Factor triplicated code responsible to add memory information into a

single place.

7 files changed, 174 insertions, 206 deletions

diff --git a/sys/arch/mips64/include/memconf.h b/sys/arch/mips64/include/memconf.h
index d7dd6390168..cb9c3c9cdac 100644
--- a/sys/arch/mips64/include/memconf.h
+++ b/sys/arch/mips64/include/memconf.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: memconf.h,v 1.4 2008/04/07 22:40:56 miod Exp $	*/
+/*	$OpenBSD: memconf.h,v 1.5 2009/11/19 06:06:49 miod Exp $	*/
 
 /*
  * Copyright (c) 1996 Per Fogelstrom
@@ -33,8 +33,8 @@
 #define _MIPS_MEMCONF_H_
 
 struct phys_mem_desc {
-	u_int32_t	mem_first_page;
-	u_int32_t	mem_last_page;
+	uint64_t	mem_first_page;
+	uint64_t	mem_last_page;
 	unsigned int	mem_freelist;
 };
 
@@ -43,6 +43,7 @@ struct phys_mem_desc {
 #define	MAXMEMSEGS	16
 #endif
 extern struct phys_mem_desc mem_layout[];
+int	memrange_register(uint64_t, uint64_t, uint64_t, unsigned int);
 #endif
 
 #endif /* !_MIPS_MEMCONF_H_ */
diff --git a/sys/arch/mips64/mips64/arcbios.c b/sys/arch/mips64/mips64/arcbios.c
index dd2d984e08e..b96cacb96a7 100644
--- a/sys/arch/mips64/mips64/arcbios.c
+++ b/sys/arch/mips64/mips64/arcbios.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: arcbios.c,v 1.24 2009/11/07 18:56:54 miod Exp $	*/
+/*	$OpenBSD: arcbios.c,v 1.25 2009/11/19 06:06:51 miod Exp $	*/
 /*-
  * Copyright (c) 1996 M. Warner Losh.  All rights reserved.
  * Copyright (c) 1996-2004 Opsycon AB.  All rights reserved.
@@ -37,6 +37,8 @@
 #include <mips64/arcbios.h>
 #include <mips64/archtype.h>
 
+#include <uvm/uvm_extern.h>
+
 #ifdef TGT_ORIGIN
 #include <machine/mnode.h>
 #endif
@@ -215,14 +217,15 @@ void
 bios_configure_memory()
 {
 	arc_mem_t *descr = NULL;
-	struct phys_mem_desc *m;
 	uint64_t start, count;
 	MEMORYTYPE type;
-	vaddr_t seg_start, seg_end;
+	uint64_t seg_start, seg_end;
 #ifdef TGT_ORIGIN
 	int seen_free = 0;
 #endif
+#ifdef DEBUG
 	int i;
+#endif
 
 	descr = (arc_mem_t *)Bios_GetMemoryDescriptor(descr);
 	while (descr != NULL) {
@@ -240,11 +243,13 @@ bios_configure_memory()
 			 * Memory above 1GB physical (address 1.5GB)
 			 * gets reported as reserved on Octane, while
 			 * it isn't.
+			 * Abort scan at this point, platform dependent
+			 * code will add the remaining memory, if any.
 			 */
 			if (sys_config.system_type == SGI_OCTANE &&
 			    type == FirmwarePermanent &&
 			    start >= 0x60000)
-				type = FreeMemory;
+				break;
 #endif
 
 #ifdef TGT_ORIGIN
@@ -292,13 +297,14 @@ bios_configure_memory()
 #endif	/* O200 || O300 */
 		}
 
-		seg_start = start;
+		/* convert from ARCBios page size to kernel page size */
+		seg_start = atop(start * 4096);
+		count = atop(count * 4096);
 		seg_end = seg_start + count;
 
 		switch (type) {
-		case BadMemory:		/* Have no use for these */
+		case BadMemory:		/* have no use for these */
 			break;
-
 		case LoadedProgram:
 			/*
 			 * LoadedProgram areas are either the boot loader,
@@ -311,29 +317,9 @@ bios_configure_memory()
 			/* FALLTHROUGH */
 		case FreeMemory:
 		case FreeContigous:
-			physmem += count;
-			m = NULL;
-			for (i = 0; i < MAXMEMSEGS; i++) {
-				if (mem_layout[i].mem_last_page == 0) {
-					if (m == NULL)
-						m = &mem_layout[i]; /* free */
-				}
-				else if (seg_end == mem_layout[i].mem_first_page) {
-					m = &mem_layout[i];
-					m->mem_first_page = seg_start;
-				}
-				else if (mem_layout[i].mem_last_page == seg_start) {
-					m = &mem_layout[i];
-					m->mem_last_page = seg_end;
-				}
-			}
-			if (m && m->mem_first_page == 0) {
-				m->mem_first_page = seg_start;
-				m->mem_last_page = seg_end;
-				m->mem_freelist = VM_FREELIST_DEFAULT;
-			}
+			memrange_register(seg_start, seg_end, 0,
+			    VM_FREELIST_DEFAULT);
 			break;
-
 		case ExceptionBlock:
 		case SystemParameterBlock:
 		case FirmwareTemporary:
@@ -341,7 +327,6 @@ bios_configure_memory()
 			rsvdmem += count;
 			physmem += count;
 			break;
-
 		default:		/* Unknown type, leave it alone... */
 			break;
 		}
@@ -352,12 +337,12 @@ bios_configure_memory()
 		descr = (arc_mem_t *)Bios_GetMemoryDescriptor(descr);
 	}
 
-#ifdef DEBUG_MEM_LAYOUT
+#ifdef DEBUG
 	for (i = 0; i < MAXMEMSEGS; i++) {
-		if (mem_layout[i].mem_first_page) {
-			bios_printf("MEM %d, 0x%x to  0x%x\n",i,
-				mem_layout[i].mem_first_page * 4096,
-				mem_layout[i].mem_last_page * 4096);
+		if (mem_layout[i].mem_last_page) {
+			bios_printf("MEM %d, %p to  %p\n", i,
+			    ptoa(mem_layout[i].mem_first_page),
+			    ptoa(mem_layout[i].mem_last_page));
 	    }
 	}
 #endif
diff --git a/sys/arch/sgi/sgi/autoconf.c b/sys/arch/sgi/sgi/autoconf.c
index d031893f350..493a13db8cd 100644
--- a/sys/arch/sgi/sgi/autoconf.c
+++ b/sys/arch/sgi/sgi/autoconf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: autoconf.c,v 1.28 2009/11/07 22:48:37 miod Exp $	*/
+/*	$OpenBSD: autoconf.c,v 1.29 2009/11/19 06:06:51 miod Exp $	*/
 /*
  * Copyright (c) 2009 Miodrag Vallat.
  *
@@ -95,9 +95,13 @@
 #include <sys/device.h>
 
 #include <machine/autoconf.h>
+#include <machine/memconf.h>
+
 #include <mips64/arcbios.h>
 #include <mips64/archtype.h>
 
+#include <uvm/uvm_extern.h>
+
 #include <sgi/xbow/xbow.h>
 #include <dev/pci/pcivar.h>
 #include <scsi/scsi_all.h>
@@ -154,6 +158,69 @@ diskconf(void)
 	dumpconf();
 }
 
+/*
+ * Register a memory region.
+ */
+int
+memrange_register(uint64_t startpfn, uint64_t endpfn, uint64_t bmask,
+    unsigned int freelist)
+{
+	struct phys_mem_desc *cur, *m = NULL;
+	int i;
+
+#ifdef DEBUG
+{
+	extern int console_ok;
+
+	if (console_ok)
+		printf("%s: memory from %p to %p\n",
+		    __func__, ptoa(startpfn), ptoa(endpfn));
+	else
+		bios_printf("%s: memory from %p to %p\n",
+		     __func__, ptoa(startpfn), ptoa(endpfn));
+}
+#endif
+	physmem += endpfn - startpfn;
+
+	/*
+	 * Prevent use of memory above 16GB physical, until pmap can support
+	 * this.
+	 */
+	if (startpfn >= atop(16UL * 1024 * 1024 * 1024))
+		return 0;
+	if (endpfn >= atop(16UL * 1024 * 1024 * 1024))
+		endpfn = atop(16UL * 1024 * 1024 * 1024);
+	
+	for (i = 0, cur = mem_layout; i < MAXMEMSEGS; i++, cur++) {
+		if (cur->mem_last_page == 0) {
+			if (m == NULL)
+				m = cur;	/* first free segment */
+			continue;
+		}
+		/* merge contiguous areas if on the same freelist */
+		if (cur->mem_freelist == freelist) {
+			if (cur->mem_first_page == endpfn &&
+			    ((cur->mem_last_page ^ startpfn) & bmask) == 0) {
+				cur->mem_first_page = startpfn;
+				return 0;
+			}
+			if (cur->mem_last_page == startpfn &&
+			    ((cur->mem_first_page ^ endpfn) & bmask) == 0) {
+				cur->mem_last_page = endpfn;
+				return 0;
+			}
+		}
+	}
+
+	if (m == NULL)
+		return ENOMEM;
+	
+	m->mem_first_page = startpfn;
+	m->mem_last_page = endpfn;
+	m->mem_freelist = freelist;
+	return 0;
+}
+
 static char bootpath_store[sizeof osloadpartition];
 static char *bootpath_curpos;
 static char *bootpath_lastpos;
diff --git a/sys/arch/sgi/sgi/ip30_machdep.c b/sys/arch/sgi/sgi/ip30_machdep.c
index e03565a7b1e..e415d8d2a3e 100644
--- a/sys/arch/sgi/sgi/ip30_machdep.c
+++ b/sys/arch/sgi/sgi/ip30_machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ip30_machdep.c,v 1.16 2009/11/18 19:05:51 miod Exp $	*/
+/*	$OpenBSD: ip30_machdep.c,v 1.17 2009/11/19 06:06:51 miod Exp $	*/
 
 /*
  * Copyright (c) 2008, 2009 Miodrag Vallat.
@@ -66,12 +66,10 @@ static int ip30_cpu_exists(int);
 void
 ip30_setup()
 {
-#if 0
 	paddr_t heart;
 	int bank;
 	uint32_t memcfg;
-	uint64_t start, count;
-#endif
+	uint64_t start, count, end;
 	u_long cpuspeed;
 
 	/*
@@ -80,17 +78,17 @@ ip30_setup()
 	 */
 	uncached_base = PHYS_TO_XKPHYS(0, CCA_NC);
 
-#if 0
 	/*
-	 * Scan for memory. ARCBios reports at least up to 2GB; if
-	 * memory above 2GB isn't reported, we'll need to re-enable this
-	 * code and add the unseen areas.
+	 * Scan for memory. ARCBios reports up to 1GB of memory as available,
+	 * and anything after is reported as reserved.
 	 */
 	heart = PHYS_TO_XKPHYS(HEART_PIU_BASE, CCA_NC);
 	for (bank = 0; bank < 8; bank++) {
-		memcfg = *(uint32_t *)
+		memcfg = *(volatile uint32_t *)
 		    (heart + HEART_MEMORY_STATUS + bank * sizeof(uint32_t));
+#ifdef DEBUG
 		bios_printf("memory bank %d: %08x\n", bank, memcfg);
+#endif
 
 		if (!ISSET(memcfg, HEART_MEMORY_VALID))
 			continue;
@@ -105,11 +103,34 @@ ip30_setup()
 
 		/* Physical memory starts at 512MB */
 		start += IP30_MEMORY_BASE;
+		end = start + count;
+#ifdef DEBUG
 		bios_printf("memory from %p to %p\n",
-		    ptoa(start), ptoa(start + count));
-	}
+		    start, end);
 #endif
 
+		/*
+		 * Add memory not obtained through ARCBios.
+		 */
+		if (start >= IP30_MEMORY_BASE + IP30_MEMORY_ARCBIOS_LIMIT) {
+			/*
+			 * XXX Temporary until there is a way to cope with
+			 * XXX xbridge ATE shortage.
+			 */
+			if (end > (2UL << 30)) {
+#if 0
+				physmem += atop(end - (2UL << 30));
+#endif
+				end = 2UL << 30;
+			}
+			if (end <= start)
+				continue;
+
+			memrange_register(start, count, 0, VM_FREELIST_DEFAULT);
+		}
+	}
+
+
 	xbow_widget_base = ip30_widget_short;
 	xbow_widget_map = ip30_widget_map;
 	xbow_widget_id = ip30_widget_id;
diff --git a/sys/arch/sgi/sgi/ip32_machdep.c b/sys/arch/sgi/sgi/ip32_machdep.c
index d2bc342e232..492828ef108 100644
--- a/sys/arch/sgi/sgi/ip32_machdep.c
+++ b/sys/arch/sgi/sgi/ip32_machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ip32_machdep.c,v 1.10 2009/10/26 18:00:06 miod Exp $ */
+/*	$OpenBSD: ip32_machdep.c,v 1.11 2009/11/19 06:06:51 miod Exp $ */
 
 /*
  * Copyright (c) 2003-2004 Opsycon AB  (www.opsycon.se / www.opsycon.com)
@@ -56,15 +56,18 @@ void crime_configure_memory(void);
 void
 crime_configure_memory(void)
 {
-	struct phys_mem_desc *m;
 	volatile u_int64_t *bank_ctrl;
 	paddr_t addr;
 	psize_t size;
 	u_int64_t ctrl0, ctrl;
-	u_int32_t first_page, last_page;
-	int bank, i;
+	u_int64_t first_page, last_page;
+	int bank;
+#ifdef DEBUG
+	int i;
+#endif
 
-	bank_ctrl = (void *)PHYS_TO_KSEG1(CRIMEBUS_BASE + CRIME_MEM_BANK0_CONTROL);
+	bank_ctrl =
+	    (void *)PHYS_TO_KSEG1(CRIMEBUS_BASE + CRIME_MEM_BANK0_CONTROL);
 	for (bank = 0; bank < CRIME_MAX_BANKS; bank++) {
 		ctrl = bank_ctrl[bank];
 		addr = (ctrl & CRIME_MEM_BANK_ADDR) << 25;
@@ -95,39 +98,16 @@ crime_configure_memory(void)
 		first_page = atop(addr);
 		last_page = atop(addr + size);
 
-		/*
-		 * Try to coalesce with other memory segments if banks are 
-		 * contiguous.
-		 */
-		m = NULL;
-		for (i = 0; i < MAXMEMSEGS; i++) {
-			if (mem_layout[i].mem_last_page == 0) {
-				if (m == NULL)
-					m = &mem_layout[i];
-			} else if (last_page == mem_layout[i].mem_first_page) {
-				m = &mem_layout[i];
-				m->mem_first_page = first_page;
-			} else if (mem_layout[i].mem_last_page == first_page) {
-				m = &mem_layout[i];
-				m->mem_last_page = last_page;
-			}
-		}
-		if (m != NULL) {
-			if (m->mem_last_page == 0) {
-				m->mem_first_page = first_page;
-				m->mem_last_page = last_page;
-			}
-			m->mem_freelist = VM_FREELIST_DEFAULT;
-			physmem += atop(size);
-		}
+		memrange_register(first_page, last_page, 0,
+		    VM_FREELIST_DEFAULT);
 	}
 
 #ifdef DEBUG
 	for (i = 0; i < MAXMEMSEGS; i++)
-		if (mem_layout[i].mem_first_page)
-			bios_printf("MEM %d, 0x%x to  0x%x\n",i,
-				ptoa(mem_layout[i].mem_first_page),
-				ptoa(mem_layout[i].mem_last_page));
+		if (mem_layout[i].mem_last_page != 0)
+			bios_printf("MEM %d, %p to %p\n", i,
+			    ptoa(mem_layout[i].mem_first_page),
+			    ptoa(mem_layout[i].mem_last_page));
 #endif
 }
 
diff --git a/sys/arch/sgi/sgi/machdep.c b/sys/arch/sgi/sgi/machdep.c
index 2ffbcbd98f7..815ad599b26 100644
--- a/sys/arch/sgi/sgi/machdep.c
+++ b/sys/arch/sgi/sgi/machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: machdep.c,v 1.87 2009/11/07 18:56:55 miod Exp $ */
+/*	$OpenBSD: machdep.c,v 1.88 2009/11/19 06:06:51 miod Exp $ */
 
 /*
  * Copyright (c) 2003-2004 Opsycon AB  (www.opsycon.se / www.opsycon.com)
@@ -305,9 +305,9 @@ mips_init(int argc, void *argv, caddr_t boot_esym)
 	uvmexp.pagesize = PAGE_SIZE;
 	uvm_setpagesize();
 
-	for (i = 0; i < MAXMEMSEGS && mem_layout[i].mem_first_page != 0; i++) {
-		u_int32_t fp, lp;
-		u_int32_t firstkernpage, lastkernpage;
+	for (i = 0; i < MAXMEMSEGS && mem_layout[i].mem_last_page != 0; i++) {
+		uint64_t fp, lp;
+		uint64_t firstkernpage, lastkernpage;
 		unsigned int freelist;
 		paddr_t firstkernpa, lastkernpa;
 
@@ -341,12 +341,13 @@ mips_init(int argc, void *argv, caddr_t boot_esym)
 		else if (lp < lastkernpage)
 			lp = firstkernpage;
 		else { /* Need to split! */
-			u_int32_t xp = firstkernpage;
+			uint64_t xp = firstkernpage;
 			uvm_page_physload(fp, xp, fp, xp, freelist);
 			fp = lastkernpage;
 		}
-		if (lp > fp)
+		if (lp > fp) {
 			uvm_page_physload(fp, lp, fp, lp, freelist);
+		}
 	}
 
 	switch (sys_config.system_type) {
@@ -1042,7 +1043,9 @@ rm7k_perfintr(trapframe)
 {
 	struct proc *p = curproc;
 
+#ifdef DEBUG
 	printf("perfintr proc %p!\n", p);
+#endif
 	cp0_setperfcount(cp0_getperfcount() & 0x7fffffff);
 	if (p != NULL) {
 		p->p_md.md_pc_spill++;
diff --git a/sys/arch/sgi/sgi/sginode.c b/sys/arch/sgi/sgi/sginode.c
index 45b13a21049..22feef77553 100644
--- a/sys/arch/sgi/sgi/sginode.c
+++ b/sys/arch/sgi/sgi/sginode.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sginode.c,v 1.14 2009/11/07 14:49:01 miod Exp $	*/
+/*	$OpenBSD: sginode.c,v 1.15 2009/11/19 06:06:51 miod Exp $	*/
 /*
  * Copyright (c) 2008, 2009 Miodrag Vallat.
  *
@@ -313,9 +313,8 @@ void
 kl_add_memory_ip27(int16_t nasid, int16_t *sizes, unsigned int cnt)
 {
 	paddr_t basepa;
-	uint32_t fp, lp, np;
-	unsigned int seg, descno, nmeg;
-	struct phys_mem_desc *md;
+	uint64_t fp, lp, np;
+	unsigned int seg, nmeg;
 
 	/*
 	 * On IP27, access to each DIMM is interleaved, which cause it to
@@ -325,13 +324,6 @@ kl_add_memory_ip27(int16_t nasid, int16_t *sizes, unsigned int cnt)
 	 */
 	basepa = (paddr_t)nasid << kl_n_shift;
 	while (cnt-- != 0) {
-		/*
-		 * XXX Temporary until there is a way to cope with
-		 * XXX xbridge ATE shortage.
-		 */
-		if (basepa >= (2UL << 30))
-			return;
-
 		nmeg = *sizes++;
 		for (seg = 0; seg < 4; basepa += (1 << 27), seg++) {
 			if (nmeg <= 128)
@@ -361,63 +353,27 @@ kl_add_memory_ip27(int16_t nasid, int16_t *sizes, unsigned int cnt)
 			}
 
 			/*
-			 * Walk the existing segment list to find if we
-			 * are adjacent to an existing segment, or the
-			 * next free segment to use if not (unless doing
-			 * this would cross the 2GB boundary we need for
-			 * 32 bit DMA memory).
-			 *
-			 * Note that since we do not know in which order
-			 * we'll find our nodes, we have to check for
-			 * both boundaries, despite adding a given node's
-			 * memory in increasing pa order.
+			 * XXX Temporary until there is a way to cope with
+			 * XXX xbridge ATE shortage.
 			 */
-			for (descno = 0, md = mem_layout; descno < MAXMEMSEGS;
-			    descno++, md++) {
-				if (md->mem_first_page == 0)
-					break;
-
-				/*
-				 * Do not try to merge segments if they are
-				 * not covering the same node.
-				 */
-				if ((ptoa(md->mem_first_page) >> kl_n_shift) !=
-				    nasid)
-					continue;
-
-				if (md->mem_first_page == lp &&
-				    lp != atop(2UL << 30)) {
-					md->mem_first_page = fp;
-					physmem += np;
-					md = NULL;
-					break;
-				}
-
-				if (md->mem_last_page == fp &&
-				    fp != atop(2UL << 30)) {
-					md->mem_last_page = lp;
-					physmem += np;
-					md = NULL;
-					break;
-				}
-			}
-			if (descno != MAXMEMSEGS && md != NULL) {
-				md->mem_first_page = fp;
-				md->mem_last_page = lp;
-				md->mem_freelist = lp <= atop(2UL << 30) ?
-				    VM_FREELIST_DMA32 : VM_FREELIST_DEFAULT;
-				physmem += np;
-				md = NULL;
+			if (fp >= atop(2UL << 30)) {
+#if 0
+				physmem += lp - fp;
+#endif
+				continue;
 			}
 
-			if (md != NULL) {
+			if (memrange_register(fp, lp,
+			    ~(atop(1UL << kl_n_shift) - 1),
+			    lp <= atop(2UL << 30) ?
+			      VM_FREELIST_DEFAULT : VM_FREELIST_DMA32) != 0) {
 				/*
 				 * We could hijack the smallest segment here.
 				 * But is it really worth doing?
 				 */
 				bios_printf("%u MB of memory could not be "
 				    "managed, increase MAXMEMSEGS\n",
-				    atop(np) >> 20);
+				    ptoa(np) >> 20);
 			}
 		}
 	}
@@ -428,8 +384,6 @@ kl_add_memory_ip35(int16_t nasid, int16_t *sizes, unsigned int cnt)
 {
 	paddr_t basepa;
 	uint32_t fp, lp, np;
-	unsigned int descno;
-	struct phys_mem_desc *md;
 
 	/*
 	 * On IP35, the smallest memory DIMMs are 256MB, and the
@@ -438,13 +392,6 @@ kl_add_memory_ip35(int16_t nasid, int16_t *sizes, unsigned int cnt)
 
 	basepa = (paddr_t)nasid << kl_n_shift;
 	while (cnt-- != 0) {
-		/*
-		 * XXX Temporary until there is a way to cope with
-		 * XXX xbridge ATE shortage.
-		 */
-		if (basepa >= (2UL << 30))
-			return;
-
 		np = *sizes++;
 		if (np != 0) {
 			DB_PRF(("IP35 memory from %p to %p (%u MB)\n",
@@ -467,63 +414,27 @@ kl_add_memory_ip35(int16_t nasid, int16_t *sizes, unsigned int cnt)
 			}
 
 			/*
-			 * Walk the existing segment list to find if we
-			 * are adjacent to an existing segment, or the
-			 * next free segment to use if not (unless doing
-			 * this would cross the 2GB boundary we need for
-			 * 32 bit DMA memory).
-			 *
-			 * Note that since we do not know in which order
-			 * we'll find our nodes, we have to check for
-			 * both boundaries, despite adding a given node's
-			 * memory in increasing pa order.
+			 * XXX Temporary until there is a way to cope with
+			 * XXX xbridge ATE shortage.
 			 */
-			for (descno = 0, md = mem_layout; descno < MAXMEMSEGS;
-			    descno++, md++) {
-				if (md->mem_first_page == 0)
-					break;
-
-				/*
-				 * Do not try to merge segments if they are
-				 * not covering the same node.
-				 */
-				if ((ptoa(md->mem_first_page) >> kl_n_shift) !=
-				    nasid)
-					continue;
-
-				if (md->mem_first_page == lp &&
-				    lp != atop(2UL << 30)) {
-					md->mem_first_page = fp;
-					physmem += np;
-					md = NULL;
-					break;
-				}
-
-				if (md->mem_last_page == fp &&
-				    fp != atop(2UL << 30)) {
-					md->mem_last_page = lp;
-					physmem += np;
-					md = NULL;
-					break;
-				}
-			}
-			if (descno != MAXMEMSEGS && md != NULL) {
-				md->mem_first_page = fp;
-				md->mem_last_page = lp;
-				md->mem_freelist = lp <= atop(2UL << 30) ?
-				    VM_FREELIST_DMA32 : VM_FREELIST_DEFAULT;
-				physmem += np;
-				md = NULL;
+			if (fp >= atop(2UL << 30)) {
+#if 0
+				physmem += lp - fp;
+#endif
+				continue;
 			}
 
-			if (md != NULL) {
+			if (memrange_register(fp, lp,
+			    ~(atop(1UL << kl_n_shift) - 1),
+			    lp <= atop(2UL << 30) ?
+			      VM_FREELIST_DEFAULT : VM_FREELIST_DMA32) != 0) {
 				/*
 				 * We could hijack the smallest segment here.
 				 * But is it really worth doing?
 				 */
 				bios_printf("%u MB of memory could not be "
 				    "managed, increase MAXMEMSEGS\n",
-				    atop(np) >> 20);
+				    ptoa(np) >> 20);
 			}
 		}
 		basepa += 1UL << 30;	/* 1 GB */