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/*
* Copyright (C) 2001-2005 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.
*/
/** @addtogroup ia32
* @{
*/
/** @file
*/
#ifdef CONFIG_SMP
#include <config.h>
#include <print.h>
#include <debug.h>
#include <arch/smp/mps.h>
#include <arch/smp/apic.h>
#include <arch/smp/smp.h>
#include <func.h>
#include <arch/types.h>
#include <typedefs.h>
#include <cpu.h>
#include <arch/asm.h>
#include <arch/bios/bios.h>
#include <mm/frame.h>
/*
* MultiProcessor Specification detection code.
*/
#define FS_SIGNATURE 0x5f504d5f
#define CT_SIGNATURE 0x504d4350
int mps_fs_check(__u8 *base);
int mps_ct_check(void);
int configure_via_ct(void);
int configure_via_default(__u8 n);
int ct_processor_entry(struct __processor_entry *pr);
void ct_bus_entry(struct __bus_entry *bus);
void ct_io_apic_entry(struct __io_apic_entry *ioa);
void ct_io_intr_entry(struct __io_intr_entry *iointr);
void ct_l_intr_entry(struct __l_intr_entry *lintr);
void ct_extended_entries(void);
static struct mps_fs *fs;
static struct mps_ct *ct;
struct __processor_entry *processor_entries = NULL;
struct __bus_entry *bus_entries = NULL;
struct __io_apic_entry *io_apic_entries = NULL;
struct __io_intr_entry *io_intr_entries = NULL;
struct __l_intr_entry *l_intr_entries = NULL;
int processor_entry_cnt = 0;
int bus_entry_cnt = 0;
int io_apic_entry_cnt = 0;
int io_intr_entry_cnt = 0;
int l_intr_entry_cnt = 0;
waitq_t ap_completion_wq;
/*
* Implementation of IA-32 SMP configuration interface.
*/
static count_t get_cpu_count(void);
static bool is_cpu_enabled(index_t i);
static bool is_bsp(index_t i);
static __u8 get_cpu_apic_id(index_t i);
static int mps_irq_to_pin(int irq);
struct smp_config_operations mps_config_operations = {
.cpu_count = get_cpu_count,
.cpu_enabled = is_cpu_enabled,
.cpu_bootstrap = is_bsp,
.cpu_apic_id = get_cpu_apic_id,
.irq_to_pin = mps_irq_to_pin
};
count_t get_cpu_count(void)
{
return processor_entry_cnt;
}
bool is_cpu_enabled(index_t i)
{
ASSERT(i < processor_entry_cnt);
return processor_entries[i].cpu_flags & 0x1;
}
bool is_bsp(index_t i)
{
ASSERT(i < processor_entry_cnt);
return processor_entries[i].cpu_flags & 0x2;
}
__u8 get_cpu_apic_id(index_t i)
{
ASSERT(i < processor_entry_cnt);
return processor_entries[i].l_apic_id;
}
/*
* Used to check the integrity of the MP Floating Structure.
*/
int mps_fs_check(__u8 *base)
{
int i;
__u8 sum;
for (i = 0, sum = 0; i < 16; i++)
sum += base[i];
return !sum;
}
/*
* Used to check the integrity of the MP Configuration Table.
*/
int mps_ct_check(void)
{
__u8 *base = (__u8 *) ct;
__u8 *ext = base + ct->base_table_length;
__u8 sum;
int i;
/* count the checksum for the base table */
for (i=0,sum=0; i < ct->base_table_length; i++)
sum += base[i];
if (sum)
return 0;
/* count the checksum for the extended table */
for (i=0,sum=0; i < ct->ext_table_length; i++)
sum += ext[i];
return sum == ct->ext_table_checksum;
}
void mps_init(void)
{
__u8 *addr[2] = { NULL, (__u8 *) PA2KA(0xf0000) };
int i, j, length[2] = { 1024, 64*1024 };
/*
* Find MP Floating Pointer Structure
* 1a. search first 1K of EBDA
* 1b. if EBDA is undefined, search last 1K of base memory
* 2. search 64K starting at 0xf0000
*/
addr[0] = (__u8 *) PA2KA(ebda ? ebda : 639 * 1024);
for (i = 0; i < 2; i++) {
for (j = 0; j < length[i]; j += 16) {
if (*((__u32 *) &addr[i][j]) == FS_SIGNATURE && mps_fs_check(&addr[i][j])) {
fs = (struct mps_fs *) &addr[i][j];
goto fs_found;
}
}
}
return;
fs_found:
printf("%p: MPS Floating Pointer Structure\n", fs);
if (fs->config_type == 0 && fs->configuration_table) {
if (fs->mpfib2 >> 7) {
printf("%s: PIC mode not supported\n", __FUNCTION__);
return;
}
ct = (struct mps_ct *)PA2KA((__address)fs->configuration_table);
config.cpu_count = configure_via_ct();
}
else
config.cpu_count = configure_via_default(fs->config_type);
return;
}
int configure_via_ct(void)
{
__u8 *cur;
int i, cnt;
if (ct->signature != CT_SIGNATURE) {
printf("%s: bad ct->signature\n", __FUNCTION__);
return 1;
}
if (!mps_ct_check()) {
printf("%s: bad ct checksum\n", __FUNCTION__);
return 1;
}
if (ct->oem_table) {
printf("%s: ct->oem_table not supported\n", __FUNCTION__);
return 1;
}
l_apic = (__u32 *)(__address)ct->l_apic;
cnt = 0;
cur = &ct->base_table[0];
for (i=0; i < ct->entry_count; i++) {
switch (*cur) {
/* Processor entry */
case 0:
processor_entries = processor_entries ? processor_entries : (struct __processor_entry *) cur;
processor_entry_cnt++;
cnt += ct_processor_entry((struct __processor_entry *) cur);
cur += 20;
break;
/* Bus entry */
case 1:
bus_entries = bus_entries ? bus_entries : (struct __bus_entry *) cur;
bus_entry_cnt++;
ct_bus_entry((struct __bus_entry *) cur);
cur += 8;
break;
/* I/O Apic */
case 2:
io_apic_entries = io_apic_entries ? io_apic_entries : (struct __io_apic_entry *) cur;
io_apic_entry_cnt++;
ct_io_apic_entry((struct __io_apic_entry *) cur);
cur += 8;
break;
/* I/O Interrupt Assignment */
case 3:
io_intr_entries = io_intr_entries ? io_intr_entries : (struct __io_intr_entry *) cur;
io_intr_entry_cnt++;
ct_io_intr_entry((struct __io_intr_entry *) cur);
cur += 8;
break;
/* Local Interrupt Assignment */
case 4:
l_intr_entries = l_intr_entries ? l_intr_entries : (struct __l_intr_entry *) cur;
l_intr_entry_cnt++;
ct_l_intr_entry((struct __l_intr_entry *) cur);
cur += 8;
break;
default:
/*
* Something is wrong. Fallback to UP mode.
*/
printf("%s: ct badness\n", __FUNCTION__);
return 1;
}
}
/*
* Process extended entries.
*/
ct_extended_entries();
return cnt;
}
int configure_via_default(__u8 n)
{
/*
* Not yet implemented.
*/
printf("%s: not supported\n", __FUNCTION__);
return 1;
}
int ct_processor_entry(struct __processor_entry *pr)
{
/*
* Ignore processors which are not marked enabled.
*/
if ((pr->cpu_flags & (1<<0)) == 0)
return 0;
apic_id_mask |= (1<<pr->l_apic_id);
return 1;
}
void ct_bus_entry(struct __bus_entry *bus)
{
#ifdef MPSCT_VERBOSE
char buf[7];
memcpy((void *) buf, (void *) bus->bus_type, 6);
buf[6] = 0;
printf("bus%d: %s\n", bus->bus_id, buf);
#endif
}
void ct_io_apic_entry(struct __io_apic_entry *ioa)
{
static int io_apic_count = 0;
/* this ioapic is marked unusable */
if ((ioa->io_apic_flags & 1) == 0)
return;
if (io_apic_count++ > 0) {
/*
* Multiple IO APIC's are currently not supported.
*/
return;
}
io_apic = (__u32 *)(__address)ioa->io_apic;
}
//#define MPSCT_VERBOSE
void ct_io_intr_entry(struct __io_intr_entry *iointr)
{
#ifdef MPSCT_VERBOSE
switch (iointr->intr_type) {
case 0: printf("INT"); break;
case 1: printf("NMI"); break;
case 2: printf("SMI"); break;
case 3: printf("ExtINT"); break;
}
putchar(',');
switch (iointr->poel&3) {
case 0: printf("bus-like"); break;
case 1: printf("active high"); break;
case 2: printf("reserved"); break;
case 3: printf("active low"); break;
}
putchar(',');
switch ((iointr->poel>>2)&3) {
case 0: printf("bus-like"); break;
case 1: printf("edge-triggered"); break;
case 2: printf("reserved"); break;
case 3: printf("level-triggered"); break;
}
putchar(',');
printf("bus%d,irq%d", iointr->src_bus_id, iointr->src_bus_irq);
putchar(',');
printf("io_apic%d,pin%d", iointr->dst_io_apic_id, iointr->dst_io_apic_pin);
putchar('\n');
#endif
}
void ct_l_intr_entry(struct __l_intr_entry *lintr)
{
#ifdef MPSCT_VERBOSE
switch (lintr->intr_type) {
case 0: printf("INT"); break;
case 1: printf("NMI"); break;
case 2: printf("SMI"); break;
case 3: printf("ExtINT"); break;
}
putchar(',');
switch (lintr->poel&3) {
case 0: printf("bus-like"); break;
case 1: printf("active high"); break;
case 2: printf("reserved"); break;
case 3: printf("active low"); break;
}
putchar(',');
switch ((lintr->poel>>2)&3) {
case 0: printf("bus-like"); break;
case 1: printf("edge-triggered"); break;
case 2: printf("reserved"); break;
case 3: printf("level-triggered"); break;
}
putchar(',');
printf("bus%d,irq%d", lintr->src_bus_id, lintr->src_bus_irq);
putchar(',');
printf("l_apic%d,pin%d", lintr->dst_l_apic_id, lintr->dst_l_apic_pin);
putchar('\n');
#endif
}
void ct_extended_entries(void)
{
__u8 *ext = (__u8 *) ct + ct->base_table_length;
__u8 *cur;
for (cur = ext; cur < ext + ct->ext_table_length; cur += cur[CT_EXT_ENTRY_LEN]) {
switch (cur[CT_EXT_ENTRY_TYPE]) {
default:
printf("%p: skipping MP Configuration Table extended entry type %d\n", cur, cur[CT_EXT_ENTRY_TYPE]);
break;
}
}
}
int mps_irq_to_pin(int irq)
{
int i;
for(i=0;i<io_intr_entry_cnt;i++) {
if (io_intr_entries[i].src_bus_irq == irq && io_intr_entries[i].intr_type == 0)
return io_intr_entries[i].dst_io_apic_pin;
}
return -1;
}
#endif /* CONFIG_SMP */
/** @}
*/