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authorDavid Gibson <david@gibson.dropbear.id.au>2005-08-19 00:52:31 -0400
committerPaul Mackerras <paulus@samba.org>2005-08-28 20:53:33 -0400
commit0ab20002f4b41f4b1799bad5948389da1c4c8444 (patch)
tree631d3f533f47bfbc18be3a18233d9c1ad11d7870 /arch/ppc64/kernel/misc.S
parentc59c464a3e29830bcfae5eea1777cad9e00087f3 (diff)
[PATCH] Remove general use functions from head.S
As well as the interrupt vectors and initialization code, head.S contains several asm functions which are used during runtime. This patch moves these to misc.S, a more sensible location for random asm support code. A couple The functions moved are: disable_kernel_fp giveup_fpu disable_kernel_altivec giveup_altivec __setup_cpu_power3 (empty function) Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel/misc.S')
-rw-r--r--arch/ppc64/kernel/misc.S98
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S
index a05b50b738e9..474df0a862bf 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -680,6 +680,104 @@ _GLOBAL(kernel_thread)
680 ld r30,-16(r1) 680 ld r30,-16(r1)
681 blr 681 blr
682 682
683/*
684 * disable_kernel_fp()
685 * Disable the FPU.
686 */
687_GLOBAL(disable_kernel_fp)
688 mfmsr r3
689 rldicl r0,r3,(63-MSR_FP_LG),1
690 rldicl r3,r0,(MSR_FP_LG+1),0
691 mtmsrd r3 /* disable use of fpu now */
692 isync
693 blr
694
695/*
696 * giveup_fpu(tsk)
697 * Disable FP for the task given as the argument,
698 * and save the floating-point registers in its thread_struct.
699 * Enables the FPU for use in the kernel on return.
700 */
701_GLOBAL(giveup_fpu)
702 mfmsr r5
703 ori r5,r5,MSR_FP
704 mtmsrd r5 /* enable use of fpu now */
705 isync
706 cmpdi 0,r3,0
707 beqlr- /* if no previous owner, done */
708 addi r3,r3,THREAD /* want THREAD of task */
709 ld r5,PT_REGS(r3)
710 cmpdi 0,r5,0
711 SAVE_32FPRS(0, r3)
712 mffs fr0
713 stfd fr0,THREAD_FPSCR(r3)
714 beq 1f
715 ld r4,_MSR-STACK_FRAME_OVERHEAD(r5)
716 li r3,MSR_FP|MSR_FE0|MSR_FE1
717 andc r4,r4,r3 /* disable FP for previous task */
718 std r4,_MSR-STACK_FRAME_OVERHEAD(r5)
7191:
720#ifndef CONFIG_SMP
721 li r5,0
722 ld r4,last_task_used_math@got(r2)
723 std r5,0(r4)
724#endif /* CONFIG_SMP */
725 blr
726
727#ifdef CONFIG_ALTIVEC
728
729#if 0 /* this has no callers for now */
730/*
731 * disable_kernel_altivec()
732 * Disable the VMX.
733 */
734_GLOBAL(disable_kernel_altivec)
735 mfmsr r3
736 rldicl r0,r3,(63-MSR_VEC_LG),1
737 rldicl r3,r0,(MSR_VEC_LG+1),0
738 mtmsrd r3 /* disable use of VMX now */
739 isync
740 blr
741#endif /* 0 */
742
743/*
744 * giveup_altivec(tsk)
745 * Disable VMX for the task given as the argument,
746 * and save the vector registers in its thread_struct.
747 * Enables the VMX for use in the kernel on return.
748 */
749_GLOBAL(giveup_altivec)
750 mfmsr r5
751 oris r5,r5,MSR_VEC@h
752 mtmsrd r5 /* enable use of VMX now */
753 isync
754 cmpdi 0,r3,0
755 beqlr- /* if no previous owner, done */
756 addi r3,r3,THREAD /* want THREAD of task */
757 ld r5,PT_REGS(r3)
758 cmpdi 0,r5,0
759 SAVE_32VRS(0,r4,r3)
760 mfvscr vr0
761 li r4,THREAD_VSCR
762 stvx vr0,r4,r3
763 beq 1f
764 ld r4,_MSR-STACK_FRAME_OVERHEAD(r5)
765 lis r3,MSR_VEC@h
766 andc r4,r4,r3 /* disable FP for previous task */
767 std r4,_MSR-STACK_FRAME_OVERHEAD(r5)
7681:
769#ifndef CONFIG_SMP
770 li r5,0
771 ld r4,last_task_used_altivec@got(r2)
772 std r5,0(r4)
773#endif /* CONFIG_SMP */
774 blr
775
776#endif /* CONFIG_ALTIVEC */
777
778_GLOBAL(__setup_cpu_power3)
779 blr
780
683/* kexec_wait(phys_cpu) 781/* kexec_wait(phys_cpu)
684 * 782 *
685 * wait for the flag to change, indicating this kernel is going away but 783 * wait for the flag to change, indicating this kernel is going away but