli \n"
- "jmp %[kernel_entry] \n"
+ "movl $0, %%ebp\n"
+ "cli\n"
+ "jmp *%[kernel_entry]\n"
:: [kernel_entry]"a"(load_address),
[boot_params] "S"(setup_base),
"b"(0), "D"(0)
: "%ebp"
);
-#else
- 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);
-#endif
+}
+
+void setup_pcat_compatibility(void)
+ __attribute__((weak, alias("__setup_pcat_compatibility")));
+
+void __setup_pcat_compatibility(void)
+{
}
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;
void *load_address;
char *s;
ulong bzImage_size = 0;
+ ulong initrd_addr = 0;
+ ulong initrd_size = 0;
disable_interrupts();
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);
+ }
+
+ if (argc >= 4)
+ initrd_addr = simple_strtoul(argv[3], NULL, 16);
+ if (argc >= 5)
+ initrd_size = simple_strtoul(argv[4], NULL, 16);
/* Lets look for */
- base_ptr = load_zimage(bzImage_addr, bzImage_size, 0, 0, 0,
- &load_address);
+ base_ptr = load_zimage(bzImage_addr, bzImage_size, &load_address);
if (!base_ptr) {
printf("## Kernel loading failed ...\n");
- } else {
- printf("## Transferring control to Linux "
- "(at address %08x) ...\n",
- (u32)base_ptr);
-
- /* we assume that the kernel is in place */
- boot_zimage(base_ptr, load_address);
- /* does not return */
+ return -1;
}
+ if (setup_zimage(base_ptr, (char *)base_ptr + COMMAND_LINE_OFFSET,
+ 0, initrd_addr, initrd_size)) {
+ printf("Setting up boot parameters failed ...\n");
+ return -1;
+ }
+
+ /* we assume that the kernel is in place */
+ boot_zimage(base_ptr, load_address);
+ /* does not return */
return -1;
}
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"
);
projects / u-boot / blobdiff