3 * Texas Instruments, <www.ti.com>
5 * Aneesh V <aneesh@ti.com>
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <asm/u-boot.h>
34 #include <linux/compiler.h>
36 DECLARE_GLOBAL_DATA_PTR;
38 u32 *boot_params_ptr = NULL;
39 struct spl_image_info spl_image;
41 /* Define global data structure pointer to it*/
42 static gd_t gdata __attribute__ ((section(".data")));
43 static bd_t bdata __attribute__ ((section(".data")));
45 inline void hang(void)
47 puts("### ERROR ### Please RESET the board ###\n");
52 void board_init_f(ulong dummy)
55 * We call relocate_code() with relocation target same as the
56 * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
57 * skipped. Instead, only .bss initialization will happen. That's
60 debug(">>board_init_f()\n");
61 relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
65 * Default function to determine if u-boot or the OS should
66 * be started. This implementation always returns 1.
68 * Please implement your own board specific funcion to do this.
71 * 0 to not start u-boot
72 * positive if u-boot should start
74 #ifdef CONFIG_SPL_OS_BOOT
75 __weak int spl_start_uboot(void)
77 puts("SPL: Please implement spl_start_uboot() for your board\n");
78 puts("SPL: Direct Linux boot not active!\n");
83 void spl_parse_image_header(const struct image_header *header)
85 u32 header_size = sizeof(struct image_header);
87 if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
88 spl_image.size = __be32_to_cpu(header->ih_size) + header_size;
89 spl_image.entry_point = __be32_to_cpu(header->ih_load);
90 /* Load including the header */
91 spl_image.load_addr = spl_image.entry_point - header_size;
92 spl_image.os = header->ih_os;
93 spl_image.name = (const char *)&header->ih_name;
94 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
95 spl_image.name, spl_image.load_addr, spl_image.size);
97 /* Signature not found - assume u-boot.bin */
98 puts("mkimage signature not found, assuming u-boot.bin ..\n");
99 debug("mkimage signature not found - ih_magic = %x\n",
101 /* Let's assume U-Boot will not be more than 200 KB */
102 spl_image.size = 200 * 1024;
103 spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
104 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
105 spl_image.os = IH_OS_U_BOOT;
106 spl_image.name = "U-Boot";
111 * This function jumps to an image with argument. Normally an FDT or ATAGS
113 * arg: Pointer to paramter image in RAM
115 #ifdef CONFIG_SPL_OS_BOOT
116 static void __noreturn jump_to_image_linux(void *arg)
118 debug("Entering kernel arg pointer: 0x%p\n", arg);
119 typedef void (*image_entry_arg_t)(int, int, void *)
120 __attribute__ ((noreturn));
121 image_entry_arg_t image_entry =
122 (image_entry_arg_t) spl_image.entry_point;
123 cleanup_before_linux();
124 image_entry(0, CONFIG_MACH_TYPE, arg);
128 static void __noreturn jump_to_image_no_args(void)
130 typedef void __noreturn (*image_entry_noargs_t)(u32 *);
131 image_entry_noargs_t image_entry =
132 (image_entry_noargs_t) spl_image.entry_point;
134 debug("image entry point: 0x%X\n", spl_image.entry_point);
135 /* Pass the saved boot_params from rom code */
136 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
137 image_entry = (image_entry_noargs_t)0x80100000;
139 u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
140 image_entry((u32 *)boot_params_ptr_addr);
143 void board_init_r(gd_t *id, ulong dummy)
146 debug(">>spl:board_init_r()\n");
148 #ifdef CONFIG_SYS_SPL_MALLOC_START
149 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
150 CONFIG_SYS_SPL_MALLOC_SIZE);
153 #ifdef CONFIG_SPL_BOARD_INIT
157 boot_device = spl_boot_device();
158 debug("boot device - %d\n", boot_device);
159 switch (boot_device) {
160 #ifdef CONFIG_SPL_MMC_SUPPORT
161 case BOOT_DEVICE_MMC1:
162 case BOOT_DEVICE_MMC2:
163 case BOOT_DEVICE_MMC2_2:
164 spl_mmc_load_image();
167 #ifdef CONFIG_SPL_NAND_SUPPORT
168 case BOOT_DEVICE_NAND:
169 spl_nand_load_image();
172 #ifdef CONFIG_SPL_YMODEM_SUPPORT
173 case BOOT_DEVICE_UART:
174 spl_ymodem_load_image();
177 #ifdef CONFIG_SPL_SPI_SUPPORT
178 case BOOT_DEVICE_SPI:
183 puts("SPL: Un-supported Boot Device\n");
184 debug("Found: %d\n", boot_device);
189 switch (spl_image.os) {
191 debug("Jumping to U-Boot\n");
192 jump_to_image_no_args();
194 #ifdef CONFIG_SPL_OS_BOOT
196 debug("Jumping to Linux\n");
197 spl_board_prepare_for_linux();
198 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
202 puts("Unsupported OS image.. Jumping nevertheless..\n");
203 jump_to_image_no_args();
207 /* This requires UART clocks to be enabled */
208 void preloader_console_init(void)
212 gd->flags |= GD_FLG_RELOC;
213 gd->baudrate = CONFIG_BAUDRATE;
215 serial_init(); /* serial communications setup */
217 gd->have_console = 1;
219 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
221 #ifdef CONFIG_SPL_DISPLAY_PRINT