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 #ifndef CONFIG_SYS_UBOOT_START
39 #define CONFIG_SYS_UBOOT_START CONFIG_SYS_TEXT_BASE
41 #ifndef CONFIG_SYS_MONITOR_LEN
42 #define CONFIG_SYS_MONITOR_LEN (200 * 1024)
45 u32 *boot_params_ptr = NULL;
46 struct spl_image_info spl_image;
48 /* Define board data structure */
49 static bd_t bdata __attribute__ ((section(".data")));
52 * Default function to determine if u-boot or the OS should
53 * be started. This implementation always returns 1.
55 * Please implement your own board specific funcion to do this.
58 * 0 to not start u-boot
59 * positive if u-boot should start
61 #ifdef CONFIG_SPL_OS_BOOT
62 __weak int spl_start_uboot(void)
64 puts("SPL: Please implement spl_start_uboot() for your board\n");
65 puts("SPL: Direct Linux boot not active!\n");
71 * Weak default function for board specific cleanup/preparation before
72 * Linux boot. Some boards/platforms might not need it, so just provide
75 __weak void spl_board_prepare_for_linux(void)
80 void spl_parse_image_header(const struct image_header *header)
82 u32 header_size = sizeof(struct image_header);
84 if (image_get_magic(header) == IH_MAGIC) {
85 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) {
87 * On some system (e.g. powerpc), the load-address and
88 * entry-point is located at address 0. We can't load
89 * to 0-0x40. So skip header in this case.
91 spl_image.load_addr = image_get_load(header);
92 spl_image.entry_point = image_get_ep(header);
93 spl_image.size = image_get_data_size(header);
95 spl_image.entry_point = image_get_load(header);
96 /* Load including the header */
97 spl_image.load_addr = spl_image.entry_point -
99 spl_image.size = image_get_data_size(header) +
102 spl_image.os = image_get_os(header);
103 spl_image.name = image_get_name(header);
104 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
105 spl_image.name, spl_image.load_addr, spl_image.size);
107 /* Signature not found - assume u-boot.bin */
108 debug("mkimage signature not found - ih_magic = %x\n",
110 /* Let's assume U-Boot will not be more than 200 KB */
111 spl_image.size = CONFIG_SYS_MONITOR_LEN;
112 spl_image.entry_point = CONFIG_SYS_UBOOT_START;
113 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
114 spl_image.os = IH_OS_U_BOOT;
115 spl_image.name = "U-Boot";
119 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
121 typedef void __noreturn (*image_entry_noargs_t)(u32 *);
122 image_entry_noargs_t image_entry =
123 (image_entry_noargs_t) spl_image->entry_point;
125 debug("image entry point: 0x%X\n", spl_image->entry_point);
126 /* Pass the saved boot_params from rom code */
127 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
128 image_entry = (image_entry_noargs_t)0x80100000;
130 u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
131 image_entry((u32 *)boot_params_ptr_addr);
134 #ifdef CONFIG_SPL_RAM_DEVICE
135 static void spl_ram_load_image(void)
137 const struct image_header *header;
140 * Get the header. It will point to an address defined by handoff
141 * which will tell where the image located inside the flash. For
142 * now, it will temporary fixed to address pointed by U-Boot.
144 header = (struct image_header *)
145 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
147 spl_parse_image_header(header);
151 void board_init_r(gd_t *dummy1, ulong dummy2)
154 debug(">>spl:board_init_r()\n");
156 #ifdef CONFIG_SYS_SPL_MALLOC_START
157 mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
158 CONFIG_SYS_SPL_MALLOC_SIZE);
163 * timer_init() does not exist on PPC systems. The timer is initialized
164 * and enabled (decrementer) in interrupt_init() here.
169 #ifdef CONFIG_SPL_BOARD_INIT
173 boot_device = spl_boot_device();
174 debug("boot device - %d\n", boot_device);
175 switch (boot_device) {
176 #ifdef CONFIG_SPL_RAM_DEVICE
177 case BOOT_DEVICE_RAM:
178 spl_ram_load_image();
181 #ifdef CONFIG_SPL_MMC_SUPPORT
182 case BOOT_DEVICE_MMC1:
183 case BOOT_DEVICE_MMC2:
184 case BOOT_DEVICE_MMC2_2:
185 spl_mmc_load_image();
188 #ifdef CONFIG_SPL_NAND_SUPPORT
189 case BOOT_DEVICE_NAND:
190 spl_nand_load_image();
193 #ifdef CONFIG_SPL_ONENAND_SUPPORT
194 case BOOT_DEVICE_ONENAND:
195 spl_onenand_load_image();
198 #ifdef CONFIG_SPL_NOR_SUPPORT
199 case BOOT_DEVICE_NOR:
200 spl_nor_load_image();
203 #ifdef CONFIG_SPL_YMODEM_SUPPORT
204 case BOOT_DEVICE_UART:
205 spl_ymodem_load_image();
208 #ifdef CONFIG_SPL_SPI_SUPPORT
209 case BOOT_DEVICE_SPI:
210 spl_spi_load_image();
213 #ifdef CONFIG_SPL_ETH_SUPPORT
214 case BOOT_DEVICE_CPGMAC:
215 #ifdef CONFIG_SPL_ETH_DEVICE
216 spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
218 spl_net_load_image(NULL);
222 #ifdef CONFIG_SPL_USBETH_SUPPORT
223 case BOOT_DEVICE_USBETH:
224 spl_net_load_image("usb_ether");
228 debug("SPL: Un-supported Boot Device\n");
232 switch (spl_image.os) {
234 debug("Jumping to U-Boot\n");
236 #ifdef CONFIG_SPL_OS_BOOT
238 debug("Jumping to Linux\n");
239 spl_board_prepare_for_linux();
240 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
243 debug("Unsupported OS image.. Jumping nevertheless..\n");
245 jump_to_image_no_args(&spl_image);
249 * This requires UART clocks to be enabled. In order for this to work the
250 * caller must ensure that the gd pointer is valid.
252 void preloader_console_init(void)
255 gd->baudrate = CONFIG_BAUDRATE;
257 serial_init(); /* serial communications setup */
259 gd->have_console = 1;
261 puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
263 #ifdef CONFIG_SPL_DISPLAY_PRINT