예제 #1
0
unsigned long mainboard_write_acpi_tables(device_t device,
					  unsigned long start,
					  acpi_rsdp_t *rsdp)
{
	unsigned long current;
	acpi_header_t *ecdt;

	current = start;

	/* Align ACPI tables to 16byte */
	current = acpi_align_current(current);

	printk(BIOS_DEBUG, "ACPI:     * ECDT\n");
	ecdt = (acpi_header_t *)current;
	current += acpi_create_ecdt((acpi_ecdt_t *)current);
	current = acpi_align_current(current);
	acpi_add_table(rsdp, ecdt);

	printk(BIOS_DEBUG, "current = %lx\n", current);
	return current;
}
예제 #2
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;
	acpi_header_t *ecdt;

	void *gnvs, *smi1;

	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);

	/*
	 * 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:     * FACS\n");
	facs = (acpi_facs_t *) current;
	current += sizeof(acpi_facs_t);
	ALIGN_CURRENT;
	acpi_create_facs(facs);

	dsdt = (acpi_header_t *) current;
	memcpy(dsdt, &AmlCode, sizeof(acpi_header_t));
	current += dsdt->length;
	memcpy(dsdt, &AmlCode, dsdt->length);

	/* Fix up global NVS region for SMI handler. The GNVS region lives
	 * in the (high) table area. The low memory map looks like this:
	 *
	 * 0x00000000 - 0x000003ff	Real Mode IVT
	 * 0x00000400 - 0x000004ff	BDA (somewhat unused)
	 * 0x00000500 - 0x00000518	coreboot table forwarder
	 * 0x00000600 - 0x00000???	realmode trampoline
	 * 0x0007c000 - 0x0007dfff	OS boot sector (unused?)
	 * 0x0007e000 - 0x0007ffff	free to use (so no good for acpi+smi)
	 * 0x00080000 - 0x0009fbff	usable ram
	 * 0x0009fc00 - 0x0009ffff	EBDA (unused?)
	 * 0x000a0000 - 0x000bffff	VGA memory
	 * 0x000c0000 - 0x000cffff	VGA option rom
	 * 0x000d0000 - 0x000dffff	free for other option roms?
	 * 0x000e0000 - 0x000fffff	SeaBIOS? (conflict with low tables:)
	 * 0x000f0000 - 0x000f03ff	PIRQ table
	 * 0x000f0400 - 0x000f66??	ACPI tables
	 * 0x000f66?? - 0x000f????	DMI tables
	 */

	ALIGN_CURRENT;

	/* 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%08x\n", i, (u32)current);
			*(u32*)(((u32)dsdt) + i) = current; // 0x92 bytes
			break;
		}
	}

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

	/* Keep pointer around */
	gnvs = (void *)current;

	current += 0x100;
	ALIGN_CURRENT;

	for (i=0; i < dsdt->length; i++) {
		if (*(u32*)(((u32)dsdt) + i) == 0xC0DEDEAD) {
			printk(BIOS_DEBUG, "ACPI: Patching up SMI1 area in DSDT at offset 0x%04x -> 0x%08x\n", i, (u32)current);
			*(u32*)(((u32)dsdt) + i) = current; // 0x100 bytes
			break;
		}
	}

	/* Keep pointer around */
	smi1 = (void *)current;

	current += 0x100;
	ALIGN_CURRENT;

	/* And tell SMI about it */
	smm_setup_structures(gnvs, NULL, smi1);

	/* 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);

	printk(BIOS_DEBUG, "ACPI:     * ECDT\n");
	ecdt = (acpi_header_t *)current;
	current += acpi_create_ecdt((acpi_ecdt_t *)current);
	ALIGN_CURRENT;
	acpi_add_table(rsdp, ecdt);

#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:     * 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);

	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;
}