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Use B_DO_NOT_RESCHEDULE in the interrupt handler because we are running

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with the interrupts disabled (was causing KDL under qemu).
Add a define to switch the HPET timers to 32 or 64 bit (32 bit now by default)
Reordered some things
Add some debug output. 


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42881 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini 2011-10-19 11:11:53 +00:00
parent 9774c58f55
commit bcf13367d4
1 changed files with 28 additions and 11 deletions
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39
src/add-ons/kernel/drivers/timer/hpet.cpp
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@ -26,7 +26,7 @@
#endif
#define TEST_HPET
#define HPET64 0
static struct hpet_regs *sHPETRegs;
static uint64 sHPETPeriod;
@ -75,7 +75,11 @@ static vint32 sOpenCount;
static inline bigtime_t
hpet_convert_timeout(const bigtime_t &relativeTimeout)
{
#if HPET64
bigtime_t counter = sHPETRegs->u0.counter64;
#else
bigtime_t counter = sHPETRegs->u0.counter32;
#endif
bigtime_t converted = (1000000000ULL / sHPETPeriod) * relativeTimeout;
dprintf("counter: %lld, relativeTimeout: %lld, converted: %lld\n",
@ -85,7 +89,7 @@ hpet_convert_timeout(const bigtime_t &relativeTimeout)
}
#define MIN_TIMEOUT 3000
#define MIN_TIMEOUT 1
static status_t
hpet_set_hardware_timer(bigtime_t relativeTimeout, volatile hpet_timer *timer)
@ -98,7 +102,11 @@ hpet_set_hardware_timer(bigtime_t relativeTimeout, volatile hpet_timer *timer)
//dprintf("comparator: %lld, new value: %lld\n", timer->u0.comparator64, timerValue);
#if HPET64
timer->u0.comparator64 = timerValue;
#else
timer->u0.comparator32 = timerValue;
#endif
// enable timer interrupt
timer->config |= HPET_CONF_TIMER_INT_ENABLE;
@ -128,7 +136,7 @@ hpet_timer_interrupt(void *arg)
sHPETRegs->interrupt_status |= intStatus;
hpet_clear_hardware_timer(&sHPETRegs->timer[hpetCookie->number]);
release_sem(hpetCookie->sem);
release_sem_etc(hpetCookie->sem, 1, B_DO_NOT_RESCHEDULE);
return B_HANDLED_INTERRUPT;
}
@ -221,18 +229,25 @@ hpet_init_timer(hpet_timer_cookie* cookie)
if (interrupt == -1)
return B_ERROR;
timer->config |= (interrupt << HPET_CONF_TIMER_INT_ROUTE_SHIFT)
& HPET_CONF_TIMER_INT_ROUTE_MASK;
// Non-periodic mode
timer->config &= ~HPET_CONF_TIMER_TYPE;
// level triggered
timer->config |= HPET_CONF_TIMER_INT_TYPE;
// Disable FSB/MSI, enable 64 bit mode
// Disable FSB/MSI
timer->config &= ~HPET_CONF_TIMER_FSB_ENABLE;
#if HPET64
//disable 32 bit mode
timer->config &= ~HPET_CONF_TIMER_32MODE;
#else
//enable 32 bit mode
timer->config |= HPET_CONF_TIMER_32MODE;
#endif
timer->config |= (interrupt << HPET_CONF_TIMER_INT_ROUTE_SHIFT)
& HPET_CONF_TIMER_INT_ROUTE_MASK;
cookie->irq = interrupt = HPET_GET_CONF_TIMER_INT_ROUTE(timer);
status_t status = install_io_interrupt_handler(interrupt, &hpet_timer_interrupt, cookie, 0);
@ -250,9 +265,9 @@ hpet_init_timer(hpet_timer_cookie* cookie)
static status_t
hpet_test()
{
uint64 initialValue = sHPETRegs->u0.counter64;
uint64 initialValue = sHPETRegs->u0.counter32;
spin(10);
uint64 finalValue = sHPETRegs->u0.counter64;
uint64 finalValue = sHPETRegs->u0.counter32;
if (initialValue == finalValue) {
dprintf("hpet_test: counter does not increment\n");
@ -271,9 +286,11 @@ hpet_init()
sHPETPeriod = HPET_GET_PERIOD(sHPETRegs);
TRACE(("hpet_init: HPET is at %p.\n\tVendor ID: %llx, rev: %llx, period: %lld\n",
TRACE(("hpet_init: HPET is at %p.\n"
"\tVendor ID: %llx, rev: %llx, period: %lld\n"
"\tin legacy mode: %s\n",
sHPETRegs, HPET_GET_VENDOR_ID(sHPETRegs), HPET_GET_REVID(sHPETRegs),
sHPETPeriod));
sHPETPeriod, sHPETRegs->config & HPET_CONF_MASK_LEGACY ? "yes" : "no"));
status_t status = hpet_set_enabled(false);
if (status != B_OK)