[Qemu-devel] [RFC 22/47] acpi: add acpi_io() helper

[Igor Mammedov]

Signed-off-by: Igor Mammedov <address@hidden>
---
 hw/acpi/acpi_gen_utils.c         | 19 +++++++++++++++++++
 include/hw/acpi/acpi_gen_utils.h |  7 +++++++
 2 files changed, 26 insertions(+)

diff --git a/hw/acpi/acpi_gen_utils.c b/hw/acpi/acpi_gen_utils.c
index 01d5c77..e9b2606 100644
--- a/hw/acpi/acpi_gen_utils.c
+++ b/hw/acpi/acpi_gen_utils.c
@@ -429,6 +429,25 @@ AcpiAml acpi_call4(const char *method, AcpiAml arg1, 
AcpiAml arg2,
     return var;
 }
 
+/*
+ * ACPI 5.0: 19.5.62 IO (IO Resource Descriptor Macro)
+ *           6.4.2 Small Resource Data Type
+*/
+AcpiAml acpi_io(acpiIODecode dec, uint16_t min_base, uint16_t max_base,
+                uint8_t aln, uint8_t len)
+{
+    AcpiAml var = aml_allocate_internal(0, NON_BLOCK);
+    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 5.0: 20.2.5.3 Type 1 Opcodes Encoding: DefIfElse */
 AcpiAml acpi_if(AcpiAml predicate)
 {
diff --git a/include/hw/acpi/acpi_gen_utils.h b/include/hw/acpi/acpi_gen_utils.h
index 594fae7..91575f1 100644
--- a/include/hw/acpi/acpi_gen_utils.h
+++ b/include/hw/acpi/acpi_gen_utils.h
@@ -19,6 +19,11 @@ typedef struct AcpiAml {
     AcpiBlockFlags block_flags;
 } AcpiAml;
 
+typedef enum {
+    acpi_decode10 = 0,
+    acpi_decode16 = 1,
+} acpiIODecode;
+
 void aml_append(AcpiAml *parent_ctx, AcpiAml child);
 
 /* non block ASL object primitives */
@@ -39,6 +44,8 @@ AcpiAml acpi_call3(const char *method, AcpiAml arg1, AcpiAml 
arg2,
                    AcpiAml arg3);
 AcpiAml acpi_call4(const char *method, AcpiAml arg1, AcpiAml arg2,
                    AcpiAml arg3, AcpiAml arg4);
+AcpiAml acpi_io(acpiIODecode dec, uint16_t min_base, uint16_t max_base,
+                uint8_t aln, uint8_t len);
 
 /* Block ASL object primitives */
 AcpiAml acpi_if(AcpiAml predicate);
-- 
1.8.3.1