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-rw-r--r--sys/dev/acpica/acpi.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index 08a967f..c671ef9 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -2451,6 +2451,46 @@ acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
return (AE_OK);
}
+ACPI_STATUS
+acpi_EvaluateOSC(ACPI_HANDLE handle, uint8_t *uuid, int revision, int count,
+ uint32_t *caps_in, uint32_t *caps_out, bool query)
+{
+ ACPI_OBJECT arg[4], *ret;
+ ACPI_OBJECT_LIST arglist;
+ ACPI_BUFFER buf;
+ ACPI_STATUS status;
+
+ arglist.Pointer = arg;
+ arglist.Count = 4;
+ arg[0].Type = ACPI_TYPE_BUFFER;
+ arg[0].Buffer.Length = ACPI_UUID_LENGTH;
+ arg[0].Buffer.Pointer = uuid;
+ arg[1].Type = ACPI_TYPE_INTEGER;
+ arg[1].Integer.Value = revision;
+ arg[2].Type = ACPI_TYPE_INTEGER;
+ arg[2].Integer.Value = count;
+ arg[3].Type = ACPI_TYPE_BUFFER;
+ arg[3].Buffer.Length = count * sizeof(*caps_in);
+ arg[3].Buffer.Pointer = (uint8_t *)caps_in;
+ caps_in[0] = query ? 1 : 0;
+ buf.Pointer = NULL;
+ buf.Length = ACPI_ALLOCATE_BUFFER;
+ status = AcpiEvaluateObjectTyped(handle, "_OSC", &arglist, &buf,
+ ACPI_TYPE_BUFFER);
+ if (ACPI_FAILURE(status))
+ return (status);
+ if (caps_out != NULL) {
+ ret = buf.Pointer;
+ if (ret->Buffer.Length != count * sizeof(*caps_out)) {
+ AcpiOsFree(buf.Pointer);
+ return (AE_BUFFER_OVERFLOW);
+ }
+ bcopy(ret->Buffer.Pointer, caps_out, ret->Buffer.Length);
+ }
+ AcpiOsFree(buf.Pointer);
+ return (status);
+}
+
/*
* Set interrupt model.
*/
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