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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/panic.h>
#include <sys/syslog.h>
#include <dev/acpi/acpi.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/tables.h>
#include <machine/ioapic.h>
#define pr_trace(fmt, ...) kprintf("acpi: " fmt, ##__VA_ARGS__)
int
acpi_init_madt(void)
{
struct acpi_madt *madt = acpi_query("APIC");
struct apic_header *apichdr;
struct ioapic *ioapic = NULL;
uint8_t *cur, *end;
if (madt == NULL) {
panic("Could not find MADT!\n");
}
cur = (uint8_t *)(madt + 1);
end = (uint8_t *)madt + madt->hdr.length;
while (cur < end) {
apichdr = (void *)cur;
if (apichdr->type == APIC_TYPE_IO_APIC) {
/*
* TODO: Figure out how to use multiple I/O APICs
*/
if (ioapic != NULL) {
pr_trace("Skipping I/O APIC with ID %d\n", ioapic->ioapic_id);
break;
}
ioapic = (struct ioapic *)cur;
pr_trace("Detected I/O APIC (id=%d, gsi_base=%d)\n",
ioapic->ioapic_id, ioapic->gsi_base);
ioapic_init((void *)(uintptr_t)ioapic->ioapic_addr);
}
cur += apichdr->length;
}
return 0;
}
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