WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia32/src/smp/mps.c

 /*
  * 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 __SMP__
-#include <arch/pm.h>
 #include <config.h>
 #include <print.h>
-#include <panic.h>
+#include <debug.h>
 #include <arch/smp/mps.h>
-#include <arch/smp/ap.h>
 #include <arch/smp/apic.h>
+#include <arch/smp/smp.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>
 #include <arch/bios/bios.h>
-#include <arch/acpi/madt.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);
+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
+};
+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 *) 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 *) (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("%L: MPS Floating Pointer Structure\n", fs);
     frame_not_free((__address) fs);
     if (fs->config_type == 0 && fs->configuration_table) {
         if (fs->mpfib2 >> 7) {
             printf("%s: PIC mode not supported\n", __FUNCTION__);
             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("%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 = 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];
     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 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("%L: skipping MP Configuration Table extended entry type %d\n", cur, cur[CT_EXT_ENTRY_TYPE]);
                 break;
+        }
+    }
+}
-/*
- * 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;
-    int i;
-    waitq_initialize(&ap_completion_wq);
-    /*
-     * Processor entries immediately follow the configuration table header.
-     */
-    pr = processor_entries;
-    /*
-     * We need to access data in frame 0.
-     * We boldly make use of kernel address space mapping.
-     */
-    /*
-     * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot()
-     */
-    *((__u16 *) (PA2KA(0x467+0))) =  ((__address) ap_boot) >> 4;    /* segment */
-    *((__u16 *) (PA2KA(0x467+2))) =  0;             /* offset */
-    /*
-     * 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;
-        if (pr[i].l_apic_id == l_apic_id()) {
-            printf("%L: bad processor entry #%d, will not send IPI to myself\n", &pr[i], i);
-            continue;
-        }
-        /*
-         * Prepare new GDT for CPU in question.
-         */
-        if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor))))
-            panic("couldn't allocate memory for GDT\n");
-        memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor));
-        memsetb(&gdt_new[TSS_DES], sizeof(struct descriptor), 0);
-        gdtr.base = KA2PA((__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 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 /* __SMP__ */

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/src/smp/mps.c @ 1780 – Rev 125 → 128