Merge branch 'staging'
[oweals/u-boot.git] / arch / arm / cpu / armv7 / omap-common / spl.c
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 <asm/u-boot.h>
27 #include <asm/utils.h>
28 #include <asm/arch/sys_proto.h>
29 #include <nand.h>
30 #include <mmc.h>
31 #include <fat.h>
32 #include <version.h>
33 #include <asm/omap_common.h>
34 #include <asm/arch/mmc_host_def.h>
35 #include <i2c.h>
36 #include <image.h>
37 #include <malloc.h>
38 #include <linux/compiler.h>
39
40 DECLARE_GLOBAL_DATA_PTR;
41
42 u32* boot_params_ptr = NULL;
43 struct spl_image_info spl_image;
44
45 /* Define global data structure pointer to it*/
46 static gd_t gdata __attribute__ ((section(".data")));
47 static bd_t bdata __attribute__ ((section(".data")));
48
49 inline void hang(void)
50 {
51         puts("### ERROR ### Please RESET the board ###\n");
52         for (;;)
53                 ;
54 }
55
56 void board_init_f(ulong dummy)
57 {
58         /*
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
62          * all we need
63          */
64         debug(">>board_init_f()\n");
65         relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
66 }
67
68 void spl_parse_image_header(const struct image_header *header)
69 {
70         u32 header_size = sizeof(struct image_header);
71
72         if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
73                 spl_image.size = __be32_to_cpu(header->ih_size) + header_size;
74                 spl_image.entry_point = __be32_to_cpu(header->ih_load);
75                 /* Load including the header */
76                 spl_image.load_addr = spl_image.entry_point - header_size;
77                 spl_image.os = header->ih_os;
78                 spl_image.name = (const char *)&header->ih_name;
79                 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
80                         spl_image.name, spl_image.load_addr, spl_image.size);
81         } else {
82                 /* Signature not found - assume u-boot.bin */
83                 printf("mkimage signature not found - ih_magic = %x\n",
84                         header->ih_magic);
85                 puts("Assuming u-boot.bin ..\n");
86                 /* Let's assume U-Boot will not be more than 200 KB */
87                 spl_image.size = 200 * 1024;
88                 spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
89                 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
90                 spl_image.os = IH_OS_U_BOOT;
91                 spl_image.name = "U-Boot";
92         }
93 }
94
95 static void jump_to_image_no_args(void)
96 {
97         typedef void (*image_entry_noargs_t)(u32 *)__attribute__ ((noreturn));
98         image_entry_noargs_t image_entry =
99                         (image_entry_noargs_t) spl_image.entry_point;
100
101         debug("image entry point: 0x%X\n", spl_image.entry_point);
102         /* Pass the saved boot_params from rom code */
103 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
104         image_entry = (image_entry_noargs_t)0x80100000;
105 #endif
106         u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
107         image_entry((u32 *)boot_params_ptr_addr);
108 }
109
110 void jump_to_image_no_args(void) __attribute__ ((noreturn));
111 void board_init_r(gd_t *id, ulong dummy)
112 {
113         u32 boot_device;
114         debug(">>spl:board_init_r()\n");
115
116         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
117                         CONFIG_SYS_SPL_MALLOC_SIZE);
118
119 #ifdef CONFIG_SPL_BOARD_INIT
120         spl_board_init();
121 #endif
122
123         boot_device = omap_boot_device();
124         debug("boot device - %d\n", boot_device);
125         switch (boot_device) {
126 #ifdef CONFIG_SPL_MMC_SUPPORT
127         case BOOT_DEVICE_MMC1:
128         case BOOT_DEVICE_MMC2:
129                 spl_mmc_load_image();
130                 break;
131 #endif
132 #ifdef CONFIG_SPL_NAND_SUPPORT
133         case BOOT_DEVICE_NAND:
134                 spl_nand_load_image();
135                 break;
136 #endif
137         default:
138                 printf("SPL: Un-supported Boot Device - %d!!!\n", boot_device);
139                 hang();
140                 break;
141         }
142
143         switch (spl_image.os) {
144         case IH_OS_U_BOOT:
145                 debug("Jumping to U-Boot\n");
146                 jump_to_image_no_args();
147                 break;
148         default:
149                 puts("Unsupported OS image.. Jumping nevertheless..\n");
150                 jump_to_image_no_args();
151         }
152 }
153
154 /* This requires UART clocks to be enabled */
155 void preloader_console_init(void)
156 {
157         const char *u_boot_rev = U_BOOT_VERSION;
158
159         gd = &gdata;
160         gd->bd = &bdata;
161         gd->flags |= GD_FLG_RELOC;
162         gd->baudrate = CONFIG_BAUDRATE;
163
164         serial_init();          /* serial communications setup */
165
166         gd->have_console = 1;
167
168         /* Avoid a second "U-Boot" coming from this string */
169         u_boot_rev = &u_boot_rev[7];
170
171         printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
172                 U_BOOT_TIME);
173         omap_rev_string();
174 }
175
176 void __weak omap_rev_string()
177 {
178         printf("Texas Instruments Revision detection unimplemented\n");
179 }