summaryrefslogtreecommitdiffstats
path: root/arch/arm/kernel/head-nommu.S
diff options
context:
space:
mode:
authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2011-12-09 20:52:10 +0100
committerUwe Kleine-König <u.kleine-koenig@pengutronix.de>2013-01-31 21:44:46 +0100
commitbc7dea00a9a0ea385bbc4aed67dfdcf7d8879953 (patch)
tree242257c7c0a016595b672b3151abdf71ec5745a2 /arch/arm/kernel/head-nommu.S
parentb849a60e0903b1c5430c3859864554662e127a8d (diff)
ARM: let CPUs not being able to run in ARM mode enter in THUMB mode
Some ARM cores are not capable to run in ARM mode (e.g. Cortex-M3). So obviously these cannot enter the kernel in ARM mode. Make an exception for them and let them enter in THUMB mode. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Message-Id: 1358162123-30113-1-git-send-email-u.kleine-koenig@pengutronix.de Acked-by: Nicolas Pitre <nico@linaro.org>
Diffstat (limited to 'arch/arm/kernel/head-nommu.S')
-rw-r--r--arch/arm/kernel/head-nommu.S8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index 2c228a07e58..6a2e09c952c 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -32,15 +32,21 @@
* numbers for r1.
*
*/
- .arm
__HEAD
+
+#ifdef CONFIG_CPU_THUMBONLY
+ .thumb
+ENTRY(stext)
+#else
+ .arm
ENTRY(stext)
THUMB( adr r9, BSYM(1f) ) @ Kernel is always entered in ARM.
THUMB( bx r9 ) @ If this is a Thumb-2 kernel,
THUMB( .thumb ) @ switch to Thumb now.
THUMB(1: )
+#endif
setmode PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9 @ ensure svc mode
@ and irqs disabled