[Qemu-devel] [PATCH v5 13/20] 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         | 40 ++++++++++++++++++++++++++++++++++++++++
 include/hw/acpi/aml-build.h |  1 +
 2 files changed, 41 insertions(+)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index b99bb13..316d5a5 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -25,6 +25,7 @@
 #include <stdbool.h>
 #include <string.h>
 #include "hw/acpi/aml-build.h"
+#include "qemu-common.h"
 #include "qemu/bswap.h"
 #include "qemu/bitops.h"
 #include "hw/acpi/bios-linker-loader.h"
@@ -948,6 +949,45 @@ Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed min_fixed,
                              addr_trans, len, flags);
 }
 
+/*
+ * ACPI 3.0: 17.5.124 ToUUID (Convert String to UUID Macro)
+ * e.g. UUID: E5C937D0-3553-4d7a-9117-EA4D19C3434D
+ * call aml_touuid("E5C937D0-3553-4d7a-9117-EA4D19C3434D");
+ */
+Aml *aml_touuid(const char *uuid)
+{
+    int i;
+    long int val;
+    char *end;
+    const char *start = uuid;
+    Aml *UUID = aml_buffer();
+
+    val = strtol(start, &end, 16);
+    g_assert((end - start) == 8);
+    build_append_int_noprefix(UUID->buf, val, 4);
+    start = end + 1;
+    val = strtol(start, &end, 16);
+    g_assert((end - start) == 4);
+    build_append_int_noprefix(UUID->buf, val, 2);
+    start = end + 1;
+    val = strtol(start, &end, 16);
+    g_assert((end - start) == 4);
+    build_append_int_noprefix(UUID->buf, val, 2);
+    start = end + 1;
+    val = strtol(start, &end, 16);
+    g_assert((end - start) == 4);
+    build_append_int_noprefix(UUID->buf, (val >> 8) & 0xFF, 1);
+    build_append_int_noprefix(UUID->buf, val & 0xFF, 1);
+    start = end + 1;
+    val = strtol(start, &end, 16);
+    g_assert((end - start) == 12);
+    for (i = 40; i >= 0; i -= 8) {
+        build_append_int_noprefix(UUID->buf, (val >> i) & 0xFF, 1);
+    }
+
+    return UUID;
+}
+
 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 d1b9fe7..b41fd0c 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -259,6 +259,7 @@ Aml *aml_buffer(void);
 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