Change in coreboot[master]: acpi: Hide Chrome and Coreboot specific devices

[Lucas Chen (Code Review)]

Lucas Chen has uploaded this change for review. ( https://review.coreboot.org/28333

Change subject: acpi: Hide Chrome and Coreboot specific devices
......................................................................

acpi: Hide Chrome and Coreboot specific devices

Some ACPI interfaces introduced by Chrome or Coreboot do not
need drivers outside ChromeOS, for example Chrome EC or
Coreboot table.

These interfaces should be set to hidden so non-ChromeOS systems,
for example Windows, won't have problem finding driver.

Interfaces changed:
- Coreboot (BOOT0000), only used by Chrome OS / Linux kernel.
- Chrome OS EC
- Chrome OS EC PD
- Chrome OS TBMC
- Chrome OS RAMoops

BUG=b:72200466
BRANCH=eve
TEST=Boot into legacy mode and checked ACPI devices on UI.

Change-Id: I9786cf9ee07b2c3f11509850604f2bfb3f3e710a
Signed-off-by: David Wu 
Reviewed-on: https://chromium-review.googlesource.com/1078211
Reviewed-by: Hung-Te Lin 
Commit-Queue: Hung-Te Lin 
Tested-by: Hung-Te Lin 
Trybot-Ready: Hung-Te Lin 
---
M src/arch/x86/acpi.c
M src/arch/x86/include/arch/acpigen.h
M src/ec/google/chromeec/acpi/cros_ec.asl
M src/ec/google/chromeec/acpi/pd.asl
M src/ec/google/chromeec/acpi/tbmc.asl
M src/vendorcode/google/chromeos/acpi/ramoops.asl
6 files changed, 20 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/28333/1

diff --git a/src/arch/x86/acpi.c b/src/arch/x86/acpi.c
index 78eeaa7..8e16f94 100644
--- a/src/arch/x86/acpi.c
+++ b/src/arch/x86/acpi.c
@@ -324,7 +324,7 @@
    acpigen_write_device("CTBL");
    acpigen_write_coreboot_hid(COREBOOT_ACPI_ID_CBTABLE);
    acpigen_write_name_integer("_UID", 0);
-	acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
+	acpigen_write_STA(ACPI_STATUS_DEVICE_HIDDEN_ON);
    acpigen_write_name("_CRS");
    acpigen_write_resourcetemplate_header();
    acpigen_write_mem32fixed(0, base, size);
diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h
index 775339a..a27bd6f 100644
--- a/src/arch/x86/include/arch/acpigen.h
+++ b/src/arch/x86/include/arch/acpigen.h
@@ -36,6 +36,9 @@
    				 ACPI_STATUS_DEVICE_ENABLED |\
    				 ACPI_STATUS_DEVICE_SHOW_IN_UI |\
    				 ACPI_STATUS_DEVICE_STATE_OK)
+#define ACPI_STATUS_DEVICE_HIDDEN_ON	(ACPI_STATUS_DEVICE_PRESENT |\
+					 ACPI_STATUS_DEVICE_ENABLED |\
+					 ACPI_STATUS_DEVICE_STATE_OK)

/* ACPI Op/Prefix Codes */
 enum {
diff --git a/src/ec/google/chromeec/acpi/cros_ec.asl b/src/ec/google/chromeec/acpi/cros_ec.asl
index 1d7fb52..d0a5b68 100644
--- a/src/ec/google/chromeec/acpi/cros_ec.asl
+++ b/src/ec/google/chromeec/acpi/cros_ec.asl
@@ -39,4 +39,8 @@
    	Name (_DDN, "EC Base Switch Device")
    }
 #endif
+	Method(_STA, 0)
+	{
+		Return (0xB)
+	}
 }
diff --git a/src/ec/google/chromeec/acpi/pd.asl b/src/ec/google/chromeec/acpi/pd.asl
index a5a58f5..7b799e8 100644
--- a/src/ec/google/chromeec/acpi/pd.asl
+++ b/src/ec/google/chromeec/acpi/pd.asl
@@ -18,4 +18,8 @@
    Name (_HID, "GOOG0003")
    Name (_UID, 1)
    Name (_DDN, "EC PD Device")
+	Method(_STA, 0)
+	{
+		Return (0xB)
+	}
 }
diff --git a/src/ec/google/chromeec/acpi/tbmc.asl b/src/ec/google/chromeec/acpi/tbmc.asl
index 25a27ef1b..86a6de8 100644
--- a/src/ec/google/chromeec/acpi/tbmc.asl
+++ b/src/ec/google/chromeec/acpi/tbmc.asl
@@ -26,4 +26,8 @@
    		Return (0x0)
    	}
    }
+	Method(_STA, 0)
+	{
+		Return (0xB)
+	}
 }
diff --git a/src/vendorcode/google/chromeos/acpi/ramoops.asl b/src/vendorcode/google/chromeos/acpi/ramoops.asl
index 5a8ed86..810ff91 100644
--- a/src/vendorcode/google/chromeos/acpi/ramoops.asl
+++ b/src/vendorcode/google/chromeos/acpi/ramoops.asl
@@ -35,5 +35,9 @@
    		Store (\RMOL, RLEN)
    		Return (^RBUF)
    	}
+		Method(_STA, 0)
+		{
+			Return (0xB)
+		}
    }
 }