blob: 7ab250e5d70539ed3ac062c4ea4467995be00a22 (
plain)
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
|
/******************************************************************************
*
* Filename: env_vars.c
*
* Instantiation of environment variables, structures, and other globals.
*
* Revision information:
*
* 20AUG2004 kb_admin initial creation
*
* BEGIN_KBDD_BLOCK
* No warranty, expressed or implied, is included with this software. It is
* provided "AS IS" and no warranty of any kind including statutory or aspects
* relating to merchantability or fitness for any purpose is provided. All
* intellectual property rights of others is maintained with the respective
* owners. This software is not copyrighted and is intended for reference
* only.
* END_BLOCK
*
* $FreeBSD$
*****************************************************************************/
#include "env_vars.h"
#include "loader_prompt.h"
#include "lib.h"
/******************************* GLOBALS *************************************/
char boot_commands[MAX_BOOT_COMMANDS][MAX_INPUT_SIZE];
char env_table[MAX_ENV_SIZE_BYTES];
extern char BootCommandSection;
/************************** PRIVATE FUNCTIONS ********************************/
static int currentIndex;
static int currentOffset;
/*
* .KB_C_FN_DEFINITION_START
* int ReadCharFromEnvironment(char *)
* This private function reads characters from the enviroment variables
* to service the command prompt during auto-boot or just to setup the
* default environment. Returns positive value if valid character was
* set in the pointer. Returns negative value to signal input stream
* terminated. Returns 0 to indicate _wait_ condition.
* .KB_C_FN_DEFINITION_END
*/
static int
ReadCharFromEnvironment(int timeout)
{
int ch;
if (currentIndex < MAX_BOOT_COMMANDS) {
ch = boot_commands[currentIndex][currentOffset++];
if (ch == '\0' || (currentOffset >= MAX_INPUT_SIZE)) {
currentOffset = 0;
++currentIndex;
ch = '\r';
}
return (ch);
}
return (-1);
}
/*************************** GLOBAL FUNCTIONS ********************************/
/*
* .KB_C_FN_DEFINITION_START
* void DumpBootCommands(void)
* This global function displays the current boot commands.
* .KB_C_FN_DEFINITION_END
*/
void
DumpBootCommands(void)
{
int i;
for (i = 0; boot_commands[i][0]; i++)
printf("0x%x : %s[E]\n", i, boot_commands[i]);
}
/*
* .KB_C_FN_DEFINITION_START
* void LoadBootCommands(void)
* This global function loads the existing boot commands from raw format and
* coverts it to the standard, command-index format. Notice, the processed
* boot command table has much more space allocated than the actual table
* stored in non-volatile memory. This is because the processed table
* exists in RAM which is larger than the non-volatile space.
* .KB_C_FN_DEFINITION_END
*/
void
LoadBootCommands(void)
{
int index, j;
char *cptr;
p_memset((char*)boot_commands, 0, sizeof(boot_commands));
cptr = &BootCommandSection;
for (index = 0; *cptr; index++) {
for (j = 0; *cptr; j++)
boot_commands[index][j] = *cptr++;
cptr++;
}
}
/*
* .KB_C_FN_DEFINITION_START
* void ExecuteEnvironmentFunctions(void)
* This global function executes applicable entries in the environment.
* .KB_C_FN_DEFINITION_END
*/
void
ExecuteEnvironmentFunctions(void)
{
currentIndex = 0;
currentOffset = 0;
DumpBootCommands();
printf("Autoboot...\n");
Bootloader(ReadCharFromEnvironment);
}
|
