From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH 2/4] MIPS: avoid excessive exception
Date: Tue, 10 Nov 2015 10:27:14 +0300 [thread overview]
Message-ID: <1447140436-29099-3-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1447140436-29099-1-git-send-email-antonynpavlov@gmail.com>
This commit clears ERL (ERror Level) flag on start.
If this flag is set then we get 'TLB miss on load or ifetch'
just after return from exception.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/include/asm/pbl_macros.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/include/asm/pbl_macros.h b/arch/mips/include/asm/pbl_macros.h
index 681b40a..c4ae6a2 100644
--- a/arch/mips/include/asm/pbl_macros.h
+++ b/arch/mips/include/asm/pbl_macros.h
@@ -145,7 +145,7 @@ copy_loop_exit:
.set push
.set noreorder
mfc0 k0, CP0_STATUS
- li k1, ~ST0_IE
+ li k1, ~(ST0_ERL | ST0_IE)
and k0, k1
mtc0 k0, CP0_STATUS
.set pop
--
2.6.2
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next prev parent reply other threads:[~2015-11-10 7:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-10 7:27 [PATCH 0/4] MIPS: support return from exception; allow user to pass incorrect address to md command Antony Pavlov
2015-11-10 7:27 ` [PATCH 1/4] MIPS: traps.c: separate registers print stuff to show_regs() Antony Pavlov
2015-11-10 7:27 ` Antony Pavlov [this message]
2015-11-10 7:27 ` [PATCH 3/4] MIPS: import exception registers restoring macros from linux kernel Antony Pavlov
2015-11-10 7:27 ` [PATCH 4/4] MIPS: allow user to pass incorrect address to md command Antony Pavlov
2015-11-11 7:40 ` [PATCH 0/4] MIPS: support return from exception; " Sascha Hauer
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