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authorTony Lindgren <tony@atomide.com>2010-01-19 16:40:07 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-01-19 21:23:16 +0100
commit200b7a8dc09504bc0aedac567a307a6e533f39e5 (patch)
treeec735fed9611efcbafd4982cb015eab58b552f27 /arch/arm/kernel/debug.S
parentARM: 5883/1: Revert "disable NX support for OABI-supporting kernels" (diff)
downloadlinux-200b7a8dc09504bc0aedac567a307a6e533f39e5.tar.xz
linux-200b7a8dc09504bc0aedac567a307a6e533f39e5.zip
ARM: 5884/1: arm: Fix DCC console for v7
Without this patch arch/arm/compressed/head.S defaults to generic DCC code that does not work for v7. For more information on the v7 DCC, see Cortex-A8 TRM "12.11.1 Debug communications channel". To use it with post 2.6.33-rc1 or later, you need to have: CONFIG_DEBUG_LL=y ONFIG_DEBUG_ICEDCC=y CONFIG_EARLY_PRINTK=y Earlier kernels need commit 93fd03a8c6728b58879f8af20ffd55d9c32a778b backported. Tested on omap3430. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/debug.S')
-rw-r--r--arch/arm/kernel/debug.S20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S
index b121b6053cce..5c91addcaebc 100644
--- a/arch/arm/kernel/debug.S
+++ b/arch/arm/kernel/debug.S
@@ -49,6 +49,26 @@
1002:
.endm
+#elif defined(CONFIG_CPU_V7)
+
+ .macro addruart, rx
+ .endm
+
+ .macro senduart, rd, rx
+ mcr p14, 0, \rd, c0, c5, 0
+ .endm
+
+ .macro busyuart, rd, rx
+busy: mrc p14, 0, pc, c0, c1, 0
+ bcs busy
+ .endm
+
+ .macro waituart, rd, rx
+wait: mrc p14, 0, pc, c0, c1, 0
+ bcs wait
+
+ .endm
+
#elif defined(CONFIG_CPU_XSCALE)
.macro addruart, rx