ia64/kernel/mca_asm.S

1 /* SPDX-License-Identifier: GPL-2.0 */
8  * 2000-03-15 David Mosberger-Tang <davidm@hpl.hp.com>
11  * 2000-03-29 Chuck Fleckenstein <cfleck@co.intel.com>
15  * 2002-01-04 J.Hall <jenna.s.hall@intel.com>
16  *		Before entering virtual mode code:
21  * 2004-11-12 Russ Anderson <rja@sgi.com>
24  * 2005-12-08 Keith Owens <kaos@sgi.com>
55  * so we can re-use the code for cpu hotplug code as well
68 	ld8 r18=[r2],(O(PTCE_COUNT)-O(PTCE_BASE));;	// r18=ptce_base
76 	adds r20=-1,r20
246 	// This must be done in physical mode
251         // Enter virtual mode from physical mode
263 	mov ar.rsc=3				// set eager mode for C handler
267 	// Call virtual mode handler
277 	// Revert back to physical mode before going back to SAL
307 // virtual mode are called safely.
310 // Therefore register this NOP function to SAL, to prevent entering virtual
311 // mode and resulting warmboot by SAL.
326 // sos->monarch flag in r19.
355 	// This must be done in physical mode
360         // Enter virtual mode from physical mode
372 	mov ar.rsc=3				// set eager mode for C handler
376 	// Call virtual mode handler
386 	// Revert back to physical mode before going back to SAL
440 //	r11 MCA - rendevzous state, INIT - reason code
454 //--
516 	add regs=MCA_PT_REGS_OFFSET-MCA_SOS_OFFSET, regs
523 	st8 [temp1]=temp3,PT(AR_CSD)-PT(B6)		// save b6
524 	st8 [temp2]=temp4,PT(AR_SSD)-PT(B7)		// save b7
529 	st8 [temp1]=temp3,PT(AR_UNAT)-PT(AR_CSD)	// save ar.csd
530 	st8 [temp2]=temp4,PT(AR_PFS)-PT(AR_SSD)		// save ar.ssd
534 	st8 [temp1]=temp3,PT(AR_RNAT)-PT(AR_UNAT)	// save ar.unat
535 	st8 [temp2]=temp4,PT(AR_BSPSTORE)-PT(AR_PFS)	// save ar.pfs
539 	st8 [temp1]=temp3,PT(LOADRS)-PT(AR_RNAT)	// save ar.rnat
540 	st8 [temp2]=temp4,PT(AR_FPSR)-PT(AR_BSPSTORE)	// save ar.bspstore
543 	sub temp3=temp3, temp4	// ar.bsp - ar.bspstore
548 	st8 [temp1]=temp3,PT(AR_CCV)-PT(LOADRS)		// save loadrs
549 	st8 [temp2]=temp4,PT(F6)-PT(AR_FPSR)		// save ar.fpsr
552 	st8 [temp1]=temp3,PT(F7)-PT(AR_CCV)		// save ar.ccv
553 	stf.spill [temp2]=f6,PT(F8)-PT(F6)
555 	stf.spill [temp1]=f7,PT(F9)-PT(F7)
556 	stf.spill [temp2]=f8,PT(F10)-PT(F8)
558 	stf.spill [temp1]=f9,PT(F11)-PT(F9)
565 	add regs=MCA_SWITCH_STACK_OFFSET-MCA_PT_REGS_OFFSET, regs
603 	stf.spill [temp1]=f30,SW(B2)-SW(F30)
604 	stf.spill [temp2]=f31,SW(B3)-SW(F31)
613 	st8 [temp1]=temp3,SW(AR_LC)-SW(B4)	// save b4
620 	// cached data.  The C code uses region 6, uncached virtual.  Ensure
715 //--
762 	ldf.fill f30=[temp1],SW(B2)-SW(F30)
763 	ldf.fill f31=[temp2],SW(B3)-SW(F31)
770 	ld8 temp3=[temp1],SW(AR_LC)-SW(B4)	// restore b4
781 	add regs=MCA_PT_REGS_OFFSET-MCA_SWITCH_STACK_OFFSET, regs
786 	ld8 temp3=[temp1],PT(AR_CSD)-PT(B6)		// restore b6
787 	ld8 temp4=[temp2],PT(AR_SSD)-PT(B7)		// restore b7
791 	ld8 temp3=[temp1],PT(AR_UNAT)-PT(AR_CSD)	// restore ar.csd
792 	ld8 temp4=[temp2],PT(AR_PFS)-PT(AR_SSD)		// restore ar.ssd
797 	add temp1=PT(AR_CCV)-PT(AR_UNAT), temp1
798 	ld8 temp4=[temp2],PT(AR_FPSR)-PT(AR_PFS)	// restore ar.pfs
803 	ld8 temp3=[temp1],PT(F6)-PT(AR_CCV)		// restore ar.ccv
804 	ld8 temp4=[temp2],PT(F7)-PT(AR_FPSR)		// restore ar.fpsr
808 	ldf.fill f6=[temp1],PT(F8)-PT(F6)
809 	ldf.fill f7=[temp2],PT(F9)-PT(F7)
811 	ldf.fill f8=[temp1],PT(F10)-PT(F8)
812 	ldf.fill f9=[temp2],PT(F11)-PT(F9)
818 	add regs=MCA_SOS_OFFSET-MCA_PT_REGS_OFFSET, regs
826 	ld8 r22=[temp1],16	// pal_min_state, virtual
854 	/* Wire IA64_TR_CURRENT_STACK to the stack that we are resuming to.  To
868 	dep r15=-1,r15,61,3			// virtual granule
912 //	On entry, sos->pal_min_state is physical, on exit it is virtual.
914 //--
927 	// Convert to Linux virtual address in region 6 for C code.
930 	dep temp1=-1,ms,62,2		// set region 6
931 	mov temp3=IA64_RBS_OFFSET-MCA_PT_REGS_OFFSET
933 	st8 [temp2]=temp1		// pal_min_state, virtual
956 //	On entry, pal_min_state is virtual, on exit it is physical.
968 //--
988 	ld8 temp2=[temp1],PT(AR_BSPSTORE)-PT(LOADRS)	// restore loadrs
990 	ld8 temp3=[temp1],PT(AR_RNAT)-PT(AR_BSPSTORE)	// restore ar.bspstore
1018 //--
1034 	/* Wire IA64_TR_CURRENT_STACK to the MCA/INIT handler stack.  To avoid
1043 	dep r16=-1,r16,61,3			// virtual granule
1110 	dep r14 = -1, r14, PSR_MC, 1	// set psr.mc
1112 	dep r14 = -1, r14, PSR_IC, 1	// set psr.ic
1114 	dep r14 = -1, r14, PSR_BN, 1	// keep bank1 in use