Module Name: src
Committed By: jmcneill
Date: Sat Jan 15 14:40:22 UTC 2022
Modified Files:
src/sys/dev/acpi: acpi_util.c
Log Message:
acpi: Add helper for querying DSM function 0.
To generate a diff of this commit:
cvs rdiff -u -r1.30 -r1.31 src/sys/dev/acpi/acpi_util.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/acpi/acpi_util.c
diff -u src/sys/dev/acpi/acpi_util.c:1.30 src/sys/dev/acpi/acpi_util.c:1.31
--- src/sys/dev/acpi/acpi_util.c:1.30 Sun Jan 9 14:28:23 2022
+++ src/sys/dev/acpi/acpi_util.c Sat Jan 15 14:40:22 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi_util.c,v 1.30 2022/01/09 14:28:23 jmcneill Exp $ */
+/* $NetBSD: acpi_util.c,v 1.31 2022/01/15 14:40:22 jmcneill Exp $ */
/*-
* Copyright (c) 2003, 2007, 2021 The NetBSD Foundation, Inc.
@@ -65,7 +65,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_util.c,v 1.30 2022/01/09 14:28:23 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_util.c,v 1.31 2022/01/15 14:40:22 jmcneill Exp $");
#include <sys/param.h>
#include <sys/kmem.h>
@@ -1117,6 +1117,38 @@ acpi_dsm(ACPI_HANDLE handle, uint8_t *uu
}
ACPI_STATUS
+acpi_dsm_query(ACPI_HANDLE handle, uint8_t *uuid, ACPI_INTEGER rev,
+ ACPI_INTEGER *ret)
+{
+ ACPI_OBJECT *obj;
+ ACPI_STATUS status;
+ uint8_t *data;
+ u_int n;
+
+ status = acpi_dsm(handle, uuid, rev, 0, NULL, &obj);
+ if (ACPI_FAILURE(status)) {
+ return status;
+ }
+
+ if (obj->Type == ACPI_TYPE_INTEGER) {
+ *ret = obj->Integer.Value;
+ } else if (obj->Type == ACPI_TYPE_BUFFER &&
+ obj->Buffer.Length <= 8) {
+ *ret = 0;
+ data = (uint8_t *)obj->Buffer.Pointer;
+ for (n = 0; n < obj->Buffer.Length; n++) {
+ *ret |= (uint64_t)data[n] << (n * 8);
+ }
+ } else {
+ status = AE_TYPE;
+ }
+
+ ACPI_FREE(obj);
+
+ return status;
+}
+
+ACPI_STATUS
acpi_claim_childdevs(device_t dev, struct acpi_devnode *devnode)
{
struct acpi_devnode *ad;
