pc/apm.c (diff list | history)

2000/1018/sys/src/9/pc/apm.c:1,5 – 2000/1019/sys/src/9/pc/apm.c:1,12 (short | long)
Bug fix: work around NEC Versa SX hardware issue. Comment edits. rsc Fri Mar 4 12:44:25 2005
2000/1018		/* * Advanced Power Management 1.2 driver
2000/1019		* Interface to Advanced Power Management 1.2 BIOS * * This is, in many ways, a giant hack, and when things settle down * a bit and standardize, hopefully we can write a driver that deals * more directly with the hardware and thus might be a bit cleaner. * * ACPI might be the answer, but at the moment this is simpler * and more widespread.
2000/1018		*/ #include "u.h"
2000/1018/sys/src/9/pc/apm.c:39,44 – 2000/1019/sys/src/9/pc/apm.c:46,54
2000/1018		* type is 0 for system segment, 1 for code/data. * * clearly we know way too much about the memory unit.
2000/1019		* however, knowing this much about the memory unit * means that the memory unit need not know anything * about us.
2000/1018		* * what a crock. */
2000/1018/sys/src/9/pc/apm.c:67,79 – 2000/1019/sys/src/9/pc/apm.c:77,82
2000/1018		lgdt(ptr); } /* * Must run before mmuinit, since we modify the GDT that * we want the processor to inherit. I think (but am not sure) * that we could run after mmuinit on processor 0 and just * modify m->gdt and then call lgdt() as mmuinit() does, * but this is a bit simpler and safer. */ static ulong ax, cx, dx, di, ebx, esi; static Ureg apmu; static long
2000/1018/sys/src/9/pc/apm.c:139,144 – 2000/1019/sys/src/9/pc/apm.c:142,154
2000/1018		print("apm: missing register %s\n", s); return; }
2000/1019		/* * The NEC Versa SX bios does not report the correct 16-bit code * segment length when loaded directly from mbr -> 9load (as compared * with going through ld.com). We'll make both code segments 64k-1 bytes. */ esi = 0xFFFFFFFF;
2000/1018		/* * We are required by the BIOS to set up three consecutive segments,
2000/1019/sys/src/9/pc/apm.c:162,167 – 2000/1221/sys/src/9/pc/apm.c:162,168 (short | long)
Set new doze function pointer. rsc Fri Mar 4 12:44:25 2005
2000/1018		loadgdt(); addarchfile("apm", 0660, apmread, apmwrite);
2000/1221		doze = halt;
2000/1018		print("apm0: configured cbase %.8lux off %.8lux\n", ax<<4, ebx);
2000/1221/sys/src/9/pc/apm.c:97,109 – 2000/1229/sys/src/9/pc/apm.c:97,104 (short | long)
Remove experimental attempt to resume 3C589. rsc Fri Mar 4 12:44:25 2005
2000/1018		apmwrite(Chan*, void *a, long n, vlong off) { int s; if(off || n != sizeof apmu){ // if(n == 5 && strncmp(a, "ether", 5) == 0){ // ether589reset(); // return 5; // }
2000/1229		if(off || n != sizeof apmu)
2000/1018		error("write a Ureg"); } memmove(&apmu, a, sizeof apmu); s = splhi();
2000/1229/sys/src/9/pc/apm.c:157,163 – 2001/0123/sys/src/9/pc/apm.c:157,162 (short | long)
Remove doze function pointer. rsc Fri Mar 4 12:44:25 2005
2000/1018		loadgdt(); addarchfile("apm", 0660, apmread, apmwrite);
2000/1221		doze = halt;
2000/1018		print("apm0: configured cbase %.8lux off %.8lux\n", ax<<4, ebx);
2001/0123/sys/src/9/pc/apm.c:64,82 – 2002/0109/sys/src/9/pc/apm.c:64,69 (short | long)
Remove loadgdt after changing GDT. XXX Why? rsc Fri Mar 4 12:44:25 2005
2000/1018		((base>>16)&0xFF) | SEGP | SEGPL(0) | flag; } static void loadgdt(void) { ulong x; ushort ptr[3];                  ptr[0] = sizeof(m->gdt); x = (ulong)m->gdt; ptr[1] = x & 0xFFFF; ptr[2] = (x>>16) & 0xFFFF; lgdt(ptr); }                  static ulong ax, cx, dx, di, ebx, esi; static Ureg apmu; static long
2001/0123/sys/src/9/pc/apm.c:154,160 – 2002/0109/sys/src/9/pc/apm.c:141,146
2000/1018		setgdt(APMCSEG, ax<<4, ((esi&0xFFFF)-1)&0xFFFF, SEGEXEC|SEGR|SEGD); setgdt(APMCSEG16, cx<<4, ((esi>>16)-1)&0xFFFF, SEGEXEC|SEGR); setgdt(APMDSEG, dx<<4, (di-1)&0xFFFF, SEGDATA|SEGW|SEGD); loadgdt(); addarchfile("apm", 0660, apmread, apmwrite);