3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
6 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
8 * SPDX-License-Identifier: GPL-2.0+
14 #include <fdt_support.h>
16 #include <u-boot/zlib.h>
17 #include <asm/bootparam.h>
19 #include <asm/byteorder.h>
20 #include <asm/zimage.h>
21 #ifdef CONFIG_SYS_COREBOOT
22 #include <asm/arch/timestamp.h>
25 #define COMMAND_LINE_OFFSET 0x9000
28 * Implement a weak default function for boards that optionally
29 * need to clean up the system before jumping to the kernel.
31 __weak void board_final_cleanup(void)
35 void bootm_announce_and_cleanup(void)
37 printf("\nStarting kernel ...\n\n");
39 #ifdef CONFIG_SYS_COREBOOT
40 timestamp_add_now(TS_U_BOOT_START_KERNEL);
42 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
43 #ifdef CONFIG_BOOTSTAGE_REPORT
46 board_final_cleanup();
49 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
50 int arch_fixup_memory_node(void *blob)
54 u64 start[CONFIG_NR_DRAM_BANKS];
55 u64 size[CONFIG_NR_DRAM_BANKS];
57 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
58 start[bank] = bd->bi_dram[bank].start;
59 size[bank] = bd->bi_dram[bank].size;
62 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
66 /* Subcommand: PREP */
67 static int boot_prep_linux(bootm_headers_t *images)
69 char *cmd_line_dest = NULL;
76 #ifdef CONFIG_OF_LIBFDT
78 debug("using: FDT\n");
79 if (image_setup_linux(images)) {
80 puts("FDT creation failed! hanging...");
85 if (images->legacy_hdr_valid) {
86 hdr = images->legacy_hdr_os;
87 if (image_check_type(hdr, IH_TYPE_MULTI)) {
88 ulong os_data, os_len;
90 /* if multi-part image, we need to get first subimage */
91 image_multi_getimg(hdr, 0, &os_data, &os_len);
92 data = (void *)os_data;
95 /* otherwise get image data */
96 data = (void *)image_get_data(hdr);
97 len = image_get_data_size(hdr);
100 #if defined(CONFIG_FIT)
101 } else if (images->fit_uname_os && is_zimage) {
102 ret = fit_image_get_data(images->fit_hdr_os,
103 images->fit_noffset_os,
104 (const void **)&data, &len);
106 puts("Can't get image data/size!\n");
117 base_ptr = (char *)load_zimage(data, len, &load_address);
118 images->os.load = load_address;
119 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
120 images->ep = (ulong)base_ptr;
121 } else if (images->ep) {
122 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
124 printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
128 printf("Setup at %#08lx\n", images->ep);
129 ret = setup_zimage((void *)images->ep, cmd_line_dest,
131 images->rd_end - images->rd_start);
134 printf("## Setting up boot parameters failed ...\n");
144 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
146 bootm_announce_and_cleanup();
148 #ifdef CONFIG_SYS_COREBOOT
149 timestamp_add_now(TS_U_BOOT_START_KERNEL);
152 if (!cpu_has_64bit()) {
153 puts("Cannot boot 64-bit kernel on 32-bit machine\n");
156 return cpu_jump_to_64bit(setup_base, load_address);
159 * Set %ebx, %ebp, and %edi to 0, %esi to point to the
160 * boot_params structure, and then jump to the kernel. We
161 * assume that %cs is 0x10, 4GB flat, and read/execute, and
162 * the data segments are 0x18, 4GB flat, and read/write.
163 * U-boot is setting them up that way for itself in
164 * arch/i386/cpu/cpu.c.
166 __asm__ __volatile__ (
169 "jmp *%[kernel_entry]\n"
170 :: [kernel_entry]"a"(load_address),
171 [boot_params] "S"(setup_base),
176 /* We can't get to here */
181 static int boot_jump_linux(bootm_headers_t *images)
183 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
184 images->ep, images->os.load);
186 return boot_linux_kernel(images->ep, images->os.load,
187 images->os.arch == IH_ARCH_X86_64);
190 int do_bootm_linux(int flag, int argc, char * const argv[],
191 bootm_headers_t *images)
193 /* No need for those on x86 */
194 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
197 if (flag & BOOTM_STATE_OS_PREP)
198 return boot_prep_linux(images);
200 if (flag & BOOTM_STATE_OS_GO)
201 return boot_jump_linux(images);
203 return boot_jump_linux(images);