diff --git a/sys/src/9/bcm/bootargs.c b/sys/src/9/bcm/bootargs.c
index aac14c501..b0feae75e 100644
--- a/sys/src/9/bcm/bootargs.c
+++ b/sys/src/9/bcm/bootargs.c
@@ -12,6 +12,7 @@ static char *confname[MAXCONF];
 static char *confval[MAXCONF];
 static int nconf;
 static char maxmem[256];
+static char pciwin[38], pcidmawin[38];
 
 static int
 findconf(char *k)
@@ -89,23 +90,23 @@ beget4(uchar *p)
 static void
 devtreeprop(char *path, char *key, void *val, int len)
 {
+	uvlong addr, size;
+	uchar *p = val;
+	char *s;
+
 	if((strcmp(path, "/memory") == 0 || strcmp(path, "/memory@0") == 0)
 	&& strcmp(key, "reg") == 0){
 		if(findconf("*maxmem") < 0 && len > 0 && (len % (3*4)) == 0){
-			uvlong top;
-			uchar *p = val;
-			char *s;
-
-			top = (uvlong)beget4(p)<<32 | beget4(p+4);
-			top += beget4(p+8);
-			s = seprint(maxmem, &maxmem[sizeof(maxmem)], "%#llux", top);
+			addr = (uvlong)beget4(p)<<32 | beget4(p+4);
+			addr += beget4(p+8);
+			s = seprint(maxmem, &maxmem[sizeof(maxmem)], "%#llux", addr);
 			p += 3*4;
 			len -= 3*4;
 			while(len > 0){
-				top = (uvlong)beget4(p)<<32 | beget4(p+4);
-				s = seprint(s, &maxmem[sizeof(maxmem)], " %#llux", top);
-				top += beget4(p+8);
-				s = seprint(s, &maxmem[sizeof(maxmem)], " %#llux", top);
+				addr = (uvlong)beget4(p)<<32 | beget4(p+4);
+				s = seprint(s, &maxmem[sizeof(maxmem)], " %#llux", addr);
+				addr += beget4(p+8);
+				s = seprint(s, &maxmem[sizeof(maxmem)], " %#llux", addr);
 				p += 3*4;
 				len -= 3*4;
 			}
@@ -113,6 +114,22 @@ devtreeprop(char *path, char *key, void *val, int len)
 		}
 		return;
 	}
+	if(strncmp(path, "/scb/pcie@", 10) == 0 && len == (3*4 + 4*4)){
+		if((beget4(p) & 0x3000000) == 0x2000000){
+			size = (uvlong)beget4(p+5*4)<<32 | beget4(p+5*4+4);
+			if(strcmp(key, "ranges") == 0 && findconf("*pciwin") < 0){
+				addr = (uvlong)beget4(p+3*4)<<32 | beget4(p+4*4);
+				snprint(pciwin, sizeof(pciwin), "%#llux %#llux", addr, addr+size);
+				addconf("*pciwin", pciwin);
+			} else if(strcmp(key, "dma-ranges") == 0 && findconf("*pcidmawin") < 0){
+				addr = (uvlong)beget4(p+1*4)<<32 | beget4(p+2*4);
+				addr -= (uvlong)beget4(p+3*4)<<32 | beget4(p+4*4);
+				snprint(pcidmawin, sizeof(pcidmawin), "%#llux %#llux", addr, addr+size);
+				addconf("*pcidmawin", pcidmawin);
+			}
+		}
+		return;
+	}
 	if(strcmp(path, "/chosen") == 0 && strcmp(key, "bootargs") == 0){
 		if(len > BOOTARGSLEN)
 			len = BOOTARGSLEN;
diff --git a/sys/src/9/bcm64/dat.h b/sys/src/9/bcm64/dat.h
index fcbd42bba..c5e19ab0d 100644
--- a/sys/src/9/bcm64/dat.h
+++ b/sys/src/9/bcm64/dat.h
@@ -249,7 +249,8 @@ struct Soc {			/* SoC dependent configuration */
 	uintptr	physio;
 	uintptr	virtio;
 	uintptr	armlocal;
-	uintptr	pciwin;
+	uintptr	pciwin;		/* PCI outbound window CPU->PCI */
+	uintptr	pcidmawin;	/* PCI inbound window PCI->DRAM */
 	int	oscfreq;
 };
 extern Soc soc;
diff --git a/sys/src/9/bcm64/io.h b/sys/src/9/bcm64/io.h
index ef6fab282..dec69a5dc 100644
--- a/sys/src/9/bcm64/io.h
+++ b/sys/src/9/bcm64/io.h
@@ -6,5 +6,5 @@ enum {
 	IRQether	= IRQgic + 29,
 };
 
-#define PCIWINDOW	0
+#define PCIWINDOW	soc.pcidmawin
 #define PCIWADDR(va)	(PADDR(va)+PCIWINDOW)
diff --git a/sys/src/9/bcm64/pcibcm.c b/sys/src/9/bcm64/pcibcm.c
index 5a6780465..0ba9b5111 100644
--- a/sys/src/9/bcm64/pcibcm.c
+++ b/sys/src/9/bcm64/pcibcm.c
@@ -244,6 +244,16 @@ void
 pcibcmlink(void)
 {
 	int log2dmasize = 30;	// 1GB
+	char *s;
+
+	if((s = getconf("*pciwin")) != nil){
+		print("*pciwin: %s\n", s);
+		soc.pciwin = (uintptr)strtoll(s, nil, 16);
+	}
+	if((s = getconf("*pcidmawin")) != nil){
+		print("*pcidmawin: %s\n", s);
+		soc.pcidmawin = (uintptr)strtoll(s, nil, 16);
+	}
 
 	regs[RGR1_SW_INIT_1] |= 3;
 	delay(200);
@@ -266,8 +276,8 @@ pcibcmlink(void)
 	// SCB_ACCESS_EN, CFG_READ_UR_MODE, MAX_BURST_SIZE_128, SCB0SIZE
 	regs[MISC_MISC_CTRL] = 1<<12 | 1<<13 | 0<<20 | (log2dmasize-15)<<27;
 
-	regs[MISC_RC_BAR2_CONFIG_LO] = (log2dmasize-15);
-	regs[MISC_RC_BAR2_CONFIG_HI] = 0;
+	regs[MISC_RC_BAR2_CONFIG_LO] = ((u32int)soc.pcidmawin & ~0x1F) | (log2dmasize-15);
+	regs[MISC_RC_BAR2_CONFIG_HI] = soc.pcidmawin >> 32;
 
 	regs[MISC_RC_BAR1_CONFIG_LO] = 0;
 	regs[MISC_RC_BAR3_CONFIG_LO] = 0;