ARMv7-M SysTick fix.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3727 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 5 insertions, 4 deletions

diff --git a/hw/armv7m_nvic.c b/hw/armv7m_nvic.c
index 99ea987..fc60487 100644
--- a/hw/armv7m_nvic.c
+++ b/hw/armv7m_nvic.c
@@ -48,14 +48,15 @@ typedef struct {
 #define SYSTICK_CLKSOURCE (1 << 2)
 #define SYSTICK_COUNTFLAG (1 << 16)
 
-/* Conversion factor from qemu timer to SysTick frequencies.
-   QEMU uses a base of 1GHz, so these give 20MHz and 1MHz for core and
-   reference frequencies.  */
+/* Multiplication factor to convert from system clock ticks to qemu timer
+   ticks.  */
+int system_clock_scale;
 
+/* Conversion factor from qemu timer to SysTick frequencies.  */
 static inline int64_t systick_scale(nvic_state *s)
 {
     if (s->systick.control & SYSTICK_CLKSOURCE)
-        return 50;
+        return system_clock_scale;
     else
         return 1000;
 }