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 08/19] ARC: entry.S: confine EXCEPTION_* macros to one file
Date: Sun, 7 Jun 2015 14:08:12 +0530 [thread overview]
Message-ID: <1433666303-26112-9-git-send-email-vgupta@synopsys.com> (raw)
In-Reply-To: <1433666303-26112-1-git-send-email-vgupta@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
arch/arc/kernel/entry.S | 16 ++++++++++++++++
arch/arc/mm/tlbex.S | 16 +---------------
2 files changed, 17 insertions(+), 15 deletions(-)
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index d8ec722a936b..6cced37e7a76 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -368,6 +368,22 @@ ENTRY(EV_TLBProtV)
END(EV_TLBProtV)
+; Wrapper for Linux page fault handler called from EV_TLBMiss*
+; Very similar to ProtV handler case (6a) above, but avoids the extra checks
+; for Misaligned access
+;
+ENTRY(call_do_page_fault)
+
+ EXCEPTION_PROLOGUE
+ lr r0, [efa] ; Faulting Data address
+ mov r1, sp
+ FAKE_RET_FROM_EXCPN r9
+
+ mov blink, ret_from_exception
+ b do_page_fault
+
+END(call_do_page_fault)
+
; ---------------------------------------------
; Privilege Violation Exception Handler
; ---------------------------------------------
diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S
index d572f1c2c724..d224bf0feefc 100644
--- a/arch/arc/mm/tlbex.S
+++ b/arch/arc/mm/tlbex.S
@@ -366,19 +366,5 @@ do_slow_path_pf:
; Slow path TLB Miss handled as a regular ARC Exception
; (stack switching / save the complete reg-file).
- EXCEPTION_PROLOGUE
-
- ; ------- setup args for Linux Page fault Hanlder ---------
- mov_s r1, sp
- lr r0, [efa]
-
- ; We don't want exceptions to be disabled while the fault is handled.
- ; Now that we have saved the context we return from exception hence
- ; exceptions get re-enable
-
- FAKE_RET_FROM_EXCPN r9
-
- bl do_page_fault
- b ret_from_exception
-
+ b call_do_page_fault
END(EV_TLBMissD)
--
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 ` [PATCH 07/19] ARC: entry.S: canonical'ize EXCEPTION_{PROLOGUE,EPILOGUE} Vineet Gupta
2015-06-07 8:38 ` Vineet Gupta [this message]
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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