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Wolfgang Denk7b64fef2006-10-24 14:21:16 +02001/*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22#include <common.h>
23#include <command.h>
24#include <malloc.h>
25#include <devices.h>
26#include <version.h>
27#include <net.h>
28
29#include <asm/initcalls.h>
30#include <asm/sections.h>
31
32#ifndef CONFIG_IDENT_STRING
33#define CONFIG_IDENT_STRING ""
34#endif
35
36DECLARE_GLOBAL_DATA_PTR;
37
38const char version_string[] =
39 U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ") " CONFIG_IDENT_STRING;
40
41unsigned long monitor_flash_len;
42
43/*
44 * Begin and end of memory area for malloc(), and current "brk"
45 */
46static unsigned long mem_malloc_start = 0;
47static unsigned long mem_malloc_end = 0;
48static unsigned long mem_malloc_brk = 0;
49
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +010050/* The malloc area is right below the monitor image in RAM */
Wolfgang Denk7b64fef2006-10-24 14:21:16 +020051static void mem_malloc_init(void)
52{
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +010053 unsigned long monitor_addr;
54
55 monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
56 mem_malloc_end = monitor_addr;
57 mem_malloc_start = mem_malloc_end - CFG_MALLOC_LEN;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +020058 mem_malloc_brk = mem_malloc_start;
59
60 printf("malloc: Using memory from 0x%08lx to 0x%08lx\n",
61 mem_malloc_start, mem_malloc_end);
62
63 memset ((void *)mem_malloc_start, 0,
64 mem_malloc_end - mem_malloc_start);
65}
66
67void *sbrk(ptrdiff_t increment)
68{
69 unsigned long old = mem_malloc_brk;
70 unsigned long new = old + increment;
71
72 if ((new < mem_malloc_start) || (new > mem_malloc_end))
73 return NULL;
74
75 mem_malloc_brk = new;
76 return ((void *)old);
77}
78
Haavard Skinnemoend5acb952006-12-17 15:39:15 +010079#ifdef CFG_DMA_ALLOC_LEN
80#include <asm/cacheflush.h>
81#include <asm/io.h>
82
83static unsigned long dma_alloc_start;
84static unsigned long dma_alloc_end;
85static unsigned long dma_alloc_brk;
86
87static void dma_alloc_init(void)
88{
89 unsigned long monitor_addr;
90
91 monitor_addr = CFG_MONITOR_BASE + gd->reloc_off;
92 dma_alloc_end = monitor_addr - CFG_MALLOC_LEN;
93 dma_alloc_start = dma_alloc_end - CFG_DMA_ALLOC_LEN;
94 dma_alloc_brk = dma_alloc_start;
95
96 printf("DMA: Using memory from 0x%08lx to 0x%08lx\n",
97 dma_alloc_start, dma_alloc_end);
98
99 dcache_invalidate_range(cached(dma_alloc_start),
100 dma_alloc_end - dma_alloc_start);
101}
102
103void *dma_alloc_coherent(size_t len, unsigned long *handle)
104{
105 unsigned long paddr = dma_alloc_brk;
106
107 if (dma_alloc_brk + len > dma_alloc_end)
108 return NULL;
109
110 dma_alloc_brk = ((paddr + len + CFG_DCACHE_LINESZ - 1)
111 & ~(CFG_DCACHE_LINESZ - 1));
112
113 *handle = paddr;
114 return uncached(paddr);
115}
116#else
117static inline void dma_alloc_init(void)
118{
119
120}
121#endif
122
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200123static int init_baudrate(void)
124{
125 char tmp[64];
126 int i;
127
128 i = getenv_r("baudrate", tmp, sizeof(tmp));
129 if (i > 0) {
130 gd->baudrate = simple_strtoul(tmp, NULL, 10);
131 } else {
132 gd->baudrate = CONFIG_BAUDRATE;
133 }
134 return 0;
135}
136
137
138static int display_banner (void)
139{
140 printf ("\n\n%s\n\n", version_string);
141 printf ("U-Boot code: %p -> %p data: %p -> %p\n",
142 _text, _etext, _data, _end);
143 return 0;
144}
145
146void hang(void)
147{
148 for (;;) ;
149}
150
151static int display_dram_config (void)
152{
153 int i;
154
155 puts ("DRAM Configuration:\n");
156
157 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
158 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
159 print_size (gd->bd->bi_dram[i].size, "\n");
160 }
161
162 return 0;
163}
164
165static void display_flash_config (void)
166{
167 puts ("Flash: ");
168 print_size(gd->bd->bi_flashsize, " ");
169 printf("at address 0x%08lx\n", gd->bd->bi_flashstart);
170}
171
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100172void board_init_f(ulong board_type)
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200173{
174 gd_t gd_data;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100175 gd_t *new_gd;
176 bd_t *bd;
177 unsigned long *new_sp;
178 unsigned long monitor_len;
179 unsigned long monitor_addr;
180 unsigned long addr;
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100181 long sdram_size;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200182
183 /* Initialize the global data pointer */
184 memset(&gd_data, 0, sizeof(gd_data));
185 gd = &gd_data;
186
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200187 /* Perform initialization sequence */
Haavard Skinnemoendf548d32006-11-19 18:06:53 +0100188 board_early_init_f();
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200189 cpu_init();
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200190 env_init();
191 init_baudrate();
192 serial_init();
193 console_init_f();
194 display_banner();
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100195 sdram_size = initdram(board_type);
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200196
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100197 /* If we have no SDRAM, we can't go on */
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100198 if (sdram_size <= 0)
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100199 panic("No working SDRAM available\n");
200
201 /*
202 * Now that we have DRAM mapped and working, we can
203 * relocate the code and continue running from DRAM.
204 *
205 * Reserve memory at end of RAM for (top down in that order):
206 * - u-boot image
207 * - heap for malloc()
208 * - board info struct
209 * - global data struct
210 * - stack
211 */
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100212 addr = CFG_SDRAM_BASE + sdram_size;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100213 monitor_len = _end - _text;
214
215 /*
216 * Reserve memory for u-boot code, data and bss.
217 * Round down to next 4 kB limit.
218 */
219 addr -= monitor_len;
220 addr &= ~(4096UL - 1);
221 monitor_addr = addr;
222
223 /* Reserve memory for malloc() */
224 addr -= CFG_MALLOC_LEN;
225
Haavard Skinnemoend5acb952006-12-17 15:39:15 +0100226#ifdef CFG_DMA_ALLOC_LEN
227 /* Reserve DMA memory (must be cache aligned) */
228 addr &= ~(CFG_DCACHE_LINESZ - 1);
229 addr -= CFG_DMA_ALLOC_LEN;
230#endif
231
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100232 /* Allocate a Board Info struct on a word boundary */
233 addr -= sizeof(bd_t);
234 addr &= ~3UL;
235 gd->bd = bd = (bd_t *)addr;
236
237 /* Allocate a new global data copy on a 8-byte boundary. */
238 addr -= sizeof(gd_t);
239 addr &= ~7UL;
240 new_gd = (gd_t *)addr;
241
242 /* And finally, a new, bigger stack. */
243 new_sp = (unsigned long *)addr;
244 gd->stack_end = addr;
245 *(--new_sp) = 0;
246 *(--new_sp) = 0;
247
248 /*
249 * Initialize the board information struct with the
250 * information we have.
251 */
252 bd->bi_dram[0].start = CFG_SDRAM_BASE;
Haavard Skinnemoen12f099c2006-12-17 14:46:06 +0100253 bd->bi_dram[0].size = sdram_size;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100254 bd->bi_baudrate = gd->baudrate;
255
256 memcpy(new_gd, gd, sizeof(gd_t));
257
258 relocate_code((unsigned long)new_sp, new_gd, monitor_addr);
Haavard Skinnemoenc841bee2006-11-18 17:15:30 +0100259}
260
261void board_init_r(gd_t *new_gd, ulong dest_addr)
262{
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100263 extern void malloc_bin_reloc (void);
264#ifndef CFG_ENV_IS_NOWHERE
265 extern char * env_name_spec;
266#endif
267 cmd_tbl_t *cmdtp;
268 bd_t *bd;
269
Haavard Skinnemoenc841bee2006-11-18 17:15:30 +0100270 gd = new_gd;
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100271 bd = gd->bd;
272
273 gd->flags |= GD_FLG_RELOC;
274 gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
Haavard Skinnemoenc841bee2006-11-18 17:15:30 +0100275
276 monitor_flash_len = _edata - _text;
277
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100278 /*
279 * We have to relocate the command table manually
280 */
281 for (cmdtp = &__u_boot_cmd_start;
282 cmdtp != &__u_boot_cmd_end; cmdtp++) {
283 unsigned long addr;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200284
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100285 addr = (unsigned long)cmdtp->cmd + gd->reloc_off;
286 cmdtp->cmd = (typeof(cmdtp->cmd))addr;
287
288 addr = (unsigned long)cmdtp->name + gd->reloc_off;
289 cmdtp->name = (typeof(cmdtp->name))addr;
290
291 if (cmdtp->usage) {
292 addr = (unsigned long)cmdtp->usage + gd->reloc_off;
293 cmdtp->usage = (typeof(cmdtp->usage))addr;
294 }
295#ifdef CFG_LONGHELP
296 if (cmdtp->help) {
297 addr = (unsigned long)cmdtp->help + gd->reloc_off;
298 cmdtp->help = (typeof(cmdtp->help))addr;
299 }
300#endif
301 }
302
303 /* there are some other pointer constants we must deal with */
304#ifndef CFG_ENV_IS_NOWHERE
305 env_name_spec += gd->reloc_off;
306#endif
307
308 timer_init();
309 mem_malloc_init();
310 malloc_bin_reloc();
Haavard Skinnemoend5acb952006-12-17 15:39:15 +0100311 dma_alloc_init();
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200312 board_init_info();
313 flash_init();
314
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100315 if (bd->bi_flashsize)
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200316 display_flash_config();
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +0100317 if (bd->bi_dram[0].size)
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200318 display_dram_config();
319
320 gd->bd->bi_boot_params = malloc(CFG_BOOTPARAMS_LEN);
321 if (!gd->bd->bi_boot_params)
322 puts("WARNING: Cannot allocate space for boot parameters\n");
323
324 /* initialize environment */
325 env_relocate();
326
327 devices_init();
328 jumptable_init();
329 console_init_r();
330
331 for (;;) {
332 main_loop();
333 }
334}