[Qemu-devel] [PATCH v6 14/22] hw/acpi/aml-build: Add ToUUID macro

[Shannon Zhao]

From: Shannon Zhao <address@hidden>

Add ToUUID macro, this is useful for generating PCIe ACPI table.

Signed-off-by: Shannon Zhao <address@hidden>
Signed-off-by: Shannon Zhao <address@hidden>
---
 hw/acpi/aml-build.c         | 46 +++++++++++++++++++++++++++++++++++++++++++++
 include/hw/acpi/aml-build.h |  1 +
 2 files changed, 47 insertions(+)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index a38a536..d9c9876 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -961,6 +961,52 @@ Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed min_fixed,
                              addr_trans, len, flags);
 }
 
+static uint8_t Hex2Byte(const char *src)
+{
+    int hi = Hex2Digit(*src++);
+    int lo = Hex2Digit(*src);
+
+    g_assert(((hi >= 0) && (hi <= 15)) && ((lo >= 0) && (lo <= 15)));
+    return (hi << 4) | lo;
+}
+
+/*
+ * ACPI 3.0: 17.5.124 ToUUID (Convert String to UUID Macro)
+ * e.g. UUID: aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
+ * call aml_touuid("aabbccdd-eeff-gghh-iijj-kkllmmnnoopp");
+ */
+Aml *aml_touuid(const char *uuid)
+{
+    Aml *var = aml_bundle(0x11 /* BufferOp */, AML_BUFFER);
+
+    /* format: aabbccdd-eeff-gghh-iijj-kkllmmnnoopp */
+    g_assert((strlen(uuid) == 36) && (uuid[8] == '-') && (uuid[13] == '-')
+              && (uuid[18] == '-') && (uuid[23] == '-'));
+
+    build_append_byte(var->buf, Hex2Byte(uuid + 6)); /* dd - at offset 00 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 4)); /* cc - at offset 01 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 2)); /* bb - at offset 02 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 0)); /* aa - at offset 03 */
+
+    build_append_byte(var->buf, Hex2Byte(uuid + 11)); /* ff - at offset 04 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 9)); /* ee - at offset 05 */
+
+    build_append_byte(var->buf, Hex2Byte(uuid + 16)); /* hh - at offset 06 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 14)); /* gg - at offset 07 */
+
+    build_append_byte(var->buf, Hex2Byte(uuid + 19)); /* ii - at offset 08 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 21)); /* jj - at offset 09 */
+
+    build_append_byte(var->buf, Hex2Byte(uuid + 24)); /* kk - at offset 10 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 26)); /* ll - at offset 11 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 28)); /* mm - at offset 12 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 30)); /* nn - at offset 13 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 32)); /* oo - at offset 14 */
+    build_append_byte(var->buf, Hex2Byte(uuid + 34)); /* pp - at offset 15 */
+
+    return var;
+}
+
 void
 build_header(GArray *linker, GArray *table_data,
              AcpiTableHeader *h, const char *sig, int len, uint8_t rev)
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 69d7813..7399f04 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -259,6 +259,7 @@ Aml *aml_buffer(int buffer_size, uint8_t *byte_list);
 Aml *aml_resource_template(void);
 Aml *aml_field(const char *name, AmlFieldFlags flags);
 Aml *aml_varpackage(uint32_t num_elements);
+Aml *aml_touuid(const char *uuid);
 
 void
 build_header(GArray *linker, GArray *table_data,
-- 
2.0.4