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,
26 #include <asm/u-boot.h>
27 #include <asm/utils.h>
28 #include <asm/arch/sys_proto.h>
33 #include <asm/omap_common.h>
34 #include <asm/arch/mmc_host_def.h>
38 #include <linux/compiler.h>
40 DECLARE_GLOBAL_DATA_PTR;
42 u32* boot_params_ptr = NULL;
43 struct spl_image_info spl_image;
45 /* Define global data structure pointer to it*/
46 static gd_t gdata __attribute__ ((section(".data")));
47 static bd_t bdata __attribute__ ((section(".data")));
49 inline void hang(void)
51 puts("### ERROR ### Please RESET the board ###\n");
56 void board_init_f(ulong dummy)
59 * We call relocate_code() with relocation target same as the
60 * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
61 * skipped. Instead, only .bss initialization will happen. That's
64 debug(">>board_init_f()\n");
65 relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
69 * Default function to determine if u-boot or the OS should
70 * be started. This implementation always returns 1.
72 * Please implement your own board specific funcion to do this.
75 * 0 to not start u-boot
76 * positive if u-boot should start
78 #ifdef CONFIG_SPL_OS_BOOT
79 __weak int spl_start_uboot(void)
81 printf("SPL: Please implement spl_start_uboot() for your board\n");
82 printf("SPL: Direct Linux boot not active!\n");
87 void spl_parse_image_header(const struct image_header *header)
89 u32 header_size = sizeof(struct image_header);
91 if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
92 spl_image.size = __be32_to_cpu(header->ih_size) + header_size;
93 spl_image.entry_point = __be32_to_cpu(header->ih_load);
94 /* Load including the header */
95 spl_image.load_addr = spl_image.entry_point - header_size;
96 spl_image.os = header->ih_os;
97 spl_image.name = (const char *)&header->ih_name;
98 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
99 spl_image.name, spl_image.load_addr, spl_image.size);
101 /* Signature not found - assume u-boot.bin */
102 printf("mkimage signature not found - ih_magic = %x\n",
104 debug("Assuming u-boot.bin ..\n");
105 /* Let's assume U-Boot will not be more than 200 KB */
106 spl_image.size = 200 * 1024;
107 spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
108 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
109 spl_image.os = IH_OS_U_BOOT;
110 spl_image.name = "U-Boot";
115 * This function jumps to an image with argument. Normally an FDT or ATAGS
117 * arg: Pointer to paramter image in RAM
119 #ifdef CONFIG_SPL_OS_BOOT
120 static void __noreturn jump_to_image_linux(void *arg)
122 debug("Entering kernel arg pointer: 0x%p\n", arg);
123 typedef void (*image_entry_arg_t)(int, int, void *)
124 __attribute__ ((noreturn));
125 image_entry_arg_t image_entry =
126 (image_entry_arg_t) spl_image.entry_point;
127 cleanup_before_linux();
128 image_entry(0, CONFIG_MACH_TYPE, arg);
132 static void __noreturn jump_to_image_no_args(void)
134 typedef void __noreturn (*image_entry_noargs_t)(u32 *);
135 image_entry_noargs_t image_entry =
136 (image_entry_noargs_t) spl_image.entry_point;
138 debug("image entry point: 0x%X\n", spl_image.entry_point);
139 /* Pass the saved boot_params from rom code */
140 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
141 image_entry = (image_entry_noargs_t)0x80100000;
143 u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
144 image_entry((u32 *)boot_params_ptr_addr);
147 void board_init_r(gd_t *id, ulong dummy)
150 debug(">>spl:board_init_r()\n");
152 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
153 CONFIG_SYS_SPL_MALLOC_SIZE);
155 #ifdef CONFIG_SPL_BOARD_INIT
159 boot_device = omap_boot_device();
160 debug("boot device - %d\n", boot_device);
161 switch (boot_device) {
162 #ifdef CONFIG_SPL_MMC_SUPPORT
163 case BOOT_DEVICE_MMC1:
164 case BOOT_DEVICE_MMC2:
165 case BOOT_DEVICE_MMC2_2:
166 spl_mmc_load_image();
169 #ifdef CONFIG_SPL_NAND_SUPPORT
170 case BOOT_DEVICE_NAND:
171 spl_nand_load_image();
174 #ifdef CONFIG_SPL_YMODEM_SUPPORT
175 case BOOT_DEVICE_UART:
176 spl_ymodem_load_image();
180 printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
185 switch (spl_image.os) {
187 debug("Jumping to U-Boot\n");
188 jump_to_image_no_args();
190 #ifdef CONFIG_SPL_OS_BOOT
192 debug("Jumping to Linux\n");
193 spl_board_prepare_for_linux();
194 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
198 puts("Unsupported OS image.. Jumping nevertheless..\n");
199 jump_to_image_no_args();
203 /* This requires UART clocks to be enabled */
204 void preloader_console_init(void)
206 const char *u_boot_rev = U_BOOT_VERSION;
210 gd->flags |= GD_FLG_RELOC;
211 gd->baudrate = CONFIG_BAUDRATE;
213 serial_init(); /* serial communications setup */
215 gd->have_console = 1;
217 /* Avoid a second "U-Boot" coming from this string */
218 u_boot_rev = &u_boot_rev[7];
220 printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
225 void __weak omap_rev_string()
227 printf("Texas Instruments Revision detection unimplemented\n");