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[netwatch.git] / aseg-paging / paging.c
1 #include <io.h>
2 #include <smram.h>
3 #include <video_defines.h>
4 #include <minilib.h>
5 #include <smi.h>
6 #include <pci-bother.h>
7 #include "../net/net.h"
8 #include "vga-overlay.h"
9
10 #include "pagetable.h"
11
12 unsigned int counter = 0;
13 unsigned int lastctr = 0;
14 unsigned long pcisave;
15 unsigned char vgasave;
16
17 void set_cr0(unsigned int);
18
19 #define get_cr0() \
20     ({ \
21         register unsigned int _temp__; \
22         asm volatile("mov %%cr0, %0" : "=r" (_temp__)); \
23         _temp__; \
24     })
25
26
27 #define set_cr3(value) \
28     { \
29         register unsigned int _temp__ = (value); \
30         asm volatile("mov %0, %%cr3" : : "r" (_temp__)); \
31      }
32 #define CR0_PG  0x80000000
33
34
35 void smi_entry(void)
36 {
37 /*
38         char statstr[512];
39 */
40
41         outb(0x80, 0xBB);
42         return;
43
44         char * pagedir = pt_setup(0xA0000);
45         outb(0x80, 0x43);
46         set_cr3((int)pagedir);
47         outb(0x80, 0xA5);
48
49         /* Turn paging on */
50         set_cr0(get_cr0() | CR0_PG);
51         outb(0x80, 0xAA);
52
53         pcisave = inl(0xCF8);
54         vgasave = inb(0x3D4);
55 /*
56         pci_unbother_all();
57  */
58         
59         counter++;
60         /*
61         sprintf(statstr, "15-412! %08x %08x", smi_status(), counter);
62         strblit(statstr, 0, 0);
63         */
64         
65         /*
66         eth_poll();
67         */
68         
69         if (inl(0x840) & 0x1000)
70         {
71         /*
72                 pci_dump();
73         */
74                 outl(0x840, 0x1100);
75                 outl(0x840, 0x0100);
76         }
77
78 /*
79         smi_poll();
80         
81         pci_bother_all();
82  */
83         outl(0xCF8, pcisave);
84         outb(0x3D4, vgasave);
85 }
86
87 void timer_handler(smi_event_t ev)
88 {
89         static unsigned int ticks = 0;
90
91         smi_disable_event(SMI_EVENT_FAST_TIMER);
92         smi_enable_event(SMI_EVENT_FAST_TIMER);
93
94         outb(0x80, (ticks++) & 0xFF);
95
96         outlog();
97 }
98
99
100 void __firstrun_start() {
101         smi_disable();
102         outb(0x80, 0x41);
103
104         smi_register_handler(SMI_EVENT_FAST_TIMER, timer_handler);
105         smi_enable_event(SMI_EVENT_FAST_TIMER);
106
107         smi_enable();
108 }
109
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