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ARMv7-M SysTick fix. 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3727 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2007-11-24 03:09:07 +00:00
parent aae9366a03
commit e57ec0168c
4 changed files with 9 additions and 11 deletions
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1
hw/arm-misc.h
View File

@ -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 */

2
hw/arm_gic.c
View File

@ -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);
}

9
hw/armv7m_nvic.c
View File

@ -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;
}

8
hw/stellaris.c
View File

@ -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;