hw/acpi/aml-build: Add aml_interrupt() term

Add aml_interrupt() for describing device interrupt in resource template.
These can be used to generating DSDT table for ACPI on ARM.

Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 1432522520-8068-7-git-send-email-zhaoshenglong@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 69 insertions, 0 deletions

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index ad4d7ea212..0d9994146d 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -533,6 +533,33 @@ Aml *aml_memory32_fixed(uint32_t addr, uint32_t size,
     return var;
 }
 
+/*
+ * ACPI 5.0: 6.4.3.6 Extended Interrupt Descriptor
+ * Type 1, Large Item Name 0x9
+ */
+Aml *aml_interrupt(AmlConsumerAndProducer con_and_pro,
+                   AmlLevelAndEdge level_and_edge,
+                   AmlActiveHighAndLow high_and_low, AmlShared shared,
+                   uint32_t irq)
+{
+    Aml *var = aml_alloc();
+    uint8_t irq_flags = con_and_pro | (level_and_edge << 1)
+                        | (high_and_low << 2) | (shared << 3);
+
+    build_append_byte(var->buf, 0x89); /* Extended irq descriptor */
+    build_append_byte(var->buf, 6); /* Length, bits[7:0] minimum value = 6 */
+    build_append_byte(var->buf, 0); /* Length, bits[15:8] minimum value = 0 */
+    build_append_byte(var->buf, irq_flags); /* Interrupt Vector Information. */
+    build_append_byte(var->buf, 0x01);      /* Interrupt table length = 1 */
+
+    /* Interrupt Number */
+    build_append_byte(var->buf, extract32(irq, 0, 8));  /* bits[7:0] */
+    build_append_byte(var->buf, extract32(irq, 8, 8));  /* bits[15:8] */
+    build_append_byte(var->buf, extract32(irq, 16, 8)); /* bits[23:16] */
+    build_append_byte(var->buf, extract32(irq, 24, 8)); /* bits[31:24] */
+    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)
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index bd0d9e7031..df234796c6 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -111,6 +111,44 @@ typedef enum {
     AML_READ_WRITE = 1,
 } AmlReadAndWrite;
 
+/*
+ * ACPI 5.0: Table 6-187 Extended Interrupt Descriptor Definition
+ * Interrupt Vector Flags Bits[0] Consumer/Producer
+ */
+typedef enum {
+    AML_CONSUMER_PRODUCER = 0,
+    AML_CONSUMER = 1,
+} AmlConsumerAndProducer;
+
+/*
+ * ACPI 5.0: Table 6-187 Extended Interrupt Descriptor Definition
+ * _HE field definition
+ */
+typedef enum {
+    AML_LEVEL = 0,
+    AML_EDGE = 1,
+} AmlLevelAndEdge;
+
+/*
+ * ACPI 5.0: Table 6-187 Extended Interrupt Descriptor Definition
+ * _LL field definition
+ */
+typedef enum {
+    AML_ACTIVE_HIGH = 0,
+    AML_ACTIVE_LOW = 1,
+} AmlActiveHighAndLow;
+
+/*
+ * ACPI 5.0: Table 6-187 Extended Interrupt Descriptor Definition
+ * _SHR field definition
+ */
+typedef enum {
+    AML_EXCLUSIVE = 0,
+    AML_SHARED = 1,
+    AML_EXCLUSIVE_AND_WAKE = 2,
+    AML_SHARED_AND_WAKE = 3,
+} AmlShared;
+
 typedef
 struct AcpiBuildTables {
     GArray *table_data;
@@ -170,6 +208,10 @@ 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_memory32_fixed(uint32_t addr, uint32_t size,
                         AmlReadAndWrite read_and_write);
+Aml *aml_interrupt(AmlConsumerAndProducer con_and_pro,
+                   AmlLevelAndEdge level_and_edge,
+                   AmlActiveHighAndLow high_and_low, AmlShared shared,
+                   uint32_t irq);
 Aml *aml_io(AmlIODecode dec, uint16_t min_base, uint16_t max_base,
             uint8_t aln, uint8_t len);
 Aml *aml_operation_region(const char *name, AmlRegionSpace rs,