1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2002
4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
5 * Marius Groeger <mgroeger@sysgo.de>
6 *
7 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
8 */
9
10 #include <common.h>
11 #include <command.h>
12 #include <dm/device.h>
13 #include <dm/root.h>
14 #include <errno.h>
15 #include <fdt_support.h>
16 #include <image.h>
17 #include <u-boot/zlib.h>
18 #include <asm/bootparam.h>
19 #include <asm/cpu.h>
20 #include <asm/byteorder.h>
21 #include <asm/zimage.h>
22 #ifdef CONFIG_SYS_COREBOOT
23 #include <asm/arch/timestamp.h>
24 #endif
25
26 DECLARE_GLOBAL_DATA_PTR;
27
28 #define COMMAND_LINE_OFFSET 0x9000
29
bootm_announce_and_cleanup(void)30 void bootm_announce_and_cleanup(void)
31 {
32 printf("\nStarting kernel ...\n\n");
33
34 #ifdef CONFIG_SYS_COREBOOT
35 timestamp_add_now(TS_U_BOOT_START_KERNEL);
36 #endif
37 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
38 #ifdef CONFIG_BOOTSTAGE_REPORT
39 bootstage_report();
40 #endif
41
42 /*
43 * Call remove function of all devices with a removal flag set.
44 * This may be useful for last-stage operations, like cancelling
45 * of DMA operation or releasing device internal buffers.
46 */
47 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
48 }
49
50 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
arch_fixup_memory_node(void * blob)51 int arch_fixup_memory_node(void *blob)
52 {
53 bd_t *bd = gd->bd;
54 int bank;
55 u64 start[CONFIG_NR_DRAM_BANKS];
56 u64 size[CONFIG_NR_DRAM_BANKS];
57
58 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
59 start[bank] = bd->bi_dram[bank].start;
60 size[bank] = bd->bi_dram[bank].size;
61 }
62
63 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
64 }
65 #endif
66
67 /* Subcommand: PREP */
boot_prep_linux(bootm_headers_t * images)68 static int boot_prep_linux(bootm_headers_t *images)
69 {
70 char *cmd_line_dest = NULL;
71 image_header_t *hdr;
72 int is_zimage = 0;
73 void *data = NULL;
74 size_t len;
75 int ret;
76
77 #ifdef CONFIG_OF_LIBFDT
78 if (images->ft_len) {
79 debug("using: FDT\n");
80 if (image_setup_linux(images)) {
81 puts("FDT creation failed! hanging...");
82 hang();
83 }
84 }
85 #endif
86 if (images->legacy_hdr_valid) {
87 hdr = images->legacy_hdr_os;
88 if (image_check_type(hdr, IH_TYPE_MULTI)) {
89 ulong os_data, os_len;
90
91 /* if multi-part image, we need to get first subimage */
92 image_multi_getimg(hdr, 0, &os_data, &os_len);
93 data = (void *)os_data;
94 len = os_len;
95 } else {
96 /* otherwise get image data */
97 data = (void *)image_get_data(hdr);
98 len = image_get_data_size(hdr);
99 }
100 is_zimage = 1;
101 #if defined(CONFIG_FIT)
102 } else if (images->fit_uname_os && is_zimage) {
103 ret = fit_image_get_data(images->fit_hdr_os,
104 images->fit_noffset_os,
105 (const void **)&data, &len);
106 if (ret) {
107 puts("Can't get image data/size!\n");
108 goto error;
109 }
110 is_zimage = 1;
111 #endif
112 }
113
114 if (is_zimage) {
115 ulong load_address;
116 char *base_ptr;
117
118 base_ptr = (char *)load_zimage(data, len, &load_address);
119 images->os.load = load_address;
120 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
121 images->ep = (ulong)base_ptr;
122 } else if (images->ep) {
123 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
124 } else {
125 printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
126 goto error;
127 }
128
129 printf("Setup at %#08lx\n", images->ep);
130 ret = setup_zimage((void *)images->ep, cmd_line_dest,
131 0, images->rd_start,
132 images->rd_end - images->rd_start);
133
134 if (ret) {
135 printf("## Setting up boot parameters failed ...\n");
136 return 1;
137 }
138
139 return 0;
140
141 error:
142 return 1;
143 }
144
boot_linux_kernel(ulong setup_base,ulong load_address,bool image_64bit)145 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
146 {
147 bootm_announce_and_cleanup();
148
149 #ifdef CONFIG_SYS_COREBOOT
150 timestamp_add_now(TS_U_BOOT_START_KERNEL);
151 #endif
152 if (image_64bit) {
153 if (!cpu_has_64bit()) {
154 puts("Cannot boot 64-bit kernel on 32-bit machine\n");
155 return -EFAULT;
156 }
157 /* At present 64-bit U-Boot does not support booting a
158 * kernel.
159 * TODO(sjg@chromium.org): Support booting both 32-bit and
160 * 64-bit kernels from 64-bit U-Boot.
161 */
162 #if !CONFIG_IS_ENABLED(X86_64)
163 return cpu_jump_to_64bit(setup_base, load_address);
164 #endif
165 } else {
166 /*
167 * Set %ebx, %ebp, and %edi to 0, %esi to point to the
168 * boot_params structure, and then jump to the kernel. We
169 * assume that %cs is 0x10, 4GB flat, and read/execute, and
170 * the data segments are 0x18, 4GB flat, and read/write.
171 * U-Boot is setting them up that way for itself in
172 * arch/i386/cpu/cpu.c.
173 *
174 * Note that we cannot currently boot a kernel while running as
175 * an EFI application. Please use the payload option for that.
176 */
177 #ifndef CONFIG_EFI_APP
178 __asm__ __volatile__ (
179 "movl $0, %%ebp\n"
180 "cli\n"
181 "jmp *%[kernel_entry]\n"
182 :: [kernel_entry]"a"(load_address),
183 [boot_params] "S"(setup_base),
184 "b"(0), "D"(0)
185 );
186 #endif
187 }
188
189 /* We can't get to here */
190 return -EFAULT;
191 }
192
193 /* Subcommand: GO */
boot_jump_linux(bootm_headers_t * images)194 static int boot_jump_linux(bootm_headers_t *images)
195 {
196 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
197 images->ep, images->os.load);
198
199 return boot_linux_kernel(images->ep, images->os.load,
200 images->os.arch == IH_ARCH_X86_64);
201 }
202
do_bootm_linux(int flag,int argc,char * const argv[],bootm_headers_t * images)203 int do_bootm_linux(int flag, int argc, char * const argv[],
204 bootm_headers_t *images)
205 {
206 /* No need for those on x86 */
207 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
208 return -1;
209
210 if (flag & BOOTM_STATE_OS_PREP)
211 return boot_prep_linux(images);
212
213 if (flag & BOOTM_STATE_OS_GO)
214 return boot_jump_linux(images);
215
216 return boot_jump_linux(images);
217 }
218