From e57ec0168ce21cdda48ddf45d77b76185667d9e6 Mon Sep 17 00:00:00 2001
From: pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Sat, 24 Nov 2007 03:09:07 +0000
Subject: [PATCH] ARMv7-M SysTick fix.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3727 c046a42c-6fe2-441c-8c8c-71466251a162
---
 hw/arm-misc.h    | 1 +
 hw/arm_gic.c     | 2 +-
 hw/armv7m_nvic.c | 9 +++++----
 hw/stellaris.c   | 8 ++------
 4 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/hw/arm-misc.h b/hw/arm-misc.h
index f8011182dd..9c9537974c 100644
--- a/hw/arm-misc.h
+++ b/hw/arm-misc.h
@@ -27,6 +27,7 @@ void arm_load_kernel(CPUState *env, int ram_size, const char *kernel_filename,
                      int board_id, target_phys_addr_t loader_start);
 
 /* armv7m_nvic.c */
+int system_clock_scale;
 qemu_irq *armv7m_nvic_init(CPUState *env);
 
 #endif /* !ARM_MISC_H */
diff --git a/hw/arm_gic.c b/hw/arm_gic.c
index 774b79bf86..82577301b0 100644
--- a/hw/arm_gic.c
+++ b/hw/arm_gic.c
@@ -638,7 +638,7 @@ static void gic_reset(gic_state *s)
         s->cpu_enabled[i] = 0;
 #endif
     }
-    for (i = 0; i < 15; i++) {
+    for (i = 0; i < 16; i++) {
         GIC_SET_ENABLED(i);
         GIC_SET_TRIGGER(i);
     }
diff --git a/hw/armv7m_nvic.c b/hw/armv7m_nvic.c
index 99ea9873a7..fc60487dee 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;
 }
diff --git a/hw/stellaris.c b/hw/stellaris.c
index b7a0374527..7936e0cc2a 100644
--- a/hw/stellaris.c
+++ b/hw/stellaris.c
@@ -42,10 +42,6 @@ typedef const struct {
 
 /* General purpose timer module.  */
 
-/* Multiplication factor to convert from GPTM timer ticks to qemu timer
-   ticks.  */
-static int stellaris_clock_scale;
-
 typedef struct gptm_state {
     uint32_t config;
     uint32_t mode[2];
@@ -90,7 +86,7 @@ static void gptm_reload(gptm_state *s, int n, int reset)
         /* 32-bit CountDown.  */
         uint32_t count;
         count = s->load[0] | (s->load[1] << 16);
-        tick += (int64_t)count * stellaris_clock_scale;
+        tick += (int64_t)count * system_clock_scale;
     } else if (s->config == 1) {
         /* 32-bit RTC.  1Hz tick.  */
         tick += ticks_per_sec;
@@ -480,7 +476,7 @@ static void ssys_write(void *opaque, target_phys_addr_t offset, uint32_t value)
             s->int_status |= (1 << 6);
         }
         s->rcc = value;
-        stellaris_clock_scale = 5 * (((s->rcc >> 23) & 0xf) + 1);
+        system_clock_scale = 5 * (((s->rcc >> 23) & 0xf) + 1);
         break;
     case 0x100: /* RCGC0 */
         s->rcgc[0] = value;
-- 
2.11.0