From: Alexey Starikovskiy <alexey.y.starikovskiy@xxxxxxxxx>
Allow processor to be declered with the Device(), such as:
Device(CPU1234) {
Name(_HID, "ACPI007")
Name(_UID, 1234)
}
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
drivers/acpi/processor_core.c | 53 ++++++++++++++++++++++++----------------
include/acpi/acpi_drivers.h | 2 +-
2 files changed, 33 insertions(+), 22 deletions(-)
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 6893c0b..eacf9a2 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -377,7 +377,7 @@ static int acpi_processor_remove_fs(struct acpi_device *device)
/* Use the acpiid in MADT to map cpus in case of SMP */
#ifndef CONFIG_SMP
-#define convert_acpiid_to_cpu(acpi_id) (-1)
+static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;}
#else
static struct acpi_table_madt *madt;
@@ -483,7 +483,7 @@ exit:
return apic_id;
}
-static int get_apic_id(acpi_handle handle, u32 acpi_id)
+static int get_cpu_id(acpi_handle handle, u32 acpi_id)
{
int i;
int apic_id = -1;
@@ -506,7 +506,7 @@ static int get_apic_id(acpi_handle handle, u32 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 };
@@ -535,24 +535,35 @@ static int acpi_processor_get_info(struct acpi_processor *pr)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"No bus mastering arbitration control\n"));
- /*
- * 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;
- }
-
- /*
- * 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;
+ /* 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;
+ }
- cpu_index = get_apic_id(pr->handle, pr->acpi_id);
+ /*
+ * 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) &&
@@ -621,7 +632,7 @@ static int __cpuinit acpi_processor_start(struct acpi_device *device)
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 0;
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index 6a5bdce..baaa734 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -37,7 +37,7 @@
/* _HID definitions */
#define ACPI_POWER_HID "ACPI_PWR"
-#define ACPI_PROCESSOR_HID "ACPI_CPU"
+#define ACPI_PROCESSOR_HID "ACPI0007"
#define ACPI_SYSTEM_HID "ACPI_SYS"
#define ACPI_THERMAL_HID "ACPI_THM"
#define ACPI_BUTTON_HID_POWERF "ACPI_FPB"
--
1.5.0.rc3.39.gec804
-
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