| 0,0 → 1,427 |
|---|
| /* |
| * 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. |
| */ |
| |
| #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; |
| waitq_t kmp_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 */ |