GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*/
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#include <common.h>
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#include <command.h>
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#include <dm/device.h>
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#include <dm/root.h>
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#include <errno.h>
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#include <fdt_support.h>
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#include <image.h>
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#include <u-boot/zlib.h>
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#include <asm/bootparam.h>
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#include <asm/cpu.h>
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#include <asm/byteorder.h>
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#include <asm/zimage.h>
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#ifdef CONFIG_SYS_COREBOOT
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#include <asm/arch/timestamp.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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#define COMMAND_LINE_OFFSET 0x9000
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void bootm_announce_and_cleanup(void)
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{
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printf("\nStarting kernel ...\n\n");
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#ifdef CONFIG_SYS_COREBOOT
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timestamp_add_now(TS_U_BOOT_START_KERNEL);
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#endif
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bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
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#if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
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bootstage_report();
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#endif
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/*
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* Call remove function of all devices with a removal flag set.
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* This may be useful for last-stage operations, like cancelling
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* of DMA operation or releasing device internal buffers.
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*/
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dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
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}
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#if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
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int arch_fixup_memory_node(void *blob)
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{
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bd_t *bd = gd->bd;
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int bank;
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u64 start[CONFIG_NR_DRAM_BANKS];
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u64 size[CONFIG_NR_DRAM_BANKS];
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for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
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start[bank] = bd->bi_dram[bank].start;
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size[bank] = bd->bi_dram[bank].size;
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}
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return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
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}
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#endif
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/* Subcommand: PREP */
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static int boot_prep_linux(bootm_headers_t *images)
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{
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char *cmd_line_dest = NULL;
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image_header_t *hdr;
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int is_zimage = 0;
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void *data = NULL;
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size_t len;
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int ret;
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#ifdef CONFIG_OF_LIBFDT
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if (images->ft_len) {
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debug("using: FDT\n");
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if (image_setup_linux(images)) {
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puts("FDT creation failed! hanging...");
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hang();
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}
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}
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#endif
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if (images->legacy_hdr_valid) {
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hdr = images->legacy_hdr_os;
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if (image_check_type(hdr, IH_TYPE_MULTI)) {
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ulong os_data, os_len;
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/* if multi-part image, we need to get first subimage */
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image_multi_getimg(hdr, 0, &os_data, &os_len);
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data = (void *)os_data;
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len = os_len;
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} else {
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/* otherwise get image data */
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data = (void *)image_get_data(hdr);
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len = image_get_data_size(hdr);
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}
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is_zimage = 1;
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#if defined(CONFIG_FIT)
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} else if (images->fit_uname_os && is_zimage) {
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ret = fit_image_get_data(images->fit_hdr_os,
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images->fit_noffset_os,
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(const void **)&data, &len);
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if (ret) {
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puts("Can't get image data/size!\n");
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goto error;
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}
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is_zimage = 1;
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#endif
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}
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if (is_zimage) {
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ulong load_address;
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char *base_ptr;
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base_ptr = (char *)load_zimage(data, len, &load_address);
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if (!base_ptr) {
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puts("## Kernel loading failed ...\n");
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goto error;
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}
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images->os.load = load_address;
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cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
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images->ep = (ulong)base_ptr;
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} else if (images->ep) {
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cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
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} else {
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printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
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goto error;
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}
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printf("Setup at %#08lx\n", images->ep);
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ret = setup_zimage((void *)images->ep, cmd_line_dest,
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0, images->rd_start,
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images->rd_end - images->rd_start);
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if (ret) {
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printf("## Setting up boot parameters failed ...\n");
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return 1;
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}
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return 0;
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error:
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return 1;
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}
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int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
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{
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bootm_announce_and_cleanup();
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#ifdef CONFIG_SYS_COREBOOT
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timestamp_add_now(TS_U_BOOT_START_KERNEL);
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#endif
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if (image_64bit) {
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if (!cpu_has_64bit()) {
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puts("Cannot boot 64-bit kernel on 32-bit machine\n");
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return -EFAULT;
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}
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/* At present 64-bit U-Boot does not support booting a
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* kernel.
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* TODO(sjg@chromium.org): Support booting both 32-bit and
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* 64-bit kernels from 64-bit U-Boot.
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*/
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#if !CONFIG_IS_ENABLED(X86_64)
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return cpu_jump_to_64bit(setup_base, load_address);
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#endif
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} else {
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/*
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* Set %ebx, %ebp, and %edi to 0, %esi to point to the
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* boot_params structure, and then jump to the kernel. We
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* assume that %cs is 0x10, 4GB flat, and read/execute, and
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* the data segments are 0x18, 4GB flat, and read/write.
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* U-Boot is setting them up that way for itself in
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* arch/i386/cpu/cpu.c.
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*
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* Note that we cannot currently boot a kernel while running as
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* an EFI application. Please use the payload option for that.
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*/
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#ifndef CONFIG_EFI_APP
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__asm__ __volatile__ (
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"movl $0, %%ebp\n"
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"cli\n"
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"jmp *%[kernel_entry]\n"
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:: [kernel_entry]"a"(load_address),
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[boot_params] "S"(setup_base),
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"b"(0), "D"(0)
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);
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#endif
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}
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/* We can't get to here */
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return -EFAULT;
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}
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/* Subcommand: GO */
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static int boot_jump_linux(bootm_headers_t *images)
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{
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debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
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images->ep, images->os.load);
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return boot_linux_kernel(images->ep, images->os.load,
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images->os.arch == IH_ARCH_X86_64);
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}
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int do_bootm_linux(int flag, int argc, char * const argv[],
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bootm_headers_t *images)
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{
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/* No need for those on x86 */
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if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
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return -1;
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if (flag & BOOTM_STATE_OS_PREP)
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return boot_prep_linux(images);
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if (flag & BOOTM_STATE_OS_GO)
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return boot_jump_linux(images);
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return boot_jump_linux(images);
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}
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