/*
* Copyright (C) 2005 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <arch/types.h>
#include <typedefs.h>
#include <arch/acpi/acpi.h>
#include <arch/acpi/madt.h>
#include <arch/smp/apic.h>
#include <arch/smp/smp.h>
#include <mm/page.h>
#include <panic.h>
#include <debug.h>
#include <config.h>
struct acpi_madt *acpi_madt = NULL;
#ifdef __SMP__
/*
* NOTE: it is currently not completely clear to the authors of SPARTAN whether
* MADT can exist in such a form that entries of the same type are not consecutive.
* Because of this uncertainity, some entry types are explicitly checked for
* being consecutive with other entries of the same kind.
*/
static void madt_l_apic_entry(struct madt_l_apic *la, __u8 prev_type);
static void madt_io_apic_entry(struct madt_io_apic *ioa, __u8 prev_type);
struct madt_l_apic *madt_l_apic_entries = NULL;
struct madt_io_apic *madt_io_apic_entries = NULL;
int madt_l_apic_entry_cnt = 0;
int madt_io_apic_entry_cnt = 0;
char *entry[] = {
"L_APIC",
"IO_APIC",
"INTR_SRC_OVRD",
"NMI_SRC",
"L_APIC_NMI",
"L_APIC_ADDR_OVRD",
"IO_SAPIC",
"L_SAPIC",
"PLATFORM_INTR_SRC"
};
/*
* ACPI MADT Implementation of SMP configuration interface.
*/
static count_t madt_cpu_count(void);
static bool madt_cpu_enabled(index_t i);
static bool madt_cpu_bootstrap(index_t i);
static __u8 madt_cpu_apic_id(index_t i);
struct smp_config_operations madt_config_operations = {
.cpu_count = madt_cpu_count,
.cpu_enabled = madt_cpu_enabled,
.cpu_bootstrap = madt_cpu_bootstrap,
.cpu_apic_id = madt_cpu_apic_id
};
static count_t madt_cpu_count(void)
{
return madt_l_apic_entry_cnt;
}
static bool madt_cpu_enabled(index_t i)
{
ASSERT(i < madt_l_apic_entry_cnt);
return madt_l_apic_entries[i].flags & 0x1;
}
static bool madt_cpu_bootstrap(index_t i)
{
ASSERT(i < madt_l_apic_entry_cnt);
return madt_l_apic_entries[i].apic_id == l_apic_id();
}
static __u8 madt_cpu_apic_id(index_t i)
{
ASSERT(i < madt_l_apic_entry_cnt);
return madt_l_apic_entries[i].apic_id;
}
void acpi_madt_parse(void)
{
struct madt_apic_header *end = (struct madt_apic_header *) (((__u8 *) acpi_madt) + acpi_madt->header.length);
struct madt_apic_header *h = &acpi_madt->apic_header[0];
__u8 prev_type = 0; /* used to detect incosecutive entries */
l_apic = (__u32 *) acpi_madt->l_apic_address;
while (h < end) {
switch (h->type) {
case MADT_L_APIC:
madt_l_apic_entry((struct madt_l_apic *) h, prev_type);
break;
case MADT_IO_APIC:
madt_io_apic_entry((struct madt_io_apic *) h, prev_type);
break;
case MADT_INTR_SRC_OVRD:
case MADT_NMI_SRC:
case MADT_L_APIC_NMI:
case MADT_L_APIC_ADDR_OVRD:
case MADT_IO_SAPIC:
case MADT_L_SAPIC:
case MADT_PLATFORM_INTR_SRC:
printf("MADT: skipping %s entry (type=%d)\n", entry
[h
->type
], h
->type
); break;
default:
if (h->type >= MADT_RESERVED_SKIP_BEGIN && h->type <= MADT_RESERVED_SKIP_END) {
printf("MADT: skipping reserved entry (type=%d)\n", h
->type
); }
if (h->type >= MADT_RESERVED_OEM_BEGIN) {
printf("MADT: skipping OEM entry (type=%d)\n", h
->type
); }
break;
}
prev_type = h->type;
h = (struct madt_apic_header *) (((__u8 *) h) + h->length);
}
if (madt_l_apic_entry_cnt)
config.cpu_count = madt_l_apic_entry_cnt;
}
void madt_l_apic_entry(struct madt_l_apic *la, __u8 prev_type)
{
/* check for consecutiveness */
if (madt_l_apic_entry_cnt && prev_type != MADT_L_APIC)
panic("%s entries are not consecuitve\n", entry[MADT_L_APIC]);
if (!madt_l_apic_entry_cnt++)
madt_l_apic_entries = la;
if (!(la->flags & 0x1)) {
/* Processor is unusable, skip it. */
return;
}
apic_id_mask |= 1<<la->apic_id;
}
void madt_io_apic_entry(struct madt_io_apic *ioa, __u8 prev_type)
{
/* check for consecutiveness */
if (madt_io_apic_entry_cnt && prev_type != MADT_IO_APIC)
panic("%s entries are not consecuitve\n", entry[MADT_IO_APIC]);
if (!madt_io_apic_entry_cnt++) {
madt_io_apic_entries = ioa;
io_apic = (__u32 *) ioa->io_apic_address;
map_page_to_frame((__address) io_apic, (__address) io_apic, PAGE_NOT_CACHEABLE, 0);
}
else {
/* currently not supported */
return;
}
}
#endif /* __SMP__ */