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>
14 #include <dm/device.h>
17 #include <fdt_support.h>
19 #include <u-boot/zlib.h>
20 #include <asm/bootparam.h>
22 #include <asm/byteorder.h>
23 #include <asm/zimage.h>
24 #ifdef CONFIG_SYS_COREBOOT
25 #include <asm/arch/timestamp.h>
28 DECLARE_GLOBAL_DATA_PTR
;
30 #define COMMAND_LINE_OFFSET 0x9000
32 void bootm_announce_and_cleanup(void)
34 printf("\nStarting kernel ...\n\n");
36 #ifdef CONFIG_SYS_COREBOOT
37 timestamp_add_now(TS_U_BOOT_START_KERNEL
);
39 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF
, "start_kernel");
40 #if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
45 * Call remove function of all devices with a removal flag set.
46 * This may be useful for last-stage operations, like cancelling
47 * of DMA operation or releasing device internal buffers.
49 dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL
);
52 #if defined(CONFIG_OF_LIBFDT) && !defined(CONFIG_OF_NO_KERNEL)
53 int arch_fixup_memory_node(void *blob
)
57 u64 start
[CONFIG_NR_DRAM_BANKS
];
58 u64 size
[CONFIG_NR_DRAM_BANKS
];
60 for (bank
= 0; bank
< CONFIG_NR_DRAM_BANKS
; bank
++) {
61 start
[bank
] = bd
->bi_dram
[bank
].start
;
62 size
[bank
] = bd
->bi_dram
[bank
].size
;
65 return fdt_fixup_memory_banks(blob
, start
, size
, CONFIG_NR_DRAM_BANKS
);
69 /* Subcommand: PREP */
70 static int boot_prep_linux(bootm_headers_t
*images
)
72 char *cmd_line_dest
= NULL
;
79 #ifdef CONFIG_OF_LIBFDT
81 debug("using: FDT\n");
82 if (image_setup_linux(images
)) {
83 puts("FDT creation failed! hanging...");
88 if (images
->legacy_hdr_valid
) {
89 hdr
= images
->legacy_hdr_os
;
90 if (image_check_type(hdr
, IH_TYPE_MULTI
)) {
91 ulong os_data
, os_len
;
93 /* if multi-part image, we need to get first subimage */
94 image_multi_getimg(hdr
, 0, &os_data
, &os_len
);
95 data
= (void *)os_data
;
98 /* otherwise get image data */
99 data
= (void *)image_get_data(hdr
);
100 len
= image_get_data_size(hdr
);
103 #if defined(CONFIG_FIT)
104 } else if (images
->fit_uname_os
&& is_zimage
) {
105 ret
= fit_image_get_data(images
->fit_hdr_os
,
106 images
->fit_noffset_os
,
107 (const void **)&data
, &len
);
109 puts("Can't get image data/size!\n");
120 base_ptr
= (char *)load_zimage(data
, len
, &load_address
);
122 puts("## Kernel loading failed ...\n");
125 images
->os
.load
= load_address
;
126 cmd_line_dest
= base_ptr
+ COMMAND_LINE_OFFSET
;
127 images
->ep
= (ulong
)base_ptr
;
128 } else if (images
->ep
) {
129 cmd_line_dest
= (void *)images
->ep
+ COMMAND_LINE_OFFSET
;
131 printf("## Kernel loading failed (missing x86 kernel setup) ...\n");
135 printf("Setup at %#08lx\n", images
->ep
);
136 ret
= setup_zimage((void *)images
->ep
, cmd_line_dest
,
138 images
->rd_end
- images
->rd_start
);
141 printf("## Setting up boot parameters failed ...\n");
151 int boot_linux_kernel(ulong setup_base
, ulong load_address
, bool image_64bit
)
153 bootm_announce_and_cleanup();
155 #ifdef CONFIG_SYS_COREBOOT
156 timestamp_add_now(TS_U_BOOT_START_KERNEL
);
159 if (!cpu_has_64bit()) {
160 puts("Cannot boot 64-bit kernel on 32-bit machine\n");
163 /* At present 64-bit U-Boot does not support booting a
165 * TODO(sjg@chromium.org): Support booting both 32-bit and
166 * 64-bit kernels from 64-bit U-Boot.
168 #if !CONFIG_IS_ENABLED(X86_64)
169 return cpu_jump_to_64bit(setup_base
, load_address
);
173 * Set %ebx, %ebp, and %edi to 0, %esi to point to the
174 * boot_params structure, and then jump to the kernel. We
175 * assume that %cs is 0x10, 4GB flat, and read/execute, and
176 * the data segments are 0x18, 4GB flat, and read/write.
177 * U-Boot is setting them up that way for itself in
178 * arch/i386/cpu/cpu.c.
180 * Note that we cannot currently boot a kernel while running as
181 * an EFI application. Please use the payload option for that.
183 #ifndef CONFIG_EFI_APP
184 __asm__
__volatile__ (
187 "jmp *%[kernel_entry]\n"
188 :: [kernel_entry
]"a"(load_address
),
189 [boot_params
] "S"(setup_base
),
195 /* We can't get to here */
200 static int boot_jump_linux(bootm_headers_t
*images
)
202 debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n",
203 images
->ep
, images
->os
.load
);
205 return boot_linux_kernel(images
->ep
, images
->os
.load
,
206 images
->os
.arch
== IH_ARCH_X86_64
);
209 int do_bootm_linux(int flag
, int argc
, char *const argv
[],
210 bootm_headers_t
*images
)
212 /* No need for those on x86 */
213 if (flag
& BOOTM_STATE_OS_BD_T
|| flag
& BOOTM_STATE_OS_CMDLINE
)
216 if (flag
& BOOTM_STATE_OS_PREP
)
217 return boot_prep_linux(images
);
219 if (flag
& BOOTM_STATE_OS_GO
)
220 return boot_jump_linux(images
);
222 return boot_jump_linux(images
);