Create extents for resource accounting on the root PCI bus and populate them

based on the BIOS memory map.

3 files changed, 51 insertions, 3 deletions

diff --git a/sys/arch/amd64/amd64/mainbus.c b/sys/arch/amd64/amd64/mainbus.c
index 9d643bc9e94..bffd3b32e32 100644
--- a/sys/arch/amd64/amd64/mainbus.c
+++ b/sys/arch/amd64/amd64/mainbus.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mainbus.c,v 1.17 2009/03/31 22:19:57 kettenis Exp $	*/
+/*	$OpenBSD: mainbus.c,v 1.18 2009/04/11 17:13:33 kettenis Exp $	*/
 /*	$NetBSD: mainbus.c,v 1.1 2003/04/26 18:39:29 fvdl Exp $	*/
 
 /*
@@ -196,11 +196,15 @@ mainbus_attach(struct device *parent, struct device *self, void *aux)
 
 #if NPCI > 0
 	if (pci_mode != 0) {
+		pci_init_extents();
+
 		bzero(&mba.mba_pba, sizeof(mba.mba_pba));
 		mba.mba_pba.pba_busname = "pci";
 		mba.mba_pba.pba_iot = X86_BUS_SPACE_IO;
 		mba.mba_pba.pba_memt = X86_BUS_SPACE_MEM;
 		mba.mba_pba.pba_dmat = &pci_bus_dma_tag;
+		mba.mba_pba.pba_ioex = pciio_ex;
+		mba.mba_pba.pba_memex = pcimem_ex;
 		mba.mba_pba.pba_domain = pci_ndomains++;
 		mba.mba_pba.pba_bus = 0;
 		config_found(self, &mba.mba_pba, mainbus_print);
diff --git a/sys/arch/amd64/include/pci_machdep.h b/sys/arch/amd64/include/pci_machdep.h
index de5e88d3146..f9e754a32df 100644
--- a/sys/arch/amd64/include/pci_machdep.h
+++ b/sys/arch/amd64/include/pci_machdep.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pci_machdep.h,v 1.9 2009/04/04 16:03:17 kettenis Exp $	*/
+/*	$OpenBSD: pci_machdep.h,v 1.10 2009/04/11 17:13:33 kettenis Exp $	*/
 /*	$NetBSD: pci_machdep.h,v 1.1 2003/02/26 21:26:11 fvdl Exp $	*/
 
 /*
@@ -78,6 +78,10 @@ extern int pci_mode;
 int		pci_mode_detect(void);
 struct		pci_attach_args;
 
+extern struct extent *pciio_ex;
+extern struct extent *pcimem_ex;
+void		pci_init_extents(void);
+
 /*
  * Functions provided to machine-independent PCI code.
  */
diff --git a/sys/arch/amd64/pci/pci_machdep.c b/sys/arch/amd64/pci/pci_machdep.c
index 96b62150d83..e91d7e8215f 100644
--- a/sys/arch/amd64/pci/pci_machdep.c
+++ b/sys/arch/amd64/pci/pci_machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pci_machdep.c,v 1.24 2009/04/04 16:03:17 kettenis Exp $	*/
+/*	$OpenBSD: pci_machdep.c,v 1.25 2009/04/11 17:13:33 kettenis Exp $	*/
 /*	$NetBSD: pci_machdep.c,v 1.3 2003/05/07 21:33:58 fvdl Exp $	*/
 
 /*-
@@ -79,6 +79,8 @@
 #include <sys/systm.h>
 #include <sys/errno.h>
 #include <sys/device.h>
+#include <sys/extent.h>
+#include <sys/malloc.h>
 
 #include <uvm/uvm_extern.h>
 
@@ -86,6 +88,7 @@
 
 #include <machine/pio.h>
 #include <machine/intr.h>
+#include <machine/biosvar.h>
 
 #include <dev/isa/isareg.h>
 #include <dev/isa/isavar.h>
@@ -549,3 +552,40 @@ pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie)
 {
 	intr_disestablish(cookie);
 }
+
+struct extent *pciio_ex;
+struct extent *pcimem_ex;
+
+void
+pci_init_extents(void)
+{
+	bios_memmap_t *bmp;
+	u_int64_t size;
+
+	if (pciio_ex == NULL)
+		pciio_ex = extent_create("pciio", 0, 0xffff, M_DEVBUF,
+		    NULL, 0, EX_NOWAIT);
+
+	if (pcimem_ex == NULL) {
+		pcimem_ex = extent_create("pcimem", 0, 0xffffffff, M_DEVBUF,
+		    NULL, 0, EX_NOWAIT);
+		if (pcimem_ex == NULL)
+			return;
+
+		for (bmp = bios_memmap; bmp->type != BIOS_MAP_END; bmp++) {
+			/*
+			 * Ignore address space beyond 4G.
+			 */
+			if (bmp->addr >= 0x100000000ULL)
+				continue;
+			size = bmp->size;
+			if (bmp->addr + size >= 0x100000000ULL)
+				size = 0x100000000ULL - bmp->addr;
+
+			if (extent_alloc_region(pcimem_ex, bmp->addr, size,
+			    EX_NOWAIT))
+				printf("memory map conflict 0x%llx/0x%llx\n",
+				    bmp->addr, bmp->size);
+		}
+	}
+}