From: "Michael S. Tsirkin" <m...@redhat.com>
Based on a patch by Igor Mammedov.
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
include/hw/acpi/aml-build.h | 5 +++++
hw/acpi/aml-build.c | 21 +++++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 6c36903..10c7946 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -346,6 +346,11 @@ Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed min_fixed,
uint64_t len);
Aml *aml_dma(AmlDmaType typ, AmlDmaBusMaster bm, AmlTransferSize sz,
uint8_t channel);
+Aml *aml_register(AmlAddressSpace as,
+ uint8_t bit_width,
+ uint8_t bit_offset,
+ uint64_t address,
+ uint8_t access_size);
Aml *aml_sleep(uint64_t msec);
/* Block AML object primitives */
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 1e43cd7..def62b3 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -874,6 +874,27 @@ Aml *aml_irq_no_flags(uint8_t irq)
return var;
}
+/*
+ * ACPI: 2.0: 16.2.4.16 ASL Macro for Generic Register Descriptor
+ *
+ * access_size comes from:
+ * ACPI 3.0: 17.5.98 Register (Generic Register Resource Descriptor Macro)
+ */
+Aml *aml_register(AmlAddressSpace as,
+ uint8_t bit_width,
+ uint8_t bit_offset,
+ uint64_t address,
+ uint8_t access_size)
+{
+ Aml *var = aml_alloc();
+
+ build_append_byte(var->buf, 0x82); /* Generic Register Descriptor */
+ build_append_byte(var->buf, 0x0C); /* Length, bits[7:0] */
+ build_append_byte(var->buf, 0x0); /* Length, bits[15:8] */
+ build_append_gas(var->buf, as, bit_width, bit_offset, access_size,
address);
+ return var;
+}
+
/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefLNot */
Aml *aml_lnot(Aml *arg)
{
--
2.7.4
