Will need to reuse searching MADT for ioapic, but should add
related function like acpi_get_ioapic_id to processor_core.c
to pollute the file.
Move related cpu apic id search to separated file.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
drivers/acpi/Makefile | 1 +
drivers/acpi/apic_id.c | 201 ++++++++++++++++++++++++++++++++++++++++++
drivers/acpi/processor_core.c | 193 ----------------------------------------
include/acpi/processor.h | 3 -
include/linux/acpi.h | 4 +
5 files changed, 206 insertions(+), 196 deletions(-)
create mode 100644 drivers/acpi/apic_id.c
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 0331f91..d922feb 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -34,6 +34,7 @@ acpi-$(CONFIG_ACPI_SLEEP) += proc.o
acpi-y += bus.o glue.o
acpi-y += scan.o
acpi-y += resource.o
+acpi-y += apic_id.o
acpi-y += acpi_processor.o
acpi-y += processor_core.o
acpi-y += ec.o
diff --git a/drivers/acpi/apic_id.c b/drivers/acpi/apic_id.c
new file mode 100644
index 0000000..bf4e6de
--- /dev/null
+++ b/drivers/acpi/apic_id.c
@@ -0,0 +1,201 @@
+/*
+ * acpi_get_cpuid
+ */
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+
+#include "internal.h"
+
+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))
+ return 0;
+
+ if (lapic->processor_id != acpi_id)
+ return 0;
+
+ *apic_id = lapic->id;
+ return 1;
+}
+
+static int map_x2apic_id(struct acpi_subtable_header *entry,
+ int device_declaration, u32 acpi_id, int *apic_id)
+{
+ struct acpi_madt_local_x2apic *apic =
+ (struct acpi_madt_local_x2apic *)entry;
+
+ if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
+ return 0;
+
+ if (device_declaration && (apic->uid == acpi_id)) {
+ *apic_id = apic->local_apic_id;
+ return 1;
+ }
+
+ return 0;
+}
+
+static int map_lsapic_id(struct acpi_subtable_header *entry,
+ int device_declaration, u32 acpi_id, int *apic_id)
+{
+ struct acpi_madt_local_sapic *lsapic =
+ (struct acpi_madt_local_sapic *)entry;
+
+ if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
+ return 0;
+
+ if (device_declaration) {
+ if ((entry->length < 16) || (lsapic->uid != acpi_id))
+ return 0;
+ } else if (lsapic->processor_id != acpi_id)
+ return 0;
+
+ *apic_id = (lsapic->id << 8) | lsapic->eid;
+ return 1;
+}
+
+static int map_madt_entry(int type, u32 acpi_id)
+{
+ unsigned long madt_end, entry;
+ static struct acpi_table_madt *madt;
+ static int read_madt;
+ int apic_id = -1;
+
+ if (!read_madt) {
+ if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
+ (struct acpi_table_header **)&madt)))
+ madt = NULL;
+ read_madt++;
+ }
+
+ 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_X2APIC) {
+ if (map_x2apic_id(header, type, acpi_id, &apic_id))
+ break;
+ } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
+ if (map_lsapic_id(header, type, acpi_id, &apic_id))
+ break;
+ }
+ entry += header->length;
+ }
+ return apic_id;
+}
+
+static int map_mat_entry(acpi_handle handle, int type, 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_X2APIC) {
+ map_x2apic_id(header, type, acpi_id, &apic_id);
+ } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
+ map_lsapic_id(header, type, acpi_id, &apic_id);
+ }
+
+exit:
+ kfree(buffer.pointer);
+ return apic_id;
+}
+
+int acpi_get_apicid(acpi_handle handle, int type, u32 acpi_id)
+{
+ int apic_id;
+
+ apic_id = map_mat_entry(handle, type, acpi_id);
+ if (apic_id == -1)
+ apic_id = map_madt_entry(type, acpi_id);
+
+ return apic_id;
+}
+
+int acpi_map_cpuid(int apic_id, u32 acpi_id)
+{
+#ifdef CONFIG_SMP
+ int i;
+#endif
+
+ if (apic_id == -1) {
+ /*
+ * On UP processor, there is no _MAT or MADT table.
+ * So above apic_id is always set to -1.
+ *
+ * BIOS may define multiple CPU handles even for UP processor.
+ * For example,
+ *
+ * Scope (_PR)
+ * {
+ * Processor (CPU0, 0x00, 0x00000410, 0x06) {}
+ * Processor (CPU1, 0x01, 0x00000410, 0x06) {}
+ * Processor (CPU2, 0x02, 0x00000410, 0x06) {}
+ * Processor (CPU3, 0x03, 0x00000410, 0x06) {}
+ * }
+ *
+ * Ignores apic_id and always returns 0 for the processor
+ * handle with acpi id 0 if nr_cpu_ids is 1.
+ * This should be the case if SMP tables are not found.
+ * Return -1 for other CPU's handle.
+ */
+ if (nr_cpu_ids <= 1 && acpi_id == 0)
+ return acpi_id;
+ else
+ return apic_id;
+ }
+
+#ifdef CONFIG_SMP
+ for_each_possible_cpu(i) {
+ if (cpu_physical_id(i) == apic_id)
+ return i;
+ }
+#else
+ /* In UP kernel, only processor 0 is valid */
+ if (apic_id == 0)
+ return apic_id;
+#endif
+ return -1;
+}
+
+int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
+{
+ int apic_id;
+
+ apic_id = acpi_get_apicid(handle, type, acpi_id);
+
+ return acpi_map_cpuid(apic_id, acpi_id);
+}
+EXPORT_SYMBOL_GPL(acpi_get_cpuid);
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 559e762..ad9a850 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -38,199 +38,6 @@ static struct dmi_system_id processor_idle_dmi_table[] __initdata = {
{},
};
-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))
- return 0;
-
- if (lapic->processor_id != acpi_id)
- return 0;
-
- *apic_id = lapic->id;
- return 1;
-}
-
-static int map_x2apic_id(struct acpi_subtable_header *entry,
- int device_declaration, u32 acpi_id, int *apic_id)
-{
- struct acpi_madt_local_x2apic *apic =
- (struct acpi_madt_local_x2apic *)entry;
-
- if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
- return 0;
-
- if (device_declaration && (apic->uid == acpi_id)) {
- *apic_id = apic->local_apic_id;
- return 1;
- }
-
- return 0;
-}
-
-static int map_lsapic_id(struct acpi_subtable_header *entry,
- int device_declaration, u32 acpi_id, int *apic_id)
-{
- struct acpi_madt_local_sapic *lsapic =
- (struct acpi_madt_local_sapic *)entry;
-
- if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
- return 0;
-
- if (device_declaration) {
- if ((entry->length < 16) || (lsapic->uid != acpi_id))
- return 0;
- } else if (lsapic->processor_id != acpi_id)
- return 0;
-
- *apic_id = (lsapic->id << 8) | lsapic->eid;
- return 1;
-}
-
-static int map_madt_entry(int type, u32 acpi_id)
-{
- unsigned long madt_end, entry;
- static struct acpi_table_madt *madt;
- static int read_madt;
- int apic_id = -1;
-
- if (!read_madt) {
- if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
- (struct acpi_table_header **)&madt)))
- madt = NULL;
- read_madt++;
- }
-
- 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_X2APIC) {
- if (map_x2apic_id(header, type, acpi_id, &apic_id))
- break;
- } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
- if (map_lsapic_id(header, type, acpi_id, &apic_id))
- break;
- }
- entry += header->length;
- }
- return apic_id;
-}
-
-static int map_mat_entry(acpi_handle handle, int type, 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_X2APIC) {
- map_x2apic_id(header, type, acpi_id, &apic_id);
- } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
- map_lsapic_id(header, type, acpi_id, &apic_id);
- }
-
-exit:
- kfree(buffer.pointer);
- return apic_id;
-}
-
-int acpi_get_apicid(acpi_handle handle, int type, u32 acpi_id)
-{
- int apic_id;
-
- apic_id = map_mat_entry(handle, type, acpi_id);
- if (apic_id == -1)
- apic_id = map_madt_entry(type, acpi_id);
-
- return apic_id;
-}
-
-int acpi_map_cpuid(int apic_id, u32 acpi_id)
-{
-#ifdef CONFIG_SMP
- int i;
-#endif
-
- if (apic_id == -1) {
- /*
- * On UP processor, there is no _MAT or MADT table.
- * So above apic_id is always set to -1.
- *
- * BIOS may define multiple CPU handles even for UP processor.
- * For example,
- *
- * Scope (_PR)
- * {
- * Processor (CPU0, 0x00, 0x00000410, 0x06) {}
- * Processor (CPU1, 0x01, 0x00000410, 0x06) {}
- * Processor (CPU2, 0x02, 0x00000410, 0x06) {}
- * Processor (CPU3, 0x03, 0x00000410, 0x06) {}
- * }
- *
- * Ignores apic_id and always returns 0 for the processor
- * handle with acpi id 0 if nr_cpu_ids is 1.
- * This should be the case if SMP tables are not found.
- * Return -1 for other CPU's handle.
- */
- if (nr_cpu_ids <= 1 && acpi_id == 0)
- return acpi_id;
- else
- return apic_id;
- }
-
-#ifdef CONFIG_SMP
- for_each_possible_cpu(i) {
- if (cpu_physical_id(i) == apic_id)
- return i;
- }
-#else
- /* In UP kernel, only processor 0 is valid */
- if (apic_id == 0)
- return apic_id;
-#endif
- return -1;
-}
-
-int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
-{
- int apic_id;
-
- apic_id = acpi_get_apicid(handle, type, acpi_id);
-
- return acpi_map_cpuid(apic_id, acpi_id);
-}
-EXPORT_SYMBOL_GPL(acpi_get_cpuid);
-
static bool __init processor_physically_present(acpi_handle handle)
{
int cpuid, type;
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 6eb1d3c..337e731 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -314,9 +314,6 @@ static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
/* in processor_core.c */
void acpi_processor_set_pdc(acpi_handle handle);
-int acpi_get_apicid(acpi_handle, int type, u32 acpi_id);
-int acpi_map_cpuid(int apic_id, u32 acpi_id);
-int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
/* in processor_throttling.c */
int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index d9099b1..2f73b81 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -134,6 +134,10 @@ int acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu);
int acpi_unmap_lsapic(int cpu);
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
+int acpi_get_apicid(acpi_handle, int type, u32 acpi_id);
+int acpi_map_cpuid(int apic_id, u32 acpi_id);
+int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
+
int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base);
int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base);
void acpi_irq_stats_init(void);
--
1.8.4
--
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