--- zzzz-none-000/linux-2.6.19.2/arch/ppc/kernel/misc.S	2007-01-10 19:10:37.000000000 +0000
+++ davinci-8020-5505/linux-2.6.19.2/arch/ppc/kernel/misc.S	2007-01-11 07:38:19.000000000 +0000
@@ -110,6 +110,80 @@
 	blr
 
 /*
+ * identify_cpu,
+ * called with r3 = data offset and r4 = CPU number
+ * doesn't change r3
+ */
+_GLOBAL(identify_cpu)
+	addis	r8,r3,cpu_specs@ha
+	addi	r8,r8,cpu_specs@l
+	mfpvr	r7
+1:
+	lwz	r5,CPU_SPEC_PVR_MASK(r8)
+	and	r5,r5,r7
+	lwz	r6,CPU_SPEC_PVR_VALUE(r8)
+	cmplw	0,r6,r5
+	beq	1f
+	addi	r8,r8,CPU_SPEC_ENTRY_SIZE
+	b	1b
+1:
+	addis	r6,r3,cur_cpu_spec@ha
+	addi	r6,r6,cur_cpu_spec@l
+	sub	r8,r8,r3
+	stw	r8,0(r6)
+	blr
+
+/*
+ * do_cpu_ftr_fixups - goes through the list of CPU feature fixups
+ * and writes nop's over sections of code that don't apply for this cpu.
+ * r3 = data offset (not changed)
+ */
+_GLOBAL(do_cpu_ftr_fixups)
+	/* Get CPU 0 features */
+	addis	r6,r3,cur_cpu_spec@ha
+	addi	r6,r6,cur_cpu_spec@l
+	lwz	r4,0(r6)
+	add	r4,r4,r3
+	lwz	r4,CPU_SPEC_FEATURES(r4)
+
+	/* Get the fixup table */
+	addis	r6,r3,__start___ftr_fixup@ha
+	addi	r6,r6,__start___ftr_fixup@l
+	addis	r7,r3,__stop___ftr_fixup@ha
+	addi	r7,r7,__stop___ftr_fixup@l
+
+	/* Do the fixup */
+1:	cmplw	0,r6,r7
+	bgelr
+	addi	r6,r6,16
+	lwz	r8,-16(r6)	/* mask */
+	and	r8,r8,r4
+	lwz	r9,-12(r6)	/* value */
+	cmplw	0,r8,r9
+	beq	1b
+	lwz	r8,-8(r6)	/* section begin */
+	lwz	r9,-4(r6)	/* section end */
+	subf.	r9,r8,r9
+	beq	1b
+	/* write nops over the section of code */
+	/* todo: if large section, add a branch at the start of it */
+	srwi	r9,r9,2
+	mtctr	r9
+	add	r8,r8,r3
+	lis	r0,0x60000000@h	/* nop */
+3:	stw	r0,0(r8)
+	andi.	r10,r4,CPU_FTR_SPLIT_ID_CACHE@l
+	beq	2f
+	dcbst	0,r8		/* suboptimal, but simpler */
+	sync
+	icbi	0,r8
+2:	addi	r8,r8,4
+	bdnz	3b
+	sync			/* additional sync needed on g4 */
+	isync
+	b	1b
+
+/*
  * call_setup_cpu - call the setup_cpu function for this cpu
  * r3 = data offset, r24 = cpu number
  *