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>
16 #include <asm/global_data.h>
17 #include <dm/device.h>
20 #include <fdt_support.h>
22 #include <u-boot/zlib.h>
23 #include <asm/bootparam.h>
25 #include <asm/byteorder.h>
26 #include <asm/zimage.h>
27 #ifdef CONFIG_SYS_COREBOOT
28 #include <asm/arch/timestamp.h>
31 DECLARE_GLOBAL_DATA_PTR;
33 #define COMMAND_LINE_OFFSET 0x9000
35 void bootm_announce_and_cleanup(void)
37 printf("\nStarting kernel ...\n\n");
39 #ifdef CONFIG_SYS_COREBOOT
40 timestamp_add_now(TS_START_KERNEL);
42 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
43 #if IS_ENABLED(CONFIG_BOOTSTAGE_REPORT)
48 * Call remove function of all devices with a removal flag set.
49 * This may be useful for last-stage operations, like cancelling
50 * of DMA operation or releasing device internal buffers.
52 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
55 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
56 int arch_fixup_memory_node(void *blob)
58 struct bd_info *bd = gd->bd;
60 u64 start[CONFIG_NR_DRAM_BANKS];
61 u64 size[CONFIG_NR_DRAM_BANKS];
63 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
64 start[bank] = bd->bi_dram[bank].start;
65 size[bank] = bd->bi_dram[bank].size;
68 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
72 /* Subcommand: PREP */
73 static int boot_prep_linux(struct bootm_headers *images)
75 char *cmd_line_dest = NULL;
76 struct legacy_img_hdr *hdr;
82 if (CONFIG_IS_ENABLED(OF_LIBFDT) && IS_ENABLED(CONFIG_LMB) && images->ft_len) {
83 debug("using: FDT\n");
84 if (image_setup_linux(images)) {
85 puts("FDT creation failed! hanging...");
90 if (images->legacy_hdr_valid) {
91 hdr = images->legacy_hdr_os;
92 if (image_check_type(hdr, IH_TYPE_MULTI)) {
93 ulong os_data, os_len;
95 /* if multi-part image, we need to get first subimage */
96 image_multi_getimg(hdr, 0, &os_data, &os_len);
97 data = (void *)os_data;
100 /* otherwise get image data */
101 data = (void *)image_get_data(hdr);
102 len = image_get_data_size(hdr);
105 #if defined(CONFIG_FIT)
106 } else if (images->fit_uname_os && is_zimage) {
107 ret = fit_image_get_data(images->fit_hdr_os,
108 images->fit_noffset_os,
109 (const void **)&data, &len);
111 puts("Can't get image data/size!\n");
122 base_ptr = (char *)load_zimage(data, len, &load_address);
124 puts("## Kernel loading failed ...\n");
127 images->os.load = load_address;
128 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
129 images->ep = (ulong)base_ptr;
130 } else if (images->ep) {
131 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
133 printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
137 printf("Setup at %#08lx\n", images->ep);
138 ret = setup_zimage((void *)images->ep, cmd_line_dest,
140 images->rd_end - images->rd_start, 0);
143 printf("## Setting up boot parameters failed ...\n");
153 int boot_linux_kernel(ulong setup_base, ulong entry, bool image_64bit)
155 bootm_announce_and_cleanup();
157 #ifdef CONFIG_SYS_COREBOOT
158 timestamp_add_now(TS_U_BOOT_START_KERNEL);
162 * Exit EFI boot services just before jumping, after all console
163 * output, since the console won't be available afterwards.
165 if (IS_ENABLED(CONFIG_EFI_APP)) {
168 ret = efi_store_memory_map(efi_get_priv());
171 printf("Exiting EFI boot services\n");
172 ret = efi_call_exit_boot_services();
178 if (!cpu_has_64bit()) {
179 puts("Cannot boot 64-bit kernel on 32-bit machine\n");
183 * At present 64-bit U-Boot only supports booting a 64-bit
186 * TODO(sjg@chromium.org): Support booting 32-bit kernels from
189 if (CONFIG_IS_ENABLED(X86_64)) {
190 typedef void (*h_func)(ulong zero, ulong setup);
193 /* jump to Linux with rdi=0, rsi=setup_base */
194 func = (h_func)entry;
197 return cpu_jump_to_64bit(setup_base, entry);
201 * Set %ebx, %ebp, and %edi to 0, %esi to point to the
202 * boot_params structure, and then jump to the kernel. We
203 * assume that %cs is 0x10, 4GB flat, and read/execute, and
204 * the data segments are 0x18, 4GB flat, and read/write.
205 * U-Boot is setting them up that way for itself in
206 * arch/i386/cpu/cpu.c.
208 * Note: this is incomplete for EFI kernels!
210 * This can boot a kernel while running as an EFI application,
211 * but if the kernel requires EFI support then that support needs
212 * to be enabled first (see EFI_LOADER). Also the EFI information
213 * must enabled with setup_efi_info(). See setup_zimage() for
214 * how this is done with the stub.
216 __asm__ __volatile__ (
219 "jmp *%[kernel_entry]\n"
220 :: [kernel_entry]"a"(entry),
221 [boot_params] "S"(setup_base),
226 /* We can't get to here */
231 static int boot_jump_linux(struct bootm_headers *images)
233 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
234 images->ep, images->os.load);
236 return boot_linux_kernel(images->ep, images->os.load,
237 images->os.arch == IH_ARCH_X86_64);
240 int do_bootm_linux(int flag, int argc, char *const argv[],
241 struct bootm_headers *images)
243 /* No need for those on x86 */
244 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
247 if (flag & BOOTM_STATE_OS_PREP)
248 return boot_prep_linux(images);
250 if (flag & BOOTM_STATE_OS_GO)
251 return boot_jump_linux(images);
253 return boot_jump_linux(images);
256 static ulong get_sp(void)
260 #if CONFIG_IS_ENABLED(X86_64)
261 ret = gd->start_addr_sp;
263 asm("mov %%esp, %0" : "=r"(ret) : );
269 void arch_lmb_reserve(struct lmb *lmb)
271 arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);