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cpu/x86/lapic: Add lapic_busy() helper

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Change-Id: Ife127d6dc8241cccb9d52236a9152da707f0e261
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55191
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Wonkyu Kim <wonkyu.kim@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Arthur Heymans 2021-05-21 09:32:45 +02:00 • committed by Kyösti Mälkki
commit a4ceba4ae5
3 changed files with 20 additions and 12 deletions
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12
src/include/cpu/x86/lapic.h
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@ -35,6 +35,11 @@ static __always_inline void xapic_send_ipi(uint32_t icrlow, uint32_t apicid)
xapic_write_atomic(LAPIC_ICR, icrlow);
}
static __always_inline int xapic_busy(void)
{
return xapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY;
}
#define lapic_read_around(x) lapic_read(x)
#define lapic_write_around(x, y) xapic_write_atomic((x), (y))
@ -124,9 +129,12 @@ static __always_inline void lapic_send_ipi(uint32_t icrlow, uint32_t apicid)
xapic_send_ipi(icrlow, apicid);
}
static __always_inline void lapic_wait_icr_idle(void)
static __always_inline int lapic_busy(void)
{
do { } while (lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY);
if (is_x2apic_mode())
return 0;
else
return xapic_busy();
}
static __always_inline unsigned int initial_lapicid(void)