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-rw-r--r--drivers/acpi/acpica/utexcep.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utexcep.c b/drivers/acpi/acpica/utexcep.c
new file mode 100644
index 0000000000..60fbdcde15
--- /dev/null
+++ b/drivers/acpi/acpica/utexcep.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/*******************************************************************************
+ *
+ * Module Name: utexcep - Exception code support
+ *
+ ******************************************************************************/
+
+#define EXPORT_ACPI_INTERFACES
+
+#define ACPI_DEFINE_EXCEPTION_TABLE
+#include <acpi/acpi.h>
+#include "accommon.h"
+
+#define _COMPONENT ACPI_UTILITIES
+ACPI_MODULE_NAME("utexcep")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_format_exception
+ *
+ * PARAMETERS: status - The acpi_status code to be formatted
+ *
+ * RETURN: A string containing the exception text. A valid pointer is
+ * always returned.
+ *
+ * DESCRIPTION: This function translates an ACPI exception into an ASCII
+ * string. Returns "unknown status" string for invalid codes.
+ *
+ ******************************************************************************/
+const char *acpi_format_exception(acpi_status status)
+{
+ const struct acpi_exception_info *exception;
+
+ ACPI_FUNCTION_ENTRY();
+
+ exception = acpi_ut_validate_exception(status);
+ if (!exception) {
+
+ /* Exception code was not recognized */
+
+ ACPI_ERROR((AE_INFO,
+ "Unknown exception code: 0x%8.8X", status));
+
+ return ("UNKNOWN_STATUS_CODE");
+ }
+
+ return (exception->name);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_format_exception)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_validate_exception
+ *
+ * PARAMETERS: status - The acpi_status code to be formatted
+ *
+ * RETURN: A string containing the exception text. NULL if exception is
+ * not valid.
+ *
+ * DESCRIPTION: This function validates and translates an ACPI exception into
+ * an ASCII string.
+ *
+ ******************************************************************************/
+const struct acpi_exception_info *acpi_ut_validate_exception(acpi_status status)
+{
+ u32 sub_status;
+ const struct acpi_exception_info *exception = NULL;
+
+ ACPI_FUNCTION_ENTRY();
+
+ /*
+ * Status is composed of two parts, a "type" and an actual code
+ */
+ sub_status = (status & ~AE_CODE_MASK);
+
+ switch (status & AE_CODE_MASK) {
+ case AE_CODE_ENVIRONMENTAL:
+
+ if (sub_status <= AE_CODE_ENV_MAX) {
+ exception = &acpi_gbl_exception_names_env[sub_status];
+ }
+ break;
+
+ case AE_CODE_PROGRAMMER:
+
+ if (sub_status <= AE_CODE_PGM_MAX) {
+ exception = &acpi_gbl_exception_names_pgm[sub_status];
+ }
+ break;
+
+ case AE_CODE_ACPI_TABLES:
+
+ if (sub_status <= AE_CODE_TBL_MAX) {
+ exception = &acpi_gbl_exception_names_tbl[sub_status];
+ }
+ break;
+
+ case AE_CODE_AML:
+
+ if (sub_status <= AE_CODE_AML_MAX) {
+ exception = &acpi_gbl_exception_names_aml[sub_status];
+ }
+ break;
+
+ case AE_CODE_CONTROL:
+
+ if (sub_status <= AE_CODE_CTRL_MAX) {
+ exception = &acpi_gbl_exception_names_ctrl[sub_status];
+ }
+ break;
+
+ default:
+
+ break;
+ }
+
+ if (!exception || !exception->name) {
+ return (NULL);
+ }
+
+ return (exception);
+}