| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (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) |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| #include <dm/device.h> |
| #include <dm/root.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 |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| #define COMMAND_LINE_OFFSET 0x9000 |
| |
| __weak void board_quiesce_devices(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 |
| |
| /* |
| * Call remove function of all devices with a removal flag set. |
| * This may be useful for last-stage operations, like cancelling |
| * of DMA operation or releasing device internal buffers. |
| */ |
| dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); |
| } |
| |
| #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; |
| } |
| /* At present 64-bit U-Boot does not support booting a |
| * kernel. |
| * TODO(sjg@chromium.org): Support booting both 32-bit and |
| * 64-bit kernels from 64-bit U-Boot. |
| */ |
| #if !CONFIG_IS_ENABLED(X86_64) |
| return cpu_jump_to_64bit(setup_base, load_address); |
| #endif |
| } 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. |
| * |
| * Note that we cannot currently boot a kernel while running as |
| * an EFI application. Please use the payload option for that. |
| */ |
| #ifndef CONFIG_EFI_APP |
| __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) |
| ); |
| #endif |
| } |
| |
| /* 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); |
| } |