MFC r259007

Increase PHYS_AVAIL_SZ because on pSeries machines we can have many logical
regions which represent the total amount of memory. The size of these regions
is not the physical size of the chip but it is a logical one and it is given
by the OpenFirmware, it is selectable at boot time and varies between 16MB and
256MB in my case. There is an 'automatic' option which would select the size as
64MB in case you have around 16GB of RAM.
To make sure we can allocate RAM with the automatic option bump this value
of PHYS_AVAIL_SZ to 256.

1 files changed, 5 insertions, 1 deletions

diff --git a/sys/powerpc/include/pmap.h b/sys/powerpc/include/pmap.h
index f50ff11..4b1f4f6 100644
--- a/sys/powerpc/include/pmap.h
+++ b/sys/powerpc/include/pmap.h
@@ -240,7 +240,11 @@ boolean_t	pmap_mmu_install(char *name, int prio);
 
 #define	vtophys(va)	pmap_kextract((vm_offset_t)(va))
 
-#define PHYS_AVAIL_SZ	128
+#define PHYS_AVAIL_SZ	256	/* Allows up to 16GB Ram on pSeries with
+				 * logical memory block size of 64MB.
+				 * For more Ram increase the lmb or this value.
+				 */
+
 extern	vm_offset_t phys_avail[PHYS_AVAIL_SZ];
 extern	vm_offset_t virtual_avail;
 extern	vm_offset_t virtual_end;