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Commit 4d58bbcc authored by Isaku Yamahata's avatar Isaku Yamahata Committed by Tony Luck
Browse files

[IA64] pv_ops: move some functions in ivt.S to avoid lack of space. 



move interrupt, page_fault, non_syscall, dispatch_unaligned_handler and
dispatch_to_fault_handler to avoid lack of instructin space.
The change set 4dcc29e1 bloated
SAVE_MIN_WITH_COVER, SAVE_MIN_WITH_COVER_R19 so that it bloated the
functions which uses those macros.
In the native case, only dispatch_illegal_op_fault had to be moved.
When paravirtualized case the all functions which use the macros need
to be moved to avoid the lack of space.

Signed-off-by: default avatarIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 8a2f2ccc

arch/ia64/kernel/ivt.S

+133 −128
Original line number Diff line number Diff line
@@ -515,27 +515,6 @@ ENTRY(ikey_miss) 
	FAULT(6)

END(ikey_miss)



	//-----------------------------------------------------------------------------------

	// call do_page_fault (predicates are in r31, psr.dt may be off, r16 is faulting address)

ENTRY(page_fault)

	SSM_PSR_DT_AND_SRLZ_I

	;;

	SAVE_MIN_WITH_COVER

	alloc r15=ar.pfs,0,0,3,0

	MOV_FROM_IFA(out0)

	MOV_FROM_ISR(out1)

	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r14, r3)

	adds r3=8,r2				// set up second base pointer

	SSM_PSR_I(p15, p15, r14)		// restore psr.i

	movl r14=ia64_leave_kernel

	;;

	SAVE_REST

	mov rp=r14

	;;

	adds out2=16,r12			// out2 = pointer to pt_regs

	br.call.sptk.many b6=ia64_do_page_fault	// ignore return address

END(page_fault)



	.org ia64_ivt+0x1c00

/////////////////////////////////////////////////////////////////////////////////////////

// 0x1c00 Entry 7 (size 64 bundles) Data Key Miss (12,51)
@@ -896,26 +875,8 @@ END(break_fault) 
/////////////////////////////////////////////////////////////////////////////////////////

// 0x3000 Entry 12 (size 64 bundles) External Interrupt (4)

ENTRY(interrupt)

	DBG_FAULT(12)

	mov r31=pr		// prepare to save predicates

	;;

	SAVE_MIN_WITH_COVER	// uses r31; defines r2 and r3

	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r14)

				// ensure everybody knows psr.ic is back on

	adds r3=8,r2		// set up second base pointer for SAVE_REST

	;;

	SAVE_REST

	;;

	MCA_RECOVER_RANGE(interrupt)

	alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group

	MOV_FROM_IVR(out0, r8)	// pass cr.ivr as first arg

	add out1=16,sp		// pass pointer to pt_regs as second arg

	;;

	srlz.d			// make sure we see the effect of cr.ivr

	movl r14=ia64_leave_kernel

	;;

	mov rp=r14

	br.call.sptk.many b6=ia64_handle_irq

	/* interrupt handler has become too big to fit this area. */

	br.sptk.many __interrupt

END(interrupt)



	.org ia64_ivt+0x3400
@@ -1125,105 +1086,18 @@ END(account_sys_enter) 
	DBG_FAULT(17)

	FAULT(17)



ENTRY(non_syscall)

	mov ar.rsc=r27			// restore ar.rsc before SAVE_MIN_WITH_COVER

	;;

	SAVE_MIN_WITH_COVER



	// There is no particular reason for this code to be here, other than that

	// there happens to be space here that would go unused otherwise.  If this

	// fault ever gets "unreserved", simply moved the following code to a more

	// suitable spot...



	alloc r14=ar.pfs,0,0,2,0

	MOV_FROM_IIM(out0)

	add out1=16,sp

	adds r3=8,r2			// set up second base pointer for SAVE_REST



	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r15, r24)

					// guarantee that interruption collection is on

	SSM_PSR_I(p15, p15, r15)	// restore psr.i

	movl r15=ia64_leave_kernel

	;;

	SAVE_REST

	mov rp=r15

	;;

	br.call.sptk.many b6=ia64_bad_break	// avoid WAW on CFM and ignore return addr

END(non_syscall)



	.org ia64_ivt+0x4800

/////////////////////////////////////////////////////////////////////////////////////////

// 0x4800 Entry 18 (size 64 bundles) Reserved

	DBG_FAULT(18)

	FAULT(18)



	/*

	 * There is no particular reason for this code to be here, other than that

	 * there happens to be space here that would go unused otherwise.  If this

	 * fault ever gets "unreserved", simply moved the following code to a more

	 * suitable spot...

	 */



ENTRY(dispatch_unaligned_handler)

	SAVE_MIN_WITH_COVER

	;;

	alloc r14=ar.pfs,0,0,2,0		// now it's safe (must be first in insn group!)

	MOV_FROM_IFA(out0)

	adds out1=16,sp



	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r24)

						// guarantee that interruption collection is on

	SSM_PSR_I(p15, p15, r3)			// restore psr.i

	adds r3=8,r2				// set up second base pointer

	;;

	SAVE_REST

	movl r14=ia64_leave_kernel

	;;

	mov rp=r14

	br.sptk.many ia64_prepare_handle_unaligned

END(dispatch_unaligned_handler)



	.org ia64_ivt+0x4c00

/////////////////////////////////////////////////////////////////////////////////////////

// 0x4c00 Entry 19 (size 64 bundles) Reserved

	DBG_FAULT(19)

	FAULT(19)



	/*

	 * There is no particular reason for this code to be here, other than that

	 * there happens to be space here that would go unused otherwise.  If this

	 * fault ever gets "unreserved", simply moved the following code to a more

	 * suitable spot...

	 */



ENTRY(dispatch_to_fault_handler)

	/*

	 * Input:

	 *	psr.ic:	off

	 *	r19:	fault vector number (e.g., 24 for General Exception)

	 *	r31:	contains saved predicates (pr)

	 */

	SAVE_MIN_WITH_COVER_R19

	alloc r14=ar.pfs,0,0,5,0

	MOV_FROM_ISR(out1)

	MOV_FROM_IFA(out2)

	MOV_FROM_IIM(out3)

	MOV_FROM_ITIR(out4)

	;;

	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, out0)

						// guarantee that interruption collection is on

	mov out0=r15

	;;

	SSM_PSR_I(p15, p15, r3)			// restore psr.i

	adds r3=8,r2				// set up second base pointer for SAVE_REST

	;;

	SAVE_REST

	movl r14=ia64_leave_kernel

	;;

	mov rp=r14

	br.call.sptk.many b6=ia64_fault

END(dispatch_to_fault_handler)



//

// --- End of long entries, Beginning of short entries

//
@@ -1670,6 +1544,137 @@ END(ia32_interrupt) 
	DBG_FAULT(67)

	FAULT(67)



	//-----------------------------------------------------------------------------------

	// call do_page_fault (predicates are in r31, psr.dt may be off, r16 is faulting address)

ENTRY(page_fault)

	SSM_PSR_DT_AND_SRLZ_I

	;;

	SAVE_MIN_WITH_COVER

	alloc r15=ar.pfs,0,0,3,0

	MOV_FROM_IFA(out0)

	MOV_FROM_ISR(out1)

	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r14, r3)

	adds r3=8,r2				// set up second base pointer

	SSM_PSR_I(p15, p15, r14)		// restore psr.i

	movl r14=ia64_leave_kernel

	;;

	SAVE_REST

	mov rp=r14

	;;

	adds out2=16,r12			// out2 = pointer to pt_regs

	br.call.sptk.many b6=ia64_do_page_fault	// ignore return address

END(page_fault)



ENTRY(non_syscall)

	mov ar.rsc=r27			// restore ar.rsc before SAVE_MIN_WITH_COVER

	;;

	SAVE_MIN_WITH_COVER



	// There is no particular reason for this code to be here, other than that

	// there happens to be space here that would go unused otherwise.  If this

	// fault ever gets "unreserved", simply moved the following code to a more

	// suitable spot...



	alloc r14=ar.pfs,0,0,2,0

	MOV_FROM_IIM(out0)

	add out1=16,sp

	adds r3=8,r2			// set up second base pointer for SAVE_REST



	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r15, r24)

					// guarantee that interruption collection is on

	SSM_PSR_I(p15, p15, r15)	// restore psr.i

	movl r15=ia64_leave_kernel

	;;

	SAVE_REST

	mov rp=r15

	;;

	br.call.sptk.many b6=ia64_bad_break	// avoid WAW on CFM and ignore return addr

END(non_syscall)



ENTRY(__interrupt)

	DBG_FAULT(12)

	mov r31=pr		// prepare to save predicates

	;;

	SAVE_MIN_WITH_COVER	// uses r31; defines r2 and r3

	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r14)

				// ensure everybody knows psr.ic is back on

	adds r3=8,r2		// set up second base pointer for SAVE_REST

	;;

	SAVE_REST

	;;

	MCA_RECOVER_RANGE(interrupt)

	alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group

	MOV_FROM_IVR(out0, r8)	// pass cr.ivr as first arg

	add out1=16,sp		// pass pointer to pt_regs as second arg

	;;

	srlz.d			// make sure we see the effect of cr.ivr

	movl r14=ia64_leave_kernel

	;;

	mov rp=r14

	br.call.sptk.many b6=ia64_handle_irq

END(__interrupt)



	/*

	 * There is no particular reason for this code to be here, other than that

	 * there happens to be space here that would go unused otherwise.  If this

	 * fault ever gets "unreserved", simply moved the following code to a more

	 * suitable spot...

	 */



ENTRY(dispatch_unaligned_handler)

	SAVE_MIN_WITH_COVER

	;;

	alloc r14=ar.pfs,0,0,2,0		// now it's safe (must be first in insn group!)

	MOV_FROM_IFA(out0)

	adds out1=16,sp



	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, r24)

						// guarantee that interruption collection is on

	SSM_PSR_I(p15, p15, r3)			// restore psr.i

	adds r3=8,r2				// set up second base pointer

	;;

	SAVE_REST

	movl r14=ia64_leave_kernel

	;;

	mov rp=r14

	br.sptk.many ia64_prepare_handle_unaligned

END(dispatch_unaligned_handler)



	/*

	 * There is no particular reason for this code to be here, other than that

	 * there happens to be space here that would go unused otherwise.  If this

	 * fault ever gets "unreserved", simply moved the following code to a more

	 * suitable spot...

	 */



ENTRY(dispatch_to_fault_handler)

	/*

	 * Input:

	 *	psr.ic:	off

	 *	r19:	fault vector number (e.g., 24 for General Exception)

	 *	r31:	contains saved predicates (pr)

	 */

	SAVE_MIN_WITH_COVER_R19

	alloc r14=ar.pfs,0,0,5,0

	MOV_FROM_ISR(out1)

	MOV_FROM_IFA(out2)

	MOV_FROM_IIM(out3)

	MOV_FROM_ITIR(out4)

	;;

	SSM_PSR_IC_AND_DEFAULT_BITS_AND_SRLZ_I(r3, out0)

						// guarantee that interruption collection is on

	mov out0=r15

	;;

	SSM_PSR_I(p15, p15, r3)			// restore psr.i

	adds r3=8,r2				// set up second base pointer for SAVE_REST

	;;

	SAVE_REST

	movl r14=ia64_leave_kernel

	;;

	mov rp=r14

	br.call.sptk.many b6=ia64_fault

END(dispatch_to_fault_handler)



	/*

	 * Squatting in this space ...

	 *