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loapic: get rid of function call overhead for _loapic_eoi()

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We generally call this in interrupt code, and since it's just a register
write, get rid of all the function call overhead.

Change-Id: I251fa3cee0841fcdd8eecc7941d4d3782d112e66
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2015-11-04 13:47:12 -08:00 • committed by Anas Nashif
commit 5e1ae08765
2 changed files with 23 additions and 24 deletions
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30
include/drivers/loapic.h
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@ -55,30 +55,44 @@ extern "C" {
#define LOAPIC_LVT_MASKED 0x00010000 /* mask */
#ifdef _ASMLANGUAGE
GTEXT(_loapic_eoi)
loapic_eoi = (CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_EOI)
.macro loapic_mkstub device isr context
GTEXT(_\()\device\()_\()\isr\()_stub)
SECTION_FUNC(TEXT, _\()\device\()_\()\isr\()_stub)
call _IntEnt /* Inform kernel interrupt has begun */
pushl \context /* Push context parameter */
call \isr /* Call actual interrupt handler */
popl %eax /* Clean-up stack from push above */
call _loapic_eoi /* Inform loapic interrupt is done */
jmp _IntExit /* Inform kernel interrupt is done */
call _IntEnt /* Inform kernel interrupt has begun */
pushl \context /* Push context parameter */
call \isr /* Call actual interrupt handler */
popl %eax /* Clean-up stack from push above */
xorl %eax, %eax
movl %eax, loapic_eoi /* Inform loapic interrupt is done */
jmp _IntExit /* Inform kernel interrupt is done */
.endm
#else /* _ASMLANGUAGE */
#include <device.h>
extern int _loapic_init(struct device *unused);
extern void _loapic_eoi(void);
extern void _loapic_int_vec_set(unsigned int irq, unsigned int vector);
extern void loapic_int_vec_trigger(unsigned int vector);
extern void _loapic_irq_enable(unsigned int irq);
extern void _loapic_irq_disable(unsigned int irq);
extern void _loapic_enable(void);
extern void _loapic_disable(void);
/**
*
* @brief send EOI (End Of Interrupt) signal to Local APIC
*
* This routine sends an EOI signal to the Local APIC's interrupting source.
*
* @return N/A
*/
static inline void _loapic_eoi(void)
{
*(volatile int *)(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_EOI) = 0;
}
#endif /* _ASMLANGUAGE */
#ifdef __cplusplus