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SPL: Create arch/arm/lib/spl.c for board_init_f and jump_to_image_linux
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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 u32 *boot_params_ptr = NULL;
39 struct spl_image_info spl_image;
40
41 /* Define board data structure */
42 static bd_t bdata __attribute__ ((section(".data")));
43
44 inline void hang(void)
45 {
46         puts("### ERROR ### Please RESET the board ###\n");
47         for (;;)
48                 ;
49 }
50
51 /*
52  * Default function to determine if u-boot or the OS should
53  * be started. This implementation always returns 1.
54  *
55  * Please implement your own board specific funcion to do this.
56  *
57  * RETURN
58  * 0 to not start u-boot
59  * positive if u-boot should start
60  */
61 #ifdef CONFIG_SPL_OS_BOOT
62 __weak int spl_start_uboot(void)
63 {
64         puts("SPL: Please implement spl_start_uboot() for your board\n");
65         puts("SPL: Direct Linux boot not active!\n");
66         return 1;
67 }
68 #endif
69
70 void spl_parse_image_header(const struct image_header *header)
71 {
72         u32 header_size = sizeof(struct image_header);
73
74         if (__be32_to_cpu(header->ih_magic) == IH_MAGIC) {
75                 spl_image.size = __be32_to_cpu(header->ih_size) + header_size;
76                 spl_image.entry_point = __be32_to_cpu(header->ih_load);
77                 /* Load including the header */
78                 spl_image.load_addr = spl_image.entry_point - header_size;
79                 spl_image.os = header->ih_os;
80                 spl_image.name = (const char *)&header->ih_name;
81                 debug("spl: payload image: %s load addr: 0x%x size: %d\n",
82                         spl_image.name, spl_image.load_addr, spl_image.size);
83         } else {
84                 /* Signature not found - assume u-boot.bin */
85                 puts("mkimage signature not found, assuming u-boot.bin ..\n");
86                 debug("mkimage signature not found - ih_magic = %x\n",
87                         header->ih_magic);
88                 /* Let's assume U-Boot will not be more than 200 KB */
89                 spl_image.size = 200 * 1024;
90                 spl_image.entry_point = CONFIG_SYS_TEXT_BASE;
91                 spl_image.load_addr = CONFIG_SYS_TEXT_BASE;
92                 spl_image.os = IH_OS_U_BOOT;
93                 spl_image.name = "U-Boot";
94         }
95 }
96
97 static void __noreturn jump_to_image_no_args(void)
98 {
99         typedef void __noreturn (*image_entry_noargs_t)(u32 *);
100         image_entry_noargs_t image_entry =
101                         (image_entry_noargs_t) spl_image.entry_point;
102
103         debug("image entry point: 0x%X\n", spl_image.entry_point);
104         /* Pass the saved boot_params from rom code */
105 #if defined(CONFIG_VIRTIO) || defined(CONFIG_ZEBU)
106         image_entry = (image_entry_noargs_t)0x80100000;
107 #endif
108         u32 boot_params_ptr_addr = (u32)&boot_params_ptr;
109         image_entry((u32 *)boot_params_ptr_addr);
110 }
111
112 void board_init_r(gd_t *dummy1, ulong dummy2)
113 {
114         u32 boot_device;
115         debug(">>spl:board_init_r()\n");
116
117 #ifdef CONFIG_SYS_SPL_MALLOC_START
118         mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
119                         CONFIG_SYS_SPL_MALLOC_SIZE);
120 #endif
121
122 #ifdef CONFIG_SPL_BOARD_INIT
123         spl_board_init();
124 #endif
125
126         boot_device = spl_boot_device();
127         debug("boot device - %d\n", boot_device);
128         switch (boot_device) {
129 #ifdef CONFIG_SPL_MMC_SUPPORT
130         case BOOT_DEVICE_MMC1:
131         case BOOT_DEVICE_MMC2:
132         case BOOT_DEVICE_MMC2_2:
133                 spl_mmc_load_image();
134                 break;
135 #endif
136 #ifdef CONFIG_SPL_NAND_SUPPORT
137         case BOOT_DEVICE_NAND:
138                 spl_nand_load_image();
139                 break;
140 #endif
141 #ifdef CONFIG_SPL_YMODEM_SUPPORT
142         case BOOT_DEVICE_UART:
143                 spl_ymodem_load_image();
144                 break;
145 #endif
146 #ifdef CONFIG_SPL_SPI_SUPPORT
147         case BOOT_DEVICE_SPI:
148                 spi_boot();
149         break;
150 #endif
151         default:
152                 puts("SPL: Un-supported Boot Device\n");
153                 debug("Found: %d\n", boot_device);
154                 hang();
155                 break;
156         }
157
158         switch (spl_image.os) {
159         case IH_OS_U_BOOT:
160                 debug("Jumping to U-Boot\n");
161                 jump_to_image_no_args();
162                 break;
163 #ifdef CONFIG_SPL_OS_BOOT
164         case IH_OS_LINUX:
165                 debug("Jumping to Linux\n");
166                 spl_board_prepare_for_linux();
167                 jump_to_image_linux((void *)CONFIG_SYS_SPL_ARGS_ADDR);
168                 break;
169 #endif
170         default:
171                 puts("Unsupported OS image.. Jumping nevertheless..\n");
172                 jump_to_image_no_args();
173         }
174 }
175
176 /*
177  * This requires UART clocks to be enabled.  In order for this to work the
178  * caller must ensure that the gd pointer is valid.
179  */
180 void preloader_console_init(void)
181 {
182         gd->bd = &bdata;
183         gd->flags |= GD_FLG_RELOC;
184         gd->baudrate = CONFIG_BAUDRATE;
185
186         serial_init();          /* serial communications setup */
187
188         gd->have_console = 1;
189
190         puts("\nU-Boot SPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
191                         U_BOOT_TIME ")\n");
192 #ifdef CONFIG_SPL_DISPLAY_PRINT
193         spl_display_print();
194 #endif
195 }