[PATCH] ppc32: Improve workaround for 74xx CPUs with broken BTIC

[Benjamin Herrenschmidt]

Hi !

The previous workaround didn't enable the BTIC bit on CPUs where it
is broken. However, it seems some firmwares will unconditionally set
it, so this new patch will actually _clear_ it on CPUs where it is
broken.

Please apply,
Ben.

Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>

===== arch/ppc/kernel/cpu_setup_6xx.S 1.5 vs edited =====
--- 1.5/arch/ppc/kernel/cpu_setup_6xx.S	2004-07-16 02:16:53 +10:00
+++ edited/arch/ppc/kernel/cpu_setup_6xx.S	2004-08-26 19:16:36 +10:00
@@ -218,10 +218,10 @@
 
 	/* All of the bits we have to set.....
 	 */
-	ori	r11,r11,HID0_SGE | HID0_FOLD | HID0_BHTE | HID0_LRSTK
+	ori	r11,r11,HID0_SGE | HID0_FOLD | HID0_BHTE | HID0_LRSTK | HID0_BTIC
 BEGIN_FTR_SECTION
-	ori	r11,r11,HID0_BTIC
-END_FTR_SECTION_IFCLR(CPU_FTR_NO_BTIC)
+	xori	r11,r11,HID0_BTIC
+END_FTR_SECTION_IFSET(CPU_FTR_NO_BTIC)
 BEGIN_FTR_SECTION
 	oris	r11,r11,HID0_DPM@h	/* enable dynamic power mgmt */
 END_FTR_SECTION_IFCLR(CPU_FTR_NO_DPM)


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