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Commit c318d483 authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Optimize hw exception rutine 



Remove set_vms because UMS is cleared and VMS is already setup.
Optimize function calling which save one additional instruction.

Signed-off-by: default avatarMichal Simek <monstr@monstr.eu>
parent b318067e

arch/microblaze/kernel/entry.S

+6 −16
Original line number Diff line number Diff line
@@ -562,10 +562,8 @@ C_ENTRY(full_exception_trap): 
	nop

	mts	rfsr, r0;	/* Clear sticky fsr */

	nop

	addik	r12, r0, full_exception

	set_vms;

	rted	r12, 0;

	nop;

	rted	r0, full_exception

	nop



/*

 * Unaligned data trap.
@@ -599,11 +597,8 @@ C_ENTRY(unaligned_data_trap): 
	nop

	mfs	r4, rear		/* EAR */

	nop

	rtbd	r0, _unaligned_data_exception

	addik	r7, r1, PTO		/* parameter struct pt_regs * regs */

	addik	r12, r0, _unaligned_data_exception

	set_vms;

	rtbd	r12, 0;	/* interrupts enabled */

	nop;



/*

 * Page fault traps.
@@ -635,10 +630,8 @@ C_ENTRY(page_fault_data_trap): 
	nop

	mfs	r7, resr		/* parameter unsigned long error_code */

	nop

	addik	r12, r0, do_page_fault

	set_vms;

	rted	r12, 0;	/* interrupts enabled */

	nop;

	rted	r0, do_page_fault

	nop



C_ENTRY(page_fault_instr_trap):

	SAVE_STATE		/* Save registers.*/
@@ -650,11 +643,8 @@ C_ENTRY(page_fault_instr_trap): 
	addik	r5, r1, PTO		/* parameter struct pt_regs * regs */

	mfs	r6, rear		/* parameter unsigned long address */

	nop

	rted	r0, do_page_fault

	ori	r7, r0, 0		/* parameter unsigned long error_code */

	addik	r12, r0, do_page_fault

	set_vms;

	rted	r12, 0;	/* interrupts enabled */

	nop;



/* Entry point used to return from an exception.  */

C_ENTRY(ret_from_exc):