// 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 <bootstage.h> #include <command.h> #include <efi.h> #include <hang.h> #include <log.h> #include <asm/global_data.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 void bootm_announce_and_cleanup(void) { printf("\nStarting kernel ...\n\n"); #ifdef CONFIG_SYS_COREBOOT timestamp_add_now(TS_START_KERNEL); #endif bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); #if IS_ENABLED(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) { struct bd_info *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(struct bootm_headers *images) { char *cmd_line_dest = NULL; struct legacy_img_hdr *hdr; int is_zimage = 0; void *data = NULL; size_t len; int ret; if (CONFIG_IS_ENABLED(OF_LIBFDT) && IS_ENABLED(CONFIG_LMB) && images->ft_len) { debug("using: FDT\n"); if (image_setup_linux(images)) { puts("FDT creation failed! hanging..."); hang(); } } 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); if (!base_ptr) { puts("## Kernel loading failed ...\n"); goto error; } 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, 0); if (ret) { printf("## Setting up boot parameters failed ...\n"); return 1; } return 0; error: return 1; } int boot_linux_kernel(ulong setup_base, ulong entry, bool image_64bit) { bootm_announce_and_cleanup(); #ifdef CONFIG_SYS_COREBOOT timestamp_add_now(TS_U_BOOT_START_KERNEL); #endif /* * Exit EFI boot services just before jumping, after all console * output, since the console won't be available afterwards. */ if (IS_ENABLED(CONFIG_EFI_APP)) { int ret; ret = efi_store_memory_map(efi_get_priv()); if (ret) return ret; printf("Exiting EFI boot services\n"); ret = efi_call_exit_boot_services(); if (ret) return ret; } 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 only supports booting a 64-bit * kernel. * * TODO(sjg@chromium.org): Support booting 32-bit kernels from * 64-bit U-Boot */ if (CONFIG_IS_ENABLED(X86_64)) { typedef void (*h_func)(ulong zero, ulong setup); h_func func; /* jump to Linux with rdi=0, rsi=setup_base */ func = (h_func)entry; func(0, setup_base); } else { return cpu_jump_to_64bit(setup_base, entry); } } 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: this is incomplete for EFI kernels! * * This can boot a kernel while running as an EFI application, * but if the kernel requires EFI support then that support needs * to be enabled first (see EFI_LOADER). Also the EFI information * must enabled with setup_efi_info(). See setup_zimage() for * how this is done with the stub. */ __asm__ __volatile__ ( "movl $0, %%ebp\n" "cli\n" "jmp *%[kernel_entry]\n" :: [kernel_entry]"a"(entry), [boot_params] "S"(setup_base), "b"(0), "D"(0) ); } /* We can't get to here */ return -EFAULT; } /* Subcommand: GO */ static int boot_jump_linux(struct bootm_headers *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[], struct bootm_headers *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); } static ulong get_sp(void) { ulong ret; #if CONFIG_IS_ENABLED(X86_64) ret = gd->start_addr_sp; #else asm("mov %%esp, %0" : "=r"(ret) : ); #endif return ret; } void arch_lmb_reserve(struct lmb *lmb) { arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096); }