don't do accounting on acpi io and memory access.  use tmpmap() for memory
access.

Reference: /n/atom/patch/applied/acpiiotmp
Date: Mon Mar 10 18:35:18 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/acpiio.c	Mon Mar 10 18:19:38 2014
+++ /sys/src/nix/k10/acpiio.c	Mon Mar 10 18:19:39 2014
@@ -11,19 +11,64 @@
 
 extern int pcibusno(void*);
 
+static void
+memtr(char *s, uintmem pa, int len, void *data)
+{
+	if(len <= 8)
+		print("aml: %s %#P len %d %#llux\n", s, pa, len, getle(data, len));
+	else
+		print("aml: %s %#P len %d\n", s, pa, len);
+}
+
+static uint
+seglen(uintmem pa, uintmem len, uintmem sgsz)
+{
+	uintmem end, slen;
+	
+	end = pa+sgsz & ~(sgsz-1);
+	slen = end - pa;
+	if(slen > len)
+		slen = len;
+	return slen;
+}
+
 static int
 readmem(Amlio *io, void *data, int len, int off)
 {
-	memmove(data, io->va + off, len);
-print("aml: readmem: va %#p len %d %llux\n", io->va + off, len, getle(data, len));
+	uchar *va, *d;
+	uintmem s, slen;
+
+	s = io->off+off;
+	d = data;
+	for(; len != 0; len -= slen){
+		slen = seglen(s, len, PGSZ);
+		va = tmpmap(s);
+		memmove(d, va, slen);
+		tmpunmap(va);
+		s += slen;
+		d += slen;
+	}
+	memtr("readmem", io->off+off, len, data);
 	return len;
 }
 
 static int
 writemem(Amlio *io, void *data, int len, int off)
 {
-	memmove(io->va + off, data, len);
-print("aml: writemem: va %#p len %d\n", io->va + off, len);
+	uchar *va, *s;
+	uintmem d, slen;
+
+	d = io->off+off;
+	s = data;
+	for(; len != 0; len -= slen){
+		slen = seglen(d, len, PGSZ);
+		va = tmpmap(d);
+		memmove(va, s, slen);
+		tmpunmap(va);
+		s += slen;
+		d += slen;
+	}
+	memtr("writemem", io->off+off, len, data);
 	return len;
 }
 
@@ -186,19 +231,17 @@
 		print("amlmapio: address space %d not implemented\n", io->space);
 		break;
 	case MemSpace:
-		if((io->va = vmapoverlap(io->off, io->len)) == nil){
-			print("amlmapio: vmap failed: [%llux, %llux)\n", io->off, io->off+io->len);
-			break;
-		}
+		print("aml: map [%#llux, %#llux)\n", io->off, io->off+io->len);
+	//	adrmapck(io->off, io->len, Aacpireclaim, Mfree, Cnone);
 		io->read = readmem;
 		io->write = writemem;
 		return 0;
 	case IoSpace:
 		snprint(buf, sizeof(buf), "%N", io->name);
-		if(ioalloc(io->off, io->len, 0, buf) < 0){
-			print("amlmapio: ioalloc failed\n");
-			break;
-		}
+	//	if(ioalloc(io->off, io->len, 0, buf) < 0){
+	//		print("amlmapio: ioalloc failed [%llux-%llux)\n", io->off, io->off+io->len);
+	//	//	break;
+	//	}
 		io->read = readioport;
 		io->write = writeioport;
 		return 0;
@@ -225,10 +268,9 @@
 {
 	switch(io->space){
 	case MemSpace:
-//		vunmap(io->va, io->len);
 		break;
 	case IoSpace:
-		iofree(io->off);
+	//	iofree(io->off);
 		break;
 	}
 }