1 /*
2 * (C) Copyright 2002
3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
5 *
6 * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
7 *
8 * SPDX-License-Identifier: GPL-2.0+
9 */
10
11 #include <common.h>
12 #include <command.h>
13 #include <dm/device.h>
14 #include <dm/root.h>
15 #include <errno.h>
16 #include <fdt_support.h>
17 #include <image.h>
18 #include <u-boot/zlib.h>
19 #include <asm/bootparam.h>
20 #include <asm/cpu.h>
21 #include <asm/byteorder.h>
22 #include <asm/zimage.h>
23 #ifdef CONFIG_SYS_COREBOOT
24 #include <asm/arch/timestamp.h>
25 #endif
26
27 DECLARE_GLOBAL_DATA_PTR;
28
29 #define COMMAND_LINE_OFFSET 0x9000
30
board_quiesce_devices(void)31 __weak void board_quiesce_devices(void)
32 {
33 }
34
bootm_announce_and_cleanup(void)35 void bootm_announce_and_cleanup(void)
36 {
37 printf("\nStarting kernel ...\n\n");
38
39 #ifdef CONFIG_SYS_COREBOOT
40 timestamp_add_now(TS_U_BOOT_START_KERNEL);
41 #endif
42 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
43 #ifdef CONFIG_BOOTSTAGE_REPORT
44 bootstage_report();
45 #endif
46
47 /*
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.
51 */
52 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
53 }
54
55 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
arch_fixup_memory_node(void * blob)56 int arch_fixup_memory_node(void *blob)
57 {
58 bd_t *bd = gd->bd;
59 int bank;
60 u64 start[CONFIG_NR_DRAM_BANKS];
61 u64 size[CONFIG_NR_DRAM_BANKS];
62
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;
66 }
67
68 return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
69 }
70 #endif
71
72 /* Subcommand: PREP */
boot_prep_linux(bootm_headers_t * images)73 static int boot_prep_linux(bootm_headers_t *images)
74 {
75 char *cmd_line_dest = NULL;
76 image_header_t *hdr;
77 int is_zimage = 0;
78 void *data = NULL;
79 size_t len;
80 int ret;
81
82 #ifdef CONFIG_OF_LIBFDT
83 if (images->ft_len) {
84 debug("using: FDT\n");
85 if (image_setup_linux(images)) {
86 puts("FDT creation failed! hanging...");
87 hang();
88 }
89 }
90 #endif
91 if (images->legacy_hdr_valid) {
92 hdr = images->legacy_hdr_os;
93 if (image_check_type(hdr, IH_TYPE_MULTI)) {
94 ulong os_data, os_len;
95
96 /* if multi-part image, we need to get first subimage */
97 image_multi_getimg(hdr, 0, &os_data, &os_len);
98 data = (void *)os_data;
99 len = os_len;
100 } else {
101 /* otherwise get image data */
102 data = (void *)image_get_data(hdr);
103 len = image_get_data_size(hdr);
104 }
105 is_zimage = 1;
106 #if defined(CONFIG_FIT)
107 } else if (images->fit_uname_os) {
108 ret = fit_image_get_data(images->fit_hdr_os,
109 images->fit_noffset_os,
110 (const void **)&data, &len);
111 if (ret) {
112 puts("Can't get image data/size!\n");
113 goto error;
114 }
115 is_zimage = 1;
116 #endif
117 }
118
119 if (is_zimage) {
120 ulong load_address;
121 char *base_ptr;
122
123 base_ptr = (char *)load_zimage(data, len, &load_address);
124 images->os.load = load_address;
125 cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET;
126 images->ep = (ulong)base_ptr;
127 } else if (images->ep) {
128 cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET;
129 } else {
130 printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
131 goto error;
132 }
133
134 printf("Setup at %#08lx\n", images->ep);
135 ret = setup_zimage((void *)images->ep, cmd_line_dest,
136 0, images->rd_start,
137 images->rd_end - images->rd_start);
138
139 if (ret) {
140 printf("## Setting up boot parameters failed ...\n");
141 return 1;
142 }
143
144 return 0;
145
146 error:
147 return 1;
148 }
149
boot_linux_kernel(ulong setup_base,ulong load_address,bool image_64bit)150 int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
151 {
152 bootm_announce_and_cleanup();
153
154 #ifdef CONFIG_SYS_COREBOOT
155 timestamp_add_now(TS_U_BOOT_START_KERNEL);
156 #endif
157 if (image_64bit) {
158 if (!cpu_has_64bit()) {
159 puts("Cannot boot 64-bit kernel on 32-bit machine\n");
160 return -EFAULT;
161 }
162 /* At present 64-bit U-Boot does not support booting a
163 * kernel.
164 * TODO(sjg@chromium.org): Support booting both 32-bit and
165 * 64-bit kernels from 64-bit U-Boot.
166 */
167 #if !CONFIG_IS_ENABLED(X86_64)
168 return cpu_jump_to_64bit(setup_base, load_address);
169 #endif
170 } else {
171 /*
172 * Set %ebx, %ebp, and %edi to 0, %esi to point to the
173 * boot_params structure, and then jump to the kernel. We
174 * assume that %cs is 0x10, 4GB flat, and read/execute, and
175 * the data segments are 0x18, 4GB flat, and read/write.
176 * U-Boot is setting them up that way for itself in
177 * arch/i386/cpu/cpu.c.
178 *
179 * Note that we cannot currently boot a kernel while running as
180 * an EFI application. Please use the payload option for that.
181 */
182 #ifndef CONFIG_EFI_APP
183 __asm__ __volatile__ (
184 "movl $0, %%ebp\n"
185 "cli\n"
186 "jmp *%[kernel_entry]\n"
187 :: [kernel_entry]"a"(load_address),
188 [boot_params] "S"(setup_base),
189 "b"(0), "D"(0)
190 );
191 #endif
192 }
193
194 /* We can't get to here */
195 return -EFAULT;
196 }
197
198 /* Subcommand: GO */
boot_jump_linux(bootm_headers_t * images)199 static int boot_jump_linux(bootm_headers_t *images)
200 {
201 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
202 images->ep, images->os.load);
203
204 return boot_linux_kernel(images->ep, images->os.load,
205 images->os.arch == IH_ARCH_X86_64);
206 }
207
do_bootm_linux(int flag,int argc,char * const argv[],bootm_headers_t * images)208 int do_bootm_linux(int flag, int argc, char * const argv[],
209 bootm_headers_t *images)
210 {
211 /* No need for those on x86 */
212 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
213 return -1;
214
215 if (flag & BOOTM_STATE_OS_PREP)
216 return boot_prep_linux(images);
217
218 if (flag & BOOTM_STATE_OS_GO)
219 return boot_jump_linux(images);
220
221 return boot_jump_linux(images);
222 }
223