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1 /*
2  * (C) Copyright 2010
3  * Texas Instruments, <www.ti.com>
4  *
5  * Aneesh V <aneesh@ti.com>
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
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.
14  *
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.
19  *
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,
23  * MA 02111-1307 USA
24  */
25 #include <common.h>
26 #include <spl.h>
27 #include <asm/u-boot.h>
28 #include <nand.h>
29 #include <fat.h>
30 #include <version.h>
31 #include <i2c.h>
32 #include <image.h>
33 #include <malloc.h>
34 #include <linux/compiler.h>
35
36 DECLARE_GLOBAL_DATA_PTR;
37
38 #ifndef CONFIG_SYS_UBOOT_START
39 #define CONFIG_SYS_UBOOT_START  CONFIG_SYS_TEXT_BASE
40 #endif
41 #ifndef CONFIG_SYS_MONITOR_LEN
42 #define CONFIG_SYS_MONITOR_LEN  (200 * 1024)
43 #endif
44
45 u32 *boot_params_ptr = NULL;
46 struct spl_image_info spl_image;
47
48 /* Define board data structure */
49 static bd_t bdata __attribute__ ((section(".data")));
50
51 inline void hang(void)
52 {
53         puts("### ERROR ### Please RESET the board ###\n");
54         for (;;)
55                 ;
56 }
57
58 /*
59  * Default function to determine if u-boot or the OS should
60  * be started. This implementation always returns 1.
61  *
62  * Please implement your own board specific funcion to do this.
63  *
64  * RETURN
65  * 0 to not start u-boot
66  * positive if u-boot should start
67  */
68 #ifdef CONFIG_SPL_OS_BOOT
69 __weak int spl_start_uboot(void)
70 {
71         puts("SPL: Please implement spl_start_uboot() for your board\n");
72         puts("SPL: Direct Linux boot not active!\n");
73         return 1;
74 }
75 #endif
76
77 /*
78  * Weak default function for board specific cleanup/preparation before
79  * Linux boot. Some boards/platforms might not need it, so just provide
80  * an empty stub here.
81  */
82 __weak void spl_board_prepare_for_linux(void)
83 {
84         /* Nothing to do! */
85 }
86
87 void spl_parse_image_header(const struct image_header *header)
88 {
89         u32 header_size = sizeof(struct image_header);
90
91         if (image_get_magic(header) == IH_MAGIC) {
92                 if (spl_image.flags & SPL_COPY_PAYLOAD_ONLY) {
93                         /*
94                          * On some system (e.g. powerpc), the load-address and
95                          * entry-point is located at address 0. We can't load
96                          * to 0-0x40. So skip header in this case.
97                          */
98                         spl_image.load_addr = image_get_load(header);
99                         spl_image.entry_point = image_get_ep(header);
100                         spl_image.size = image_get_data_size(header);
101                 } else {
102                         spl_image.entry_point = image_get_load(header);
103                         /* Load including the header */
104                         spl_image.load_addr = spl_image.entry_point -
105                                 header_size;
106                         spl_image.size = image_get_data_size(header) +
107                                 header_size;
108                 }
109                 spl_image.os = image_get_os(header);
110                 spl_image.name = image_get_name(header);
111                 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
112                         spl_image.name, spl_image.load_addr, spl_image.size);
113         } else {
114                 /* Signature not found - assume u-boot.bin */
115                 debug("mkimage signature not found - ih_magic = %x\n",
116                         header->ih_magic);
117                 /* Let's assume U-Boot will not be more than 200 KB */
118                 spl_image.size = CONFIG_SYS_MONITOR_LEN;
119                 spl_image.entry_point = CONFIG_SYS_UBOOT_START;
120                 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
121                 spl_image.os = IH_OS_U_BOOT;
122                 spl_image.name = "U-Boot";
123         }
124 }
125
126 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
127 {
128         typedef void __noreturn (*image_entry_noargs_t)(u32 *);
129         image_entry_noargs_t image_entry =
130                         (image_entry_noargs_t) spl_image->entry_point;
131
132         debug("image entry point: 0x%X\n", spl_image->entry_point);
133         /* Pass the saved boot_params from rom code */
134 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
135         image_entry = (image_entry_noargs_t)0x80100000;
136 #endif
137         u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
138         image_entry((u32 *)boot_params_ptr_addr);
139 }
140
141 #ifdef CONFIG_SPL_RAM_DEVICE
142 static void spl_ram_load_image(void)
143 {
144         const struct image_header *header;
145
146         /*
147          * Get the header.  It will point to an address defined by handoff
148          * which will tell where the image located inside the flash. For
149          * now, it will temporary fixed to address pointed by U-Boot.
150          */
151         header = (struct image_header *)
152                 (CONFIG_SYS_TEXT_BASE - sizeof(struct image_header));
153
154         spl_parse_image_header(header);
155 }
156 #endif
157
158 void board_init_r(gd_t *dummy1, ulong dummy2)
159 {
160         u32 boot_device;
161         debug(">>spl:board_init_r()\n");
162
163 #ifdef CONFIG_SYS_SPL_MALLOC_START
164         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
165                         CONFIG_SYS_SPL_MALLOC_SIZE);
166 #endif
167
168 #ifndef CONFIG_PPC
169         /*
170          * timer_init() does not exist on PPC systems. The timer is initialized
171          * and enabled (decrementer) in interrupt_init() here.
172          */
173         timer_init();
174 #endif
175
176 #ifdef CONFIG_SPL_BOARD_INIT
177         spl_board_init();
178 #endif
179
180         boot_device = spl_boot_device();
181         debug("boot device - %d\n", boot_device);
182         switch (boot_device) {
183 #ifdef CONFIG_SPL_RAM_DEVICE
184         case BOOT_DEVICE_RAM:
185                 spl_ram_load_image();
186                 break;
187 #endif
188 #ifdef CONFIG_SPL_MMC_SUPPORT
189         case BOOT_DEVICE_MMC1:
190         case BOOT_DEVICE_MMC2:
191         case BOOT_DEVICE_MMC2_2:
192                 spl_mmc_load_image();
193                 break;
194 #endif
195 #ifdef CONFIG_SPL_NAND_SUPPORT
196         case BOOT_DEVICE_NAND:
197                 spl_nand_load_image();
198                 break;
199 #endif
200 #ifdef CONFIG_SPL_ONENAND_SUPPORT
201         case BOOT_DEVICE_ONENAND:
202                 spl_onenand_load_image();
203                 break;
204 #endif
205 #ifdef CONFIG_SPL_NOR_SUPPORT
206         case BOOT_DEVICE_NOR:
207                 spl_nor_load_image();
208                 break;
209 #endif
210 #ifdef CONFIG_SPL_YMODEM_SUPPORT
211         case BOOT_DEVICE_UART:
212                 spl_ymodem_load_image();
213                 break;
214 #endif
215 #ifdef CONFIG_SPL_SPI_SUPPORT
216         case BOOT_DEVICE_SPI:
217                 spl_spi_load_image();
218                 break;
219 #endif
220 #ifdef CONFIG_SPL_ETH_SUPPORT
221         case BOOT_DEVICE_CPGMAC:
222 #ifdef CONFIG_SPL_ETH_DEVICE
223                 spl_net_load_image(CONFIG_SPL_ETH_DEVICE);
224 #else
225                 spl_net_load_image(NULL);
226 #endif
227                 break;
228 #endif
229 #ifdef CONFIG_SPL_USBETH_SUPPORT
230         case BOOT_DEVICE_USBETH:
231                 spl_net_load_image("usb_ether");
232                 break;
233 #endif
234         default:
235                 debug("SPL: Un-supported Boot Device\n");
236                 hang();
237         }
238
239         switch (spl_image.os) {
240         case IH_OS_U_BOOT:
241                 debug("Jumping to U-Boot\n");
242                 break;
243 #ifdef CONFIG_SPL_OS_BOOT
244         case IH_OS_LINUX:
245                 debug("Jumping to Linux\n");
246                 spl_board_prepare_for_linux();
247                 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
248 #endif
249         default:
250                 debug("Unsupported OS image.. Jumping nevertheless..\n");
251         }
252         jump_to_image_no_args(&spl_image);
253 }
254
255 /*
256  * This requires UART clocks to be enabled.  In order for this to work the
257  * caller must ensure that the gd pointer is valid.
258  */
259 void preloader_console_init(void)
260 {
261         gd->bd = &bdata;
262         gd->baudrate = CONFIG_BAUDRATE;
263
264         serial_init();          /* serial communications setup */
265
266         gd->have_console = 1;
267
268         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
269                         U_BOOT_TIME ")\n");
270 #ifdef CONFIG_SPL_DISPLAY_PRINT
271         spl_display_print();
272 #endif
273 }