acpi.c

xen虚拟机源代码安装包

#ifdef XEN
	struct acpi_srat_mem_affinity *ma =
		(struct acpi_srat_mem_affinity *)ma__;
#endif
	unsigned long paddr, size;
	int pxm;
	struct node_memblk_s *p, *q, *pend;

	pxm = get_memory_proximity_domain(ma);

	/* fill node memory chunk structure */
	paddr = ma->base_address;
	size = ma->length;

	/* Ignore disabled entries */
	if (!(ma->flags & ACPI_SRAT_MEM_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++;
}

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

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

	/*
	 * MCD - This can probably be dropped now.  No need for pxm ID to node ID
	 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
	 */
	nodes_clear(node_online_map);
	for (i = 0; i < MAX_PXM_DOMAINS; i++) {
		if (pxm_bit_test(i)) {
			int nid = acpi_map_pxm_to_node(i);
			node_set_online(nid);
		}
	}

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

	/* assign memory bank numbers for each chunk on each node */
	for_each_online_node(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_each_possible_early_cpu(i)
		node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);

	printk(KERN_INFO "Number of logical nodes in system = %d\n",
	       num_online_nodes());
	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->locality_count; i++) {
		if (!pxm_bit_test(i))
			continue;
		node_from = pxm_to_node(i);
		for (j = 0; j < slit_table->locality_count; j++) {
			if (!pxm_bit_test(j))
				continue;
			node_to = pxm_to_node(j);
			node_distance(node_from, node_to) =
			    slit_table->entry[i * slit_table->locality_count + j];
		}
	}

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

#ifndef XEN
/*
 * success: return IRQ number (>=0)
 * failure: return < 0
 */
int acpi_register_gsi(u32 gsi, int triggering, int polarity)
{
	if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
		return gsi;

	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,
				     (triggering ==
				      ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
				     IOSAPIC_LEVEL);
}

void acpi_unregister_gsi(u32 gsi)
{
	if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
		return;

	if (has_8259 && gsi < 16)
		return;

	iosapic_unregister_intr(gsi);
}
#endif

static int __init acpi_parse_fadt(struct acpi_table_header *table)
{
	struct acpi_table_header *fadt_header;
	struct acpi_table_fadt *fadt;

	if (!table)
		return -EINVAL;

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

	fadt = (struct acpi_table_fadt *)fadt_header;

#ifndef XEN
	acpi_register_gsi(fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
#endif
	return 0;
}

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_SIG_MADT, acpi_parse_madt)) {
		printk(KERN_ERR PREFIX "Can't find MADT\n");
		goto skip_madt;
	}

	/* Local APIC */

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

	if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_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_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
		if (!ia64_platform_is("sn2"))
			printk(KERN_ERR PREFIX
			       "Error parsing MADT - no IOSAPIC entries\n");
	}

	/* System-Level Interrupt Routing */

	if (acpi_table_parse_madt
	    (ACPI_MADT_TYPE_INTERRUPT_SOURCE, 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_TYPE_INTERRUPT_OVERRIDE, 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_TYPE_NMI_SOURCE, 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_SIG_FADT, acpi_parse_fadt))
		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)", 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];
	}
# endif
#endif
#ifdef CONFIG_ACPI_NUMA
	build_cpu_to_node_map();
#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 tmp;

	if (has_8259 && gsi < 16)
		*irq = isa_irq_to_vector(gsi);
	else {
		tmp = gsi_to_irq(gsi);
		if (tmp == -1)
			return -1;
		*irq = tmp;
	}
	return 0;
}

/*
 *  ACPI based hotplug CPU support
 */
#ifdef CONFIG_ACPI_HOTPLUG_CPU
static
int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
{
#ifdef CONFIG_ACPI_NUMA
	int pxm_id;
	int nid;

	pxm_id = acpi_get_pxm(handle);
	/*
	 * We don't have cpu-only-node hotadd. But if the system equips
	 * SRAT table, pxm is already found and node is ready.
  	 * So, just pxm_to_nid(pxm) is OK.
	 * This code here is for the system which doesn't have full SRAT
  	 * table for possible cpus.
	 */
	nid = acpi_map_pxm_to_node(pxm_id);
	node_cpuid[cpu].phys_id = physid;
	node_cpuid[cpu].nid = nid;
#endif
	return (0);
}

int additional_cpus __initdata = -1;

static __init int setup_additional_cpus(char *s)
{
	if (s)
		additional_cpus = simple_strtol(s, NULL, 0);

	return 0;
}

early_param("additional_cpus", setup_additional_cpus);

/*
 * cpu_possible_map should be static, it cannot change as CPUs
 * are onlined, or offlined. The reason is per-cpu data-structures
 * are allocated by some modules at init time, and dont expect to
 * do this dynamically on cpu arrival/departure.
 * cpu_present_map on the other hand can change dynamically.
 * In case when cpu_hotplug is not compiled, then we resort to current
 * behaviour, which is cpu_possible == cpu_present.
 * - Ashok Raj
 *
 * Three ways to find out the number of additional hotplug CPUs:
 * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
 * - The user can overwrite it with additional_cpus=NUM
 * - Otherwise don't reserve additional CPUs.
 */
__init void prefill_possible_map(void)
{
	int i;
	int possible, disabled_cpus;

	disabled_cpus = total_cpus - available_cpus;

 	if (additional_cpus == -1) {
 		if (disabled_cpus > 0)
			additional_cpus = disabled_cpus;
 		else
			additional_cpus = 0;
 	}

	possible = available_cpus + additional_cpus;

	if (possible > NR_CPUS)
		possible = NR_CPUS;

	printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
		possible, max((possible - available_cpus), 0));

	for (i = 0; i < possible; i++)
		cpu_set(i, cpu_possible_map);
}

#ifndef XEN
int acpi_map_lsapic(acpi_handle handle, int *pcpu)
{
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	struct acpi_madt_local_sapic *lsapic;
	cpumask_t tmp_map;
	long physid;
	int cpu;

	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
		return -EINVAL;

	if (!buffer.length || !buffer.pointer)
		return -EINVAL;

	obj = buffer.pointer;
	if (obj->type != ACPI_TYPE_BUFFER)
	{
		kfree(buffer.pointer);
		return -EINVAL;
	}

	lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;

	if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
	    (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
		kfree(buffer.pointer);
		return -EINVAL;
	}

	physid = ((lsapic->id << 8) | (lsapic->eid));

	kfree(buffer.pointer);
	buffer.length = ACPI_ALLOCATE_BUFFER;
	buffer.pointer = NULL;

	cpus_complement(tmp_map, cpu_present_map);
	cpu = first_cpu(tmp_map);
	if (cpu >= NR_CPUS)
		return -EINVAL;

	acpi_map_cpu2node(handle, cpu, physid);

	cpu_set(cpu, cpu_present_map);
	ia64_cpu_to_sapicid[cpu] = physid;

	*pcpu = cpu;
	return (0);
}

EXPORT_SYMBOL(acpi_map_lsapic);

int acpi_unmap_lsapic(int cpu)
{
	ia64_cpu_to_sapicid[cpu] = -1;
	cpu_clear(cpu, cpu_present_map);

#ifdef CONFIG_ACPI_NUMA
	/* NUMA specific cleanup's */
#endif

	return (0);
}

EXPORT_SYMBOL(acpi_unmap_lsapic);
#endif /* XEN */
#endif				/* CONFIG_ACPI_HOTPLUG_CPU */

#ifndef XEN
#ifdef CONFIG_ACPI_NUMA
static acpi_status __devinit
acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
{
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	struct acpi_madt_io_sapic *iosapic;
	unsigned int gsi_base;
	int pxm, node;

	/* Only care about objects w/ a method that returns the MADT */
	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
		return AE_OK;

	if (!buffer.length || !buffer.pointer)
		return AE_OK;

	obj = buffer.pointer;
	if (obj->type != ACPI_TYPE_BUFFER ||
	    obj->buffer.length < sizeof(*iosapic)) {
		kfree(buffer.pointer);
		return AE_OK;
	}

	iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;

	if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
		kfree(buffer.pointer);
		return AE_OK;
	}

	gsi_base = iosapic->global_irq_base;

	kfree(buffer.pointer);

	/*
	 * OK, it's an IOSAPIC MADT entry, look for a _PXM value to tell
	 * us which node to associate this with.
	 */
	pxm = acpi_get_pxm(handle);
	if (pxm < 0)
		return AE_OK;

	node = pxm_to_node(pxm);

	if (node >= MAX_NUMNODES || !node_online(node) ||
	    cpus_empty(node_to_cpumask(node)))
		return AE_OK;

	/* We know a gsi to node mapping! */
	map_iosapic_to_node(gsi_base, node);
	return AE_OK;
}

static int __init
acpi_map_iosapics (void)
{
	acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
	return 0;
}

fs_initcall(acpi_map_iosapics);
#endif				/* CONFIG_ACPI_NUMA */

int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
{
	int err;

	if ((err = iosapic_init(phys_addr, gsi_base)))
		return err;

#ifdef CONFIG_ACPI_NUMA
	acpi_map_iosapic(handle, 0, NULL, NULL);
#endif				/* CONFIG_ACPI_NUMA */

	return 0;
}

EXPORT_SYMBOL(acpi_register_ioapic);

int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
{
	return iosapic_remove(gsi_base);
}

EXPORT_SYMBOL(acpi_unregister_ioapic);
#endif /* XEN */

/*
 * acpi_save_state_mem() - save kernel state
 *
 * TBD when when IA64 starts to support suspend...
 */
int acpi_save_state_mem(void) { return 0; } 

/*
 * acpi_restore_state()
 */
void acpi_restore_state_mem(void) {}

/*
 * do_suspend_lowlevel()
 */
void do_suspend_lowlevel(void) {}

#endif				/* CONFIG_ACPI */