ACPICA: Disassembler: Add Switch/Case disassembly support

ACPICA commit 0f6cc80e8af519a3c31184367b0a9be7a399cf53

iasl compiles Switch/Case statements into a single iteration While
loop with If/Else statements. This patch adds support to recognize
this generated compiler output and disassemble it back to the
original Switch statement.

Linux kernel is not affected by this patch.

Link: https://github.com/acpica/acpica/commit/0f6cc80e
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 792660054992..7b97801d907d 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -770,7 +770,7 @@ union acpi_parse_value {
         char                            *operator_symbol;/* Used for C-style operator name strings */\
         char                            aml_op_name[16])        /* Op name (debug only) */
 
-/* Flags for disasm_flags field above */
+/* Internal opcodes for disasm_opcode field above */
 
 #define ACPI_DASM_BUFFER                0x00    /* Buffer is a simple data buffer */
 #define ACPI_DASM_RESOURCE              0x01    /* Buffer is a Resource Descriptor */
@@ -783,7 +783,10 @@ union acpi_parse_value {
 #define ACPI_DASM_LNOT_PREFIX           0x08    /* Start of a Lnot_equal (etc.) pair of opcodes */
 #define ACPI_DASM_LNOT_SUFFIX           0x09    /* End  of a Lnot_equal (etc.) pair of opcodes */
 #define ACPI_DASM_HID_STRING            0x0A    /* String is a _HID or _CID */
-#define ACPI_DASM_IGNORE                0x0B    /* Not used at this time */
+#define ACPI_DASM_IGNORE_SINGLE         0x0B    /* Ignore the opcode but not it's children */
+#define ACPI_DASM_SWITCH_PREDICATE      0x0C    /* Object is a predicate for a Switch or Case block */
+#define ACPI_DASM_CASE                  0x0D    /* If/Else is a Case in a Switch/Case block */
+#define ACPI_DASM_DEFAULT               0x0E    /* Else is a Default in a Switch/Case block */
 
 /*
  * Generic operation (for example:  If, While, Store)