modules: sysctl to block module loading

[safe/jmp/linux-2.6] / arch / powerpc / kernel / cpu_setup_44x.S

diff --git a/arch/powerpc/kernel/cpu_setup_44x.S b/arch/powerpc/kernel/cpu_setup_44x.S
index c790634..10b4ab1 100644 (file)
--- a/arch/powerpc/kernel/cpu_setup_44x.S
+++ b/arch/powerpc/kernel/cpu_setup_44x.S
@@ -3,7 +3,7 @@
  * Valentine Barshak <vbarshak@ru.mvista.com>
  * MontaVista Software, Inc (c) 2007
  *
- * Based on cpu_setup_6xx code by 
+ * Based on cpu_setup_6xx code by
  * Benjamin Herrenschmidt <benh@kernel.crashing.org>
  *
  * This program is free software; you can redistribute it and/or
@@ -20,7 +20,30 @@
 _GLOBAL(__setup_cpu_440ep)
        b       __init_fpu_44x
 _GLOBAL(__setup_cpu_440epx)
-       b       __init_fpu_44x
+       mflr    r4
+       bl      __init_fpu_44x
+       bl      __plb_disable_wrp
+       bl      __fixup_440A_mcheck
+       mtlr    r4
+       blr
+_GLOBAL(__setup_cpu_440grx)
+       mflr    r4
+       bl      __plb_disable_wrp
+       bl      __fixup_440A_mcheck
+       mtlr    r4
+       blr
+_GLOBAL(__setup_cpu_460ex)
+_GLOBAL(__setup_cpu_460gt)
+       mflr    r4
+       bl      __init_fpu_44x
+       bl      __fixup_440A_mcheck
+       mtlr    r4
+       blr
+
+_GLOBAL(__setup_cpu_440x5)
+_GLOBAL(__setup_cpu_440gx)
+_GLOBAL(__setup_cpu_440spe)
+       b       __fixup_440A_mcheck
 
 /* enable APU between CPU and FPU */
 _GLOBAL(__init_fpu_44x)
@@ -31,3 +54,19 @@ _GLOBAL(__init_fpu_44x)
        isync
        blr
 
+/*
+ * Workaround for the incorrect write to DDR SDRAM errata.
+ * The write address can be corrupted during writes to
+ * DDR SDRAM when write pipelining is enabled on PLB0.
+ * Disable write pipelining here.
+ */
+#define DCRN_PLB4A0_ACR        0x81
+
+_GLOBAL(__plb_disable_wrp)
+       mfdcr   r3,DCRN_PLB4A0_ACR
+       /* clear WRP bit in PLB4A0_ACR */
+       rlwinm  r3,r3,0,8,6
+       mtdcr   DCRN_PLB4A0_ACR,r3
+       isync
+       blr
+