1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/*****************************************************************************
*!
*! FILE NAME : common_init.c
*!
*! DESCRIPTION: This piece of code is loaded at bootstrap and is put in the
*! cache at 0x380000F0. Depending of how R_BUS_STATUS<2:1> is
*! set different kinds of bootstrap is performed.
*!
*! 00 - Normal boot. No bootstrap is performed and this code
*! is never loaded.
*! 01 - Serial boot. 784 bytes is loaded and execution starts
*! at 0x380000F0.
*! 11 - Parallel boot. 784 bytes is loaded and execution starts
*! at 0x380000F0.
*! 10 - Network boot. 1484 bytes is loaded and execution start
*! at 0x380000F4.
*!
*! ---------------------------------------------------------------------------
*! HISTORY
*!
*! DATE NAME CHANGES
*! ---- ---- -------
*! 980326 Ronny Ranerup Initial version
*! Sep 20 1999 Jonas Dellenvall Added port3 debug support
*! 20020206 ronny Yeah, and I removed it again...
*!
*! ---------------------------------------------------------------------------
*! (C) Copyright 1998-2002, Axis Communications AB, LUND, SWEDEN
*!***************************************************************************/
/*
Misc notes:
It is very important to keep this file short. This and the boot
interface specific parts must fit into the first boot packet.
*/
/****************** INCLUDE FILES SECTION ***********************************/
#include "hwregs.h"
#include "e100boot.h"
/****************** CONSTANT AND MACRO SECTION ******************************/
/****************** TYPE DEFINITION SECTION *********************************/
/****************** LOCAL FUNCTION DECLARATION SECTION **********************/
static int timeout(void);
/****************** GLOBAL VARIABLE DECLARATION SECTION *********************/
udword nbr_read; /* How many bytes has been read from current file */
byte interface; /* Which I/O interface is the current one */
byte set_dest; /* Have we set the destination address in tx_header */
udword last_timeout;
struct packet_header_T tx_header;
dma_descr_T tx_descr; /* For packet header */
dma_descr_T tx_descr2; /* packet data */
struct packet_header_T rx_header;
dma_descr_T rx_descr; /* For packet header */
dma_descr_T rx_descr2; /* packet data */
udword seq; /* Sequence number of next wanted packet */
byte serial_up;
/****************** LOCAL VARIABLE DECLARATION SECTION **********************/
/****************** FUNCTION DEFINITION SECTION *****************************/
void
crt1(void)
{
/* Do this only once so we don't reset the timers and destroy the 32
bit timer-register used as random number generator */
REG_SET__R_TIMER_CTRL(
timerdiv1, 0,
timerdiv0, 0,
presc_timer1, normal,
i1, clr,
tm1, run,
clksel1, cascade0,
presc_ext, prescale,
i0, clr,
tm0, run,
clksel0, c9600Hz);
REG_SET__R_TIMER_CTRL(
timerdiv1, 0,
timerdiv0, 0,
presc_timer1, normal,
i1, nop,
tm1, run,
clksel1, cascade0,
presc_ext, prescale,
i0, nop,
tm0, run,
clksel0, c9600Hz);
start();
}
void
start(void)
{
#if USE_LEDS
REG_SET__R_PORT_PA_DIR(
dir7, output,
dir6, output,
dir5, output,
dir4, output,
dir3, output,
dir2, output,
dir1, output,
dir0, input); /* not for prodtest */
REG_SET__R_PORT_PA_DATA(data_out, 0);
REG_SET__R_PORT_PB_DIR(
dir7, output,
dir6, output,
dir5, output,
dir4, output,
dir3, output,
dir2, output,
dir1, output,
dir0, output);
REG_SET__R_PORT_PB_DATA(data_out, 0xff);
#endif
/* We must initialize all (global) variables here, since the .data
and .bss area are used before they are loaded. */
//serial_up = FALSE;
nbr_read = 0;
/* Get a random value to use as id. */
tx_header.id = htonl(REG_RD(R_TIMER_DATA));
/* timer01 is used as timer. */
last_timeout = REG_GET(R_TIMER01_DATA, count);
interface = REG_GET(R_BUS_STATUS, boot) - 1; /* 0,1,2 */
rx_descr2.status = 0;
/* Initialize the boot interface */
init_interface();
send_ack(); /* Ack the first bootpacket, i.e. this code. seq 0. */
while (1) {
if (read_data()) {
if (nbr_read >= (udword)bytes_to_read) {
break;
}
else if (interface == NETWORK) {
REG_SET(R_DMA_CH1_CMD, cmd, start);
}
}
}
#if USE_LEDS
REG_SET(R_PORT_PA_DATA, data_out, 0x55);
#endif
level2_boot();
}
int
read_data(void)
{
if (handle_read()) {
return TRUE;
}
if (timeout()) {
send_ack();
}
return FALSE;
}
int
timeout(void)
{
volatile int now = REG_GET(R_TIMER01_DATA, count);
int elapsed;
int wait_time = 9600;
elapsed = last_timeout - now;
if (elapsed < 0) {
elapsed = -elapsed;
}
if (elapsed > wait_time) {
last_timeout = now;
return TRUE;
}
return FALSE;
}
/****************** END OF FILE common_init.c *******************************/
|
