[Qemu-devel] [RESEND PATCH 14/23] 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>
Reviewed-by: Igor Mammedov <address@hidden>
---
 hw/acpi/aml-build.c         | 112 ++++++++++++++++++++++++++++++++++++++++++++
 include/hw/acpi/aml-build.h |   1 +
 2 files changed, 113 insertions(+)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 7fcc44e..bdcbad2 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -28,6 +28,8 @@
 #include "qemu/bswap.h"
 #include "qemu/bitops.h"
 #include "hw/acpi/bios-linker-loader.h"
+#include "qapi/error.h"
+#include "qemu-common.h"
 
 static GArray *build_alloc_array(void)
 {
@@ -955,6 +957,116 @@ Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed 
min_fixed,
                              addr_trans, len, flags);
 }
 
+static void String2Byte(const char *str, uint8_t *byte_list)
+{
+    unsigned long long val;
+    char *end;
+    const char *start = str;
+    int i, j = 0;
+    Error *err = NULL;
+
+    if (strlen(str) != 36) {
+        error_setg(&err, "Length of UUID string is not 36");
+        goto error;
+    }
+
+    val = strtoull(start, &end, 16);
+    if ((end - start) != 8) {
+        error_setg(&err, "Length of first part of UUID string is not 8");
+        goto error;
+    }
+    for (i = 3; i >= 0; i--) {
+        byte_list[j] = extract32(val, (8 * i), 8);
+        j++;
+    }
+    start = end + 1;
+
+    val = strtoull(start, &end, 16);
+    if ((end - start) != 4) {
+        error_setg(&err, "Length of second part of UUID string is not 4");
+        goto error;
+    }
+    for (i = 1; i >= 0; i--) {
+        byte_list[j] = extract32(val, (8 * i), 8);
+        j++;
+    }
+    start = end + 1;
+
+    val = strtoull(start, &end, 16);
+    if ((end - start) != 4) {
+        error_setg(&err, "Length of third part of UUID string is not 4");
+        goto error;
+    }
+    for (i = 1; i >= 0; i--) {
+        byte_list[j] = extract32(val, (8 * i), 8);
+        j++;
+    }
+    start = end + 1;
+
+    val = strtoull(start, &end, 16);
+    if ((end - start) != 4) {
+        error_setg(&err, "Length of fourth part of UUID string is not 4");
+        goto error;
+    }
+    for (i = 1; i >= 0; i--) {
+        byte_list[j] = extract32(val, (8 * i), 8);
+        j++;
+    }
+    start = end + 1;
+
+    val = strtoull(start, &end, 16);
+    if ((end - start) != 12) {
+        error_setg(&err, "Length of fifth part of UUID string is not 12");
+        goto error;
+    }
+    for (i = 5; i >= 0; i--) {
+        byte_list[j] = extract64(val, (8 * i), 8);
+        j++;
+    }
+
+    return;
+
+error:
+    error_report_err(err);
+    exit(1);
+}
+
+/*
+ * 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);
+    uint8_t byte_list[16];
+
+    String2Byte(uuid, byte_list);
+
+    build_append_byte(var->buf, byte_list[3]); /* dd - at offset 00 */
+    build_append_byte(var->buf, byte_list[2]); /* cc - at offset 01 */
+    build_append_byte(var->buf, byte_list[1]); /* bb - at offset 02 */
+    build_append_byte(var->buf, byte_list[0]); /* aa - at offset 03 */
+
+    build_append_byte(var->buf, byte_list[5]); /* ff - at offset 04 */
+    build_append_byte(var->buf, byte_list[4]); /* ee - at offset 05 */
+
+    build_append_byte(var->buf, byte_list[7]); /* hh - at offset 06 */
+    build_append_byte(var->buf, byte_list[6]); /* gg - at offset 07 */
+
+    build_append_byte(var->buf, byte_list[8]); /* ii - at offset 08 */
+    build_append_byte(var->buf, byte_list[9]); /* jj - at offset 09 */
+
+    build_append_byte(var->buf, byte_list[10]); /* kk - at offset 10 */
+    build_append_byte(var->buf, byte_list[11]); /* ll - at offset 11 */
+    build_append_byte(var->buf, byte_list[12]); /* mm - at offset 12 */
+    build_append_byte(var->buf, byte_list[13]); /* nn - at offset 13 */
+    build_append_byte(var->buf, byte_list[14]); /* oo - at offset 14 */
+    build_append_byte(var->buf, byte_list[15]); /* 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 fac70ea..a873b46 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -257,6 +257,7 @@ Aml *aml_buffer(int buffer_size, uint8_t *byte_list);
 Aml *aml_resource_template(void);
 Aml *aml_field(const char *name, AmlAccessType type, AmlUpdateRule rule);
 Aml *aml_varpackage(uint32_t num_elements);
+Aml *aml_touuid(const char *uuid);
 
 void
 build_header(GArray *linker, GArray *table_data,
-- 
2.0.4