[PATCH v2 04/10] acpi: dbg2: add SBBR compliance tests

[Sakar Arora]

From: Rajat Goyal <Rajat.Goyal at arm.com>

Server Base Boot Requirements (SBBR) specification is intended for SBSA-
compliant 64-bit ARMv8 servers.
It defines the base firmware requirements for out-of-box support of any
ARM SBSA-compatible Operating System or hypervisor.
The requirements in this specification are expected to be minimal yet
complete for booting a multi-core ARMv8 server platform, while leaving
plenty of room for OEM or ODM innovations and design details.
For more information, download the SBBR specification here:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044b/index.html

This change introduces test cases as per SBBR specification to dbg2
table.

Signed-off-by: Supreeth Venkatesh <supreeth.venkatesh at arm.com>
Signed-off-by: Rajat Goyal <Rajat.Goyal at arm.com>
---
 src/acpi/dbg2/dbg2.c | 47 +++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 45 insertions(+), 2 deletions(-)

diff --git a/src/acpi/dbg2/dbg2.c b/src/acpi/dbg2/dbg2.c
index e6f6f09..e1f7ac4 100644
--- a/src/acpi/dbg2/dbg2.c
+++ b/src/acpi/dbg2/dbg2.c
@@ -30,6 +30,9 @@
 
 #include "fwts_acpi_object_eval.h"
 
+#define SBBR_DBG2_PORT_SERIAL   0x8000
+#define SBBR_DBG2_ARM_SBSA_UART 0x000E
+
 static fwts_acpi_table_info *table;
 
 static int dbg2_init(fwts_framework *fw)
@@ -39,10 +42,49 @@ static int dbg2_init(fwts_framework *fw)
 		return FWTS_ERROR;
 	}
 	if (table == NULL || (table && table->length == 0)) {
-		fwts_log_error(fw, "ACPI DBG2 table does not exist, skipping test");
+		if (fw->flags & FWTS_FLAG_TEST_SBBR) {
+			fwts_log_error(fw,
+				"ACPI DBG2 table does not exist");
+			return FWTS_ERROR;
+		} else {
+			fwts_log_error(fw,
+				"ACPI DBG2 table does not exist, skipping test");
+			return FWTS_SKIP;
+		}
+	}
+
+	return FWTS_OK;
+}
+
+static int dbg2_test2(fwts_framework *fw)
+{
+	uint32_t i;
+
+	if (!(fw->flags & FWTS_FLAG_TEST_SBBR))
 		return FWTS_SKIP;
+
+	fwts_acpi_table_dbg2 *dbg2 = (fwts_acpi_table_dbg2 *)table->data;
+	fwts_acpi_table_dbg2_info *info;
+
+	info = (fwts_acpi_table_dbg2_info *)(table->data + dbg2->info_offset);
+
+	for (i = 0; i < dbg2->info_count; i++) {
+		if((info->port_type == SBBR_DBG2_PORT_SERIAL) &&
+			(info->port_subtype == SBBR_DBG2_ARM_SBSA_UART))
+		{
+			fwts_passed(fw,
+				"DBG2 provides a standard serial debug "
+				"port and describes ARM SBSA Generic UART");
+			return FWTS_OK;
+		}
+
+		/* ..and onto the next info structure .. */
+		info = (fwts_acpi_table_dbg2_info *)((uint8_t *)info +
+			info->length);
 	}
 
+	fwts_failed(fw, LOG_LEVEL_CRITICAL, "dbg2_sbsa_uart:",
+			"DBG2 provides a non standard debug port");
 	return FWTS_OK;
 }
 
@@ -343,6 +385,7 @@ done:
 
 static fwts_framework_minor_test dbg2_tests[] = {
 	{ dbg2_test1, "DBG2 (Debug Port Table 2) test." },
+	{ dbg2_test2, "DBG2 ARM SBSA Generic UART test," },
 	{ NULL, NULL }
 };
 
@@ -352,6 +395,6 @@ static fwts_framework_ops dbg2_ops = {
 	.minor_tests = dbg2_tests
 };
 
-FWTS_REGISTER("dbg2", &dbg2_ops, FWTS_TEST_ANYTIME, FWTS_FLAG_BATCH | FWTS_FLAG_TEST_ACPI)
+FWTS_REGISTER("dbg2", &dbg2_ops, FWTS_TEST_ANYTIME, FWTS_FLAG_BATCH | FWTS_FLAG_TEST_ACPI | FWTS_FLAG_TEST_SBBR)
 
 #endif
-- 
2.7.4