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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/* $Id: setup.c,v 1.17 1999/08/20 21:59:02 ralf Exp $
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995 Linus Torvalds
* Copyright (C) 1995, 1996, 1997, 1998 Ralf Baechle
* Copyright (C) 1996 Stoned Elipot
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/hdreg.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/malloc.h>
#include <linux/user.h>
#include <linux/utsname.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#ifdef CONFIG_BLK_DEV_RAM
#include <linux/blk.h>
#endif
#include <linux/ide.h>
#ifdef CONFIG_RTC
#include <linux/ioport.h>
#include <linux/timex.h>
#endif
#include <asm/asm.h>
#include <asm/bootinfo.h>
#include <asm/cachectl.h>
#include <asm/io.h>
#include <asm/stackframe.h>
#include <asm/system.h>
#ifdef CONFIG_SGI_IP22
#include <asm/sgialib.h>
#endif
struct mips_cpuinfo boot_cpu_data = { NULL, NULL, 0 };
/*
* Not all of the MIPS CPUs have the "wait" instruction available. This
* is set to true if it is available. The wait instruction stops the
* pipeline and reduces the power consumption of the CPU very much.
*/
char wait_available;
/*
* Do we have a cyclecounter available?
*/
char cyclecounter_available;
/*
* There are several bus types available for MIPS machines. "RISC PC"
* type machines have ISA, EISA, VLB or PCI available, DECstations
* have Turbochannel or Q-Bus, SGI has GIO, there are lots of VME
* boxes ...
* This flag is set if a EISA slots are available.
*/
int EISA_bus = 0;
/*
* Milo passes some information to the kernel that looks like as if it
* had been returned by a Intel PC BIOS. Milo doesn't fill the passed
* drive_info and Linux can find out about this anyway, so I'm going to
* remove this sometime. screen_info contains information about the
* resolution of the text screen. For VGA graphics based machine this
* information is being use to continue the screen output just below
* the BIOS printed text and with the same text resolution.
*/
struct screen_info screen_info;
#ifdef CONFIG_BLK_DEV_FD
extern struct fd_ops no_fd_ops;
struct fd_ops *fd_ops;
#endif
#ifdef CONFIG_BLK_DEV_IDE
extern struct ide_ops no_ide_ops;
struct ide_ops *ide_ops;
#endif
extern struct rtc_ops no_rtc_ops;
struct rtc_ops *rtc_ops;
extern struct kbd_ops no_kbd_ops;
struct kbd_ops *kbd_ops;
/*
* Setup information
*
* These are initialized so they are in the .data section
*/
unsigned long mips_memory_upper = KSEG0; /* this is set by kernel_entry() */
unsigned long mips_cputype = CPU_UNKNOWN;
unsigned long mips_machtype = MACH_UNKNOWN;
unsigned long mips_machgroup = MACH_GROUP_UNKNOWN;
unsigned char aux_device_present;
extern int _end;
extern char empty_zero_page[PAGE_SIZE];
/*
* This is set up by the setup-routine at boot-time
*/
#define PARAM empty_zero_page
static char command_line[CL_SIZE] = { 0, };
char saved_command_line[CL_SIZE];
extern char arcs_cmdline[CL_SIZE];
/*
* The board specific setup routine sets irq_setup to point to a board
* specific setup routine.
*/
void (*irq_setup)(void);
/*
* mips_io_port_base is the begin of the address space to which x86 style
* I/O ports are mapped.
*/
unsigned long mips_io_port_base;
/*
* isa_slot_offset is the address where E(ISA) busaddress 0 is is mapped
* for the processor.
*/
unsigned long isa_slot_offset;
__initfunc(static void default_irq_setup(void))
{
panic("Unknown machtype in init_IRQ");
}
__initfunc(void setup_arch(char **cmdline_p,
unsigned long * memory_start_p, unsigned long * memory_end_p))
{
unsigned long memory_end;
#ifdef CONFIG_BLK_DEV_INITRD
unsigned long tmp;
unsigned long *initrd_header;
#endif
void baget_setup(void);
void cobalt_setup(void);
void decstation_setup(void);
void deskstation_setup(void);
void jazz_setup(void);
void sni_rm200_pci_setup(void);
void sgi_setup(void);
/* Save defaults for configuration-dependent routines. */
irq_setup = default_irq_setup;
#ifdef CONFIG_BLK_DEV_FD
fd_ops = &no_fd_ops;
#endif
#ifdef CONFIG_BLK_DEV_IDE
ide_ops = &no_ide_ops;
#endif
rtc_ops = &no_rtc_ops;
kbd_ops = &no_kbd_ops;
switch(mips_machgroup)
{
#ifdef CONFIG_BAGET_MIPS
case MACH_GROUP_UNKNOWN:
baget_setup();
break;
#endif
#ifdef CONFIG_COBALT_MICRO_SERVER
case MACH_GROUP_COBALT:
cobalt_setup();
break;
#endif
#ifdef CONFIG_DECSTATION
case MACH_GROUP_DEC:
decstation_setup();
break;
#endif
#ifdef CONFIG_MIPS_JAZZ
case MACH_GROUP_JAZZ:
jazz_setup();
break;
#endif
#ifdef CONFIG_SGI_IP22
/* As of now this is only IP22. */
case MACH_GROUP_SGI:
sgi_setup();
break;
#endif
#ifdef CONFIG_SNI_RM200_PCI
case MACH_GROUP_SNI_RM:
sni_rm200_pci_setup();
break;
#endif
default:
panic("Unsupported architecture");
}
memory_end = mips_memory_upper;
/*
* Due to prefetching and similar mechanism the CPU sometimes
* generates addresses beyond the end of memory. We leave the size
* of one cache line at the end of memory unused to make shure we
* don't catch this type of bus errors.
*/
memory_end -= 128;
memory_end &= PAGE_MASK;
strncpy (command_line, arcs_cmdline, CL_SIZE);
memcpy(saved_command_line, command_line, CL_SIZE);
saved_command_line[CL_SIZE-1] = '\0';
*cmdline_p = command_line;
*memory_start_p = (unsigned long) &_end;
*memory_end_p = memory_end;
#ifdef CONFIG_BLK_DEV_INITRD
tmp = (((unsigned long)&_end + PAGE_SIZE-1) & PAGE_MASK) - 8;
if (tmp < (unsigned long)&_end)
tmp += PAGE_SIZE;
initrd_header = (unsigned long *)tmp;
if (initrd_header[0] == 0x494E5244) {
initrd_start = (unsigned long)&initrd_header[2];
initrd_end = initrd_start + initrd_header[1];
initrd_below_start_ok = 1;
if (initrd_end > memory_end) {
printk("initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
initrd_end,memory_end);
initrd_start = 0;
} else
*memory_start_p = initrd_end;
}
#endif
}
|
