src/arch/x86/tables.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2003 Eric Biederman
   5  * Copyright (C) 2005 Steve Magnani
   6  * Copyright (C) 2008-2009 coresystems GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <console/console.h>
  19 #include <cpu/cpu.h>
  20 #include <boot/tables.h>
  21 #include <boot/coreboot_tables.h>
  22 #include <arch/pirq_routing.h>
  23 #include <arch/smp/mpspec.h>
  24 #include <arch/acpi.h>
  25 #include <string.h>
  26 #include <cbmem.h>
  27 #include <smbios.h>
  28
  29 void write_tables(void)
  30 {
  31         unsigned long low_table_start, low_table_end;
  32         unsigned long rom_table_start, rom_table_end;
  33
  34         /* Even if high tables are configured, some tables are copied both to
  35          * the low and the high area, so payloads and OSes don't need to know
  36          * about the high tables.
  37          */
  38         unsigned long high_table_pointer;
  39
  40         rom_table_start = 0xf0000;
  41         rom_table_end =   0xf0000;
  42
  43         /* Start low addr at 0x500, so we don't run into conflicts with the BDA
  44          * in case our data structures grow beyond 0x400. Only GDT
  45          * and the coreboot table use low_tables.
  46          */
  47         low_table_start = 0;
  48         low_table_end = 0x500;
  49
  50 #if CONFIG_GENERATE_PIRQ_TABLE
  51 #define MAX_PIRQ_TABLE_SIZE (4 * 1024)
  52         post_code(0x9a);
  53
  54         /* This table must be between 0x0f0000 and 0x100000 */
  55         rom_table_end = write_pirq_routing_table(rom_table_end);
  56         rom_table_end = ALIGN(rom_table_end, 1024);
  57
  58         /* And add a high table version for those payloads that
  59          * want to live in the F segment
  60          */
  61         high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_PIRQ, MAX_PIRQ_TABLE_SIZE);
  62         if (high_table_pointer) {
  63                 unsigned long new_high_table_pointer;
  64                 new_high_table_pointer = write_pirq_routing_table(high_table_pointer);
  65                 // FIXME make pirq table code intelligent enough to know how
  66                 // much space it's going to need.
  67                 if (new_high_table_pointer > (high_table_pointer + MAX_PIRQ_TABLE_SIZE)) {
  68                         printk(BIOS_ERR, "ERROR: Increase PIRQ size.\n");
  69                 }
  70                 printk(BIOS_DEBUG, "PIRQ table: %ld bytes.\n",
  71                                 new_high_table_pointer - high_table_pointer);
  72         }
  73
  74 #endif
  75
  76 #if CONFIG_GENERATE_MP_TABLE
  77 #define MAX_MP_TABLE_SIZE (4 * 1024)
  78         post_code(0x9b);
  79
  80         /* The smp table must be in 0-1K, 639K-640K, or 960K-1M */
  81         rom_table_end = write_smp_table(rom_table_end);
  82         rom_table_end = ALIGN(rom_table_end, 1024);
  83
  84         high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_MPTABLE, MAX_MP_TABLE_SIZE);
  85         if (high_table_pointer) {
  86                 unsigned long new_high_table_pointer;
  87                 new_high_table_pointer = write_smp_table(high_table_pointer);
  88                 // FIXME make mp table code intelligent enough to know how
  89                 // much space it's going to need.
  90                 if (new_high_table_pointer > (high_table_pointer + MAX_MP_TABLE_SIZE)) {
  91                         printk(BIOS_ERR, "ERROR: Increase MP table size.\n");
  92                 }
  93
  94                 printk(BIOS_DEBUG, "MP table: %ld bytes.\n",
  95                                 new_high_table_pointer - high_table_pointer);
  96         }
  97 #endif /* CONFIG_GENERATE_MP_TABLE */
  98
  99 #if CONFIG_HAVE_ACPI_TABLES
 100 #define MAX_ACPI_SIZE (144 * 1024)
 101
 102         post_code(0x9c);
 103
 104         /* Write ACPI tables to F segment and high tables area */
 105
 106         /* Ok, this is a bit hacky still, because some day we want to have this
 107          * completely dynamic. But right now we are setting fixed sizes.
 108          * It's probably still better than the old high_table_base code because
 109          * now at least we know when we have an overflow in the area.
 110          *
 111          * We want to use 1MB - 64K for Resume backup. We use 512B for TOC and
 112          * 512 byte for GDT, 4K for PIRQ and 4K for MP table and 8KB for the
 113          * coreboot table. This leaves us with 47KB for all of ACPI. Let's see
 114          * how far we get.
 115          */
 116         high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_ACPI, MAX_ACPI_SIZE);
 117         if (high_table_pointer) {
 118                 unsigned long acpi_start = high_table_pointer;
 119                 unsigned long new_high_table_pointer;
 120
 121                 rom_table_end = ALIGN(rom_table_end, 16);
 122                 new_high_table_pointer = write_acpi_tables(high_table_pointer);
 123                 if (new_high_table_pointer > ( high_table_pointer + MAX_ACPI_SIZE)) {
 124                         printk(BIOS_ERR, "ERROR: Increase ACPI size\n");
 125                 }
 126                 printk(BIOS_DEBUG, "ACPI tables: %ld bytes.\n",
 127                                 new_high_table_pointer - high_table_pointer);
 128
 129                 /* Now we need to create a low table copy of the RSDP. */
 130
 131                 /* First we look for the high table RSDP */
 132                 while (acpi_start < new_high_table_pointer) {
 133                         if (memcmp(((acpi_rsdp_t *)acpi_start)->signature, RSDP_SIG, 8) == 0) {
 134                                 break;
 135                         }
 136                         acpi_start++;
 137                 }
 138
 139                 /* Now, if we found the RSDP, we take the RSDT and XSDT pointer
 140                  * from it in order to write the low RSDP
 141                  */
 142                 if (acpi_start < new_high_table_pointer) {
 143                         acpi_rsdp_t *low_rsdp = (acpi_rsdp_t *)rom_table_end,
 144                                     *high_rsdp = (acpi_rsdp_t *)acpi_start;
 145
 146                         /* Technically rsdp length varies but coreboot always
 147                            writes longest size available.  */
 148                         memcpy(low_rsdp, high_rsdp, sizeof(acpi_rsdp_t));
 149                 } else {
 150                         printk(BIOS_ERR, "ERROR: Didn't find RSDP in high table.\n");
 151                 }
 152                 rom_table_end = ALIGN(rom_table_end + sizeof(acpi_rsdp_t), 16);
 153         } else {
 154                 rom_table_end = write_acpi_tables(rom_table_end);
 155                 rom_table_end = ALIGN(rom_table_end, 1024);
 156         }
 157
 158 #endif
 159 #define MAX_SMBIOS_SIZE 2048
 160 #if CONFIG_GENERATE_SMBIOS_TABLES
 161         high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_SMBIOS, MAX_SMBIOS_SIZE);
 162         if (high_table_pointer) {
 163                 unsigned long new_high_table_pointer;
 164
 165                 new_high_table_pointer = smbios_write_tables(high_table_pointer);
 166                 rom_table_end = ALIGN(rom_table_end, 16);
 167                 memcpy((void *)rom_table_end, (void *)high_table_pointer, sizeof(struct smbios_entry));
 168                 rom_table_end += sizeof(struct smbios_entry);
 169
 170                 if (new_high_table_pointer > ( high_table_pointer + MAX_SMBIOS_SIZE)) {
 171                         printk(BIOS_ERR, "ERROR: Increase SMBIOS size\n");
 172                 }
 173                 printk(BIOS_DEBUG, "SMBIOS tables: %ld bytes.\n",
 174                                 new_high_table_pointer - high_table_pointer);
 175         } else {
 176                 unsigned long new_rom_table_end = smbios_write_tables(rom_table_end);
 177                 printk(BIOS_DEBUG, "SMBIOS size %ld bytes\n", new_rom_table_end - rom_table_end);
 178                 rom_table_end = ALIGN(new_rom_table_end, 16);
 179         }
 180 #endif
 181
 182         post_code(0x9e);
 183
 184 #define MAX_COREBOOT_TABLE_SIZE (32 * 1024)
 185         post_code(0x9d);
 186
 187         high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_CBTABLE, MAX_COREBOOT_TABLE_SIZE);
 188
 189         if (high_table_pointer) {
 190                 unsigned long new_high_table_pointer;
 191
 192                 /* FIXME: The high_table_base parameter is not reference when tables are high,
 193                  * or high_table_pointer >1 MB.
 194                  */
 195                 u64 fixme_high_tables_base = 0;
 196
 197                 /* Also put a forwarder entry into 0-4K */
 198                 new_high_table_pointer = write_coreboot_table(low_table_start, low_table_end,
 199                                 fixme_high_tables_base, high_table_pointer);
 200
 201                 if (new_high_table_pointer > (high_table_pointer +
 202                                         MAX_COREBOOT_TABLE_SIZE))
 203                         printk(BIOS_ERR, "%s: coreboot table didn't fit (%lx)\n",
 204                                    __func__, new_high_table_pointer -
 205                                    high_table_pointer);
 206
 207                 printk(BIOS_DEBUG, "coreboot table: %ld bytes.\n",
 208                                 new_high_table_pointer - high_table_pointer);
 209         } else {
 210                 /* The coreboot table must be in 0-4K or 960K-1M */
 211                 write_coreboot_table(low_table_start, low_table_end,
 212                                      rom_table_start, rom_table_end);
 213         }
 214
 215         /* Print CBMEM sections */
 216         cbmem_list();
 217 }