refactor out panic

[netwatch.git] / aseg / counter.c

#include <io.h>

unsigned int counter = 0;
unsigned long pcisave;
unsigned char vgasave;
unsigned char thestr[512];
unsigned char logents[4][41] = {0};

unsigned char vgaread(unsigned char idx)
{
	outb(0x3D4, idx);
	inb(0x3D5);
}

void strblit(char *src, int r, int c)
{
	char *destp = (char*)(0xB8000UL | (((unsigned int)vgaread(0xC)) << 9) | (((unsigned int)vgaread(0xD)) << 1)) + r*80*2 + c*2;
	unsigned char smramc;
	
	smramc = pci_read8(0, 0, 0, 0x70);
	pci_write8(0, 0, 0, 0x70, (smramc & 0xF3) | 0x08);
	while (*src)
	{
		*(destp++) = *(src++);
		*(destp++) = 0x1F;
	}
	pci_write8(0, 0, 0, 0x70, smramc);
}

void outlog()
{
	int y, x;
	unsigned char smramc;
	unsigned char *basep = (char*)(0xB8000UL | (((unsigned int)vgaread(0xC)) << 9) | (((unsigned int)vgaread(0xD)) << 1));
	
	smramc = pci_read8(0, 0, 0, 0x70);
	pci_write8(0, 0, 0, 0x70, (smramc & 0xF3) | 0x08);
	for (y = 0; y < 4; y++)
		for (x = 40; x < 80; x++)
		{
			basep[y*80*2+x*2] = ' ';
			basep[y*80*2+x*2+1] = 0x1F;
		}
	pci_write8(0, 0, 0, 0x70, smramc);
	
	for (y = 0; y < 4; y++)
		strblit(logents[y], y, 40);
	
}

void dolog(char *s)
{
	memmove(logents[0], logents[1], sizeof(logents[0])*3);
	strcpy(logents[3], s);
}

void __start (void)
{
	unsigned char smramc;
	static int first = 1;
	
	pcisave = inl(0xCF8);
	vgasave = inb(0x3D4);
	
	if (first)
	{
		first = 0;
		dolog("NetWatch running...");
	}

	counter++;
	outb(0x80, (counter & 0xFF));
	
	strcpy(thestr, "15-412! xxxxxxxx xxxxxxxx");
	tohex(thestr + 8, inl(0x0834));
	tohex(thestr + 17, counter);
	strblit(thestr, 0, 0);
	
	if (inl(0x834) & 0x20)
		dolog("Warning: unhandled APM access");
	if (inl(0x834) & 0x1000)
	{
		if (inl(0x844) & 0x1000)	/* devact_sts */
		{
			unsigned char s[40];
			unsigned long cts;
			static int curdev = 0;	/* 0 if kbd, 1 if mouse */
			
			cts = inl(0x84C);
			
			outl(0x848, 0x0);
			
			switch(cts&0xF0000)
			{
			case 0x20000:
			{
				unsigned char b;
				strcpy(s, "READxxxxxxxxxxxxxxxx");
				tohex(s+4, cts);
				b = inb(cts & 0xFFFF);
				tohex(s+12, b);
				if ((cts & 0xFFFF) == 0x64)
					curdev = (b & 0x20) ? 1 : 0;
				if ((curdev == 0) && ((cts & 0xFFFF) == 0x60) && (b == 0x01))
					outb(0xCF9, 0x4);
				dolog(s);
				*(unsigned char*)0xAFFD0 /* EAX */ = b;
				break;
			}
			case 0x30000:
			{
				unsigned char b;
				
				strcpy(s, "WRITxxxxxxxxxxxxxxxx");
				b = *(unsigned char*)0xAFFD0 /* EAX */;
				tohex(s+4, cts);
				tohex(s+12, b);
				dolog(s);
				outb(cts & 0xFFFF, b);
				break;
			}
			default:
				dolog("Unhandled PCI cycle");
			}
			outl(0x848, 0x1000);
			outl(0x844, 0x1000);
		}
	}
	if (inl(0x834) & 0x4000)
		dolog("Long periodic timer");
	if (inl(0x834) & ~(0x4160))
	{
		unsigned char s[40];
		strcpy(s, "Unknown: xxxxxxxx");
		tohex(s + 9, inl(0x834) & ~(0x140));
		dolog(s);
	}
	
	outlog();
	
	outl(0xCF8, pcisave);
	outb(0x3D4, vgasave);
	
	outl(0x848, 0x1000);
	outl(0x834, /*0x40*/0xFFFF);	// ack the periodic IRQ
	outb(0x830, (inb(0x830) | 0x2) & ~0x40);
	outb(0x830, inb(0x830) | 0x40);
	
}