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 <bootstage.h>
12 #include <command.h>
13 #include <hang.h>
14 #include <log.h>
15 #include <asm/global_data.h>
16 #include <dm/device.h>
17 #include <dm/root.h>
18 #include <errno.h>
19 #include <fdt_support.h>
20 #include <image.h>
21 #include <u-boot/zlib.h>
22 #include <asm/bootparam.h>
23 #include <asm/cpu.h>
24 #include <asm/byteorder.h>
25 #include <asm/zimage.h>
26 #ifdef CONFIG_SYS_COREBOOT
27 #include <asm/arch/timestamp.h>
28 #endif
29
30 DECLARE_GLOBAL_DATA_PTR;
31
32 #define COMMAND_LINE_OFFSET 0x9000
33
bootm_announce_and_cleanup(void)34 void bootm_announce_and_cleanup(void)
35 {
36 printf("\nStarting kernel ...\n\n");
37
38 #ifdef CONFIG_SYS_COREBOOT
39 timestamp_add_now(TS_U_BOOT_START_KERNEL);
40 #endif
41 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
42 #if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
43 bootstage_report();
44 #endif
45
46 /*
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.
50 */
51 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
52 }
53
54 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
arch_fixup_memory_node(void * blob)55 int arch_fixup_memory_node(void *blob)
56 {
57 struct bd_info *bd = gd->bd;
58 int bank;
59 u64 start[CONFIG_NR_DRAM_BANKS];
60 u64 size[CONFIG_NR_DRAM_BANKS];
61
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;
65 }
66
67 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
68 }
69 #endif
70
71 /* Subcommand: PREP */
boot_prep_linux(bootm_headers_t * images)72 static int boot_prep_linux(bootm_headers_t *images)
73 {
74 char *cmd_line_dest = NULL;
75 image_header_t *hdr;
76 int is_zimage = 0;
77 void *data = NULL;
78 size_t len;
79 int ret;
80
81 #ifdef CONFIG_OF_LIBFDT
82 if (images->ft_len) {
83 debug("using: FDT\n");
84 if (image_setup_linux(images)) {
85 puts("FDT creation failed! hanging...");
86 hang();
87 }
88 }
89 #endif
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;
94
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;
98 len = os_len;
99 } else {
100 /* otherwise get image data */
101 data = (void *)image_get_data(hdr);
102 len = image_get_data_size(hdr);
103 }
104 is_zimage = 1;
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);
110 if (ret) {
111 puts("Can't get image data/size!\n");
112 goto error;
113 }
114 is_zimage = 1;
115 #endif
116 }
117
118 if (is_zimage) {
119 ulong load_address;
120 char *base_ptr;
121
122 base_ptr = (char *)load_zimage(data, len, &load_address);
123 if (!base_ptr) {
124 puts("## Kernel loading failed ...\n");
125 goto error;
126 }
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;
132 } else {
133 printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
134 goto error;
135 }
136
137 printf("Setup at %#08lx\n", images->ep);
138 ret = setup_zimage((void *)images->ep, cmd_line_dest,
139 0, images->rd_start,
140 images->rd_end - images->rd_start, 0);
141
142 if (ret) {
143 printf("## Setting up boot parameters failed ...\n");
144 return 1;
145 }
146
147 return 0;
148
149 error:
150 return 1;
151 }
152
boot_linux_kernel(ulong setup_base,ulong load_address,bool image_64bit)153 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
154 {
155 bootm_announce_and_cleanup();
156
157 #ifdef CONFIG_SYS_COREBOOT
158 timestamp_add_now(TS_U_BOOT_START_KERNEL);
159 #endif
160 if (image_64bit) {
161 if (!cpu_has_64bit()) {
162 puts("Cannot boot 64-bit kernel on 32-bit machine\n");
163 return -EFAULT;
164 }
165 /* At present 64-bit U-Boot does not support booting a
166 * kernel.
167 * TODO(sjg@chromium.org): Support booting both 32-bit and
168 * 64-bit kernels from 64-bit U-Boot.
169 */
170 #if !CONFIG_IS_ENABLED(X86_64)
171 return cpu_jump_to_64bit(setup_base, load_address);
172 #endif
173 } else {
174 /*
175 * Set %ebx, %ebp, and %edi to 0, %esi to point to the
176 * boot_params structure, and then jump to the kernel. We
177 * assume that %cs is 0x10, 4GB flat, and read/execute, and
178 * the data segments are 0x18, 4GB flat, and read/write.
179 * U-Boot is setting them up that way for itself in
180 * arch/i386/cpu/cpu.c.
181 *
182 * Note that we cannot currently boot a kernel while running as
183 * an EFI application. Please use the payload option for that.
184 */
185 #ifndef CONFIG_EFI_APP
186 __asm__ __volatile__ (
187 "movl $0, %%ebp\n"
188 "cli\n"
189 "jmp *%[kernel_entry]\n"
190 :: [kernel_entry]"a"(load_address),
191 [boot_params] "S"(setup_base),
192 "b"(0), "D"(0)
193 );
194 #endif
195 }
196
197 /* We can't get to here */
198 return -EFAULT;
199 }
200
201 /* Subcommand: GO */
boot_jump_linux(bootm_headers_t * images)202 static int boot_jump_linux(bootm_headers_t *images)
203 {
204 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
205 images->ep, images->os.load);
206
207 return boot_linux_kernel(images->ep, images->os.load,
208 images->os.arch == IH_ARCH_X86_64);
209 }
210
do_bootm_linux(int flag,int argc,char * const argv[],bootm_headers_t * images)211 int do_bootm_linux(int flag, int argc, char *const argv[],
212 bootm_headers_t *images)
213 {
214 /* No need for those on x86 */
215 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
216 return -1;
217
218 if (flag & BOOTM_STATE_OS_PREP)
219 return boot_prep_linux(images);
220
221 if (flag & BOOTM_STATE_OS_GO)
222 return boot_jump_linux(images);
223
224 return boot_jump_linux(images);
225 }
226