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>
15 #include <asm/global_data.h>
16 #include <dm/device.h>
19 #include <fdt_support.h>
21 #include <u-boot/zlib.h>
22 #include <asm/bootparam.h>
24 #include <asm/byteorder.h>
25 #include <asm/zimage.h>
26 #ifdef CONFIG_SYS_COREBOOT
27 #include <asm/arch/timestamp.h>
30 DECLARE_GLOBAL_DATA_PTR;
32 #define COMMAND_LINE_OFFSET 0x9000
34 void bootm_announce_and_cleanup(void)
36 printf("\nStarting kernel ...\n\n");
38 #ifdef CONFIG_SYS_COREBOOT
39 timestamp_add_now(TS_START_KERNEL);
41 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
42 #if IS_ENABLED(CONFIG_BOOTSTAGE_REPORT)
47 * Call remove function of all devices with a removal flag set.
48 * This may be useful for last-stage operations, like cancelling
49 * of DMA operation or releasing device internal buffers.
51 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
54 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
55 int arch_fixup_memory_node(void *blob)
57 struct bd_info *bd = gd->bd;
59 u64 start[CONFIG_NR_DRAM_BANKS];
60 u64 size[CONFIG_NR_DRAM_BANKS];
62 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
63 start[bank] = bd->bi_dram[bank].start;
64 size[bank] = bd->bi_dram[bank].size;
67 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
71 /* Subcommand: PREP */
72 static int boot_prep_linux(struct bootm_headers *images)
74 char *cmd_line_dest = NULL;
75 struct legacy_img_hdr *hdr;
81 if (CONFIG_IS_ENABLED(OF_LIBFDT) && IS_ENABLED(CONFIG_LMB) && images->ft_len) {
82 debug("using: FDT\n");
83 if (image_setup_linux(images)) {
84 puts("FDT creation failed! hanging...");
89 if (images->legacy_hdr_valid) {
90 hdr = images->legacy_hdr_os;
91 if (image_check_type(hdr, IH_TYPE_MULTI)) {
92 ulong os_data, os_len;
94 /* if multi-part image, we need to get first subimage */
95 image_multi_getimg(hdr, 0, &os_data, &os_len);
96 data = (void *)os_data;
99 /* otherwise get image data */
100 data = (void *)image_get_data(hdr);
101 len = image_get_data_size(hdr);
104 #if defined(CONFIG_FIT)
105 } else if (images->fit_uname_os && is_zimage) {
106 ret = fit_image_get_data(images->fit_hdr_os,
107 images->fit_noffset_os,
108 (const void **)&data, &len);
110 puts("Can't get image data/size!\n");
121 base_ptr = (char *)load_zimage(data, len, &load_address);
123 puts("## Kernel loading failed ...\n");
126 images->os.load = load_address;
127 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
128 images->ep = (ulong)base_ptr;
129 } else if (images->ep) {
130 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
132 printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
136 printf("Setup at %#08lx\n", images->ep);
137 ret = setup_zimage((void *)images->ep, cmd_line_dest,
139 images->rd_end - images->rd_start, 0);
142 printf("## Setting up boot parameters failed ...\n");
152 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
154 bootm_announce_and_cleanup();
156 #ifdef CONFIG_SYS_COREBOOT
157 timestamp_add_now(TS_U_BOOT_START_KERNEL);
160 if (!cpu_has_64bit()) {
161 puts("Cannot boot 64-bit kernel on 32-bit machine\n");
164 /* At present 64-bit U-Boot does not support booting a
166 * TODO(sjg@chromium.org): Support booting both 32-bit and
167 * 64-bit kernels from 64-bit U-Boot.
169 #if !CONFIG_IS_ENABLED(X86_64)
170 return cpu_jump_to_64bit(setup_base, load_address);
174 * Set %ebx, %ebp, and %edi to 0, %esi to point to the
175 * boot_params structure, and then jump to the kernel. We
176 * assume that %cs is 0x10, 4GB flat, and read/execute, and
177 * the data segments are 0x18, 4GB flat, and read/write.
178 * U-Boot is setting them up that way for itself in
179 * arch/i386/cpu/cpu.c.
181 * Note: this is incomplete for EFI kernels!
183 * This can boot a kernel while running as an EFI application,
184 * but if the kernel requires EFI support then that support needs
185 * to be enabled first (see EFI_LOADER). Also the EFI information
186 * must enabled with setup_efi_info(). See setup_zimage() for
187 * how this is done with the stub.
189 __asm__ __volatile__ (
192 "jmp *%[kernel_entry]\n"
193 :: [kernel_entry]"a"(load_address),
194 [boot_params] "S"(setup_base),
199 /* We can't get to here */
204 static int boot_jump_linux(struct bootm_headers *images)
206 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
207 images->ep, images->os.load);
209 return boot_linux_kernel(images->ep, images->os.load,
210 images->os.arch == IH_ARCH_X86_64);
213 int do_bootm_linux(int flag, int argc, char *const argv[],
214 struct bootm_headers *images)
216 /* No need for those on x86 */
217 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
220 if (flag & BOOTM_STATE_OS_PREP)
221 return boot_prep_linux(images);
223 if (flag & BOOTM_STATE_OS_GO)
224 return boot_jump_linux(images);
226 return boot_jump_linux(images);
229 static ulong get_sp(void)
233 #if CONFIG_IS_ENABLED(X86_64)
234 ret = gd->start_addr_sp;
236 asm("mov %%esp, %0" : "=r"(ret) : );
242 void arch_lmb_reserve(struct lmb *lmb)
244 arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 4096);