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
|
/*
* linux/arch/m68k/sun3/config.c
*
* Copyright (C) 1996,1997 Pekka Pietik{inen
*
* 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.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/seq_file.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/memblock.h>
#include <linux/platform_device.h>
#include <asm/oplib.h>
#include <asm/setup.h>
#include <asm/contregs.h>
#include <asm/movs.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/sun3-head.h>
#include <asm/sun3mmu.h>
#include <asm/machdep.h>
#include <asm/machines.h>
#include <asm/idprom.h>
#include <asm/intersil.h>
#include <asm/irq.h>
#include <asm/sections.h>
#include <asm/segment.h>
#include <asm/sun3ints.h>
char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
static void sun3_sched_init(irq_handler_t handler);
extern void sun3_get_model (char* model);
extern int sun3_hwclk(int set, struct rtc_time *t);
volatile char* clock_va;
extern unsigned long availmem;
unsigned long num_pages;
static void sun3_get_hardware_list(struct seq_file *m)
{
seq_printf(m, "PROM Revision:\t%s\n", romvec->pv_monid);
}
void __init sun3_init(void)
{
unsigned char enable_register;
int i;
m68k_machtype= MACH_SUN3;
m68k_cputype = CPU_68020;
m68k_fputype = FPU_68881; /* mc68881 actually */
m68k_mmutype = MMU_SUN3;
clock_va = (char *) 0xfe06000; /* dark */
sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */
sun3_disable_interrupts();
prom_init((void *)LINUX_OPPROM_BEGVM);
GET_CONTROL_BYTE(AC_SENABLE,enable_register);
enable_register |= 0x50; /* Enable FPU */
SET_CONTROL_BYTE(AC_SENABLE,enable_register);
GET_CONTROL_BYTE(AC_SENABLE,enable_register);
/* This code looks suspicious, because it doesn't subtract
memory belonging to the kernel from the available space */
memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg));
/* Reserve important PMEGS */
/* FIXME: These should be probed instead of hardcoded */
for (i=0; i<8; i++) /* Kernel PMEGs */
sun3_reserved_pmeg[i] = 1;
sun3_reserved_pmeg[247] = 1; /* ROM mapping */
sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */
sun3_reserved_pmeg[251] = 1; /* VB area */
sun3_reserved_pmeg[254] = 1; /* main I/O */
sun3_reserved_pmeg[249] = 1;
sun3_reserved_pmeg[252] = 1;
sun3_reserved_pmeg[253] = 1;
set_fs(KERNEL_DS);
}
/* Without this, Bad Things happen when something calls arch_reset. */
static void sun3_reboot (void)
{
prom_reboot ("vmlinux");
}
static void sun3_halt (void)
{
prom_halt ();
}
/* sun3 bootmem allocation */
static void __init sun3_bootmem_alloc(unsigned long memory_start,
unsigned long memory_end)
{
unsigned long start_page;
/* align start/end to page boundaries */
memory_start = ((memory_start + (PAGE_SIZE-1)) & PAGE_MASK);
memory_end = memory_end & PAGE_MASK;
start_page = __pa(memory_start) >> PAGE_SHIFT;
max_pfn = num_pages = __pa(memory_end) >> PAGE_SHIFT;
high_memory = (void *)memory_end;
availmem = memory_start;
m68k_setup_node(0);
}
void __init config_sun3(void)
{
unsigned long memory_start, memory_end;
pr_info("ARCH: SUN3\n");
idprom_init();
/* Subtract kernel memory from available memory */
mach_sched_init = sun3_sched_init;
mach_init_IRQ = sun3_init_IRQ;
mach_reset = sun3_reboot;
mach_get_model = sun3_get_model;
mach_hwclk = sun3_hwclk;
mach_halt = sun3_halt;
mach_get_hardware_list = sun3_get_hardware_list;
memory_start = ((((unsigned long)_end) + 0x2000) & ~0x1fff);
// PROM seems to want the last couple of physical pages. --m
memory_end = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;
m68k_num_memory=1;
m68k_memory[0].size=*(romvec->pv_sun3mem);
sun3_bootmem_alloc(memory_start, memory_end);
}
static void __init sun3_sched_init(irq_handler_t timer_routine)
{
sun3_disable_interrupts();
intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE);
intersil_clock->int_reg=INTERSIL_HZ_100_MASK;
intersil_clear();
sun3_enable_irq(5);
intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE);
sun3_enable_interrupts();
intersil_clear();
}
#if IS_ENABLED(CONFIG_SUN3_SCSI)
static const struct resource sun3_scsi_vme_rsrc[] __initconst = {
{
.flags = IORESOURCE_IRQ,
.start = SUN3_VEC_VMESCSI0,
.end = SUN3_VEC_VMESCSI0,
}, {
.flags = IORESOURCE_MEM,
.start = 0xff200000,
.end = 0xff200021,
}, {
.flags = IORESOURCE_IRQ,
.start = SUN3_VEC_VMESCSI1,
.end = SUN3_VEC_VMESCSI1,
}, {
.flags = IORESOURCE_MEM,
.start = 0xff204000,
.end = 0xff204021,
},
};
/*
* Int: level 2 autovector
* IO: type 1, base 0x00140000, 5 bits phys space: A<4..0>
*/
static const struct resource sun3_scsi_rsrc[] __initconst = {
{
.flags = IORESOURCE_IRQ,
.start = 2,
.end = 2,
}, {
.flags = IORESOURCE_MEM,
.start = 0x00140000,
.end = 0x0014001f,
},
};
int __init sun3_platform_init(void)
{
switch (idprom->id_machtype) {
case SM_SUN3 | SM_3_160:
case SM_SUN3 | SM_3_260:
platform_device_register_simple("sun3_scsi_vme", -1,
sun3_scsi_vme_rsrc, ARRAY_SIZE(sun3_scsi_vme_rsrc));
break;
case SM_SUN3 | SM_3_50:
case SM_SUN3 | SM_3_60:
platform_device_register_simple("sun3_scsi", -1,
sun3_scsi_rsrc, ARRAY_SIZE(sun3_scsi_rsrc));
break;
}
return 0;
}
arch_initcall(sun3_platform_init);
#endif
|
