[PATCH] systemcfg is now a pointer

[Jimi Xenidis]

This is a resend, better explaination.

The following patch "fixes" 2 issues:
  1) use PLATFORM_LPAR bit to test if running in LPAR mode
  2) systemcfg pointer is assigned from static data in
     arch/ppc64/kernel/pacaData.c.  The file arch/ppc64/kernel/head.S
     now refers to is using the GOT binding to the pointer and hence
     must deref it.

let me know if you'd like separate diffs.

Signed-off-by: Jimi Xenidis <jimix at watson.ibm.com>

diff -r e783ced09546 arch/ppc64/kernel/head.S
--- a/arch/ppc64/kernel/head.S	Thu Aug 18 22:16:12 2005
+++ b/arch/ppc64/kernel/head.S	Sat Aug 20 12:10:24 2005
@@ -1753,8 +1753,9 @@
 #else
 	/* set the ASR */
 	ld	r3,systemcfg at got(r2)	/* r3 = ptr to systemcfg	 */
+	ld	r3,0(r3)
 	lwz	r3,PLATFORM(r3)		/* r3 = platform flags		 */
-	cmpldi 	r3,PLATFORM_PSERIES_LPAR
+	andi.	r3,r3,PLATFORM_LPAR	/* Test if bit 0 is set (LPAR bit) */
 	bne	98f
 	mfspr	r3,PVR
 	srwi	r3,r3,16
@@ -1916,8 +1917,9 @@
 	ld	r3,PACASTABREAL(r13)
 	ori	r4,r3,1			/* turn on valid bit		 */
 	ld	r3,systemcfg at got(r2)	/* r3 = ptr to systemcfg */
+	ld	r3,0(r3)
 	lwz	r3,PLATFORM(r3)		/* r3 = platform flags */
-	cmpldi 	r3,PLATFORM_PSERIES_LPAR
+	andi.	r3,r3,PLATFORM_LPAR	/* Test if bit 0 is set (LPAR bit) */
 	bne	98f
 	mfspr	r3,PVR
 	srwi	r3,r3,16
@@ -1935,9 +1937,10 @@
 99:
 	/* Set SDR1 (hash table pointer) */
 	ld	r3,systemcfg at got(r2)	/* r3 = ptr to systemcfg */
+	ld	r3,0(r3)
 	lwz	r3,PLATFORM(r3)		/* r3 = platform flags */
 	/* Test if bit 0 is set (LPAR bit) */
-	andi.	r3,r3,0x1
+	andi.	r3,r3,PLATFORM_LPAR
 	bne	98f
 	LOADADDR(r6,_SDR1)		/* Only if NOT LPAR */
 	sub	r6,r6,r26