| 0,0 → 1,533 |
|---|
| /* |
| * Copyright (C) 2001-2004 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 __SMP__ |
| |
| #include <arch/mp.h> |
| #include <arch/ap.h> |
| #include <arch/pm.h> |
| #include <config.h> |
| #include <print.h> |
| #include <panic.h> |
| #include <arch/apic.h> |
| #include <func.h> |
| #include <arch/types.h> |
| #include <typedefs.h> |
| #include <synch/waitq.h> |
| #include <time/delay.h> |
| #include <mm/heap.h> |
| #include <mm/page.h> |
| #include <mm/frame.h> |
| #include <cpu.h> |
| #include <arch/i8259.h> |
| #include <arch/asm.h> |
| |
| /* |
| * Multi-Processor Specification detection code. |
| */ |
| |
| #define FS_SIGNATURE 0x5f504d5f |
| #define CT_SIGNATURE 0x504d4350 |
| |
| int mp_fs_check(__u8 *base); |
| int mp_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 __mpfs *fs; |
| static struct __mpct *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; |
| |
| /* |
| * Used to check the integrity of the MP Floating Structure. |
| */ |
| int mp_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 mp_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; |
| } |
| |
| void mp_init(void) |
| { |
| __address addr, frame; |
| int cnt, n; |
| |
| |
| /* |
| * First place to search the MP Floating Pointer Structure is the Extended |
| * BIOS Data Area. We have to read EBDA segment address from the BIOS Data |
| * Area. Unfortunatelly, this memory is in page 0, which has intentionally no |
| * mapping. |
| */ |
| frame = frame_alloc(FRAME_KA); |
| map_page_to_frame(frame,0,PAGE_CACHEABLE,0); |
| addr = *((__u16 *) (frame + 0x40e)) * 16; |
| map_page_to_frame(frame,frame,PAGE_CACHEABLE,0); |
| frame_free(frame); |
| |
| /* |
| * EBDA can be undefined. In that case addr would be 0. |
| */ |
| if (addr >= 0x1000) { |
| cnt = 1024; |
| while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
| if (mp_fs_check((__u8 *) addr)) |
| goto fs_found; |
| addr++; |
| cnt--; |
| } |
| } |
| |
| /* |
| * Second place where the MP Floating Pointer Structure may live is the last |
| * kilobyte of base memory. |
| */ |
| addr = 639*1024; |
| cnt = 1024; |
| while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
| if (mp_fs_check((__u8 *) addr)) |
| goto fs_found; |
| addr++; |
| cnt--; |
| } |
| |
| /* |
| * As the last resort, MP Floating Pointer Structure is searched in the BIOS |
| * ROM. |
| */ |
| addr = 0xf0000; |
| cnt = 64*1024; |
| while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) { |
| if (mp_fs_check((__u8 *) addr)) |
| goto fs_found; |
| addr++; |
| cnt--; |
| } |
| |
| return; |
| |
| fs_found: |
| printf("%L: MP Floating Pointer Structure\n", addr); |
| |
| fs = (struct __mpfs *) addr; |
| frame_not_free((__address) fs); |
| |
| if (fs->config_type == 0 && fs->configuration_table) { |
| if (fs->mpfib2 >> 7) { |
| printf("mp_init: PIC mode not supported\n"); |
| return; |
| } |
| |
| ct = fs->configuration_table; |
| frame_not_free((__address) ct); |
| config.cpu_count = configure_via_ct(); |
| } |
| else |
| config.cpu_count = configure_via_default(fs->config_type); |
| |
| if (config.cpu_count > 1) { |
| map_page_to_frame((__address) l_apic, (__address) l_apic, PAGE_NOT_CACHEABLE, 0); |
| } |
| |
| |
| /* |
| * Must be initialized outside the kmp thread, since it is waited |
| * on before the kmp thread is created. |
| */ |
| waitq_initialize(&kmp_completion_wq); |
| return; |
| } |
| |
| int configure_via_ct(void) |
| { |
| __u8 *cur; |
| int i, cnt; |
| |
| if (ct->signature != CT_SIGNATURE) { |
| printf("configure_via_ct: bad ct->signature\n"); |
| return 1; |
| } |
| if (!mp_ct_check()) { |
| printf("configure_via_ct: bad ct checksum\n"); |
| return 1; |
| } |
| if (ct->oem_table) { |
| printf("configure_via_ct: ct->oem_table not supported\n"); |
| return 1; |
| } |
| |
| l_apic = 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("configure_via_ct: ct badness\n"); |
| return 1; |
| } |
| } |
| |
| /* |
| * Process extended entries. |
| */ |
| ct_extended_entries(); |
| return cnt; |
| } |
| |
| int configure_via_default(__u8 n) |
| { |
| /* |
| * Not yet implemented. |
| */ |
| printf("configure_via_default: not supported\n"); |
| 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 MPCT_VERBOSE |
| char buf[7]; |
| memcopy((__address) bus->bus_type, (__address) buf,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; |
| } |
| |
| map_page_to_frame((__address) ioa->io_apic, (__address) ioa->io_apic, PAGE_NOT_CACHEABLE, 0); |
| |
| io_apic = ioa->io_apic; |
| } |
| |
| //#define MPCT_VERBOSE |
| void ct_io_intr_entry(struct __io_intr_entry *iointr) |
| { |
| #ifdef MPCT_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 MPCT_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) |
| { |
| /* |
| * Not yet implemented. |
| */ |
| if (ct->ext_table_length) |
| panic("ct_extended_entries: not supported\n"); |
| } |
| |
| /* |
| * Kernel thread for bringing up application processors. It becomes clear |
| * that we need an arrangement like this (AP's being initialized by a kernel |
| * thread), for a thread has its dedicated stack. (The stack used during the |
| * BSP initialization (prior the very first call to scheduler()) will be used |
| * as an initialization stack for each AP.) |
| */ |
| void kmp(void *arg) |
| { |
| struct __processor_entry *pr; |
| __address src, dst; |
| __address frame; |
| int i; |
| |
| waitq_initialize(&ap_completion_wq); |
| |
| /* |
| * Processor entries immediately follow the configuration table header. |
| */ |
| pr = processor_entries; |
| |
| /* |
| * Grab a frame and map its address to page 0. This is a hack which |
| * accesses data in frame 0. Note that page 0 is not present because |
| * of nil reference bug catching. |
| */ |
| frame = frame_alloc(FRAME_KA); |
| map_page_to_frame(frame,0,PAGE_CACHEABLE,0); |
| |
| /* |
| * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
| */ |
| *((__u16 *) (frame + 0x467+0)) = ((__address) ap_boot) >> 4; /* segment */ |
| *((__u16 *) (frame + 0x467+2)) = 0x0; /* offset */ |
| |
| /* |
| * Give back the borrowed frame and restore identity mapping for it. |
| */ |
| map_page_to_frame(frame,frame,PAGE_CACHEABLE,0); |
| frame_free(frame); |
| |
| /* |
| * Save 0xa to address 0xf of the CMOS RAM. |
| * BIOS will not do the POST after the INIT signal. |
| */ |
| outb(0x70,0xf); |
| outb(0x71,0xa); |
| |
| cpu_priority_high(); |
| |
| pic_disable_irqs(0xffff); |
| apic_init(); |
| |
| for (i = 0; i < processor_entry_cnt; i++) { |
| struct descriptor *gdt_new; |
| |
| /* |
| * Skip processors marked unusable. |
| */ |
| if (pr[i].cpu_flags & (1<<0) == 0) |
| continue; |
| |
| /* |
| * The bootstrap processor is already up. |
| */ |
| if (pr[i].cpu_flags & (1<<1)) |
| continue; |
| |
| /* |
| * Prepare new GDT for CPU in question. |
| */ |
| if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
| panic(PANIC "couldn't allocate memory for GDT\n"); |
| |
| memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
| gdtr.base = (__address) gdt_new; |
| |
| if (l_apic_send_init_ipi(pr[i].l_apic_id)) { |
| /* |
| * There may be just one AP being initialized at |
| * the time. After it comes completely up, it is |
| * supposed to wake us up. |
| */ |
| waitq_sleep(&ap_completion_wq); |
| cpu_priority_high(); |
| } |
| else { |
| printf("INIT IPI for l_apic%d failed\n", pr[i].l_apic_id); |
| } |
| } |
| |
| /* |
| * Wakeup the kinit thread so that |
| * system initialization can go on. |
| */ |
| waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
| } |
| |
| int mp_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 /* __SMP__ */ |