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Diffstat (limited to 'hw/slavio_timer.c')
-rw-r--r--hw/slavio_timer.c100
1 files changed, 62 insertions, 38 deletions
diff --git a/hw/slavio_timer.c b/hw/slavio_timer.c
index a81b34ff59..7d9ee4b2ae 100644
--- a/hw/slavio_timer.c
+++ b/hw/slavio_timer.c
@@ -69,6 +69,24 @@ typedef struct SLAVIO_TIMERState {
#define SYS_TIMER_SIZE 0x14
#define CPU_TIMER_SIZE 0x10
+#define SYS_TIMER_OFFSET 0x10000ULL
+#define CPU_TIMER_OFFSET(cpu) (0x1000ULL * cpu)
+
+#define TIMER_LIMIT 0
+#define TIMER_COUNTER 1
+#define TIMER_COUNTER_NORST 2
+#define TIMER_STATUS 3
+#define TIMER_MODE 4
+
+#define TIMER_COUNT_MASK32 0xfffffe00
+#define TIMER_LIMIT_MASK32 0x7fffffff
+#define TIMER_MAX_COUNT64 0x7ffffffffffffe00ULL
+#define TIMER_MAX_COUNT32 0x7ffffe00ULL
+#define TIMER_REACHED 0x80000000
+#define TIMER_PERIOD 500ULL // 500ns
+#define LIMIT_TO_PERIODS(l) ((l) >> 9)
+#define PERIODS_TO_LIMIT(l) ((l) << 9)
+
static int slavio_timer_is_user(SLAVIO_TIMERState *s)
{
return s->master && (s->master->slave_mode & (1 << s->slave_index));
@@ -80,10 +98,10 @@ static void slavio_timer_get_out(SLAVIO_TIMERState *s)
{
uint64_t count;
- count = s->limit - (ptimer_get_count(s->timer) << 9);
- DPRINTF("get_out: limit %" PRIx64 " count %x%08x\n", s->limit, s->counthigh,
- s->count);
- s->count = count & 0xfffffe00;
+ count = s->limit - PERIODS_TO_LIMIT(ptimer_get_count(s->timer));
+ DPRINTF("get_out: limit %" PRIx64 " count %x%08x\n", s->limit,
+ s->counthigh, s->count);
+ s->count = count & TIMER_COUNT_MASK32;
s->counthigh = count >> 32;
}
@@ -95,7 +113,7 @@ static void slavio_timer_irq(void *opaque)
slavio_timer_get_out(s);
DPRINTF("callback: count %x%08x\n", s->counthigh, s->count);
if (!slavio_timer_is_user(s)) {
- s->reached = 0x80000000;
+ s->reached = TIMER_REACHED;
qemu_irq_raise(s->irq);
}
}
@@ -107,7 +125,7 @@ static uint32_t slavio_timer_mem_readl(void *opaque, target_phys_addr_t addr)
saddr = (addr & TIMER_MAXADDR) >> 2;
switch (saddr) {
- case 0:
+ case TIMER_LIMIT:
// read limit (system counter mode) or read most signifying
// part of counter (user mode)
if (slavio_timer_is_user(s)) {
@@ -119,24 +137,24 @@ static uint32_t slavio_timer_mem_readl(void *opaque, target_phys_addr_t addr)
// clear irq
qemu_irq_lower(s->irq);
s->reached = 0;
- ret = s->limit & 0x7fffffff;
+ ret = s->limit & TIMER_LIMIT_MASK32;
}
break;
- case 1:
+ case TIMER_COUNTER:
// read counter and reached bit (system mode) or read lsbits
// of counter (user mode)
slavio_timer_get_out(s);
if (slavio_timer_is_user(s)) // read user timer LSW
- ret = s->count & 0xfffffe00;
+ ret = s->count & TIMER_COUNT_MASK32;
else // read limit
- ret = (s->count & 0x7ffffe00) | s->reached;
+ ret = (s->count & TIMER_MAX_COUNT32) | s->reached;
break;
- case 3:
+ case TIMER_STATUS:
// only available in processor counter/timer
// read start/stop status
ret = s->running;
break;
- case 4:
+ case TIMER_MODE:
// only available in system counter
// read user/system mode
ret = s->slave_mode;
@@ -151,7 +169,8 @@ static uint32_t slavio_timer_mem_readl(void *opaque, target_phys_addr_t addr)
return ret;
}
-static void slavio_timer_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+static void slavio_timer_mem_writel(void *opaque, target_phys_addr_t addr,
+ uint32_t val)
{
SLAVIO_TIMERState *s = opaque;
uint32_t saddr;
@@ -160,40 +179,40 @@ static void slavio_timer_mem_writel(void *opaque, target_phys_addr_t addr, uint3
DPRINTF("write " TARGET_FMT_plx " %08x\n", addr, val);
saddr = (addr & TIMER_MAXADDR) >> 2;
switch (saddr) {
- case 0:
+ case TIMER_LIMIT:
if (slavio_timer_is_user(s)) {
// set user counter MSW, reset counter
qemu_irq_lower(s->irq);
- s->limit = 0x7ffffffffffffe00ULL;
+ s->limit = TIMER_MAX_COUNT64;
DPRINTF("processor %d user timer reset\n", s->slave_index);
- ptimer_set_limit(s->timer, s->limit >> 9, 1);
+ ptimer_set_limit(s->timer, LIMIT_TO_PERIODS(s->limit), 1);
} else {
// set limit, reset counter
qemu_irq_lower(s->irq);
- s->limit = val & 0x7ffffe00ULL;
+ s->limit = val & TIMER_MAX_COUNT32;
if (!s->limit)
- s->limit = 0x7ffffe00ULL;
+ s->limit = TIMER_MAX_COUNT32;
ptimer_set_limit(s->timer, s->limit >> 9, 1);
}
break;
- case 1:
+ case TIMER_COUNTER:
if (slavio_timer_is_user(s)) {
// set user counter LSW, reset counter
qemu_irq_lower(s->irq);
- s->limit = 0x7ffffffffffffe00ULL;
+ s->limit = TIMER_MAX_COUNT64;
DPRINTF("processor %d user timer reset\n", s->slave_index);
- ptimer_set_limit(s->timer, s->limit >> 9, 1);
+ ptimer_set_limit(s->timer, LIMIT_TO_PERIODS(s->limit), 1);
} else
DPRINTF("not user timer\n");
break;
- case 2:
+ case TIMER_COUNTER_NORST:
// set limit without resetting counter
- s->limit = val & 0x7ffffe00ULL;
+ s->limit = val & TIMER_MAX_COUNT32;
if (!s->limit)
- s->limit = 0x7ffffe00ULL;
- ptimer_set_limit(s->timer, s->limit >> 9, reload);
+ s->limit = TIMER_MAX_COUNT32;
+ ptimer_set_limit(s->timer, LIMIT_TO_PERIODS(s->limit), reload);
break;
- case 3:
+ case TIMER_STATUS:
if (slavio_timer_is_user(s)) {
// start/stop user counter
if ((val & 1) && !s->running) {
@@ -207,7 +226,7 @@ static void slavio_timer_mem_writel(void *opaque, target_phys_addr_t addr, uint3
}
}
break;
- case 4:
+ case TIMER_MODE:
if (s->master == NULL) {
unsigned int i;
@@ -218,8 +237,10 @@ static void slavio_timer_mem_writel(void *opaque, target_phys_addr_t addr, uint3
}
if ((val & (1 << i)) != (s->slave_mode & (1 << i))) {
ptimer_stop(s->slave[i]->timer);
- ptimer_set_limit(s->slave[i]->timer, s->slave[i]->limit >> 9, 1);
- DPRINTF("processor %d timer changed\n", s->slave[i]->slave_index);
+ ptimer_set_limit(s->slave[i]->timer,
+ LIMIT_TO_PERIODS(s->slave[i]->limit), 1);
+ DPRINTF("processor %d timer changed\n",
+ s->slave[i]->slave_index);
ptimer_run(s->slave[i]->timer, 0);
}
}
@@ -284,12 +305,12 @@ static void slavio_timer_reset(void *opaque)
SLAVIO_TIMERState *s = opaque;
if (slavio_timer_is_user(s))
- s->limit = 0x7ffffffffffffe00ULL;
+ s->limit = TIMER_MAX_COUNT64;
else
- s->limit = 0x7ffffe00ULL;
+ s->limit = TIMER_MAX_COUNT32;
s->count = 0;
s->reached = 0;
- ptimer_set_limit(s->timer, s->limit >> 9, 1);
+ ptimer_set_limit(s->timer, LIMIT_TO_PERIODS(s->limit), 1);
ptimer_run(s->timer, 0);
s->running = 1;
qemu_irq_lower(s->irq);
@@ -312,15 +333,18 @@ static SLAVIO_TIMERState *slavio_timer_init(target_phys_addr_t addr,
s->slave_index = slave_index;
bh = qemu_bh_new(slavio_timer_irq, s);
s->timer = ptimer_init(bh);
- ptimer_set_period(s->timer, 500ULL);
+ ptimer_set_period(s->timer, TIMER_PERIOD);
slavio_timer_io_memory = cpu_register_io_memory(0, slavio_timer_mem_read,
slavio_timer_mem_write, s);
if (master)
- cpu_register_physical_memory(addr, CPU_TIMER_SIZE, slavio_timer_io_memory);
+ cpu_register_physical_memory(addr, CPU_TIMER_SIZE,
+ slavio_timer_io_memory);
else
- cpu_register_physical_memory(addr, SYS_TIMER_SIZE, slavio_timer_io_memory);
- register_savevm("slavio_timer", addr, 2, slavio_timer_save, slavio_timer_load, s);
+ cpu_register_physical_memory(addr, SYS_TIMER_SIZE,
+ slavio_timer_io_memory);
+ register_savevm("slavio_timer", addr, 2, slavio_timer_save,
+ slavio_timer_load, s);
qemu_register_reset(slavio_timer_reset, s);
slavio_timer_reset(s);
@@ -333,11 +357,11 @@ void slavio_timer_init_all(target_phys_addr_t base, qemu_irq master_irq,
SLAVIO_TIMERState *master;
unsigned int i;
- master = slavio_timer_init(base + 0x10000ULL, master_irq, NULL, 0);
+ master = slavio_timer_init(base + SYS_TIMER_OFFSET, master_irq, NULL, 0);
for (i = 0; i < MAX_CPUS; i++) {
master->slave[i] = slavio_timer_init(base + (target_phys_addr_t)
- (i * TARGET_PAGE_SIZE),
+ CPU_TIMER_OFFSET(i),
cpu_irqs[i], master, i);
}
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-27 03:52:50 +0000