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