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Commit f033737e authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARC: entry.S: canonical'ize EXCEPTION_{PROLOGUE,EPILOGUE}



-EXCEPTION_EPILOGUE introduced
-EXCEPTION_PROLOGUE now also includes reg file saving

Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent 09f3b37e
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+1 −16
Original line number Diff line number Diff line
@@ -401,21 +401,6 @@
	/* ARC700 doesn't provide auto-stack switching */
	SWITCH_TO_KERNEL_STK

	/* save the regfile */
	SAVE_ALL_SYS
.endm

/*--------------------------------------------------------------
 * Save all registers used by Exceptions (TLB Miss, Prot-V, Mem err etc)
 * Requires SP to be already switched to kernel mode Stack
 * sp points to the next free element on the stack at exit of this macro.
 * Registers are pushed / popped in the order defined in struct ptregs
 * in asm/ptrace.h
 * Note that syscalls are implemented via TRAP which is also a exception
 * from CPU's point of view
 *-------------------------------------------------------------*/
.macro SAVE_ALL_SYS

	lr	r9, [ecr]
	st      r9, [sp, 8]    /* ECR */
	st      r0, [sp, 4]    /* orig_r0, needed only for sys calls */
@@ -446,7 +431,7 @@
 * for memory load operations. If used in that way interrupts are deffered
 * by hardware and that is not good.
 *-------------------------------------------------------------*/
.macro RESTORE_ALL_SYS
.macro EXCEPTION_EPILOGUE
	POPAX	erbta
	POPAX	lp_start
	POPAX	lp_end
+2 −2
Original line number Diff line number Diff line
@@ -638,7 +638,7 @@ restore_regs :

	; if Returning from Exception
	bbit0  r10, STATUS_AE_BIT, not_exception
	RESTORE_ALL_SYS
	EXCEPTION_EPILOGUE
	rtie

	; Not Exception so maybe Interrupts (Level 1 or 2)
@@ -704,7 +704,7 @@ not_level1_interrupt:

	;this case is for syscalls or Exceptions (with fake rtie)

	RESTORE_ALL_SYS
	EXCEPTION_EPILOGUE
debug_marker_syscall:
	rtie