X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Facpi%2Fprocessor_core.c;h=f7de02a6f497a5d61752dff2a413a7c7b4c9f43a;hb=7b1d5c0b604df6cee31b2c0160ede3f1311fbb66;hp=d56a439ac614f4931c6b86fab438396bf72dc4c9;hpb=5028770a42e7bc4d15791a44c28f0ad539323807;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index d56a439..f7de02a 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -58,10 +58,8 @@
 #include <acpi/acpi_drivers.h>
 #include <acpi/processor.h>
 
-
 #define ACPI_PROCESSOR_COMPONENT	0x01000000
 #define ACPI_PROCESSOR_CLASS		"processor"
-#define ACPI_PROCESSOR_DRIVER_NAME	"ACPI Processor Driver"
 #define ACPI_PROCESSOR_DEVICE_NAME	"Processor"
 #define ACPI_PROCESSOR_FILE_INFO	"info"
 #define ACPI_PROCESSOR_FILE_THROTTLING	"throttling"
@@ -72,67 +70,58 @@
 #define ACPI_PROCESSOR_LIMIT_USER	0
 #define ACPI_PROCESSOR_LIMIT_THERMAL	1
 
-#define ACPI_STA_PRESENT 0x00000001
-
 #define _COMPONENT		ACPI_PROCESSOR_COMPONENT
-ACPI_MODULE_NAME		("acpi_processor")
+ACPI_MODULE_NAME("processor_core");
 
 MODULE_AUTHOR("Paul Diefenbaugh");
-MODULE_DESCRIPTION(ACPI_PROCESSOR_DRIVER_NAME);
+MODULE_DESCRIPTION("ACPI Processor Driver");
 MODULE_LICENSE("GPL");
 
-
-static int acpi_processor_add (struct acpi_device *device);
-static int acpi_processor_start (struct acpi_device *device);
-static int acpi_processor_remove (struct acpi_device *device, int type);
+static int acpi_processor_add(struct acpi_device *device);
+static int acpi_processor_start(struct acpi_device *device);
+static int acpi_processor_remove(struct acpi_device *device, int type);
 static int acpi_processor_info_open_fs(struct inode *inode, struct file *file);
-static void acpi_processor_notify ( acpi_handle	handle, u32 event, void *data);
+static void acpi_processor_notify(acpi_handle handle, u32 event, void *data);
 static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu);
 static int acpi_processor_handle_eject(struct acpi_processor *pr);
 
 static struct acpi_driver acpi_processor_driver = {
-	.name =		ACPI_PROCESSOR_DRIVER_NAME,
-	.class =	ACPI_PROCESSOR_CLASS,
-	.ids =		ACPI_PROCESSOR_HID,
-	.ops =		{
-				.add =		acpi_processor_add,
-				.remove =	acpi_processor_remove,
-				.start	= 	acpi_processor_start,
-			},
+	.name = "processor",
+	.class = ACPI_PROCESSOR_CLASS,
+	.ids = ACPI_PROCESSOR_HID,
+	.ops = {
+		.add = acpi_processor_add,
+		.remove = acpi_processor_remove,
+		.start = acpi_processor_start,
+		},
 };
 
 #define INSTALL_NOTIFY_HANDLER		1
 #define UNINSTALL_NOTIFY_HANDLER	2
 
-
-static struct file_operations acpi_processor_info_fops = {
-	.open 		= acpi_processor_info_open_fs,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
+static const struct file_operations acpi_processor_info_fops = {
+	.open = acpi_processor_info_open_fs,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
 };
 
-
-struct acpi_processor	*processors[NR_CPUS];
-struct acpi_processor_errata errata;
-
+struct acpi_processor *processors[NR_CPUS];
+struct acpi_processor_errata errata __read_mostly;
 
 /* --------------------------------------------------------------------------
                                 Errata Handling
    -------------------------------------------------------------------------- */
 
-static int
-acpi_processor_errata_piix4 (
-	struct pci_dev		*dev)
+static int acpi_processor_errata_piix4(struct pci_dev *dev)
 {
-	u8			rev = 0;
-	u8			value1 = 0;
-	u8			value2 = 0;
+	u8 rev = 0;
+	u8 value1 = 0;
+	u8 value2 = 0;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_errata_piix4");
 
 	if (!dev)
-		return_VALUE(-EINVAL);
+		return -EINVAL;
 
 	/*
 	 * Note that 'dev' references the PIIX4 ACPI Controller.
@@ -188,8 +177,8 @@ acpi_processor_errata_piix4 (
 		 * DMA activity.
 		 */
 		dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
-		           PCI_DEVICE_ID_INTEL_82371AB,
-                           PCI_ANY_ID, PCI_ANY_ID, NULL);
+				     PCI_DEVICE_ID_INTEL_82371AB,
+				     PCI_ANY_ID, PCI_ANY_ID, NULL);
 		if (dev) {
 			errata.piix4.bmisx = pci_resource_start(dev, 4);
 			pci_dev_put(dev);
@@ -205,8 +194,8 @@ acpi_processor_errata_piix4 (
 		 * devices won't operate well if fast DMA is disabled.
 		 */
 		dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
-			PCI_DEVICE_ID_INTEL_82371AB_0,
-			PCI_ANY_ID, PCI_ANY_ID, NULL);
+				     PCI_DEVICE_ID_INTEL_82371AB_0,
+				     PCI_ANY_ID, PCI_ANY_ID, NULL);
 		if (dev) {
 			pci_read_config_byte(dev, 0x76, &value1);
 			pci_read_config_byte(dev, 0x77, &value2);
@@ -220,140 +209,118 @@ acpi_processor_errata_piix4 (
 
 	if (errata.piix4.bmisx)
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"Bus master activity detection (BM-IDE) erratum enabled\n"));
+				  "Bus master activity detection (BM-IDE) erratum enabled\n"));
 	if (errata.piix4.fdma)
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"Type-F DMA livelock erratum (C3 disabled)\n"));
+				  "Type-F DMA livelock erratum (C3 disabled)\n"));
 
-	return_VALUE(0);
+	return 0;
 }
 
-
-int
-acpi_processor_errata (
-	struct acpi_processor	*pr)
+static int acpi_processor_errata(struct acpi_processor *pr)
 {
-	int			result = 0;
-	struct pci_dev		*dev = NULL;
+	int result = 0;
+	struct pci_dev *dev = NULL;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_errata");
 
 	if (!pr)
-		return_VALUE(-EINVAL);
+		return -EINVAL;
 
 	/*
 	 * PIIX4
 	 */
 	dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
-		PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, PCI_ANY_ID, NULL);
+			     PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID,
+			     PCI_ANY_ID, NULL);
 	if (dev) {
 		result = acpi_processor_errata_piix4(dev);
 		pci_dev_put(dev);
 	}
 
-	return_VALUE(result);
+	return result;
 }
 
-
 /* --------------------------------------------------------------------------
-                              Common ACPI processor fucntions
+                              Common ACPI processor functions
    -------------------------------------------------------------------------- */
 
 /*
  * _PDC is required for a BIOS-OS handshake for most of the newer
  * ACPI processor features.
  */
-
-int acpi_processor_set_pdc(struct acpi_processor *pr,
-				struct acpi_object_list *pdc_in)
+static int acpi_processor_set_pdc(struct acpi_processor *pr)
 {
-	acpi_status		status = AE_OK;
-	u32			arg0_buf[3];
-	union acpi_object	arg0 = {ACPI_TYPE_BUFFER};
-	struct acpi_object_list	no_object = {1, &arg0};
-	struct acpi_object_list	*pdc;
+	struct acpi_object_list *pdc_in = pr->pdc;
+	acpi_status status = AE_OK;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_set_pdc");
 
-	arg0.buffer.length = 12;
-	arg0.buffer.pointer = (u8 *) arg0_buf;
-	arg0_buf[0] = ACPI_PDC_REVISION_ID;
-	arg0_buf[1] = 0;
-	arg0_buf[2] = 0;
+	if (!pdc_in)
+		return status;
 
-	pdc = (pdc_in) ? pdc_in : &no_object;
+	status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL);
 
-	status = acpi_evaluate_object(pr->handle, "_PDC", pdc, NULL);
-
-	if ((ACPI_FAILURE(status)) && (pdc_in))
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Error evaluating _PDC, using legacy perf. control...\n"));
+	if (ACPI_FAILURE(status))
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+		    "Could not evaluate _PDC, using legacy perf. control...\n"));
 
-	return_VALUE(status);
+	return status;
 }
 
-
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
 
-static struct proc_dir_entry	*acpi_processor_dir = NULL;
+static struct proc_dir_entry *acpi_processor_dir = NULL;
 
 static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset)
 {
-	struct acpi_processor	*pr = (struct acpi_processor *)seq->private;
+	struct acpi_processor *pr = seq->private;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_info_seq_show");
 
 	if (!pr)
 		goto end;
 
 	seq_printf(seq, "processor id:            %d\n"
-			"acpi id:                 %d\n"
-			"bus mastering control:   %s\n"
-			"power management:        %s\n"
-			"throttling control:      %s\n"
-			"limit interface:         %s\n",
-			pr->id,
-			pr->acpi_id,
-			pr->flags.bm_control ? "yes" : "no",
-			pr->flags.power ? "yes" : "no",
-			pr->flags.throttling ? "yes" : "no",
-			pr->flags.limit ? "yes" : "no");
-
-end:
-	return_VALUE(0);
+		   "acpi id:                 %d\n"
+		   "bus mastering control:   %s\n"
+		   "power management:        %s\n"
+		   "throttling control:      %s\n"
+		   "limit interface:         %s\n",
+		   pr->id,
+		   pr->acpi_id,
+		   pr->flags.bm_control ? "yes" : "no",
+		   pr->flags.power ? "yes" : "no",
+		   pr->flags.throttling ? "yes" : "no",
+		   pr->flags.limit ? "yes" : "no");
+
+      end:
+	return 0;
 }
 
 static int acpi_processor_info_open_fs(struct inode *inode, struct file *file)
 {
 	return single_open(file, acpi_processor_info_seq_show,
-						PDE(inode)->data);
+			   PDE(inode)->data);
 }
 
-
-static int
-acpi_processor_add_fs (
-	struct acpi_device	*device)
+static int acpi_processor_add_fs(struct acpi_device *device)
 {
-	struct proc_dir_entry	*entry = NULL;
+	struct proc_dir_entry *entry = NULL;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_add_fs");
 
 	if (!acpi_device_dir(device)) {
 		acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
-			acpi_processor_dir);
+						     acpi_processor_dir);
 		if (!acpi_device_dir(device))
-			return_VALUE(-ENODEV);
+			return -ENODEV;
 	}
 	acpi_device_dir(device)->owner = THIS_MODULE;
 
 	/* 'info' [R] */
 	entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO,
-		S_IRUGO, acpi_device_dir(device));
+				  S_IRUGO, acpi_device_dir(device));
 	if (!entry)
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-			"Unable to create '%s' fs entry\n",
-			ACPI_PROCESSOR_FILE_INFO));
+		return -EIO;
 	else {
 		entry->proc_fops = &acpi_processor_info_fops;
 		entry->data = acpi_driver_data(device);
@@ -362,79 +329,169 @@ acpi_processor_add_fs (
 
 	/* 'throttling' [R/W] */
 	entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING,
-		S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
+				  S_IFREG | S_IRUGO | S_IWUSR,
+				  acpi_device_dir(device));
 	if (!entry)
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-			"Unable to create '%s' fs entry\n",
-			ACPI_PROCESSOR_FILE_THROTTLING));
+		return -EIO;
 	else {
 		entry->proc_fops = &acpi_processor_throttling_fops;
-		entry->proc_fops->write = acpi_processor_write_throttling;
 		entry->data = acpi_driver_data(device);
 		entry->owner = THIS_MODULE;
 	}
 
 	/* 'limit' [R/W] */
 	entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT,
-		S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
+				  S_IFREG | S_IRUGO | S_IWUSR,
+				  acpi_device_dir(device));
 	if (!entry)
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-			"Unable to create '%s' fs entry\n",
-			ACPI_PROCESSOR_FILE_LIMIT));
+		return -EIO;
 	else {
 		entry->proc_fops = &acpi_processor_limit_fops;
-		entry->proc_fops->write = acpi_processor_write_limit;
 		entry->data = acpi_driver_data(device);
 		entry->owner = THIS_MODULE;
 	}
 
-	return_VALUE(0);
+	return 0;
 }
 
-
-static int
-acpi_processor_remove_fs (
-	struct acpi_device	*device)
+static int acpi_processor_remove_fs(struct acpi_device *device)
 {
-	ACPI_FUNCTION_TRACE("acpi_processor_remove_fs");
 
 	if (acpi_device_dir(device)) {
-		remove_proc_entry(ACPI_PROCESSOR_FILE_INFO,acpi_device_dir(device));
+		remove_proc_entry(ACPI_PROCESSOR_FILE_INFO,
+				  acpi_device_dir(device));
 		remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING,
-			acpi_device_dir(device));
-		remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT,acpi_device_dir(device));
+				  acpi_device_dir(device));
+		remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT,
+				  acpi_device_dir(device));
 		remove_proc_entry(acpi_device_bid(device), acpi_processor_dir);
 		acpi_device_dir(device) = NULL;
 	}
 
-	return_VALUE(0);
+	return 0;
 }
 
 /* Use the acpiid in MADT to map cpus in case of SMP */
+
 #ifndef CONFIG_SMP
-#define convert_acpiid_to_cpu(acpi_id) (0xff)
+static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;}
 #else
 
+static struct acpi_table_madt *madt;
+
+static int map_lapic_id(struct acpi_subtable_header *entry,
+		 u32 acpi_id, int *apic_id)
+{
+	struct acpi_madt_local_apic *lapic =
+		(struct acpi_madt_local_apic *)entry;
+	if ((lapic->lapic_flags & ACPI_MADT_ENABLED) &&
+	    lapic->processor_id == acpi_id) {
+		*apic_id = lapic->id;
+		return 1;
+	}
+	return 0;
+}
+
+static int map_lsapic_id(struct acpi_subtable_header *entry,
+		  u32 acpi_id, int *apic_id)
+{
+	struct acpi_madt_local_sapic *lsapic =
+		(struct acpi_madt_local_sapic *)entry;
+	/* Only check enabled APICs*/
+	if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
+		/* First check against id */
+		if (lsapic->processor_id == acpi_id) {
+			*apic_id = (lsapic->id << 8) | lsapic->eid;
+			return 1;
+		/* Check against optional uid */
+		} else if (entry->length >= 16 &&
+			lsapic->uid == acpi_id) {
+			*apic_id = lsapic->uid;
+			return 1;
+		}
+	}
+	return 0;
+}
+
 #ifdef CONFIG_IA64
-#define arch_acpiid_to_apicid 	ia64_acpiid_to_sapicid
 #define arch_cpu_to_apicid 	ia64_cpu_to_sapicid
-#define ARCH_BAD_APICID		(0xffff)
 #else
-#define arch_acpiid_to_apicid 	x86_acpiid_to_apicid
 #define arch_cpu_to_apicid 	x86_cpu_to_apicid
-#define ARCH_BAD_APICID		(0xff)
 #endif
 
-static u8 convert_acpiid_to_cpu(u8 acpi_id)
+static int map_madt_entry(u32 acpi_id)
+{
+	unsigned long madt_end, entry;
+	int apic_id = -1;
+
+	if (!madt)
+		return apic_id;
+
+	entry = (unsigned long)madt;
+	madt_end = entry + madt->header.length;
+
+	/* Parse all entries looking for a match. */
+
+	entry += sizeof(struct acpi_table_madt);
+	while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
+		struct acpi_subtable_header *header =
+			(struct acpi_subtable_header *)entry;
+		if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
+			if (map_lapic_id(header, acpi_id, &apic_id))
+				break;
+		} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
+			if (map_lsapic_id(header, acpi_id, &apic_id))
+				break;
+		}
+		entry += header->length;
+	}
+	return apic_id;
+}
+
+static int map_mat_entry(acpi_handle handle, u32 acpi_id)
+{
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *obj;
+	struct acpi_subtable_header *header;
+	int apic_id = -1;
+
+	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
+		goto exit;
+
+	if (!buffer.length || !buffer.pointer)
+		goto exit;
+
+	obj = buffer.pointer;
+	if (obj->type != ACPI_TYPE_BUFFER ||
+	    obj->buffer.length < sizeof(struct acpi_subtable_header)) {
+		goto exit;
+	}
+
+	header = (struct acpi_subtable_header *)obj->buffer.pointer;
+	if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
+		map_lapic_id(header, acpi_id, &apic_id);
+	} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
+		map_lsapic_id(header, acpi_id, &apic_id);
+	}
+
+exit:
+	if (buffer.pointer)
+		kfree(buffer.pointer);
+	return apic_id;
+}
+
+static int get_cpu_id(acpi_handle handle, u32 acpi_id)
 {
-	u16 apic_id;
 	int i;
+	int apic_id = -1;
 
-	apic_id = arch_acpiid_to_apicid[acpi_id];
-	if (apic_id == ARCH_BAD_APICID)
-		return -1;
+	apic_id = map_mat_entry(handle, acpi_id);
+	if (apic_id == -1)
+		apic_id = map_madt_entry(acpi_id);
+	if (apic_id == -1)
+		return apic_id;
 
-	for (i = 0; i < NR_CPUS; i++) {
+	for (i = 0; i < NR_CPUS; ++i) {
 		if (arch_cpu_to_apicid[i] == apic_id)
 			return i;
 	}
@@ -446,20 +503,17 @@ static u8 convert_acpiid_to_cpu(u8 acpi_id)
                                  Driver Interface
    -------------------------------------------------------------------------- */
 
-static int
-acpi_processor_get_info (
-	struct acpi_processor	*pr)
+static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid)
 {
-	acpi_status		status = 0;
-	union acpi_object	object = {0};
-	struct acpi_buffer	buffer = {sizeof(union acpi_object), &object};
-	u8			cpu_index;
-	static int		cpu0_initialized;
+	acpi_status status = 0;
+	union acpi_object object = { 0 };
+	struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
+	int cpu_index;
+	static int cpu0_initialized;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_get_info");
 
 	if (!pr)
-		return_VALUE(-EINVAL);
+		return -EINVAL;
 
 	if (num_online_cpus() > 1)
 		errata.smp = TRUE;
@@ -470,71 +524,78 @@ acpi_processor_get_info (
 	 * Check to see if we have bus mastering arbitration control.  This
 	 * is required for proper C3 usage (to maintain cache coherency).
 	 */
-	if (acpi_fadt.V1_pm2_cnt_blk && acpi_fadt.pm2_cnt_len) {
+	if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) {
 		pr->flags.bm_control = 1;
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"Bus mastering arbitration control present\n"));
-	}
-	else
+				  "Bus mastering arbitration control present\n"));
+	} else
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"No bus mastering arbitration control\n"));
+				  "No bus mastering arbitration control\n"));
+
+	/* Check if it is a Device with HID and UID */
+	if (has_uid) {
+		unsigned long value;
+		status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID,
+						NULL, &value);
+		if (ACPI_FAILURE(status)) {
+			printk(KERN_ERR PREFIX "Evaluating processor _UID\n");
+			return -ENODEV;
+		}
+		pr->acpi_id = value;
+	} else {
+		/*
+		* Evalute the processor object.  Note that it is common on SMP to
+		* have the first (boot) processor with a valid PBLK address while
+		* all others have a NULL address.
+		*/
+		status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer);
+		if (ACPI_FAILURE(status)) {
+			printk(KERN_ERR PREFIX "Evaluating processor object\n");
+			return -ENODEV;
+		}
 
-	/*
-	 * Evalute the processor object.  Note that it is common on SMP to
-	 * have the first (boot) processor with a valid PBLK address while
-	 * all others have a NULL address.
-	 */
-	status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer);
-	if (ACPI_FAILURE(status)) {
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-			"Error evaluating processor object\n"));
-		return_VALUE(-ENODEV);
+		/*
+		* TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
+		*      >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c
+		*/
+		pr->acpi_id = object.processor.proc_id;
+	}
+	cpu_index = get_cpu_id(pr->handle, pr->acpi_id);
+
+	/* Handle UP system running SMP kernel, with no LAPIC in MADT */
+	if (!cpu0_initialized && (cpu_index == -1) &&
+	    (num_online_cpus() == 1)) {
+		cpu_index = 0;
 	}
 
+	cpu0_initialized = 1;
+
+	pr->id = cpu_index;
+
 	/*
-	 * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
-	 *	>>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c
+	 *  Extra Processor objects may be enumerated on MP systems with
+	 *  less than the max # of CPUs. They should be ignored _iff
+	 *  they are physically not present.
 	 */
-	pr->acpi_id = object.processor.proc_id;
-
-	cpu_index = convert_acpiid_to_cpu(pr->acpi_id);
-
-  	/* Handle UP system running SMP kernel, with no LAPIC in MADT */
-  	if ( !cpu0_initialized && (cpu_index == 0xff) &&
-  		       	(num_online_cpus() == 1)) {
-   		cpu_index = 0;
-   	}
-
-   	cpu0_initialized = 1;
-
-   	pr->id = cpu_index;
-
-  	/*
-  	 *  Extra Processor objects may be enumerated on MP systems with
-  	 *  less than the max # of CPUs. They should be ignored _iff
-  	 *  they are physically not present.
-  	 */
-   	if (cpu_index >=  NR_CPUS) {
-   		if (ACPI_FAILURE(acpi_processor_hotadd_init(pr->handle, &pr->id))) {
-   			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-   				"Error getting cpuindex for acpiid 0x%x\n",
-   				pr->acpi_id));
-   			return_VALUE(-ENODEV);
-   		}
-    	}
+	if (pr->id == -1) {
+		if (ACPI_FAILURE
+		    (acpi_processor_hotadd_init(pr->handle, &pr->id))) {
+			return -ENODEV;
+		}
+	}
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id,
-		pr->acpi_id));
+			  pr->acpi_id));
 
 	if (!object.processor.pblk_address)
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n"));
 	else if (object.processor.pblk_length != 6)
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid PBLK length [%d]\n",
-			object.processor.pblk_length));
+		printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n",
+			    object.processor.pblk_length);
 	else {
 		pr->throttling.address = object.processor.pblk_address;
-		pr->throttling.duty_offset = acpi_fadt.duty_offset;
-		pr->throttling.duty_width = acpi_fadt.duty_width;
+		pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset;
+		pr->throttling.duty_width = acpi_gbl_FADT.duty_width;
 
 		pr->pblk = object.processor.pblk_address;
 
@@ -554,29 +615,41 @@ acpi_processor_get_info (
 	acpi_processor_get_throttling_info(pr);
 	acpi_processor_get_limit_info(pr);
 
-	return_VALUE(0);
+	return 0;
 }
 
-static int
-acpi_processor_start(
-	struct acpi_device	*device)
+static void *processor_device_array[NR_CPUS];
+
+static int __cpuinit acpi_processor_start(struct acpi_device *device)
 {
-	int			result = 0;
-	acpi_status		status = AE_OK;
-	struct acpi_processor	*pr;
+	int result = 0;
+	acpi_status status = AE_OK;
+	struct acpi_processor *pr;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_start");
 
 	pr = acpi_driver_data(device);
 
-	result = acpi_processor_get_info(pr);
+	result = acpi_processor_get_info(pr, device->flags.unique_id);
 	if (result) {
 		/* Processor is physically not present */
-		return_VALUE(0);
+		return 0;
 	}
 
 	BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0));
 
+	/*
+	 * Buggy BIOS check
+	 * ACPI id of processors can be reported wrongly by the BIOS.
+	 * Don't trust it blindly
+	 */
+	if (processor_device_array[pr->id] != NULL &&
+	    processor_device_array[pr->id] != device) {
+		printk(KERN_WARNING "BIOS reported wrong ACPI id"
+			"for the processor\n");
+		return -ENODEV;
+	}
+	processor_device_array[pr->id] = device;
+
 	processors[pr->id] = pr;
 
 	result = acpi_processor_add_fs(device);
@@ -584,50 +657,43 @@ acpi_processor_start(
 		goto end;
 
 	status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY,
-		acpi_processor_notify, pr);
-	if (ACPI_FAILURE(status)) {
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-			"Error installing device notify handler\n"));
-	}
+					     acpi_processor_notify, pr);
+
+	/* _PDC call should be done before doing anything else (if reqd.). */
+	arch_acpi_processor_init_pdc(pr);
+	acpi_processor_set_pdc(pr);
 
 	acpi_processor_power_init(pr, device);
 
 	if (pr->flags.throttling) {
 		printk(KERN_INFO PREFIX "%s [%s] (supports",
-			acpi_device_name(device), acpi_device_bid(device));
+		       acpi_device_name(device), acpi_device_bid(device));
 		printk(" %d throttling states", pr->throttling.state_count);
 		printk(")\n");
 	}
 
-end:
+      end:
 
-	return_VALUE(result);
+	return result;
 }
 
-
-
-static void
-acpi_processor_notify (
-	acpi_handle		handle,
-	u32			event,
-	void			*data)
+static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct acpi_processor	*pr = (struct acpi_processor *) data;
-	struct acpi_device	*device = NULL;
+	struct acpi_processor *pr = data;
+	struct acpi_device *device = NULL;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_notify");
 
 	if (!pr)
-		return_VOID;
+		return;
 
 	if (acpi_bus_get_device(pr->handle, &device))
-		return_VOID;
+		return;
 
 	switch (event) {
 	case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
 		acpi_processor_ppc_has_changed(pr);
 		acpi_bus_generate_event(device, event,
-			pr->performance_platform_limit);
+					pr->performance_platform_limit);
 		break;
 	case ACPI_PROCESSOR_NOTIFY_POWER:
 		acpi_processor_cst_has_changed(pr);
@@ -635,72 +701,58 @@ acpi_processor_notify (
 		break;
 	default:
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"Unsupported event [0x%x]\n", event));
+				  "Unsupported event [0x%x]\n", event));
 		break;
 	}
 
-	return_VOID;
+	return;
 }
 
-
-static int
-acpi_processor_add (
-	struct acpi_device	*device)
+static int acpi_processor_add(struct acpi_device *device)
 {
-	struct acpi_processor	*pr = NULL;
+	struct acpi_processor *pr = NULL;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_add");
 
 	if (!device)
-		return_VALUE(-EINVAL);
+		return -EINVAL;
 
-	pr = kmalloc(sizeof(struct acpi_processor), GFP_KERNEL);
+	pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
 	if (!pr)
-		return_VALUE(-ENOMEM);
-	memset(pr, 0, sizeof(struct acpi_processor));
+		return -ENOMEM;
 
 	pr->handle = device->handle;
 	strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
 	strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
 	acpi_driver_data(device) = pr;
 
-	return_VALUE(0);
+	return 0;
 }
 
-
-static int
-acpi_processor_remove (
-	struct acpi_device	*device,
-	int			type)
+static int acpi_processor_remove(struct acpi_device *device, int type)
 {
-	acpi_status		status = AE_OK;
-	struct acpi_processor	*pr = NULL;
+	acpi_status status = AE_OK;
+	struct acpi_processor *pr = NULL;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_remove");
 
 	if (!device || !acpi_driver_data(device))
-		return_VALUE(-EINVAL);
+		return -EINVAL;
 
-	pr = (struct acpi_processor *) acpi_driver_data(device);
+	pr = acpi_driver_data(device);
 
 	if (pr->id >= NR_CPUS) {
 		kfree(pr);
-		return_VALUE(0);
+		return 0;
 	}
 
 	if (type == ACPI_BUS_REMOVAL_EJECT) {
 		if (acpi_processor_handle_eject(pr))
-			return_VALUE(-EINVAL);
+			return -EINVAL;
 	}
 
 	acpi_processor_power_exit(pr, device);
 
 	status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY,
-		acpi_processor_notify);
-	if (ACPI_FAILURE(status)) {
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-			"Error removing notify handler\n"));
-	}
+					    acpi_processor_notify);
 
 	acpi_processor_remove_fs(device);
 
@@ -708,7 +760,7 @@ acpi_processor_remove (
 
 	kfree(pr);
 
-	return_VALUE(0);
+	return 0;
 }
 
 #ifdef CONFIG_ACPI_HOTPLUG_CPU
@@ -718,79 +770,66 @@ acpi_processor_remove (
 
 static int is_processor_present(acpi_handle handle);
 
-static int
-is_processor_present(
-	acpi_handle handle)
+static int is_processor_present(acpi_handle handle)
 {
-	acpi_status 		status;
-	unsigned long		sta = 0;
+	acpi_status status;
+	unsigned long sta = 0;
 
-	ACPI_FUNCTION_TRACE("is_processor_present");
 
 	status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
-	if (ACPI_FAILURE(status) || !(sta & ACPI_STA_PRESENT)) {
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-			"Processor Device is not present\n"));
-		return_VALUE(0);
+	if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) {
+		ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present"));
+		return 0;
 	}
-	return_VALUE(1);
+	return 1;
 }
 
-
 static
-int acpi_processor_device_add(
-	acpi_handle	handle,
-	struct acpi_device **device)
+int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device)
 {
-	acpi_handle		phandle;
-	struct acpi_device 	*pdev;
-	struct acpi_processor	*pr;
+	acpi_handle phandle;
+	struct acpi_device *pdev;
+	struct acpi_processor *pr;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_device_add");
 
 	if (acpi_get_parent(handle, &phandle)) {
-		return_VALUE(-ENODEV);
+		return -ENODEV;
 	}
 
 	if (acpi_bus_get_device(phandle, &pdev)) {
-		return_VALUE(-ENODEV);
+		return -ENODEV;
 	}
 
 	if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) {
-		return_VALUE(-ENODEV);
+		return -ENODEV;
 	}
 
 	acpi_bus_start(*device);
 
 	pr = acpi_driver_data(*device);
 	if (!pr)
-		return_VALUE(-ENODEV);
+		return -ENODEV;
 
-	if ((pr->id >=0) && (pr->id < NR_CPUS)) {
-		kobject_hotplug(&(*device)->kobj, KOBJ_ONLINE);
+	if ((pr->id >= 0) && (pr->id < NR_CPUS)) {
+		kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE);
 	}
-	return_VALUE(0);
+	return 0;
 }
 
-
 static void
-acpi_processor_hotplug_notify (
-	acpi_handle		handle,
-	u32			event,
-	void			*data)
+acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct acpi_processor	*pr;
-	struct acpi_device	*device = NULL;
+	struct acpi_processor *pr;
+	struct acpi_device *device = NULL;
 	int result;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_hotplug_notify");
 
 	switch (event) {
 	case ACPI_NOTIFY_BUS_CHECK:
 	case ACPI_NOTIFY_DEVICE_CHECK:
 		printk("Processor driver received %s event\n",
-			(event==ACPI_NOTIFY_BUS_CHECK)?
-			"ACPI_NOTIFY_BUS_CHECK":"ACPI_NOTIFY_DEVICE_CHECK");
+		       (event == ACPI_NOTIFY_BUS_CHECK) ?
+		       "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK");
 
 		if (!is_processor_present(handle))
 			break;
@@ -798,167 +837,151 @@ acpi_processor_hotplug_notify (
 		if (acpi_bus_get_device(handle, &device)) {
 			result = acpi_processor_device_add(handle, &device);
 			if (result)
-				ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-					"Unable to add the device\n"));
+				printk(KERN_ERR PREFIX
+					    "Unable to add the device\n");
 			break;
 		}
 
 		pr = acpi_driver_data(device);
 		if (!pr) {
-			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-				"Driver data is NULL\n"));
+			printk(KERN_ERR PREFIX "Driver data is NULL\n");
 			break;
 		}
 
 		if (pr->id >= 0 && (pr->id < NR_CPUS)) {
-			kobject_hotplug(&device->kobj, KOBJ_OFFLINE);
+			kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
 			break;
 		}
 
 		result = acpi_processor_start(device);
-		if ((!result) && ((pr->id >=0) && (pr->id < NR_CPUS))) {
-			kobject_hotplug(&device->kobj, KOBJ_ONLINE);
+		if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) {
+			kobject_uevent(&device->dev.kobj, KOBJ_ONLINE);
 		} else {
-			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-				"Device [%s] failed to start\n",
-				acpi_device_bid(device)));
+			printk(KERN_ERR PREFIX "Device [%s] failed to start\n",
+				    acpi_device_bid(device));
 		}
-	break;
+		break;
 	case ACPI_NOTIFY_EJECT_REQUEST:
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,"received ACPI_NOTIFY_EJECT_REQUEST\n"));
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+				  "received ACPI_NOTIFY_EJECT_REQUEST\n"));
 
 		if (acpi_bus_get_device(handle, &device)) {
-			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,"Device don't exist, dropping EJECT\n"));
+			printk(KERN_ERR PREFIX
+				    "Device don't exist, dropping EJECT\n");
 			break;
 		}
 		pr = acpi_driver_data(device);
 		if (!pr) {
-			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,"Driver data is NULL, dropping EJECT\n"));
-			return_VOID;
+			printk(KERN_ERR PREFIX
+				    "Driver data is NULL, dropping EJECT\n");
+			return;
 		}
 
 		if ((pr->id < NR_CPUS) && (cpu_present(pr->id)))
-			kobject_hotplug(&device->kobj, KOBJ_OFFLINE);
+			kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
 		break;
 	default:
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"Unsupported event [0x%x]\n", event));
+				  "Unsupported event [0x%x]\n", event));
 		break;
 	}
 
-	return_VOID;
+	return;
 }
 
 static acpi_status
 processor_walk_namespace_cb(acpi_handle handle,
-	u32 lvl,
-	void *context,
-	void **rv)
+			    u32 lvl, void *context, void **rv)
 {
-	acpi_status 			status;
+	acpi_status status;
 	int *action = context;
-	acpi_object_type	type = 0;
+	acpi_object_type type = 0;
 
 	status = acpi_get_type(handle, &type);
 	if (ACPI_FAILURE(status))
-		return(AE_OK);
+		return (AE_OK);
 
 	if (type != ACPI_TYPE_PROCESSOR)
-		return(AE_OK);
+		return (AE_OK);
 
-	switch(*action) {
+	switch (*action) {
 	case INSTALL_NOTIFY_HANDLER:
 		acpi_install_notify_handler(handle,
-			ACPI_SYSTEM_NOTIFY,
-			acpi_processor_hotplug_notify,
-			NULL);
+					    ACPI_SYSTEM_NOTIFY,
+					    acpi_processor_hotplug_notify,
+					    NULL);
 		break;
 	case UNINSTALL_NOTIFY_HANDLER:
 		acpi_remove_notify_handler(handle,
-			ACPI_SYSTEM_NOTIFY,
-			acpi_processor_hotplug_notify);
+					   ACPI_SYSTEM_NOTIFY,
+					   acpi_processor_hotplug_notify);
 		break;
 	default:
 		break;
 	}
 
-	return(AE_OK);
+	return (AE_OK);
 }
 
-
-static acpi_status
-acpi_processor_hotadd_init(
-	acpi_handle		handle,
-	int			*p_cpu)
+static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
 {
-	ACPI_FUNCTION_TRACE("acpi_processor_hotadd_init");
 
 	if (!is_processor_present(handle)) {
-		return_VALUE(AE_ERROR);
+		return AE_ERROR;
 	}
 
 	if (acpi_map_lsapic(handle, p_cpu))
-		return_VALUE(AE_ERROR);
+		return AE_ERROR;
 
 	if (arch_register_cpu(*p_cpu)) {
 		acpi_unmap_lsapic(*p_cpu);
-		return_VALUE(AE_ERROR);
+		return AE_ERROR;
 	}
 
-	return_VALUE(AE_OK);
+	return AE_OK;
 }
 
-
-static int
-acpi_processor_handle_eject(struct acpi_processor *pr)
+static int acpi_processor_handle_eject(struct acpi_processor *pr)
 {
 	if (cpu_online(pr->id)) {
-		return(-EINVAL);
+		return (-EINVAL);
 	}
 	arch_unregister_cpu(pr->id);
 	acpi_unmap_lsapic(pr->id);
-	return(0);
+	return (0);
 }
 #else
-static acpi_status
-acpi_processor_hotadd_init(
-	acpi_handle		handle,
-	int			*p_cpu)
+static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
 {
 	return AE_ERROR;
 }
-static int
-acpi_processor_handle_eject(struct acpi_processor *pr)
+static int acpi_processor_handle_eject(struct acpi_processor *pr)
 {
-	return(-EINVAL);
+	return (-EINVAL);
 }
 #endif
 
-
 static
 void acpi_processor_install_hotplug_notify(void)
 {
 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 	int action = INSTALL_NOTIFY_HANDLER;
 	acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
-				     ACPI_ROOT_OBJECT,
-				     ACPI_UINT32_MAX,
-				     processor_walk_namespace_cb,
-				     &action, NULL);
+			    ACPI_ROOT_OBJECT,
+			    ACPI_UINT32_MAX,
+			    processor_walk_namespace_cb, &action, NULL);
 #endif
 }
 
-
 static
 void acpi_processor_uninstall_hotplug_notify(void)
 {
 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 	int action = UNINSTALL_NOTIFY_HANDLER;
 	acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
-				     ACPI_ROOT_OBJECT,
-				     ACPI_UINT32_MAX,
-				     processor_walk_namespace_cb,
-				     &action, NULL);
+			    ACPI_ROOT_OBJECT,
+			    ACPI_UINT32_MAX,
+			    processor_walk_namespace_cb, &action, NULL);
 #endif
 }
 
@@ -968,25 +991,29 @@ void acpi_processor_uninstall_hotplug_notify(void)
  * ACPI, but needs symbols from this driver
  */
 
-static int __init
-acpi_processor_init (void)
+static int __init acpi_processor_init(void)
 {
-	int			result = 0;
+	int result = 0;
 
-	ACPI_FUNCTION_TRACE("acpi_processor_init");
 
 	memset(&processors, 0, sizeof(processors));
 	memset(&errata, 0, sizeof(errata));
 
+#ifdef CONFIG_SMP
+	if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
+				(struct acpi_table_header **)&madt)))
+		madt = NULL;
+#endif
+
 	acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir);
 	if (!acpi_processor_dir)
-		return_VALUE(0);
+		return -ENOMEM;
 	acpi_processor_dir->owner = THIS_MODULE;
 
 	result = acpi_bus_register_driver(&acpi_processor_driver);
 	if (result < 0) {
 		remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
-		return_VALUE(0);
+		return result;
 	}
 
 	acpi_processor_install_hotplug_notify();
@@ -995,14 +1022,11 @@ acpi_processor_init (void)
 
 	acpi_processor_ppc_init();
 
-	return_VALUE(0);
+	return 0;
 }
 
-
-static void __exit
-acpi_processor_exit (void)
+static void __exit acpi_processor_exit(void)
 {
-	ACPI_FUNCTION_TRACE("acpi_processor_exit");
 
 	acpi_processor_ppc_exit();
 
@@ -1014,10 +1038,9 @@ acpi_processor_exit (void)
 
 	remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
 
-	return_VOID;
+	return;
 }
 
-
 module_init(acpi_processor_init);
 module_exit(acpi_processor_exit);