]>
Commit | Line | Data |
---|---|---|
5c952cf0 WD |
1 | /* |
2 | * (C) Copyright 2003, Psyent Corporation <www.psyent.com> | |
3 | * Scott McNutt <smcnutt@psyent.com> | |
4 | * | |
5 | * (C) Copyright 2000-2002 | |
6 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
7 | * | |
8 | * See file CREDITS for list of people who contributed to this | |
9 | * project. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; either version 2 of | |
14 | * the License, or (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
24 | * MA 02111-1307 USA | |
25 | */ | |
26 | ||
27 | #include <common.h> | |
28 | #include <devices.h> | |
29 | #include <watchdog.h> | |
30 | #include <net.h> | |
31 | #ifdef CONFIG_STATUS_LED | |
32 | #include <status_led.h> | |
33 | #endif | |
6d0f6bcf | 34 | #if defined(CONFIG_SYS_NIOS_EPCSBASE) |
1f6ce8f5 SM |
35 | #include <nios2-epcs.h> |
36 | #endif | |
5c952cf0 | 37 | |
d87080b7 | 38 | DECLARE_GLOBAL_DATA_PTR; |
5c952cf0 WD |
39 | |
40 | /* | |
41 | * All attempts to come up with a "common" initialization sequence | |
42 | * that works for all boards and architectures failed: some of the | |
43 | * requirements are just _too_ different. To get rid of the resulting | |
44 | * mess of board dependend #ifdef'ed code we now make the whole | |
45 | * initialization sequence configurable to the user. | |
46 | * | |
47 | * The requirements for any new initalization function is simple: it | |
48 | * receives a pointer to the "global data" structure as it's only | |
49 | * argument, and returns an integer return code, where 0 means | |
50 | * "continue" and != 0 means "fatal error, hang the system". | |
51 | */ | |
52 | ||
53 | ||
54 | extern void malloc_bin_reloc (void); | |
55 | typedef int (init_fnc_t) (void); | |
56 | ||
57 | /* | |
58 | * Begin and End of memory area for malloc(), and current "brk" | |
59 | */ | |
60 | static ulong mem_malloc_start = 0; | |
61 | static ulong mem_malloc_end = 0; | |
62 | static ulong mem_malloc_brk = 0; | |
63 | ||
64 | /* | |
65 | * The Malloc area is immediately below the monitor copy in RAM | |
66 | */ | |
67 | static void mem_malloc_init (void) | |
68 | { | |
6d0f6bcf JCPV |
69 | mem_malloc_start = CONFIG_SYS_MALLOC_BASE; |
70 | mem_malloc_end = mem_malloc_start + CONFIG_SYS_MALLOC_LEN; | |
5c952cf0 WD |
71 | mem_malloc_brk = mem_malloc_start; |
72 | memset ((void *) mem_malloc_start, | |
73 | 0, | |
74 | mem_malloc_end - mem_malloc_start); | |
75 | } | |
76 | ||
77 | void *sbrk (ptrdiff_t increment) | |
78 | { | |
79 | ulong old = mem_malloc_brk; | |
80 | ulong new = old + increment; | |
81 | ||
82 | if ((new < mem_malloc_start) || (new > mem_malloc_end)) { | |
83 | return (NULL); | |
84 | } | |
85 | mem_malloc_brk = new; | |
86 | return ((void *) old); | |
87 | } | |
88 | ||
89 | ||
90 | /************************************************************************ | |
91 | * Initialization sequence * | |
92 | ***********************************************************************/ | |
93 | ||
94 | init_fnc_t *init_sequence[] = { | |
95 | ||
96 | #if defined(CONFIG_BOARD_EARLY_INIT_F) | |
97 | board_early_init_f, /* Call board-specific init code early.*/ | |
98 | #endif | |
6d0f6bcf | 99 | #if defined(CONFIG_SYS_NIOS_EPCSBASE) |
1f6ce8f5 SM |
100 | epcs_reset, |
101 | #endif | |
5c952cf0 WD |
102 | |
103 | env_init, | |
104 | serial_init, | |
105 | console_init_f, | |
106 | display_options, | |
107 | checkcpu, | |
108 | checkboard, | |
109 | NULL, /* Terminate this list */ | |
110 | }; | |
111 | ||
112 | ||
113 | /***********************************************************************/ | |
114 | void board_init (void) | |
115 | { | |
5c952cf0 WD |
116 | bd_t *bd; |
117 | init_fnc_t **init_fnc_ptr; | |
118 | char *s, *e; | |
119 | int i; | |
120 | ||
121 | /* Pointer is writable since we allocated a register for it. | |
6d0f6bcf | 122 | * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address. |
5c952cf0 | 123 | */ |
6d0f6bcf | 124 | gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET; |
5c952cf0 WD |
125 | /* compiler optimization barrier needed for GCC >= 3.4 */ |
126 | __asm__ __volatile__("": : :"memory"); | |
127 | ||
6d0f6bcf | 128 | memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE ); |
5c952cf0 WD |
129 | |
130 | gd->bd = (bd_t *)(gd+1); /* At end of global data */ | |
131 | gd->baudrate = CONFIG_BAUDRATE; | |
132 | gd->cpu_clk = CONFIG_SYS_CLK_FREQ; | |
133 | ||
134 | bd = gd->bd; | |
6d0f6bcf JCPV |
135 | bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; |
136 | bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE; | |
137 | bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; | |
138 | #if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE) | |
139 | bd->bi_sramstart= CONFIG_SYS_SRAM_BASE; | |
140 | bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE; | |
5c952cf0 WD |
141 | #endif |
142 | bd->bi_baudrate = CONFIG_BAUDRATE; | |
143 | ||
144 | for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { | |
145 | WATCHDOG_RESET (); | |
146 | if ((*init_fnc_ptr) () != 0) { | |
147 | hang (); | |
148 | } | |
149 | } | |
150 | ||
151 | WATCHDOG_RESET (); | |
152 | bd->bi_flashsize = flash_init(); | |
153 | ||
154 | WATCHDOG_RESET (); | |
155 | mem_malloc_init(); | |
156 | malloc_bin_reloc(); | |
157 | env_relocate(); | |
158 | ||
159 | bd->bi_ip_addr = getenv_IPaddr ("ipaddr"); | |
160 | s = getenv ("ethaddr"); | |
161 | for (i = 0; i < 6; ++i) { | |
162 | bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0; | |
163 | if (s) s = (*e) ? e + 1 : e; | |
164 | } | |
165 | ||
166 | WATCHDOG_RESET (); | |
167 | devices_init(); | |
168 | jumptable_init(); | |
169 | console_init_r(); | |
170 | ||
171 | WATCHDOG_RESET (); | |
172 | interrupt_init (); | |
173 | ||
1f6ce8f5 SM |
174 | #if defined(CONFIG_BOARD_LATE_INIT) |
175 | board_late_init (); | |
176 | #endif | |
177 | ||
5c952cf0 WD |
178 | /* main_loop */ |
179 | for (;;) { | |
180 | WATCHDOG_RESET (); | |
181 | main_loop (); | |
182 | } | |
183 | } | |
184 | ||
185 | ||
186 | /***********************************************************************/ | |
187 | ||
188 | void hang (void) | |
189 | { | |
190 | disable_interrupts (); | |
191 | puts("### ERROR ### Please reset board ###\n"); | |
192 | for (;;); | |
193 | } |