aseg/counter.c

   1 #include <io.h>
   2 #include <smram.h>
   3 #include <video_defines.h>
   4 #include <minilib.h>
   5
   6 unsigned int counter = 0;
   7 unsigned long pcisave;
   8 unsigned char vgasave;
   9 char thestr[512];
  10 char logents[4][41] = {{0}};
  11
  12 #define VRAM_BASE               0xA0000UL
  13 #define TEXT_CONSOLE_OFFSET     0x18000UL
  14
  15 #define TEXT_CONSOLE_BASE       (VRAM_BASE + TEXT_CONSOLE_OFFSET)
  16
  17 #define COLOR                   0x1F
  18
  19 unsigned char vga_read(unsigned char idx)
  20 {
  21         outb(CRTC_IDX_REG, idx);
  22         return inb(CRTC_DATA_REG);
  23 }
  24
  25 char * vga_base()
  26 {
  27         return (char *) (
  28                 TEXT_CONSOLE_BASE
  29                 | (((unsigned int) vga_read(CRTC_START_ADDR_LSB_IDX)) << 9)
  30                 | (((unsigned int) vga_read(CRTC_START_ADDR_MSB_IDX)) << 1)
  31         );
  32 }
  33
  34 void strblit(char *src, int row, int col)
  35 {
  36         char *destp = vga_base() + row * 80 * 2 + col * 2;
  37         smram_state_t old_state = smram_save_state();
  38
  39         smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
  40
  41         while (*src)
  42         {
  43                 *(destp++) = *(src++);
  44                 *(destp++) = COLOR;
  45         }
  46
  47         smram_restore_state(old_state);
  48 }
  49
  50 void outlog()
  51 {
  52         int y, x;
  53         char *basep = vga_base();
  54
  55         smram_state_t old_state = smram_save_state();
  56
  57         smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
  58
  59         for (y = 0; y < 4; y++)
  60                 for (x = 40; x < 80; x++)
  61                 {
  62                         basep[y*80*2+x*2] = ' ';
  63                         basep[y*80*2+x*2+1] = 0x1F;
  64                 }
  65
  66         smram_restore_state(old_state);
  67
  68         for (y = 0; y < 4; y++)
  69                 strblit(logents[y], y, 40);
  70 }
  71
  72 void dolog(char *s)
  73 {
  74         memmove(logents[0], logents[1], sizeof(logents[0])*3);
  75         strcpy(logents[3], s);
  76 }
  77
  78 void pci_dump() {
  79         char s[40];
  80         unsigned long cts;
  81         static int curdev = 0;  /* 0 if kbd, 1 if mouse */
  82
  83         cts = inl(0x84C);
  84
  85         outl(0x848, 0x0);
  86
  87         switch(cts&0xF0000)
  88         {
  89         case 0x20000:
  90         {
  91                 unsigned char b;
  92                 strcpy(s, "READxxxxxxxxxxxxxxxx");
  93                 tohex(s+4, cts);
  94                 b = inb(cts & 0xFFFF);
  95                 tohex(s+12, b);
  96                 if ((cts & 0xFFFF) == 0x64)
  97                         curdev = (b & 0x20) ? 1 : 0;
  98                 if ((curdev == 0) && ((cts & 0xFFFF) == 0x60) && (b == 0x01))
  99                         outb(0xCF9, 0x4);
 100                 dolog(s);
 101                 *(unsigned char*)0xAFFD0 /* EAX */ = b;
 102                 break;
 103         }
 104         case 0x30000:
 105         {
 106                 unsigned char b;
 107
 108                 strcpy(s, "WRITxxxxxxxxxxxxxxxx");
 109                 b = *(unsigned char*)0xAFFD0 /* EAX */;
 110                 tohex(s+4, cts);
 111                 tohex(s+12, b);
 112                 dolog(s);
 113                 outb(cts & 0xFFFF, b);
 114                 break;
 115         }
 116         default:
 117                 dolog("Unhandled PCI cycle");
 118         }
 119 }
 120
 121 void __start (void)
 122 {
 123         static int first = 1;
 124
 125         pcisave = inl(0xCF8);
 126         vgasave = inb(0x3D4);
 127
 128         if (first)
 129         {
 130                 first = 0;
 131                 dolog("NetWatch running...");
 132         }
 133
 134         counter++;
 135         outb(0x80, (counter & 0xFF));
 136
 137         strcpy(thestr, "15-412! xxxxxxxx xxxxxxxx");
 138         tohex(thestr + 8, inl(0x0834));
 139         tohex(thestr + 17, counter);
 140         strblit(thestr, 0, 0);
 141
 142         if (inl(0x834) & 0x20)
 143                 dolog("Warning: unhandled APM access");
 144         if (inl(0x834) & 0x1000)
 145         {
 146                 if (inl(0x844) & 0x1000)        /* devact_sts */
 147                 {
 148                         pci_dump();
 149                         outl(0x848, 0x1000);
 150                         outl(0x844, 0x1000);
 151                 }
 152         }
 153         if (inl(0x834) & 0x4000)
 154                 dolog("Long periodic timer");
 155         if (inl(0x840) & 0x1000)
 156         {
 157                 dolog("Caught device monitor trap");
 158                 pci_dump();
 159                 outl(0x840, 0x1100);
 160                 outl(0x840, 0x0100);
 161         }
 162         if (inl(0x834) & ~(0x4160))
 163         {
 164                 char s[40];
 165                 strcpy(s, "Unknown: xxxxxxxx");
 166                 tohex(s + 9, inl(0x834) & ~(0x140));
 167                 dolog(s);
 168         }
 169
 170
 171         outlog();
 172
 173         outl(0xCF8, pcisave);
 174         outb(0x3D4, vgasave);
 175
 176         outl(0x848, 0x1000);
 177         outl(0x834, /*0x40*/0xFFFF);    // ack the periodic IRQ
 178         outb(0x830, (inb(0x830) | 0x2) & ~0x40);
 179         outb(0x830, inb(0x830) | 0x40);
 180
 181 }
 182