int _loapic_init(struct device *unused)
{
ARG_UNUSED(unused);
int32_t loApicMaxLvt; /* local APIC Max LVT */
/* enable the Local APIC */
_loapic_enable();
loApicMaxLvt = (*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_VER) &
LOAPIC_MAXLVT_MASK) >> 16;
/* reset the DFR, TPR, TIMER_CONFIG, and TIMER_ICR */
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_DFR) =
(int)0xffffffff;
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_TPR) = (int)0x0;
*(volatile int *) (CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_TIMER_CONFIG) =
(int)0x0;
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_TIMER_ICR) = (int)0x0;
/* program Local Vector Table for the Virtual Wire Mode */
/* set LINT0: extInt, high-polarity, edge-trigger, not-masked */
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_LINT0) =
(*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_LINT0) &
~(LOAPIC_MODE | LOAPIC_LOW | LOAPIC_LEVEL | LOAPIC_LVT_MASKED)) |
(LOAPIC_EXT | LOAPIC_HIGH | LOAPIC_EDGE);
/* set LINT1: NMI, high-polarity, edge-trigger, not-masked */
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_LINT1) =
(*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_LINT1) &
~(LOAPIC_MODE | LOAPIC_LOW | LOAPIC_LEVEL | LOAPIC_LVT_MASKED)) |
(LOAPIC_NMI | LOAPIC_HIGH | LOAPIC_EDGE);
/* lock the Local APIC interrupts */
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_TIMER) =
LOAPIC_LVT_MASKED;
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_ERROR) =
LOAPIC_LVT_MASKED;
if (loApicMaxLvt >= LOAPIC_LVT_P6)
*(volatile int *) (CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_PMC) =
LOAPIC_LVT_MASKED;
if (loApicMaxLvt >= LOAPIC_LVT_PENTIUM4)
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_THERMAL) =
LOAPIC_LVT_MASKED;
#if CONFIG_LOAPIC_SPURIOUS_VECTOR
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_SVR) =
(*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_SVR) & 0xFFFFFF00)
| (LOAPIC_SPURIOUS_VECTOR_ID & 0xFF);
#endif
/* discard a pending interrupt if any */
_loapic_eoi();
return 0;
}
/**
*
* @brief Send EOI (End Of Interrupt) signal to IO APIC
*
* This routine sends an EOI signal to the IO APIC's interrupting source.
*
* All line interrupts on Quark D2000 are EOI'ed with local APIC EOI register.
*
* @param irq INT number to send EOI
*
* @returns: N/A
*/
void _ioapic_eoi(unsigned int irq)
{
_loapic_eoi();
}
void _ioapic_eoi(unsigned int irq /* INT number to send EOI */
)
{
_loapic_eoi(irq);
}
