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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 2/6] ARM: mmu: Add VBAR setup
Date: Thu, 31 Dec 2015 21:58:34 -0800	[thread overview]
Message-ID: <1451627918-31967-2-git-send-email-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <1451627918-31967-1-git-send-email-andrew.smirnov@gmail.com>

Add code to make sure that normal vector exception table, when it is
used due to unavailability of the high vector table, was not re-mapped
from 0x0 via VBAR by someone else before us.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/cpu/mmu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c
index 784221c..e32523b 100644
--- a/arch/arm/cpu/mmu.c
+++ b/arch/arm/cpu/mmu.c
@@ -302,6 +302,12 @@ static void vectors_init(void)
 		 * live without being able to catch NULL pointer dereferences
 		 */
 		exc = arm_create_pte(0x0);
+
+		/*
+		  Make sure that vecotrs are not re-mapped from 0x0
+		  via VBAR (no-op on non-ARMv7)
+		 */
+		set_vbar(0x0);
 	}

 	arm_fixup_vectors();
--
2.5.0

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  reply	other threads:[~2016-01-01  5:59 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-01  5:58 [PATCH 1/6] ARM: asm: Add convenience fucntions to access VBAR Andrey Smirnov
2016-01-01  5:58 ` Andrey Smirnov [this message]
2016-01-04  9:04   ` [PATCH 2/6] ARM: mmu: Add VBAR setup Sascha Hauer
2016-01-01  5:58 ` [PATCH 3/6] ARM: Fix exception table setup in MMU-less mode Andrey Smirnov
2016-01-04  9:27   ` Sascha Hauer
2016-01-04 17:01     ` Andrey Smirnov
2016-01-05  7:40       ` Sascha Hauer
2016-01-01  5:58 ` [PATCH 4/6] i.MX6: pci: Replace magic number with a named constant Andrey Smirnov
2016-01-07  9:04   ` Lucas Stach
2016-01-08  7:53     ` Sascha Hauer
2016-01-01  5:58 ` [PATCH 5/6] i.MX6: pci: Reconcile imx6_pcie_start_link with the kernel code Andrey Smirnov
2016-01-07  9:08   ` Lucas Stach
2016-01-01  5:58 ` [PATCH 6/6] i.MX6: pci: Avoid aborts when asserting PCIe reset Andrey Smirnov
2016-01-04  9:30   ` Sascha Hauer
2016-01-07  9:13   ` Lucas Stach

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