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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29.  /** @addtogroup genarch   
  30.  * @{
  31.  */
  32. /**
  33.  * @file    madt.c
  34.  * @brief   Multiple APIC Description Table (MADT) parsing.
  35.  */
  36.  
  37. #include <arch/types.h>
  38. #include <typedefs.h>
  39. #include <genarch/acpi/acpi.h>
  40. #include <genarch/acpi/madt.h>
  41. #include <arch/smp/apic.h>
  42. #include <arch/smp/smp.h>
  43. #include <panic.h>
  44. #include <debug.h>
  45. #include <config.h>
  46. #include <print.h>
  47. #include <mm/slab.h>
  48. #include <memstr.h>
  49. #include <sort.h>
  50.  
  51. struct acpi_madt *acpi_madt = NULL;
  52.  
  53. #ifdef CONFIG_SMP
  54.  
  55. /** Standard ISA IRQ map; can be overriden by Interrupt Source Override entries of MADT. */
  56. int isa_irq_map[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
  57.  
  58. static void madt_l_apic_entry(struct madt_l_apic *la, __u32 index);
  59. static void madt_io_apic_entry(struct madt_io_apic *ioa, __u32 index);
  60. static void madt_intr_src_ovrd_entry(struct madt_intr_src_ovrd *override, __u32 index);
  61. static int madt_cmp(void * a, void * b);
  62.  
  63. struct madt_l_apic *madt_l_apic_entries = NULL;
  64. struct madt_io_apic *madt_io_apic_entries = NULL;
  65.  
  66. index_t madt_l_apic_entry_index = 0;
  67. index_t madt_io_apic_entry_index = 0;
  68. count_t madt_l_apic_entry_cnt = 0;
  69. count_t madt_io_apic_entry_cnt = 0;
  70. count_t cpu_count = 0;
  71.  
  72. struct madt_apic_header * * madt_entries_index = NULL;
  73. int madt_entries_index_cnt = 0;
  74.  
  75. char *entry[] = {
  76.     "L_APIC",
  77.     "IO_APIC",
  78.     "INTR_SRC_OVRD",
  79.     "NMI_SRC",
  80.     "L_APIC_NMI",
  81.     "L_APIC_ADDR_OVRD",
  82.     "IO_SAPIC",
  83.     "L_SAPIC",
  84.     "PLATFORM_INTR_SRC"
  85. };
  86.  
  87. /*
  88.  * ACPI MADT Implementation of SMP configuration interface.
  89.  */
  90. static count_t madt_cpu_count(void);
  91. static bool madt_cpu_enabled(index_t i);
  92. static bool madt_cpu_bootstrap(index_t i);
  93. static __u8 madt_cpu_apic_id(index_t i);
  94. static int madt_irq_to_pin(int irq);
  95.  
  96. struct smp_config_operations madt_config_operations = {
  97.     .cpu_count = madt_cpu_count,
  98.     .cpu_enabled = madt_cpu_enabled,
  99.     .cpu_bootstrap = madt_cpu_bootstrap,
  100.     .cpu_apic_id = madt_cpu_apic_id,
  101.     .irq_to_pin = madt_irq_to_pin
  102. };
  103.  
  104. count_t madt_cpu_count(void)
  105. {
  106.     return madt_l_apic_entry_cnt;
  107. }
  108.  
  109. bool madt_cpu_enabled(index_t i)
  110. {
  111.     ASSERT(i < madt_l_apic_entry_cnt);
  112.     return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->flags & 0x1;
  113.  
  114. }
  115.  
  116. bool madt_cpu_bootstrap(index_t i)
  117. {
  118.     ASSERT(i < madt_l_apic_entry_cnt);
  119.     return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->apic_id == l_apic_id();
  120. }
  121.  
  122. __u8 madt_cpu_apic_id(index_t i)
  123. {
  124.     ASSERT(i < madt_l_apic_entry_cnt);
  125.     return ((struct madt_l_apic *) madt_entries_index[madt_l_apic_entry_index + i])->apic_id;
  126. }
  127.  
  128. int madt_irq_to_pin(int irq)
  129. {
  130.     ASSERT(irq < sizeof(isa_irq_map)/sizeof(int));
  131.         return isa_irq_map[irq];
  132. }
  133.  
  134. int madt_cmp(void * a, void * b)
  135. {
  136.     return
  137.         (((struct madt_apic_header *) a)->type > ((struct madt_apic_header *) b)->type) ?
  138.         1 :
  139.         ((((struct madt_apic_header *) a)->type < ((struct madt_apic_header *) b)->type) ? -1 : 0);
  140. }
  141.    
  142. void acpi_madt_parse(void)
  143. {
  144.     struct madt_apic_header *end = (struct madt_apic_header *) (((__u8 *) acpi_madt) + acpi_madt->header.length);
  145.     struct madt_apic_header *h;
  146.    
  147.         l_apic = (__u32 *) (__native) acpi_madt->l_apic_address;
  148.  
  149.     /* calculate madt entries */
  150.     for (h = &acpi_madt->apic_header[0]; h < end; h = (struct madt_apic_header *) (((__u8 *) h) + h->length)) {
  151.         madt_entries_index_cnt++;
  152.     }
  153.  
  154.     /* create madt apic entries index array */
  155.     madt_entries_index = (struct madt_apic_header * *) malloc(madt_entries_index_cnt * sizeof(struct madt_apic_header * *), FRAME_ATOMIC);
  156.     if (!madt_entries_index)
  157.         panic("Memory allocation error.");
  158.  
  159.     __u32 index = 0;
  160.  
  161.     for (h = &acpi_madt->apic_header[0]; h < end; h = (struct madt_apic_header *) (((__u8 *) h) + h->length)) {
  162.         madt_entries_index[index++] = h;
  163.     }
  164.  
  165.     /* Quicksort MADT index structure */
  166.     qsort(madt_entries_index, madt_entries_index_cnt, sizeof(__address), &madt_cmp);
  167.  
  168.     /* Parse MADT entries */   
  169.     for (index = 0; index < madt_entries_index_cnt - 1; index++) {
  170.         h = madt_entries_index[index];
  171.         switch (h->type) {
  172.             case MADT_L_APIC:
  173.                 madt_l_apic_entry((struct madt_l_apic *) h, index);
  174.                 break;
  175.             case MADT_IO_APIC:
  176.                 madt_io_apic_entry((struct madt_io_apic *) h, index);
  177.                 break;
  178.             case MADT_INTR_SRC_OVRD:
  179.                 madt_intr_src_ovrd_entry((struct madt_intr_src_ovrd *) h, index);
  180.                 break;
  181.             case MADT_NMI_SRC:
  182.             case MADT_L_APIC_NMI:
  183.             case MADT_L_APIC_ADDR_OVRD:
  184.             case MADT_IO_SAPIC:
  185.             case MADT_L_SAPIC:
  186.             case MADT_PLATFORM_INTR_SRC:
  187.                 printf("MADT: skipping %s entry (type=%zd)\n", entry[h->type], h->type);
  188.                 break;
  189.  
  190.             default:
  191.                 if (h->type >= MADT_RESERVED_SKIP_BEGIN && h->type <= MADT_RESERVED_SKIP_END) {
  192.                     printf("MADT: skipping reserved entry (type=%zd)\n", h->type);
  193.                 }
  194.                 if (h->type >= MADT_RESERVED_OEM_BEGIN) {
  195.                     printf("MADT: skipping OEM entry (type=%zd)\n", h->type);
  196.                 }
  197.                 break;
  198.         }
  199.    
  200.    
  201.     }
  202.    
  203.  
  204.     if (cpu_count)
  205.         config.cpu_count = cpu_count;
  206. }
  207.  
  208.  
  209. void madt_l_apic_entry(struct madt_l_apic *la, __u32 index)
  210. {
  211.     if (!madt_l_apic_entry_cnt++) {
  212.         madt_l_apic_entry_index = index;
  213.     }
  214.        
  215.     if (!(la->flags & 0x1)) {
  216.         /* Processor is unusable, skip it. */
  217.         return;
  218.     }
  219.    
  220.     cpu_count++;   
  221.     apic_id_mask |= 1<<la->apic_id;
  222. }
  223.  
  224. void madt_io_apic_entry(struct madt_io_apic *ioa, __u32 index)
  225. {
  226.     if (!madt_io_apic_entry_cnt++) {
  227.         /* remember index of the first io apic entry */
  228.         madt_io_apic_entry_index = index;
  229.         io_apic = (__u32 *) (__native) ioa->io_apic_address;
  230.     } else {
  231.         /* currently not supported */
  232.         return;
  233.     }
  234. }
  235.  
  236. void madt_intr_src_ovrd_entry(struct madt_intr_src_ovrd *override, __u32 index)
  237. {
  238.     ASSERT(override->source < sizeof(isa_irq_map)/sizeof(int));
  239.     printf("MADT: ignoring %s entry: bus=%zd, source=%zd, global_int=%zd, flags=%#hX\n",
  240.         entry[override->header.type], override->bus, override->source,
  241.         override->global_int, override->flags);
  242. }
  243.  
  244. #endif /* CONFIG_SMP */
  245.  
  246.  /** @}
  247.  */
  248.  
  249.