From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, arc-linux-dev@synopsys.com,
Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: [PATCH 07/19] ARC: entry.S: canonical'ize EXCEPTION_{PROLOGUE,EPILOGUE}
Date: Sun, 7 Jun 2015 14:08:11 +0530 [thread overview]
Message-ID: <1433666303-26112-8-git-send-email-vgupta@synopsys.com> (raw)
In-Reply-To: <1433666303-26112-1-git-send-email-vgupta@synopsys.com>
-EXCEPTION_EPILOGUE introduced
-EXCEPTION_PROLOGUE now also includes reg file saving
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
arch/arc/include/asm/entry.h | 17 +----------------
arch/arc/kernel/entry.S | 4 ++--
2 files changed, 3 insertions(+), 18 deletions(-)
diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h
index 35c4111d8c80..e880a5f1b2e4 100644
--- a/arch/arc/include/asm/entry.h
+++ b/arch/arc/include/asm/entry.h
@@ -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
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index 03a349520b55..d8ec722a936b 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -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
--
1.9.1
next prev parent reply other threads:[~2015-06-07 8:39 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-07 8:38 [PATCH 00/19] ARCv2 port to Linux - (A) prepratory patches Vineet Gupta
2015-06-07 8:38 ` [PATCH 01/19] ARC: mm/cache_arc700.c -> mm/cache.c Vineet Gupta
2015-06-07 8:38 ` [PATCH 02/19] ARC: cacheflush: move some code around, delete old comments Vineet Gupta
2015-06-07 8:38 ` [PATCH 03/19] ARC: cacheflush: No need to retain DC_CTRL from __before_dc_op() Vineet Gupta
2015-06-07 8:38 ` [PATCH 04/19] ARC: untangle cache flush loop Vineet Gupta
2015-06-07 8:38 ` [PATCH 05/19] ARC: entry.S: common'ize scrtach reg freeup in intr + exceptions Vineet Gupta
2015-06-07 8:38 ` [PATCH 06/19] ARC: entry.S: Introduce INTERRUPT_{PROLOGUE,EPILOGUE} Vineet Gupta
2015-06-07 8:38 ` Vineet Gupta [this message]
2015-06-07 8:38 ` [PATCH 08/19] ARC: entry.S: confine EXCEPTION_* macros to one file Vineet Gupta
2015-06-07 8:38 ` [PATCH 09/19] ARC: entry.S: FAKE_RET_FROM_EXCPN can always use r9 Vineet Gupta
2015-06-07 8:38 ` [PATCH 10/19] ARC: entry.S: Trap handler to use r10 for syscall vs. brkpt decision Vineet Gupta
2015-06-07 8:38 ` [PATCH 11/19] ARC: entry.S: comments cleanup Vineet Gupta
2015-06-07 8:38 ` [PATCH 12/19] ARC: entry.S: Ensure that restore_regs is local to compilation unit Vineet Gupta
2015-06-07 8:38 ` [PATCH 13/19] ARC: entry.S: split into ARCompact ISA specific, common bits Vineet Gupta
2015-06-07 8:38 ` [PATCH 14/19] ARC: entry.S: move some code around for cache locality in return path Vineet Gupta
2015-06-07 8:38 ` [PATCH 15/19] ARC: entry.S: micro-optimize Trap handler Vineet Gupta
2015-06-07 8:38 ` Vineet Gupta
2015-06-07 8:38 ` [PATCH 16/19] ARC: entry.S: use single EXCEPTION_PROLOGUE Vineet Gupta
2015-06-07 8:38 ` Vineet Gupta
2015-06-07 8:38 ` [PATCH 17/19] ARC: entry.S: [arcompact] simplify SWITCH_TO_KERNEL_STK Vineet Gupta
2015-06-07 8:38 ` [PATCH 18/19] ARC: Make way for pt_regs != user_regs_struct Vineet Gupta
2015-06-07 8:38 ` Vineet Gupta
2015-06-07 8:38 ` [PATCH 19/19] ARC: intc: split into ARCompact ISA specific, common bits Vineet Gupta
2015-06-07 8:47 ` [PATCH 00/19] ARCv2 port to Linux - (A) prepratory patches Vineet Gupta
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