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authorShannon Zhao <shannon.zhao@linaro.org>2015-05-29 11:28:57 +0100
committerPeter Maydell <peter.maydell@linaro.org>2015-05-29 11:28:57 +0100
commited8b5847e46c24d6e9c286892a00a34bee9b0835 (patch)
tree6dce14b1bc5b8bad370c83ca36bea458cb61a533 /hw/acpi/aml-build.c
parent8434488400971c6793893b8c9547bc6b97e076ce (diff)
hw/acpi/aml-build: Make aml_buffer() definition consistent with the spec
According to ACPI spec, DefBuffer can take two parameters: BufferSize and ByteList. Make it consistent with the spec. Uninitialized buffer could be requested by passing ByteList as NULL to reserve space. Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com> Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-id: 1432522520-8068-15-git-send-email-zhaoshenglong@huawei.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/acpi/aml-build.c')
-rw-r--r--hw/acpi/aml-build.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index de19c63c75..22478c2220 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -642,10 +642,22 @@ Aml *aml_resource_template(void)
return var;
}
-/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefBuffer */
-Aml *aml_buffer(void)
+/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefBuffer
+ * Pass byte_list as NULL to request uninitialized buffer to reserve space.
+ */
+Aml *aml_buffer(int buffer_size, uint8_t *byte_list)
{
+ int i;
Aml *var = aml_bundle(0x11 /* BufferOp */, AML_BUFFER);
+
+ for (i = 0; i < buffer_size; i++) {
+ if (byte_list == NULL) {
+ build_append_byte(var->buf, 0x0);
+ } else {
+ build_append_byte(var->buf, byte_list[i]);
+ }
+ }
+
return var;
}