/*
* 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 <genarch/acpi/acpi.h>
#include <genarch/acpi/madt.h>
#include <arch/smp/apic.h>
#include <arch/smp/smp.h>
#include <panic.h>
#include <debug.h>
#include <config.h>
#include <print.h>
#include <mm/heap.h>
#include <memstr.h>
#include <sort.h>
struct acpi_madt *acpi_madt = NULL;
#ifdef CONFIG_SMP
static void madt_l_apic_entry(struct madt_l_apic *la, __u32 index);
static void madt_io_apic_entry(struct madt_io_apic *ioa, __u32 index);
static int madt_cmp(void * a, void * b);
struct madt_l_apic *madt_l_apic_entries = NULL;
struct madt_io_apic *madt_io_apic_entries = NULL;
index_t madt_l_apic_entry_index = 0;
index_t madt_io_apic_entry_index = 0;
count_t madt_l_apic_entry_cnt = 0;
count_t madt_io_apic_entry_cnt = 0;
count_t cpu_count = 0;
struct madt_apic_header * * madt_entries_index = NULL;
int madt_entries_index_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 ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->flags & 0x1;
}
static bool madt_cpu_bootstrap(index_t i)
{
ASSERT(i < madt_l_apic_entry_cnt);
return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->apic_id == l_apic_id();
}
static __u8 madt_cpu_apic_id(index_t i)
{
ASSERT(i < madt_l_apic_entry_cnt);
return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->apic_id;
}
int madt_cmp(void * a, void * b)
{
return
(((struct madt_apic_header *) a)->type > ((struct madt_apic_header *) b)->type) ?
1 :
((((struct madt_apic_header *) a)->type < ((struct madt_apic_header *) b)->type) ? -1 : 0);
}
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;
l_apic = (__u32 *) (__native) acpi_madt->l_apic_address;
/* calculate madt entries */
for (h = &acpi_madt->apic_header[0]; h < end; h = (struct madt_apic_header *) (((__u8 *) h) + h->length)) {
madt_entries_index_cnt++;
}
/* create madt apic entries index array */
madt_entries_index
= (struct madt_apic_header
* *) malloc(madt_entries_index_cnt
* sizeof(struct madt_apic_header
* *));
__u32 index = 0;
for (h = &acpi_madt->apic_header[0]; h < end; h = (struct madt_apic_header *) (((__u8 *) h) + h->length)) {
madt_entries_index[index++] = h;
}
/* Quicksort MADT index structure */
qsort(madt_entries_index
, madt_entries_index_cnt
, sizeof(__address
), &madt_cmp
);
/* Parse MADT entries */
for (index = 0; index < madt_entries_index_cnt - 1; index++) {
h = madt_entries_index[index];
switch (h->type) {
case MADT_L_APIC:
madt_l_apic_entry((struct madt_l_apic *) h, index);
break;
case MADT_IO_APIC:
madt_io_apic_entry((struct madt_io_apic *) h, index);
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;
}
}
if (cpu_count)
config.cpu_count = cpu_count;
}
void madt_l_apic_entry(struct madt_l_apic *la, __u32 index)
{
if (!madt_l_apic_entry_cnt++) {
madt_l_apic_entry_index = index;
}
if (!(la->flags & 0x1)) {
/* Processor is unusable, skip it. */
return;
}
cpu_count++;
apic_id_mask |= 1<<la->apic_id;
}
void madt_io_apic_entry(struct madt_io_apic *ioa, __u32 index)
{
if (!madt_io_apic_entry_cnt++) {
/* remember index of the first io apic entry */
madt_io_apic_entry_index = index;
io_apic = (__u32 *) (__native) ioa->io_apic_address;
} else {
/* currently not supported */
return;
}
}
#endif /* CONFIG_SMP */