Module: xenomai-2.6
Branch: master
Commit: 11b70fa35ecb1d800a4f0c51894c24c7ff819ad8
URL:
http://git.xenomai.org/?p=xenomai-2.6.git;a=commit;h=11b70fa35ecb1d800a4f0c51894c24c7ff819ad8
Author: Gilles Chanteperdrix <gilles.chanteperd...@xenomai.org>
Date: Sun Sep 2 22:42:12 2012 +0200
hal/x86: avoid crashes on CPU without a TSC
When compiled with CONFIG_X86_TSC on a pre I-pipe core kernel and the CPU
has no TSC, refuse to start.
---
ksrc/arch/x86/hal_32.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/ksrc/arch/x86/hal_32.c b/ksrc/arch/x86/hal_32.c
index 69ab99d..01c5439 100644
--- a/ksrc/arch/x86/hal_32.c
+++ b/ksrc/arch/x86/hal_32.c
@@ -360,6 +360,15 @@ int rthal_arch_init(void)
old_mksound = kd_mksound;
kd_mksound = &dummy_mksound;
#endif /* !CONFIG_X86_LOCAL_APIC && Linux < 2.6 && !CONFIG_X86_TSC &&
CONFIG_VT */
+#ifdef CONFIG_X86_TSC
+ if (!cpu_has_tsc) {
+ printk("Xenomai: compiled for TSC, but CPU has no TSC\n"
+ " Recompile the kernel selecting a CPU without "
+ "TSC\n");
+ rthal_smi_restore();
+ return -ENODEV;
+ }
+#endif /* X86_TSC */
#endif /* !I-pipe core */
if (rthal_cpufreq_arg == 0)
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