From 55d7ff9ea2cd95aa5bae0c7e65409712efacbb7d Mon Sep 17 00:00:00 2001
From: Nate Lawson <njl@FreeBSD.org>
Date: Wed, 10 Sep 2003 23:52:12 +0000
Subject: [PATCH] Add dumping of the ECDT table.

Courtesy of:	USENIX hall track
---
 usr.sbin/acpi/acpidump/acpi.c     | 20 ++++++++++++++++++++
 usr.sbin/acpi/acpidump/acpidump.h |  9 +++++++++
 2 files changed, 29 insertions(+)

diff --git a/usr.sbin/acpi/acpidump/acpi.c b/usr.sbin/acpi/acpidump/acpi.c
index 92be215f2c8f..830e93c2f56f 100644
--- a/usr.sbin/acpi/acpidump/acpi.c
+++ b/usr.sbin/acpi/acpidump/acpi.c
@@ -337,6 +337,24 @@ acpi_handle_hpet(struct ACPIsdt *sdp)
 	printf(END_COMMENT);
 }
 
+static void
+acpi_handle_ecdt(struct ACPIsdt *sdp)
+{
+	struct ECDTbody *ecdt;
+
+	printf(BEGIN_COMMENT);
+	acpi_print_sdt(sdp);
+	ecdt = (struct ECDTbody *) sdp->body;
+	printf("\tEC_CONTROL=");
+	acpi_print_gas(&ecdt->ec_control);
+	printf("\n\tEC_DATA=");
+	acpi_print_gas(&ecdt->ec_data);
+	printf("\n\tUID=%#x, ", ecdt->uid);
+	printf("GPE_BIT=%#x\n", ecdt->gpe_bit);
+	printf("\tEC_ID=%s\n", ecdt->ec_id);
+	printf(END_COMMENT);
+}
+
 static void
 acpi_print_sdt(struct ACPIsdt *sdp)
 {
@@ -626,6 +644,8 @@ acpi_handle_rsdt(struct ACPIsdt *rsdp)
 			acpi_handle_apic(sdp);
 		else if (!memcmp(sdp->signature, "HPET", 4))
 			acpi_handle_hpet(sdp);
+		else if (!memcmp(sdp->signature, "ECDT", 4))
+			acpi_handle_ecdt(sdp);
 		else {
 			printf(BEGIN_COMMENT);
 			acpi_print_sdt(sdp);
diff --git a/usr.sbin/acpi/acpidump/acpidump.h b/usr.sbin/acpi/acpidump/acpidump.h
index 783fc6dd2cca..0d13adc53823 100644
--- a/usr.sbin/acpi/acpidump/acpidump.h
+++ b/usr.sbin/acpi/acpidump/acpidump.h
@@ -284,6 +284,15 @@ struct HPETbody {
 	u_int16_t	clock_tick __packed;
 } __packed;
 
+/* Embedded Controller Description Table */
+struct ECDTbody {
+	struct ACPIgas	ec_control;	/* Control register */
+	struct ACPIgas	ec_data;	/* Data register */
+	uint32_t	uid;		/* Same value as _UID in namespace */
+	uint8_t		gpe_bit;	/* GPE bit for the EC */
+	u_char		ec_id[1];	/* Variable length name string */
+} __packed;
+
 /* Find and map the RSD PTR structure and return it for parsing */
 struct ACPIsdt  *sdt_load_devmem(void);