1 // SPDX-License-Identifier: GPL-2.0+
4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
5 * Marius Groeger <mgroeger@sysgo.de>
7 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
11 #include <bootstage.h>
14 #include <dm/device.h>
17 #include <fdt_support.h>
19 #include <u-boot/zlib.h>
20 #include <asm/bootparam.h>
22 #include <asm/byteorder.h>
23 #include <asm/zimage.h>
24 #ifdef CONFIG_SYS_COREBOOT
25 #include <asm/arch/timestamp.h>
28 DECLARE_GLOBAL_DATA_PTR;
30 #define COMMAND_LINE_OFFSET 0x9000
32 void bootm_announce_and_cleanup(void)
34 printf("\nStarting kernel ...\n\n");
36 #ifdef CONFIG_SYS_COREBOOT
37 timestamp_add_now(TS_U_BOOT_START_KERNEL);
39 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
40 #if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
45 * Call remove function of all devices with a removal flag set.
46 * This may be useful for last-stage operations, like cancelling
47 * of DMA operation or releasing device internal buffers.
49 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
52 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
53 int arch_fixup_memory_node(void *blob)
57 u64 start[CONFIG_NR_DRAM_BANKS];
58 u64 size[CONFIG_NR_DRAM_BANKS];
60 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
61 start[bank] = bd->bi_dram[bank].start;
62 size[bank] = bd->bi_dram[bank].size;
65 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
69 /* Subcommand: PREP */
70 static int boot_prep_linux(bootm_headers_t *images)
72 char *cmd_line_dest = NULL;
79 #ifdef CONFIG_OF_LIBFDT
81 debug("using: FDT\n");
82 if (image_setup_linux(images)) {
83 puts("FDT creation failed! hanging...");
88 if (images->legacy_hdr_valid) {
89 hdr = images->legacy_hdr_os;
90 if (image_check_type(hdr, IH_TYPE_MULTI)) {
91 ulong os_data, os_len;
93 /* if multi-part image, we need to get first subimage */
94 image_multi_getimg(hdr, 0, &os_data, &os_len);
95 data = (void *)os_data;
98 /* otherwise get image data */
99 data = (void *)image_get_data(hdr);
100 len = image_get_data_size(hdr);
103 #if defined(CONFIG_FIT)
104 } else if (images->fit_uname_os && is_zimage) {
105 ret = fit_image_get_data(images->fit_hdr_os,
106 images->fit_noffset_os,
107 (const void **)&data, &len);
109 puts("Can't get image data/size!\n");
120 base_ptr = (char *)load_zimage(data, len, &load_address);
122 puts("## Kernel loading failed ...\n");
125 images->os.load = load_address;
126 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
127 images->ep = (ulong)base_ptr;
128 } else if (images->ep) {
129 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
131 printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
135 printf("Setup at %#08lx\n", images->ep);
136 ret = setup_zimage((void *)images->ep, cmd_line_dest,
138 images->rd_end - images->rd_start);
141 printf("## Setting up boot parameters failed ...\n");
151 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
153 bootm_announce_and_cleanup();
155 #ifdef CONFIG_SYS_COREBOOT
156 timestamp_add_now(TS_U_BOOT_START_KERNEL);
159 if (!cpu_has_64bit()) {
160 puts("Cannot boot 64-bit kernel on 32-bit machine\n");
163 /* At present 64-bit U-Boot does not support booting a
165 * TODO(sjg@chromium.org): Support booting both 32-bit and
166 * 64-bit kernels from 64-bit U-Boot.
168 #if !CONFIG_IS_ENABLED(X86_64)
169 return cpu_jump_to_64bit(setup_base, load_address);
173 * Set %ebx, %ebp, and %edi to 0, %esi to point to the
174 * boot_params structure, and then jump to the kernel. We
175 * assume that %cs is 0x10, 4GB flat, and read/execute, and
176 * the data segments are 0x18, 4GB flat, and read/write.
177 * U-Boot is setting them up that way for itself in
178 * arch/i386/cpu/cpu.c.
180 * Note that we cannot currently boot a kernel while running as
181 * an EFI application. Please use the payload option for that.
183 #ifndef CONFIG_EFI_APP
184 __asm__ __volatile__ (
187 "jmp *%[kernel_entry]\n"
188 :: [kernel_entry]"a"(load_address),
189 [boot_params] "S"(setup_base),
195 /* We can't get to here */
200 static int boot_jump_linux(bootm_headers_t *images)
202 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
203 images->ep, images->os.load);
205 return boot_linux_kernel(images->ep, images->os.load,
206 images->os.arch == IH_ARCH_X86_64);
209 int do_bootm_linux(int flag, int argc, char *const argv[],
210 bootm_headers_t *images)
212 /* No need for those on x86 */
213 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
216 if (flag & BOOTM_STATE_OS_PREP)
217 return boot_prep_linux(images);
219 if (flag & BOOTM_STATE_OS_GO)
220 return boot_jump_linux(images);
222 return boot_jump_linux(images);