This source file includes following definitions.
- probe_memory
- map_the_prom
- do_page_fault
1 #include <linux/string.h>
2 #include <linux/types.h>
3 #include <linux/ptrace.h>
4 #include <linux/mman.h>
5 #include <linux/signal.h>
6 #include <linux/mm.h>
7
8 #include <asm/system.h>
9 #include <asm/segment.h>
10 #include <asm/openprom.h>
11 #include <asm/page.h>
12
13 extern unsigned long pg0[1024];
14 extern void die_if_kernel(char *,struct pt_regs *,long);
15
16
17
18
19 extern unsigned int trapbase[];
20 extern unsigned int end[], etext[], msgbuf[];
21 struct linux_romvec *romvec;
22
23
24
25 int tbase_needs_unmapping;
26
27
28
29
30
31 int num_segmaps, num_contexts;
32 int invalid_segment;
33
34
35
36 int vac_size, vac_linesize, vac_do_hw_vac_flushes;
37 int vac_entries_per_context, vac_entries_per_segment;
38 int vac_entries_per_page;
39
40
41
42
43
44
45 #undef CONFIG_TEST_VERIFY_AREA
46
47
48
49
50
51 unsigned long
52 probe_memory(void)
53 {
54 register struct linux_romvec *lprom;
55 register struct linux_mlist_v0 *mlist;
56 register unsigned long bytes, base_paddr;
57 register int i;
58
59 bytes = 0;
60 base_paddr = 0;
61 lprom = romvec;
62 switch(lprom->pv_romvers)
63 {
64 case 0:
65 mlist=(*(lprom->pv_v0mem.v0_totphys));
66 bytes=mlist->num_bytes;
67 base_paddr = (unsigned long) mlist->start_adr;
68 printk("Bank 1: starting at 0x%x holding %d bytes\n",
69 (unsigned int) base_paddr, (int) bytes);
70 i=1;
71 if(mlist->theres_more != (void *)0)
72 {
73 i++;
74 mlist=mlist->theres_more;
75 bytes+=mlist->num_bytes;
76 printk("Bank %d: starting at 0x%x holding %d bytes\n", i,
77 (unsigned int) mlist->start_adr, (int) mlist->num_bytes);
78 }
79 break;
80 case 2:
81 printk("no v2 memory probe support yet.\n");
82 (*(lprom->pv_halt))();
83 break;
84 }
85 printk("Physical memory: %d bytes starting at va 0x%x\n",
86 (unsigned int) bytes, (int) base_paddr);
87
88 return bytes;
89 }
90
91
92
93
94
95
96 int
97 map_the_prom(int curr_num_segs)
98 {
99 register unsigned long prom_va_begin;
100 register unsigned long prom_va_end;
101 register int segmap_entry, i;
102
103 prom_va_begin = LINUX_OPPROM_BEGVM;
104 prom_va_end = LINUX_OPPROM_ENDVM;
105
106 #ifdef DEBUG_MAP_PROM
107 printk("\ncurr_num_segs = 0x%x\n", curr_num_segs);
108 #endif
109
110 while( prom_va_begin < prom_va_end)
111 {
112 segmap_entry=get_segmap(prom_va_begin);
113
114 curr_num_segs = ((segmap_entry<curr_num_segs)
115 ? segmap_entry : curr_num_segs);
116
117 for(i = num_contexts; --i > 0;)
118 (*romvec->pv_setctxt)(i, (char *) prom_va_begin,
119 segmap_entry);
120
121 if(segmap_entry == invalid_segment)
122 {
123
124 #ifdef DEBUG_MAP_PROM
125 printk("invalid_segments, virt_addr 0x%x\n", prom_va_begin);
126 #endif
127
128 prom_va_begin += 0x40000;
129 continue;
130 }
131
132
133
134
135
136 #ifdef DEBUG_MAP_PROM
137 printk("making segmap for prom privileged, va = 0x%x\n",
138 prom_va_begin);
139 #endif
140
141 for(i = 0x40; --i >= 0; prom_va_begin+=4096)
142 {
143 put_pte(prom_va_begin, get_pte(prom_va_begin) | 0x20000000);
144 }
145
146 }
147
148 printk("Mapped the PROM in all contexts...\n");
149
150 #ifdef DEBUG_MAP_PROM
151 printk("curr_num_segs = 0x%x\n", curr_num_segs);
152 #endif
153
154 return curr_num_segs;
155
156 }
157
158
159
160
161
162
163 asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code)
164 {
165 die_if_kernel("Oops", regs, error_code);
166 do_exit(SIGKILL);
167 }
168
169
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171