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authorIgor Mammedov <imammedo@redhat.com>2015-12-10 00:41:01 +0100
committerMichael S. Tsirkin <mst@redhat.com>2015-12-22 18:39:20 +0200
commit439e2a6e10ed7f5da819bf7dcaa54b8cfdbeab0d (patch)
tree8dc2c24082a34d4e63f705c79321339f4bff8c80 /hw/acpi
parent7e192a383b941d1f422117dd0915bbeff5fee5bd (diff)
acpi: aml: add helper for Opcode Arg2 Arg2 [Dst] AML pattern
Currently AML API doesn't compose terms in form of following pattern: Opcode Arg2 Arg2 [Dst] but ASL used in piix4/q35 DSDT ACPI tables uses that form, so for clean conversion of it, AML API should be able to handle an optional 'Dst' argumet used there. Since above pattern is used by arithmetic/bit ops, introduce helper that they could reuse. It reduces code duplication in existing 5 aml_foo() functions and also will prevent more duplication when exiting functions are extended to support optional 'Dst' argument. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Shannon Zhao <shannon.zhao@linaro.org>
Diffstat (limited to 'hw/acpi')
-rw-r--r--hw/acpi/aml-build.c61
1 files changed, 32 insertions, 29 deletions
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 95f9af9f94..c661d58718 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -436,44 +436,55 @@ Aml *aml_store(Aml *val, Aml *target)
return var;
}
-/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefAnd */
-Aml *aml_and(Aml *arg1, Aml *arg2)
+/**
+ * build_opcode_2arg_dst:
+ * @op: 1-byte opcode
+ * @arg1: 1st operand
+ * @arg2: 2nd operand
+ * @dst: optional target to store to, set to NULL if it's not required
+ *
+ * An internal helper to compose AML terms that have
+ * "Op Operand Operand Target"
+ * pattern.
+ *
+ * Returns: The newly allocated and composed according to patter Aml object.
+ */
+static Aml *
+build_opcode_2arg_dst(uint8_t op, Aml *arg1, Aml *arg2, Aml *dst)
{
- Aml *var = aml_opcode(0x7B /* AndOp */);
+ Aml *var = aml_opcode(op);
aml_append(var, arg1);
aml_append(var, arg2);
- build_append_byte(var->buf, 0x00 /* NullNameOp */);
+ if (dst) {
+ aml_append(var, dst);
+ } else {
+ build_append_byte(var->buf, 0x00 /* NullNameOp */);
+ }
return var;
}
+/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefAnd */
+Aml *aml_and(Aml *arg1, Aml *arg2)
+{
+ return build_opcode_2arg_dst(0x7B /* AndOp */, arg1, arg2, NULL);
+}
+
/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefOr */
Aml *aml_or(Aml *arg1, Aml *arg2)
{
- Aml *var = aml_opcode(0x7D /* OrOp */);
- aml_append(var, arg1);
- aml_append(var, arg2);
- build_append_byte(var->buf, 0x00 /* NullNameOp */);
- return var;
+ return build_opcode_2arg_dst(0x7D /* OrOp */, arg1, arg2, NULL);
}
/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefShiftLeft */
Aml *aml_shiftleft(Aml *arg1, Aml *count)
{
- Aml *var = aml_opcode(0x79 /* ShiftLeftOp */);
- aml_append(var, arg1);
- aml_append(var, count);
- build_append_byte(var->buf, 0x00); /* NullNameOp */
- return var;
+ return build_opcode_2arg_dst(0x79 /* ShiftLeftOp */, arg1, count, NULL);
}
/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefShiftRight */
Aml *aml_shiftright(Aml *arg1, Aml *count)
{
- Aml *var = aml_opcode(0x7A /* ShiftRightOp */);
- aml_append(var, arg1);
- aml_append(var, count);
- build_append_byte(var->buf, 0x00); /* NullNameOp */
- return var;
+ return build_opcode_2arg_dst(0x7A /* ShiftRightOp */, arg1, count, NULL);
}
/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefLLess */
@@ -488,11 +499,7 @@ Aml *aml_lless(Aml *arg1, Aml *arg2)
/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefAdd */
Aml *aml_add(Aml *arg1, Aml *arg2)
{
- Aml *var = aml_opcode(0x72 /* AddOp */);
- aml_append(var, arg1);
- aml_append(var, arg2);
- build_append_byte(var->buf, 0x00 /* NullNameOp */);
- return var;
+ return build_opcode_2arg_dst(0x72 /* AddOp */, arg1, arg2, NULL);
}
/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefIncrement */
@@ -506,11 +513,7 @@ Aml *aml_increment(Aml *arg)
/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefIndex */
Aml *aml_index(Aml *arg1, Aml *idx)
{
- Aml *var = aml_opcode(0x88 /* IndexOp */);
- aml_append(var, arg1);
- aml_append(var, idx);
- build_append_byte(var->buf, 0x00 /* NullNameOp */);
- return var;
+ return build_opcode_2arg_dst(0x88 /* IndexOp */, arg1, idx, NULL);
}
/* ACPI 1.0b: 16.2.5.3 Type 1 Opcodes Encoding: DefNotify */