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/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <errno.h>
#include <fdt_support.h>
#include <image.h>
#include <u-boot/zlib.h>
#include <asm/bootparam.h>
#include <asm/cpu.h>
#include <asm/byteorder.h>
#include <asm/zimage.h>
#ifdef CONFIG_SYS_COREBOOT
#include <asm/arch/timestamp.h>
#endif
#define COMMAND_LINE_OFFSET 0x9000
/*
* 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 bootm_announce_and_cleanup(void)
{
printf("\nStarting kernel ...\n\n");
#ifdef CONFIG_SYS_COREBOOT
timestamp_add_now(TS_U_BOOT_START_KERNEL);
#endif
bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
#ifdef CONFIG_BOOTSTAGE_REPORT
bootstage_report();
#endif
board_final_cleanup();
}
#if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
int arch_fixup_memory_node(void *blob)
{
bd_t *bd = gd->bd;
int bank;
u64 start[CONFIG_NR_DRAM_BANKS];
u64 size[CONFIG_NR_DRAM_BANKS];
for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
start[bank] = bd->bi_dram[bank].start;
size[bank] = bd->bi_dram[bank].size;
}
return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
}
#endif
/* Subcommand: PREP */
static int boot_prep_linux(bootm_headers_t *images)
{
char *cmd_line_dest = NULL;
image_header_t *hdr;
int is_zimage = 0;
void *data = NULL;
size_t len;
int ret;
#ifdef CONFIG_OF_LIBFDT
if (images->ft_len) {
debug("using: FDT\n");
if (image_setup_linux(images)) {
puts("FDT creation failed! hanging...");
hang();
}
}
#endif
if (images->legacy_hdr_valid) {
hdr = images->legacy_hdr_os;
if (image_check_type(hdr, IH_TYPE_MULTI)) {
ulong os_data, os_len;
/* if multi-part image, we need to get first subimage */
image_multi_getimg(hdr, 0, &os_data, &os_len);
data = (void *)os_data;
len = os_len;
} else {
/* otherwise get image data */
data = (void *)image_get_data(hdr);
len = image_get_data_size(hdr);
}
is_zimage = 1;
#if defined(CONFIG_FIT)
} else if (images->fit_uname_os && is_zimage) {
ret = fit_image_get_data(images->fit_hdr_os,
images->fit_noffset_os,
(const void **)&data, &len);
if (ret) {
puts("Can't get image data/size!\n");
goto error;
}
is_zimage = 1;
#endif
}
if (is_zimage) {
ulong load_address;
char *base_ptr;
base_ptr = (char *)load_zimage(data, len, &load_address);
images->os.load = load_address;
cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
images->ep = (ulong)base_ptr;
} else if (images->ep) {
cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
} else {
printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
goto error;
}
printf("Setup at %#08lx\n", images->ep);
ret = setup_zimage((void *)images->ep, cmd_line_dest,
0, images->rd_start,
images->rd_end - images->rd_start);
if (ret) {
printf("## Setting up boot parameters failed ...\n");
return 1;
}
return 0;
error:
return 1;
}
int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
{
bootm_announce_and_cleanup();
#ifdef CONFIG_SYS_COREBOOT
timestamp_add_now(TS_U_BOOT_START_KERNEL);
#endif
if (image_64bit) {
if (!cpu_has_64bit()) {
puts("Cannot boot 64-bit kernel on 32-bit machine\n");
return -EFAULT;
}
return cpu_jump_to_64bit(setup_base, load_address);
} else {
/*
* 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 0x10, 4GB flat, and read/execute, and
* the data segments are 0x18, 4GB flat, and read/write.
* U-boot is setting them up that way for itself in
* arch/i386/cpu/cpu.c.
*/
__asm__ __volatile__ (
"movl $0, %%ebp\n"
"cli\n"
"jmp *%[kernel_entry]\n"
:: [kernel_entry]"a"(load_address),
[boot_params] "S"(setup_base),
"b"(0), "D"(0)
);
}
/* We can't get to here */
return -EFAULT;
}
/* Subcommand: GO */
static int boot_jump_linux(bootm_headers_t *images)
{
debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
images->ep, images->os.load);
return boot_linux_kernel(images->ep, images->os.load,
images->os.arch == IH_ARCH_X86_64);
}
int do_bootm_linux(int flag, int argc, char * const argv[],
bootm_headers_t *images)
{
/* No need for those on x86 */
if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
return -1;
if (flag & BOOTM_STATE_OS_PREP)
return boot_prep_linux(images);
if (flag & BOOTM_STATE_OS_GO)
return boot_jump_linux(images);
return boot_jump_linux(images);
}
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