[Qemu-devel] [PATCH v3 27/52] acpi: add aml_io() helper

[Igor Mammedov]

Signed-off-by: Igor Mammedov <address@hidden>
---
 hw/acpi/aml-build.c         | 16 ++++++++++++++++
 include/hw/acpi/aml-build.h |  7 +++++++
 2 files changed, 23 insertions(+)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 452db25..a5d5b83 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -518,6 +518,22 @@ Aml *aml_call4(const char *method, Aml *arg1, Aml *arg2, 
Aml *arg3, Aml *arg4)
     return var;
 }
 
+/* ACPI 1.0b: 6.4.2.5 I/O Port Descriptor */
+Aml *aml_io(AmlIODecode dec, uint16_t min_base, uint16_t max_base,
+            uint8_t aln, uint8_t len)
+{
+    Aml *var = aml_alloc();
+    build_append_byte(var->buf, 0x47); /* IO port descriptor */
+    build_append_byte(var->buf, dec);
+    build_append_byte(var->buf, min_base & 0xff);
+    build_append_byte(var->buf, (min_base >> 8) & 0xff);
+    build_append_byte(var->buf, max_base & 0xff);
+    build_append_byte(var->buf, (max_base >> 8) & 0xff);
+    build_append_byte(var->buf, aln);
+    build_append_byte(var->buf, len);
+    return var;
+}
+
 /* ACPI 1.0b: 16.2.5.3 Type 1 Opcodes Encoding: DefIfElse */
 Aml *aml_if(Aml *predicate)
 {
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 6a8aaef..3dab2b5 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -31,6 +31,11 @@ struct Aml {
 };
 typedef struct Aml Aml;
 
+typedef enum {
+    aml_decode10 = 0,
+    aml_decode16 = 1,
+} AmlIODecode;
+
 /**
  * init_aml_allocator:
  * @linker: linker that used by API for registering ACPI tables
@@ -82,6 +87,8 @@ Aml *aml_call1(const char *method, Aml *arg1);
 Aml *aml_call2(const char *method, Aml *arg1, Aml *arg2);
 Aml *aml_call3(const char *method, Aml *arg1, Aml *arg2, Aml *arg3);
 Aml *aml_call4(const char *method, Aml *arg1, Aml *arg2, Aml *arg3, Aml *arg4);
+Aml *aml_io(AmlIODecode dec, uint16_t min_base, uint16_t max_base,
+            uint8_t aln, uint8_t len);
 
 /* Block AML object primitives */
 Aml *aml_def_block(const char *signature, uint8_t revision,
-- 
1.8.3.1