src/mainboard/getac/p470/acpi_tables.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; version 2 of
   8  * the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <types.h>
  17 #include <string.h>
  18 #include <console/console.h>
  19 #include <arch/acpi.h>
  20 #include <device/device.h>
  21 #include <southbridge/intel/i82801gx/nvs.h>
  22
  23 #include "mainboard.h"
  24
  25 void acpi_create_gnvs(global_nvs_t *gnvs)
  26 {
  27         /* Enable COM port(s) */
  28         gnvs->cmap = 0x01;
  29         gnvs->cmbp = 0x00;
  30 }
  31
  32 static long acpi_create_ecdt(acpi_ecdt_t * ecdt)
  33 {
  34         /* Attention: Make sure these match the values from
  35          * the DSDT's ec.asl
  36          */
  37         static const char ec_id[] = "\\_SB.PCI0.LPCB.EC0";
  38         int ecdt_len = sizeof(acpi_ecdt_t) + strlen(ec_id) + 1;
  39
  40         acpi_header_t *header = &(ecdt->header);
  41
  42         memset((void *) ecdt, 0, ecdt_len);
  43
  44         /* fill out header fields */
  45         memcpy(header->signature, "ECDT", 4);
  46         memcpy(header->oem_id, OEM_ID, 6);
  47         memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
  48         memcpy(header->asl_compiler_id, ASLC, 4);
  49
  50         header->length = ecdt_len;
  51         header->revision = 1;
  52
  53         /* Location of the two EC registers */
  54         ecdt->ec_control.space_id = ACPI_ADDRESS_SPACE_IO;
  55         ecdt->ec_control.bit_width = 8;
  56         ecdt->ec_control.bit_offset = 0;
  57         ecdt->ec_control.addrl = 0x66;
  58         ecdt->ec_control.addrh = 0;
  59
  60         ecdt->ec_data.space_id = ACPI_ADDRESS_SPACE_IO; /* Memory */
  61         ecdt->ec_data.bit_width = 8;
  62         ecdt->ec_data.bit_offset = 0;
  63         ecdt->ec_data.addrl = 0x62;
  64         ecdt->ec_data.addrh = 0;
  65
  66         ecdt->uid = 1; // Must match _UID of the EC0 node.
  67
  68         ecdt->gpe_bit = 23; // SCI interrupt within GPEx_STS
  69
  70         memcpy(ecdt->ec_id, ec_id, sizeof(ec_id));
  71
  72         header->checksum =
  73             acpi_checksum((void *) ecdt, ecdt_len);
  74
  75         return header->length;
  76 }
  77
  78 unsigned long mainboard_write_acpi_tables(struct device *device,
  79                                           unsigned long start,
  80                                           acpi_rsdp_t *rsdp)
  81 {
  82         unsigned long current;
  83         acpi_header_t *ecdt;
  84
  85         current = start;
  86
  87         /* Align ACPI tables to 16byte */
  88         current = acpi_align_current(current);
  89
  90         printk(BIOS_DEBUG, "ACPI:     * ECDT\n");
  91         ecdt = (acpi_header_t *)current;
  92         current += acpi_create_ecdt((acpi_ecdt_t *)current);
  93         current = acpi_align_current(current);
  94         acpi_add_table(rsdp, ecdt);
  95
  96         printk(BIOS_DEBUG, "current = %lx\n", current);
  97         return current;
  98 }