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authorMike Frysinger <michael.frysinger@analog.com>2007-08-05 17:03:59 +0800
committerBryan Wu <bryan.wu@analog.com>2007-08-05 17:03:59 +0800
commitf0b5d12f2b3226c85258519d7725e63d9daf5e90 (patch)
treed64fdcf65cb5f647b544ece5f1727af5153c0a3d /arch/blackfin/mach-bf548
parentBlackfin arch: make sure to stub out ANOMALY_05000230 were appropriate (diff)
downloadlinux-dev-f0b5d12f2b3226c85258519d7725e63d9daf5e90.tar.xz
linux-dev-f0b5d12f2b3226c85258519d7725e63d9daf5e90.zip
Blackfin arch: allow people to select the feature that is unavailable to the kernel
- allow people to select the feature that is unavailable to the kernel: NMI, JTAG, or CYCLES. - change default NMI handler to simply dump hardware trace buffer. - remove default NMI handler completely as calling into kernel code is not safe move example handler to wiki so people dont haphazardly copy and paste this stuff thinking its safe Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/mach-bf548')
-rw-r--r--arch/blackfin/mach-bf548/head.S10
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/blackfin/mach-bf548/head.S b/arch/blackfin/mach-bf548/head.S
index 4c7d49f41187..937fbef26a51 100644
--- a/arch/blackfin/mach-bf548/head.S
+++ b/arch/blackfin/mach-bf548/head.S
@@ -50,9 +50,13 @@ ENTRY(__start)
ENTRY(__stext)
/* R0: argument of command line string, passed from uboot, save it */
R7 = R0;
- /* Set the SYSCFG register */
- R0 = 0x36;
- SYSCFG = R0; /*Enable Cycle Counter and Nesting Of Interrupts(3rd Bit)*/
+ /* Enable Cycle Counter and Nesting Of Interrupts */
+#ifdef CONFIG_BFIN_SCRATCH_REG_CYCLES
+ R0 = SYSCFG_SNEN;
+#else
+ R0 = SYSCFG_SNEN | SYSCFG_CCEN;
+#endif
+ SYSCFG = R0;
R0 = 0;
/* Clear Out All the data and pointer Registers*/