From: Shannon Zhao <shannon.z...@linaro.org>
Add aml_memory32_fixed() for describing device mmio region in resource
template. These can be used to generating DSDT table for ACPI on ARM.
Signed-off-by: Shannon Zhao <zhaoshengl...@huawei.com>
Signed-off-by: Shannon Zhao <shannon.z...@linaro.org>
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
Reviewed-by: Igor Mammedov <imamm...@redhat.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
---
hw/acpi/aml-build.c | 28 ++++++++++++++++++++++++++++
include/hw/acpi/aml-build.h | 2 ++
2 files changed, 30 insertions(+)
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 7a478ae..ad4d7ea 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -26,6 +26,7 @@
#include <string.h>
#include "hw/acpi/aml-build.h"
#include "qemu/bswap.h"
+#include "qemu/bitops.h"
#include "hw/acpi/bios-linker-loader.h"
static GArray *build_alloc_array(void)
@@ -505,6 +506,33 @@ Aml *aml_call4(const char *method, Aml *arg1, Aml *arg2,
Aml *arg3, Aml *arg4)
return var;
}
+/*
+ * ACPI 1.0b: 6.4.3.4 32-Bit Fixed Location Memory Range Descriptor
+ * (Type 1, Large Item Name 0x6)
+ */
+Aml *aml_memory32_fixed(uint32_t addr, uint32_t size,
+ AmlReadAndWrite read_and_write)
+{
+ Aml *var = aml_alloc();
+ build_append_byte(var->buf, 0x86); /* Memory32Fixed Resource Descriptor */
+ build_append_byte(var->buf, 9); /* Length, bits[7:0] value = 9 */
+ build_append_byte(var->buf, 0); /* Length, bits[15:8] value = 0 */
+ build_append_byte(var->buf, read_and_write); /* Write status, 1 rw 0 ro */
+
+ /* Range base address */
+ build_append_byte(var->buf, extract32(addr, 0, 8)); /* bits[7:0] */
+ build_append_byte(var->buf, extract32(addr, 8, 8)); /* bits[15:8] */
+ build_append_byte(var->buf, extract32(addr, 16, 8)); /* bits[23:16] */
+ build_append_byte(var->buf, extract32(addr, 24, 8)); /* bits[31:24] */
+
+ /* Range length */
+ build_append_byte(var->buf, extract32(size, 0, 8)); /* bits[7:0] */
+ build_append_byte(var->buf, extract32(size, 8, 8)); /* bits[15:8] */
+ build_append_byte(var->buf, extract32(size, 16, 8)); /* bits[23:16] */
+ build_append_byte(var->buf, extract32(size, 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 c0e81d4..bd0d9e7 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -168,6 +168,8 @@ 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_memory32_fixed(uint32_t addr, uint32_t size,
+ AmlReadAndWrite read_and_write);
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
