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4a551709 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> | |
a3ad8e26 | 30 | #include <net.h> |
c935d3bd WD |
31 | #ifdef CONFIG_STATUS_LED |
32 | #include <status_led.h> | |
33 | #endif | |
4a551709 | 34 | |
d87080b7 | 35 | DECLARE_GLOBAL_DATA_PTR; |
4a551709 WD |
36 | |
37 | /* | |
38 | * All attempts to come up with a "common" initialization sequence | |
39 | * that works for all boards and architectures failed: some of the | |
40 | * requirements are just _too_ different. To get rid of the resulting | |
41 | * mess of board dependend #ifdef'ed code we now make the whole | |
42 | * initialization sequence configurable to the user. | |
43 | * | |
44 | * The requirements for any new initalization function is simple: it | |
45 | * receives a pointer to the "global data" structure as it's only | |
46 | * argument, and returns an integer return code, where 0 means | |
47 | * "continue" and != 0 means "fatal error, hang the system". | |
48 | */ | |
49 | ||
50 | ||
51 | extern void malloc_bin_reloc (void); | |
52 | typedef int (init_fnc_t) (void); | |
4a551709 WD |
53 | |
54 | /* | |
55 | * Begin and End of memory area for malloc(), and current "brk" | |
56 | */ | |
57 | static ulong mem_malloc_start = 0; | |
58 | static ulong mem_malloc_end = 0; | |
59 | static ulong mem_malloc_brk = 0; | |
60 | ||
61 | /* | |
62 | * The Malloc area is immediately below the monitor copy in RAM | |
63 | */ | |
64 | static void mem_malloc_init (void) | |
65 | { | |
66 | mem_malloc_start = CFG_MALLOC_BASE; | |
67 | mem_malloc_end = mem_malloc_start + CFG_MALLOC_LEN; | |
68 | mem_malloc_brk = mem_malloc_start; | |
69 | memset ((void *) mem_malloc_start, | |
70 | 0, | |
71 | mem_malloc_end - mem_malloc_start); | |
72 | } | |
73 | ||
74 | void *sbrk (ptrdiff_t increment) | |
75 | { | |
76 | ulong old = mem_malloc_brk; | |
77 | ulong new = old + increment; | |
78 | ||
79 | if ((new < mem_malloc_start) || (new > mem_malloc_end)) { | |
80 | return (NULL); | |
81 | } | |
82 | mem_malloc_brk = new; | |
83 | return ((void *) old); | |
84 | } | |
85 | ||
86 | ||
87 | /************************************************************************ | |
88 | * Initialization sequence * | |
89 | ***********************************************************************/ | |
90 | ||
91 | init_fnc_t *init_sequence[] = { | |
92 | ||
c837dcb1 WD |
93 | #if defined(CONFIG_BOARD_EARLY_INIT_F) |
94 | board_early_init_f, /* Call board-specific init code early.*/ | |
4a551709 WD |
95 | #endif |
96 | ||
97 | env_init, | |
98 | serial_init, | |
99 | console_init_f, | |
100 | display_options, | |
101 | checkcpu, | |
102 | checkboard, | |
103 | NULL, /* Terminate this list */ | |
104 | }; | |
105 | ||
106 | ||
107 | /***********************************************************************/ | |
108 | void board_init (void) | |
109 | { | |
4a551709 WD |
110 | bd_t *bd; |
111 | init_fnc_t **init_fnc_ptr; | |
a3ad8e26 WD |
112 | char *s, *e; |
113 | int i; | |
4a551709 WD |
114 | |
115 | /* Pointer is writable since we allocated a register for it. | |
116 | * Nios treats CFG_GBL_DATA_OFFSET as an address. | |
117 | */ | |
118 | gd = (gd_t *)CFG_GBL_DATA_OFFSET; | |
93f6a677 WD |
119 | /* compiler optimization barrier needed for GCC >= 3.4 */ |
120 | __asm__ __volatile__("": : :"memory"); | |
121 | ||
4a551709 WD |
122 | memset( gd, 0, CFG_GBL_DATA_SIZE ); |
123 | ||
4a551709 WD |
124 | gd->bd = (bd_t *)(gd+1); /* At end of global data */ |
125 | gd->baudrate = CONFIG_BAUDRATE; | |
126 | gd->cpu_clk = CONFIG_SYS_CLK_FREQ; | |
127 | ||
128 | bd = gd->bd; | |
129 | bd->bi_memstart = CFG_SDRAM_BASE; | |
130 | bd->bi_memsize = CFG_SDRAM_SIZE; | |
131 | bd->bi_flashstart = CFG_FLASH_BASE; | |
ec4c544b | 132 | #if defined(CFG_SRAM_BASE) && defined(CFG_SRAM_SIZE) |
4a551709 WD |
133 | bd->bi_sramstart= CFG_SRAM_BASE; |
134 | bd->bi_sramsize = CFG_SRAM_SIZE; | |
ec4c544b | 135 | #endif |
4a551709 WD |
136 | bd->bi_baudrate = CONFIG_BAUDRATE; |
137 | ||
138 | for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { | |
028ab6b5 | 139 | WATCHDOG_RESET (); |
4a551709 WD |
140 | if ((*init_fnc_ptr) () != 0) { |
141 | hang (); | |
142 | } | |
143 | } | |
144 | ||
028ab6b5 | 145 | WATCHDOG_RESET (); |
4a551709 WD |
146 | bd->bi_flashsize = flash_init(); |
147 | ||
028ab6b5 | 148 | WATCHDOG_RESET (); |
4a551709 WD |
149 | mem_malloc_init(); |
150 | malloc_bin_reloc(); | |
151 | env_relocate(); | |
152 | ||
a0f2fe52 WD |
153 | bd->bi_ip_addr = getenv_IPaddr ("ipaddr"); |
154 | s = getenv ("ethaddr"); | |
155 | for (i = 0; i < 6; ++i) { | |
156 | bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0; | |
157 | if (s) s = (*e) ? e + 1 : e; | |
158 | } | |
159 | ||
028ab6b5 | 160 | WATCHDOG_RESET (); |
4a551709 WD |
161 | devices_init(); |
162 | jumptable_init(); | |
163 | console_init_r(); | |
164 | /* | |
165 | */ | |
166 | ||
028ab6b5 | 167 | WATCHDOG_RESET (); |
4a551709 | 168 | interrupt_init (); |
c935d3bd WD |
169 | |
170 | #ifdef CONFIG_STATUS_LED | |
171 | status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING); | |
172 | #endif | |
173 | ||
4a551709 WD |
174 | /* main_loop */ |
175 | for (;;) { | |
176 | WATCHDOG_RESET (); | |
177 | main_loop (); | |
178 | } | |
179 | } | |
180 | ||
181 | ||
182 | /***********************************************************************/ | |
183 | ||
184 | void hang (void) | |
185 | { | |
c935d3bd WD |
186 | #ifdef CONFIG_STATUS_LED |
187 | status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF); | |
188 | status_led_set(STATUS_LED_RED, STATUS_LED_BLINKING); | |
189 | #endif | |
4a551709 WD |
190 | puts("### ERROR ### Please reset board ###\n"); |
191 | for (;;); | |
192 | } | |
a4986459 MF |
193 | |
194 | unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[]) | |
195 | { | |
196 | /* | |
197 | * x86 does not use a dedicated register to pass the pointer | |
198 | * to the global_data | |
199 | */ | |
200 | argv[-1] = (char *)gd; | |
201 | return entry (argc, argv); | |
202 | } |