LXR coreboot-v2/src/mainboard/via/epia-m/acpi

   1/*
   2 * coreboot ACPI Table support
   3 * written by Stefan Reinauer <stepan@openbios.org>
   4 * ACPI FADT, FACS, and DSDT table support added by 
   5 * Nick Barker <nick.barker9@btinternet.com>, and those portions
   6 * (C) Copyright 2004 Nick Barker
   7 * (C) Copyright 2005 Stefan Reinauer
   8 */
   9
  10#include <console/console.h>
  11#include <string.h>
  12#include <arch/acpi.h>
  13
  14extern unsigned char AmlCode[];
  15
  16unsigned long acpi_fill_mcfg(unsigned long current)
  17{
  18        /* Nothing to do */
  19        return current;
  20}
  21
  22unsigned long acpi_fill_slit(unsigned long current)
  23{
  24        // Not implemented
  25        return current;
  26}
  27
  28unsigned long acpi_fill_madt(unsigned long current)
  29{
  30        /* Nothing to do */
  31        return current;
  32}
  33
  34unsigned long acpi_fill_srat(unsigned long current)
  35{
  36        /* No NUMA, no SRAT */
  37        return current;
  38}
  39
  40unsigned long write_acpi_tables(unsigned long start)
  41{
  42        unsigned long current;
  43        acpi_rsdp_t *rsdp;
  44        acpi_rsdt_t *rsdt;
  45        acpi_hpet_t *hpet;
  46        acpi_madt_t *madt;
  47        acpi_fadt_t *fadt;
  48        acpi_facs_t *facs;
  49        acpi_header_t *dsdt;
  50        
  51        /* Align ACPI tables to 16byte */
  52        start   = ( start + 0x0f ) & -0x10;
  53        current = start;
  54        
  55        printk_info("ACPI: Writing ACPI tables at %lx...\n", start);
  56
  57        /* We need at least an RSDP and an RSDT Table */
  58        rsdp = (acpi_rsdp_t *) current;
  59        current += sizeof(acpi_rsdp_t);
  60        rsdt = (acpi_rsdt_t *) current;
  61        current += sizeof(acpi_rsdt_t);
  62
  63        /* clear all table memory */
  64        memset((void *)start, 0, current - start);
  65        
  66        acpi_write_rsdp(rsdp, rsdt, NULL);
  67        acpi_write_rsdt(rsdt);
  68        
  69        /*
  70         * We explicitly add these tables later on:
  71         */
  72        printk_debug("ACPI:     * FACS\n");
  73        facs = (acpi_facs_t *) current;
  74        current += sizeof(acpi_facs_t);
  75        acpi_create_facs(facs);
  76
  77        dsdt = (acpi_header_t *)current;
  78        current += ((acpi_header_t *)AmlCode)->length;
  79        memcpy((void *)dsdt,(void *)AmlCode, ((acpi_header_t *)AmlCode)->length);
  80        dsdt->checksum = 0; // don't trust intel iasl compiler to get this right
  81        dsdt->checksum = acpi_checksum(dsdt,dsdt->length);
  82        printk_debug("ACPI:     * DSDT @ %08x Length %x\n",dsdt,dsdt->length);
  83        printk_debug("ACPI:     * FADT\n");
  84
  85        fadt = (acpi_fadt_t *) current;
  86        current += sizeof(acpi_fadt_t);
  87
  88        acpi_create_fadt(fadt,facs,dsdt);
  89        acpi_add_table(rsdp,fadt);
  90
  91        printk_info("ACPI: done.\n");
  92        return current;
  93}
  94
  95