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From: Kip Macy <kmacy@FreeBSD.org>
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Subject: PERFORCE change 133440 for review
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http://perforce.freebsd.org/chv.cgi?CH=133440

Change 133440 by kmacy@pandemonium:kmacy:xen31 on 2008/01/16 23:22:25

	increase the segment sizes so that we'll be able to access the machine to physical table on 
	machines with up to 16GB of RAM

Affected files ...

.. //depot/projects/xen31/sys/i386/i386/machdep.c#12 edit

Differences ...

==== //depot/projects/xen31/sys/i386/i386/machdep.c#12 (text+ko) ====

@@ -2159,6 +2159,10 @@
 #ifdef XEN
 extern vm_paddr_t *pdir_shadow;
 
+
+#define MTOPSIZE (1<<(12 + PAGE_SHIFT))
+
+
 void
 init386(int first)
 {
@@ -2200,14 +2204,14 @@
 	 * to physical page frames - hence we need to be able to 
 	 * access 4GB - (64MB  - 4MB + 64k) 
 	 */
-	gdt_segs[GPRIV_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + 256*PAGE_SIZE);
-	gdt_segs[GUFS_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + 256*PAGE_SIZE);
-	gdt_segs[GUGS_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + 256*PAGE_SIZE);
-	gdt_segs[GCODE_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + 256*PAGE_SIZE);
-	gdt_segs[GDATA_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + 256*PAGE_SIZE);
-	gdt_segs[GUCODE_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + 256*PAGE_SIZE);
-	gdt_segs[GUDATA_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + 256*PAGE_SIZE);
-	gdt_segs[GBIOSLOWMEM_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + 256*PAGE_SIZE);
+	gdt_segs[GPRIV_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + MTOPSIZE);
+	gdt_segs[GUFS_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + MTOPSIZE);
+	gdt_segs[GUGS_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + MTOPSIZE);
+	gdt_segs[GCODE_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + MTOPSIZE);
+	gdt_segs[GDATA_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + MTOPSIZE);
+	gdt_segs[GUCODE_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + MTOPSIZE);
+	gdt_segs[GUDATA_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + MTOPSIZE);
+	gdt_segs[GBIOSLOWMEM_SEL].ssd_limit = atop(HYPERVISOR_VIRT_START + MTOPSIZE);
 
 	pc = &__pcpu[0];
 	gdt_segs[GPRIV_SEL].ssd_base = (int) pc;