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small cleanup. Also increased LAPIC timer priority from 2 to 3 (nothing changes yet anyway).

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35662 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini 2010-02-28 17:20:50 +00:00
parent ae6721ad6e
commit 283926fe70
1 changed files with 17 additions and 25 deletions
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40
src/system/kernel/arch/x86/timers/x86_apic.cpp
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@ -20,9 +20,9 @@
/* Method Prototypes */
static int apic_get_prio(void);
static int apic_get_priority();
static status_t apic_set_hardware_timer(bigtime_t relativeTimeout);
static status_t apic_clear_hardware_timer(void);
static status_t apic_clear_hardware_timer();
static status_t apic_init(struct kernel_args *args);
static void *sApicPtr = NULL;
@ -32,7 +32,7 @@ extern bool gUsingIOAPIC;
struct timer_info gAPICTimer = {
"APIC",
&apic_get_prio,
&apic_get_priority,
&apic_set_hardware_timer,
&apic_clear_hardware_timer,
&apic_init
@ -40,9 +40,9 @@ struct timer_info gAPICTimer = {
static int
apic_get_prio(void)
apic_get_priority()
{
return 2;
return 3;
}
@ -77,10 +77,6 @@ apic_timer_interrupt(void *data)
static status_t
apic_set_hardware_timer(bigtime_t relativeTimeout)
{
cpu_status state;
uint32 config;
uint32 ticks;
if (sApicPtr == NULL)
return B_ERROR;
@ -88,11 +84,11 @@ apic_set_hardware_timer(bigtime_t relativeTimeout)
relativeTimeout = MIN_TIMEOUT;
// calculation should be ok, since it's going to be 64-bit
ticks = ((relativeTimeout * sApicTicsPerSec) / 1000000);
uint32 ticks = ((relativeTimeout * sApicTicsPerSec) / 1000000);
state = disable_interrupts();
cpu_status state = disable_interrupts();
config = _apic_read(APIC_LVT_TIMER) | APIC_LVT_MASKED; // mask the timer
uint32 config = _apic_read(APIC_LVT_TIMER) | APIC_LVT_MASKED; // mask the timer
_apic_write(APIC_LVT_TIMER, config);
_apic_write(APIC_INITIAL_TIMER_COUNT, 0); // zero out the timer
@ -112,17 +108,15 @@ apic_set_hardware_timer(bigtime_t relativeTimeout)
static status_t
apic_clear_hardware_timer(void)
apic_clear_hardware_timer()
{
cpu_status state;
uint32 config;
if (sApicPtr == NULL)
return B_ERROR;
state = disable_interrupts();
cpu_status state = disable_interrupts();
config = _apic_read(APIC_LVT_TIMER) | APIC_LVT_MASKED; // mask the timer
uint32 config = _apic_read(APIC_LVT_TIMER) | APIC_LVT_MASKED;
// mask the timer
_apic_write(APIC_LVT_TIMER, config);
_apic_write(APIC_INITIAL_TIMER_COUNT, 0); // zero out the timer
@ -147,22 +141,20 @@ apic_init(struct kernel_args *args)
status_t
apic_init_timer(struct kernel_args *args, int32 cpu)
{
uint32 config;
if (args->arch_args.apic == NULL) {
if (args->arch_args.apic == NULL)
return B_ERROR;
}
/* This is in place of apic_preinit; if we're not already initialized,
register the interrupt handler and set the pointers */
if (sApicPtr == NULL) {
sApicPtr = (void *)args->arch_args.apic;
sApicTicsPerSec = args->arch_args.apic_time_cv_factor;
install_io_interrupt_handler(0xfb - ARCH_INTERRUPT_BASE, &apic_timer_interrupt, NULL, B_NO_LOCK_VECTOR);
install_io_interrupt_handler(0xfb - ARCH_INTERRUPT_BASE,
&apic_timer_interrupt, NULL, B_NO_LOCK_VECTOR);
}
/* setup timer */
config = _apic_read(APIC_LVT_TIMER) & APIC_LVT_TIMER_MASK;
uint32 config = _apic_read(APIC_LVT_TIMER) & APIC_LVT_TIMER_MASK;
config |= 0xfb | APIC_LVT_MASKED; // vector 0xfb, timer masked
_apic_write(APIC_LVT_TIMER, config);