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vmx: complete cmos

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aiju 2017-06-15 15:59:02 +00:00
parent bd12cb47ce
commit 439ab7cb0e
1 changed files with 33 additions and 14 deletions
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47
sys/src/cmd/vmx/io.c
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@ -18,17 +18,41 @@ rtcio(int isin, u16int port, u32int val, int sz, void *)
{
static u8int addr;
uintptr basemem, extmem;
static uchar cmos[0x30] = {
[1] 0xff, [3] 0xff, [5] 0xff,
[0xa] 0x26,
[0xb] 0,
[0xd] 1<<7, /* cmos valid */
[0xf] 0x56, /* cmos tests pass */
[0x11] 0x80, /* mouse enabled */
[0x14] 0x2e, /* cga 80-column */
[0x2d] 0x1c, /* caches + fpu enabled */
};
static int cmosinit;
int i, s;
Tm *tm;
if(cmosinit == 0){
basemem = gavail(gptr(0, 0)) >> 10;
if(basemem > 640) basemem = 640;
extmem = gavail(gptr(1<<20, 0)) >> 10;
if(extmem >= 65535) extmem = 65535;
cmos[0x15] = basemem;
cmos[0x16] = basemem >> 8;
cmos[0x17] = extmem;
cmos[0x18] = extmem >> 8;
s = 0;
for(i = 0x10; i < 0x2e; i++)
s += cmos[i];
cmos[0x2e] = s >> 8;
cmos[0x2f] = s;
cmosinit = 1;
}
switch(isin << 16 | port){
case 0x10070: return addr;
case 0x70: addr = val; return 0;
case 0x10071:
tm = gmtime(time(nil));
basemem = gavail(gptr(0, 0)) >> 10;
if(basemem > 640) basemem = 640;
extmem = gavail(gptr(1<<20, 0)) >> 10;
if(extmem >= 65535) extmem = 65535;
switch(addr){
case 0x00: return bcd(tm->sec);
case 0x02: return bcd(tm->min);
@ -37,17 +61,12 @@ rtcio(int isin, u16int port, u32int val, int sz, void *)
case 0x07: return bcd(tm->mday);
case 0x08: return bcd(tm->mon + 1);
case 0x09: return bcd(tm->year % 100);
case 0x0a: return 0x26;
case 0x0b: return 1<<1 | 1<<2;
case 0x0d: return 1<<7; /* cmos valid */
case 0x0e: return 0; /* diagnostics ok */
case 0x10: return 0; /* no floppies */
case 0x15: return basemem;
case 0x16: return basemem >> 8;
case 0x17: return extmem;
case 0x18: return extmem >> 8;
case 0x32: return bcd(tm->year / 100 + 19);
default: vmerror("rtc read from unknown address %#x", addr); return 0;
default:
if(addr < nelem(cmos))
return cmos[addr];
vmerror("rtc read from unknown address %#x", addr);
return 0;
}
}
return iowhine(isin, port, val, sz, "rtc");