acpi.c

xen 3.2.2 源码

	/* remember the value for reference after free_initmem() */
#ifdef CONFIG_ITANIUM
	has_8259 = 1; /* Firmware on old Itanium systems is broken */
#else
	has_8259 = acpi_madt->flags.pcat_compat;
#endif
	iosapic_system_init(has_8259);

	/* Get base address of IPI Message Block */

	if (acpi_madt->lapic_address)
		ipi_base_addr = (void __iomem *) ioremap(acpi_madt->lapic_address, 0);

	printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);

	acpi_madt_oem_check(acpi_madt->header.oem_id,
		acpi_madt->header.oem_table_id);

	return 0;
}

#ifdef CONFIG_ACPI_NUMA

#undef SLIT_DEBUG

#define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)

static int __initdata srat_num_cpus;			/* number of cpus */
static u32 __initdata pxm_flag[PXM_FLAG_LEN];
#define pxm_bit_set(bit)	(set_bit(bit,(void *)pxm_flag))
#define pxm_bit_test(bit)	(test_bit(bit,(void *)pxm_flag))
/* maps to convert between proximity domain and logical node ID */
int __initdata pxm_to_nid_map[MAX_PXM_DOMAINS];
int __initdata nid_to_pxm_map[MAX_NUMNODES];
static struct acpi_table_slit __initdata *slit_table;

#define NID_INVAL			-1
#define PXM_INVAL			-1

int __init pxm_to_node(int pxm)
{
	if (pxm < 0)
		return NID_INVAL;
	return pxm_to_nid_map[pxm];
}

int __init node_to_pxm(int node)
{
	if (node < 0)
		return PXM_INVAL;
	return nid_to_pxm_map[node];
}


/*
 * ACPI 2.0 SLIT (System Locality Information Table)
 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
 */
void __init
acpi_numa_slit_init (struct acpi_table_slit *slit)
{
	u32 len;

	len = sizeof(struct acpi_table_header) + 8
		+ slit->localities * slit->localities;
	if (slit->header.length != len) {
		printk(KERN_ERR "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
		       len, slit->header.length);
		memset(numa_slit, 10, sizeof(numa_slit));
		return;
	}
	slit_table = slit;
}

void __init
acpi_numa_processor_affinity_init (struct acpi_table_processor_affinity *pa)
{
	/* record this node in proximity bitmap */
	pxm_bit_set(pa->proximity_domain);

	node_cpuid[srat_num_cpus].phys_id = (pa->apic_id << 8) | (pa->lsapic_eid);
	/* nid should be overridden as logical node id later */
	node_cpuid[srat_num_cpus].nid = pa->proximity_domain;
	srat_num_cpus++;
}

void __init
acpi_numa_memory_affinity_init (struct acpi_table_memory_affinity *ma)
{
	unsigned long paddr, size;
	u8 pxm;
	struct node_memblk_s *p, *q, *pend;

	pxm = ma->proximity_domain;

	/* fill node memory chunk structure */
	paddr = ma->base_addr_hi;
	paddr = (paddr << 32) | ma->base_addr_lo;
	size = ma->length_hi;
	size = (size << 32) | ma->length_lo;

	/* Ignore disabled entries */
	if (!ma->flags.enabled)
		return;

	/* record this node in proximity bitmap */
	pxm_bit_set(pxm);

	/* Insertion sort based on base address */
	pend = &node_memblk[num_node_memblks];
	for (p = &node_memblk[0]; p < pend; p++) {
		if (paddr < p->start_paddr)
			break;
	}
	if (p < pend) {
		for (q = pend - 1; q >= p; q--)
			*(q + 1) = *q;
	}
	p->start_paddr = paddr;
	p->size = size;
	p->nid = pxm;
	num_node_memblks++;
}

static unsigned int numnodes;
void __init
acpi_numa_arch_fixup (void)
{
	int i, j, node_from, node_to;

	/* If there's no SRAT, fix the phys_id */
	if (srat_num_cpus == 0) {
		node_cpuid[0].phys_id = hard_smp_processor_id();
		return;
	}

	/* calculate total number of nodes in system from PXM bitmap */
	numnodes = 0;		/* init total nodes in system */

	memset(pxm_to_nid_map, PXM_INVAL, sizeof(pxm_to_nid_map));
	memset(nid_to_pxm_map, NID_INVAL, sizeof(nid_to_pxm_map));
	for (i = 0; i < MAX_PXM_DOMAINS; i++) {
		if (pxm_bit_test(i)) {
			pxm_to_nid_map[i] = numnodes;
			node_set_online(numnodes);
			nid_to_pxm_map[numnodes++] = i;
		}
	}

	/* set logical node id in memory chunk structure */
	for (i = 0; i < num_node_memblks; i++)
		node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid];

	/* assign memory bank numbers for each chunk on each node */
	for (i = 0; i < numnodes; i++) {
		int bank;

		bank = 0;
		for (j = 0; j < num_node_memblks; j++)
			if (node_memblk[j].nid == i)
				node_memblk[j].bank = bank++;
	}

	/* set logical node id in cpu structure */
	for (i = 0; i < srat_num_cpus; i++)
		node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid];

	printk(KERN_INFO "Number of logical nodes in system = %d\n", numnodes);
	printk(KERN_INFO "Number of memory chunks in system = %d\n", num_node_memblks);

	if (!slit_table) return;
	memset(numa_slit, -1, sizeof(numa_slit));
	for (i=0; i<slit_table->localities; i++) {
		if (!pxm_bit_test(i))
			continue;
		node_from = pxm_to_nid_map[i];
		for (j=0; j<slit_table->localities; j++) {
			if (!pxm_bit_test(j))
				continue;
			node_to = pxm_to_nid_map[j];
			node_distance(node_from, node_to) =
				slit_table->entry[i*slit_table->localities + j];
		}
	}

#ifdef SLIT_DEBUG
	printk("ACPI 2.0 SLIT locality table:\n");
	for (i = 0; i < numnodes; i++) {
		for (j = 0; j < numnodes; j++)
			printk("%03d ", node_distance(i,j));
		printk("\n");
	}
#endif
}
#endif /* CONFIG_ACPI_NUMA */

#if 0
unsigned int
acpi_register_gsi (u32 gsi, int polarity, int trigger)
{
	return acpi_register_irq(gsi, polarity, trigger);
}
EXPORT_SYMBOL(acpi_register_gsi);
#endif
static int __init
acpi_parse_fadt (unsigned long phys_addr, unsigned long size)
{
	struct acpi_table_header *fadt_header;
	struct fadt_descriptor_rev2 *fadt;

	if (!phys_addr || !size)
		return -EINVAL;

	fadt_header = (struct acpi_table_header *) __va(phys_addr);
	if (fadt_header->revision != 3)
		return -ENODEV;		/* Only deal with ACPI 2.0 FADT */

	fadt = (struct fadt_descriptor_rev2 *) fadt_header;

	if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
		acpi_kbd_controller_present = 0;

	if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
		acpi_legacy_devices = 1;

#if 0
	acpi_register_gsi(fadt->sci_int, ACPI_ACTIVE_LOW, ACPI_LEVEL_SENSITIVE);
#endif
	return 0;
}

unsigned long __init
acpi_find_rsdp (void)
{
	unsigned long rsdp_phys = 0;

	if (efi.acpi20)
		rsdp_phys = __pa(efi.acpi20);
	else if (efi.acpi)
		printk(KERN_WARNING PREFIX "v1.0/r0.71 tables no longer supported\n");
	return rsdp_phys;
}

int __init
acpi_boot_init (void)
{

	/*
	 * MADT
	 * ----
	 * Parse the Multiple APIC Description Table (MADT), if exists.
	 * Note that this table provides platform SMP configuration
	 * information -- the successor to MPS tables.
	 */

	if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
		printk(KERN_ERR PREFIX "Can't find MADT\n");
		goto skip_madt;
	}

	/* Local APIC */

	if (acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
		printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");

	if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS) < 1)
		printk(KERN_ERR PREFIX "Error parsing MADT - no LSAPIC entries\n");

	if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0) < 0)
		printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");

	/* I/O APIC */

	if (acpi_table_parse_madt(ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
		printk(KERN_ERR PREFIX "Error parsing MADT - no IOSAPIC entries\n");

	/* System-Level Interrupt Routing */

	if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src, ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
		printk(KERN_ERR PREFIX "Error parsing platform interrupt source entry\n");

	if (acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
		printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");

	if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
		printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
  skip_madt:

	/*
	 * FADT says whether a legacy keyboard controller is present.
	 * The FADT also contains an SCI_INT line, by which the system
	 * gets interrupts such as power and sleep buttons.  If it's not
	 * on a Legacy interrupt, it needs to be setup.
	 */
	if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
		printk(KERN_ERR PREFIX "Can't find FADT\n");

#ifdef CONFIG_SMP
	if (available_cpus == 0) {
		printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
		printk(KERN_INFO "CPU 0 (0x%04x)\n", hard_smp_processor_id());
		smp_boot_data.cpu_phys_id[available_cpus] = hard_smp_processor_id();
		available_cpus = 1; /* We've got at least one of these, no? */
	}
	smp_boot_data.cpu_count = available_cpus;

	smp_build_cpu_map();
# ifdef CONFIG_ACPI_NUMA
	if (srat_num_cpus == 0) {
		int cpu, i = 1;
		for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
			if (smp_boot_data.cpu_phys_id[cpu] != hard_smp_processor_id())
				node_cpuid[i++].phys_id = smp_boot_data.cpu_phys_id[cpu];
	}
	build_cpu_to_node_map();
# endif
#endif
	/* Make boot-up look pretty */
	printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, total_cpus);
	return 0;
}

int
acpi_gsi_to_irq (u32 gsi, unsigned int *irq)
{
	int vector;

	if (has_8259 && gsi < 16)
		*irq = isa_irq_to_vector(gsi);
	else {
		vector = gsi_to_vector(gsi);
		if (vector == -1)
			return -1;

		*irq = vector;
	}
	return 0;
}
#if 0
int
acpi_register_irq (u32 gsi, u32 polarity, u32 trigger)
{
	if (has_8259 && gsi < 16)
		return isa_irq_to_vector(gsi);

	return iosapic_register_intr(gsi,
			(polarity == ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
			(trigger == ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
}
EXPORT_SYMBOL(acpi_register_irq);
#endif
#endif /* CONFIG_ACPI_BOOT */