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cpu/x86/lapic: Add lapic_send_ipi() helper

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Change-Id: I7207a9aadd987b4307ce8b3dd8dbfd47d0a5768e
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/+/55190
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 6f77ff7ba5
3 changed files with 26 additions and 40 deletions
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15
src/include/cpu/x86/lapic.h
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@ -29,10 +29,15 @@ static inline void xapic_write_atomic(unsigned long reg, uint32_t v)
: : "memory", "cc");
}
static __always_inline void xapic_send_ipi(uint32_t icrlow, uint32_t apicid)
{
xapic_write_atomic(LAPIC_ICR2, SET_LAPIC_DEST_FIELD(apicid));
xapic_write_atomic(LAPIC_ICR, icrlow);
}
#define lapic_read_around(x) lapic_read(x)
#define lapic_write_around(x, y) xapic_write_atomic((x), (y))
static __always_inline uint32_t x2apic_read(unsigned int reg)
{
uint32_t value, index;
@ -111,6 +116,14 @@ static __always_inline void lapic_update32(unsigned int reg, uint32_t mask, uint
}
}
static __always_inline void lapic_send_ipi(uint32_t icrlow, uint32_t apicid)
{
if (is_x2apic_mode())
x2apic_send_ipi(icrlow, apicid);
else
xapic_send_ipi(icrlow, apicid);
}
static __always_inline void lapic_wait_icr_idle(void)
{
do { } while (lapic_read(LAPIC_ICR) & LAPIC_ICR_BUSY);