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authorLinus Torvalds <torvalds@linux-foundation.org>2010-05-24 08:02:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-24 08:02:58 -0700
commit064e297c324fff9b62226aae5dc468ebb272433c (patch)
tree49d031d180a30d6e94e4cfdcc46ec966399d8856 /arch/blackfin/kernel/exception.c
parentf13771187b9423b824f32518319f6da85d819003 (diff)
parentdb52ecc2953d932b2fc1c62e585231659edd1d98 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (30 commits) Blackfin: SMP: fix continuation lines Blackfin: acvilon: fix timeout usage for I2C Blackfin: fix typo in BF537 IRQ comment Blackfin: unify duplicate MEM_MT48LC32M8A2_75 kconfig options Blackfin: set ARCH_KMALLOC_MINALIGN Blackfin: use atomic kmalloc in L1 alloc so it too can be atomic Blackfin: another year of changes (update copyright in boot log) Blackfin: optimize strncpy a bit Blackfin: isram: clean up ITEST_COMMAND macro and improve the selftests Blackfin: move string functions to normal lib/ assembly Blackfin: SIC: cut down on IAR MMR reads a bit Blackfin: bf537-minotaur: fix build errors due to header changes Blackfin: kgdb: pass up the CC register instead of a 0 stub Blackfin: handle HW errors in the new "FAULT" printing code Blackfin: show the whole accumulator in the pseudo DBG insn Blackfin: support all possible registers in the pseudo instructions Blackfin: add support for the DBG (debug output) pseudo insn Blackfin: change the BUG opcode to an unused 16-bit opcode Blackfin: allow NMI watchdog to be used w/RETN as a scratch reg Blackfin: add support for the DBGA (debug assert) pseudo insn ...
Diffstat (limited to 'arch/blackfin/kernel/exception.c')
-rw-r--r--arch/blackfin/kernel/exception.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/exception.c b/arch/blackfin/kernel/exception.c
new file mode 100644
index 000000000000..9208b5fd5186
--- /dev/null
+++ b/arch/blackfin/kernel/exception.c
@@ -0,0 +1,45 @@
+/* Basic functions for adding/removing custom exception handlers
+ *
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#include <linux/module.h>
+#include <asm/irq_handler.h>
+
+int bfin_request_exception(unsigned int exception, void (*handler)(void))
+{
+ void (*curr_handler)(void);
+
+ if (exception > 0x3F)
+ return -EINVAL;
+
+ curr_handler = ex_table[exception];
+
+ if (curr_handler != ex_replaceable)
+ return -EBUSY;
+
+ ex_table[exception] = handler;
+
+ return 0;
+}
+EXPORT_SYMBOL(bfin_request_exception);
+
+int bfin_free_exception(unsigned int exception, void (*handler)(void))
+{
+ void (*curr_handler)(void);
+
+ if (exception > 0x3F)
+ return -EINVAL;
+
+ curr_handler = ex_table[exception];
+
+ if (curr_handler != handler)
+ return -EBUSY;
+
+ ex_table[exception] = ex_replaceable;
+
+ return 0;
+}
+EXPORT_SYMBOL(bfin_free_exception);