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authorCatalin Marinas <catalin.marinas@arm.com>2012-03-05 11:49:27 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2012-09-17 10:24:46 +0100
commit60ffc30d5652810dd34ea2eec41504222f5d5791 (patch)
treeb1d8364b8a86df0327b2f6318c4f59e973695337 /arch/arm64/include/asm/traps.h
parentarm64: Kernel booting and initialisation (diff)
downloadlinux-dev-60ffc30d5652810dd34ea2eec41504222f5d5791.tar.xz
linux-dev-60ffc30d5652810dd34ea2eec41504222f5d5791.zip
arm64: Exception handling
The patch contains the exception entry code (kernel/entry.S), pt_regs structure and related accessors, undefined instruction trapping and stack tracing. AArch64 Linux kernel (including kernel threads) runs in EL1 mode using the SP1 stack. The vectors don't have a fixed address, only alignment (2^11) requirements. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm64/include/asm/traps.h')
-rw-r--r--arch/arm64/include/asm/traps.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/traps.h b/arch/arm64/include/asm/traps.h
new file mode 100644
index 000000000000..10ca8ff93cc2
--- /dev/null
+++ b/arch/arm64/include/asm/traps.h
@@ -0,0 +1,30 @@
+/*
+ * Based on arch/arm/include/asm/traps.h
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_TRAP_H
+#define __ASM_TRAP_H
+
+static inline int in_exception_text(unsigned long ptr)
+{
+ extern char __exception_text_start[];
+ extern char __exception_text_end[];
+
+ return ptr >= (unsigned long)&__exception_text_start &&
+ ptr < (unsigned long)&__exception_text_end;
+}
+
+#endif