X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Farm%2Fkernel%2Fentry-armv.S;h=8517c3c3eb3393c8ba539add942342757c117f2b;hb=refs%2Fheads%2Fvserver;hp=de4e331379013229082a76f86a3c314492ba206d;hpb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;p=linux-2.6.git

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index de4e33137..8517c3c3e 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -191,6 +191,9 @@ __dabt_svc:
 __irq_svc:
 	svc_entry
 
+#ifdef CONFIG_TRACE_IRQFLAGS
+	bl	trace_hardirqs_off
+#endif
 #ifdef CONFIG_PREEMPT
 	get_thread_info tsk
 	ldr	r8, [tsk, #TI_PREEMPT]		@ get preempt count
@@ -211,6 +214,10 @@ preempt_return:
 #endif
 	ldr	r0, [sp, #S_PSR]		@ irqs are already disabled
 	msr	spsr_cxsf, r0
+#ifdef CONFIG_TRACE_IRQFLAGS
+	tst	r0, #PSR_I_BIT
+	bleq	trace_hardirqs_on
+#endif
 	ldmia	sp, {r0 - pc}^			@ load r0 - pc, cpsr
 
 	.ltorg
@@ -398,6 +405,9 @@ __dabt_usr:
 __irq_usr:
 	usr_entry
 
+#ifdef CONFIG_TRACE_IRQFLAGS
+	bl	trace_hardirqs_off
+#endif
 	get_thread_info tsk
 #ifdef CONFIG_PREEMPT
 	ldr	r8, [tsk, #TI_PREEMPT]		@ get preempt count
@@ -412,6 +422,9 @@ __irq_usr:
 	teq	r0, r7
 	strne	r0, [r0, -r0]
 #endif
+#ifdef CONFIG_TRACE_IRQFLAGS
+	bl	trace_hardirqs_on
+#endif
 
 	mov	why, #0
 	b	ret_to_user
@@ -423,7 +436,7 @@ __und_usr:
 	usr_entry
 
 	tst	r3, #PSR_T_BIT			@ Thumb mode?
-	bne	fpundefinstr			@ ignore FP
+	bne	__und_usr_unknown		@ ignore FP
 	sub	r4, r2, #4
 
 	@
@@ -435,7 +448,7 @@ __und_usr:
 	@
 1:	ldrt	r0, [r4]
 	adr	r9, ret_from_exception
-	adr	lr, fpundefinstr
+	adr	lr, __und_usr_unknown
 	@
 	@ fallthrough to call_fpe
 	@
@@ -463,7 +476,9 @@ __und_usr:
  * Emulators may wish to make use of the following registers:
  *  r0  = instruction opcode.
  *  r2  = PC+4
+ *  r9  = normal "successful" return address
  *  r10 = this threads thread_info structure.
+ *  lr  = unrecognised instruction return address
  */
 call_fpe:
 	tst	r0, #0x08000000			@ only CDP/CPRT/LDC/STC have bit 27
@@ -532,10 +547,12 @@ do_fpe:
 
 	.data
 ENTRY(fp_enter)
-	.word	fpundefinstr
+	.word	no_fp
 	.text
 
-fpundefinstr:
+no_fp:	mov	pc, lr
+
+__und_usr_unknown:
 	mov	r0, sp
 	adr	lr, ret_from_exception
 	b	do_undefinstr
@@ -576,10 +593,6 @@ ENTRY(__switch_to)
 	strex	r5, r4, [ip]			@ Clear exclusive monitor
 #endif
 #endif
-#if defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_IWMMXT)
-	mra	r4, r5, acc0
-	stmia   ip, {r4, r5}
-#endif
 #if defined(CONFIG_HAS_TLS_REG)
 	mcr	p15, 0, r3, c13, c0, 3		@ set TLS register
 #elif !defined(CONFIG_TLS_REG_EMUL)
@@ -588,11 +601,6 @@ ENTRY(__switch_to)
 #endif
 #ifdef CONFIG_MMU
 	mcr	p15, 0, r6, c3, c0, 0		@ Set domain register
-#endif
-#if defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_IWMMXT)
-	add	r4, r2, #TI_CPU_DOMAIN + 40	@ cpu_context_save->extra
-	ldmib	r4, {r4, r5}
-	mar	acc0, r4, r5
 #endif
 	mov	r5, r0
 	add	r4, r2, #TI_CPU_SAVE