[Qemu-devel] [PATCH v4 05/20] hw/acpi/aml-build: Add aml_interrupt() term

[Shannon Zhao <zhaoshenglong@huawei.com>]

From: Shannon Zhao <shannon.zhao@linaro.org>

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>
---
 hw/acpi/aml-build.c         | 18 ++++++++++++++++++
 include/hw/acpi/aml-build.h |  1 +
 2 files changed, 19 insertions(+)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index fefe7c7..bd1713c 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -527,6 +527,24 @@ Aml *aml_memory32_fixed(uint64_t addr, uint64_t size, uint8_t rw_flag)
     return var;
 }
 
+/*
+ * ACPI 1.0: 6.4.3.6 Interrupt (Interrupt Resource Descriptor Macro)
+ */
+Aml *aml_interrupt(uint8_t irq_flags, int irq)
+{
+    Aml *var = aml_alloc();
+    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 */
+    build_append_byte(var->buf, irq & 0xff); /* Interrupt Number bits[7:0] */
+    build_append_byte(var->buf, (irq >> 8) & 0xff); /* Interrupt Number bits[15:8] */
+    build_append_byte(var->buf, (irq >> 16) & 0xff); /* Interrupt Number bits[23:16] */
+    build_append_byte(var->buf, (irq >> 24) & 0xff); /* Interrupt Number 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 baa0652..315c729 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -163,6 +163,7 @@ 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_memory32_fixed(uint64_t addr, uint64_t size, uint8_t rw_flag);
+Aml *aml_interrupt(uint8_t irq_flags, int 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,
-- 
2.0.4