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/* SPDX-License-Identifier: GPL-2.0-only */
#include <cpu/x86/lapic.h>
#include <console/console.h>
#if !CONFIG(XAPIC_ONLY)
#error "BUG: lapic_write_around() needs to be fixed for X2APIC."
#endif
void lapic_virtual_wire_mode_init(void)
{
/* this is so interrupts work. This is very limited scope --
* linux will do better later, we hope ...
*/
/* this is the first way we learned to do it. It fails on real SMP
* stuff. So we have to do things differently ...
* see the Intel mp1.4 spec, page A-3
*/
printk(BIOS_INFO, "Setting up local APIC...\n");
/* Enable the local APIC */
enable_lapic();
/*
* Set Task Priority to 'accept all'.
*/
lapic_write_around(LAPIC_TASKPRI,
lapic_read_around(LAPIC_TASKPRI) & ~LAPIC_TPRI_MASK);
/* Put the local APIC in virtual wire mode */
lapic_write_around(LAPIC_SPIV,
(lapic_read_around(LAPIC_SPIV) & ~(LAPIC_VECTOR_MASK))
| LAPIC_SPIV_ENABLE);
lapic_write_around(LAPIC_LVT0,
(lapic_read_around(LAPIC_LVT0) &
~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER |
LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY |
LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 |
LAPIC_DELIVERY_MODE_MASK))
| (LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING |
LAPIC_DELIVERY_MODE_EXTINT)
);
lapic_write_around(LAPIC_LVT1,
(lapic_read_around(LAPIC_LVT1) &
~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER |
LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY |
LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 |
LAPIC_DELIVERY_MODE_MASK))
| (LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING |
LAPIC_DELIVERY_MODE_NMI)
);
printk(BIOS_DEBUG, " apic_id: 0x%x ", lapicid());
printk(BIOS_INFO, "done.\n");
}
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