示例#1
0
文件: acpi.c 项目: 0ida/coreboot
void *igd_make_opregion(void)
{
	igd_opregion_t *opregion;

	printk(BIOS_DEBUG, "ACPI:    * IGD OpRegion\n");
	opregion = cbmem_add(CBMEM_ID_IGD_OPREGION, sizeof (*opregion));
	if (opregion)
		init_igd_opregion(opregion);
	return opregion;
}
示例#2
0
static unsigned long write_acpi_igd_opregion(device_t device,
        unsigned long current, struct acpi_rsdp *rsdp)
{
    igd_opregion_t *opregion;

    /* If GOP is not used, exit here */
    if (!IS_ENABLED(CONFIG_GOP_SUPPORT))
        return current;

    /* If IGD is disabled, exit here */
    if (pci_read_config16(device, PCI_VENDOR_ID) == 0xFFFF)
        return current;

    printk(BIOS_DEBUG, "ACPI: * IGD OpRegion\n");
    opregion = (igd_opregion_t *)current;
    init_igd_opregion(opregion);
    current += sizeof(igd_opregion_t);
    ALIGN_CURRENT;

    printk(BIOS_DEBUG, "current = %lx\n", current);
    return current;
}
示例#3
0
unsigned long write_acpi_tables(unsigned long start)
{
	unsigned long current;
	int i;
	acpi_rsdp_t *rsdp;
	acpi_rsdt_t *rsdt;
	acpi_xsdt_t *xsdt;
	acpi_hpet_t *hpet;
	acpi_madt_t *madt;
	acpi_mcfg_t *mcfg;
	acpi_fadt_t *fadt;
	acpi_facs_t *facs;
#if CONFIG_HAVE_ACPI_SLIC
	acpi_header_t *slic;
#endif
	acpi_header_t *ssdt;
	acpi_header_t *dsdt;
	igd_opregion_t *opregion;

	current = start;

	/* Align ACPI tables to 16byte */
	ALIGN_CURRENT;

	printk(BIOS_INFO, "ACPI: Writing ACPI tables at %lx.\n", start);

	/* We need at least an RSDP and an RSDT Table */
	rsdp = (acpi_rsdp_t *) current;
	current += sizeof(acpi_rsdp_t);
	ALIGN_CURRENT;
	rsdt = (acpi_rsdt_t *) current;
	current += sizeof(acpi_rsdt_t);
	ALIGN_CURRENT;
	xsdt = (acpi_xsdt_t *) current;
	current += sizeof(acpi_xsdt_t);
	ALIGN_CURRENT;

	/* clear all table memory */
	memset((void *) start, 0, current - start);

	acpi_write_rsdp(rsdp, rsdt, xsdt);
	acpi_write_rsdt(rsdt);
	acpi_write_xsdt(xsdt);

	printk(BIOS_DEBUG, "ACPI:    * FACS\n");
	facs = (acpi_facs_t *) current;
	current += sizeof(acpi_facs_t);
	ALIGN_CURRENT;
	acpi_create_facs(facs);

	printk(BIOS_DEBUG, "ACPI:    * DSDT\n");
	dsdt = (acpi_header_t *) current;
	memcpy(dsdt, &AmlCode, sizeof(acpi_header_t));
	current += dsdt->length;
	memcpy(dsdt, &AmlCode, dsdt->length);

	ALIGN_CURRENT;

	printk(BIOS_DEBUG, "ACPI:    * FADT\n");
	fadt = (acpi_fadt_t *) current;
	current += sizeof(acpi_fadt_t);
	ALIGN_CURRENT;

	acpi_create_fadt(fadt, facs, dsdt);
	acpi_add_table(rsdp, fadt);

	/*
	 * We explicitly add these tables later on:
	 */
	printk(BIOS_DEBUG, "ACPI:    * HPET\n");

	hpet = (acpi_hpet_t *) current;
	current += sizeof(acpi_hpet_t);
	ALIGN_CURRENT;
	acpi_create_hpet(hpet);
	acpi_add_table(rsdp, hpet);

	/* If we want to use HPET Timers Linux wants an MADT */
	printk(BIOS_DEBUG, "ACPI:    * MADT\n");

	madt = (acpi_madt_t *) current;
	acpi_create_madt(madt);
	current += madt->header.length;
	ALIGN_CURRENT;
	acpi_add_table(rsdp, madt);

	printk(BIOS_DEBUG, "ACPI:    * MCFG\n");
	mcfg = (acpi_mcfg_t *) current;
	acpi_create_mcfg(mcfg);
	current += mcfg->header.length;
	ALIGN_CURRENT;
	acpi_add_table(rsdp, mcfg);

	printk(BIOS_DEBUG, "ACPI:    * IGD OpRegion\n");
	opregion = (igd_opregion_t *)current;
	init_igd_opregion(opregion);
	current += sizeof(igd_opregion_t);
	ALIGN_CURRENT;

	printk(BIOS_DEBUG, "ACPI:    * GNVS\n");
	/* Pack GNVS into the ACPI table area */
	for (i=0; i < dsdt->length; i++) {
		if (*(u32*)(((u32)dsdt) + i) == 0xC0DEBABE) {
			printk(BIOS_DEBUG, "ACPI: Patching up global NVS in "
			     "DSDT at offset 0x%04x -> 0x%08lx\n", i, current);
			*(u32*)(((u32)dsdt) + i) = current; // 0x92 bytes
			acpi_save_gnvs(current);
			break;
		}
	}

	/* And fill it */
	acpi_create_gnvs((global_nvs_t *)current, opregion);

	/* And tell SMI about it */
	smm_setup_structures((void *)current, NULL, NULL);

	current += sizeof(global_nvs_t);
	ALIGN_CURRENT;

	/* We patched up the DSDT, so we need to recalculate the checksum */
	dsdt->checksum = 0;
	dsdt->checksum = acpi_checksum((void *)dsdt, dsdt->length);

	printk(BIOS_DEBUG, "ACPI:     * DSDT @ %p Length %x\n", dsdt,
		     dsdt->length);

#if CONFIG_HAVE_ACPI_SLIC
	printk(BIOS_DEBUG, "ACPI:     * SLIC\n");
	slic = (acpi_header_t *)current;
	current += acpi_create_slic(current);
	ALIGN_CURRENT;
	acpi_add_table(rsdp, slic);
#endif

	printk(BIOS_DEBUG, "ACPI:     * SSDT\n");
	ssdt = (acpi_header_t *)current;
	acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR);
	current += ssdt->length;
	acpi_add_table(rsdp, ssdt);
	ALIGN_CURRENT;

	printk(BIOS_DEBUG, "current = %lx\n", current);
	printk(BIOS_INFO, "ACPI: done.\n");
	return current;
}