[Qemu-devel] [PATCH v2 32/47] acpi: add acpi_eisaid() term

[Igor Mammedov]

Signed-off-by: Igor Mammedov <address@hidden>
---
 hw/acpi/acpi-build-utils.c         | 31 +++++++++++++++++++++++++++++++
 include/hw/acpi/acpi-build-utils.h |  1 +
 2 files changed, 32 insertions(+)

diff --git a/hw/acpi/acpi-build-utils.c b/hw/acpi/acpi-build-utils.c
index e51196b..cbc1241 100644
--- a/hw/acpi/acpi-build-utils.c
+++ b/hw/acpi/acpi-build-utils.c
@@ -23,7 +23,9 @@
 #include <stdarg.h>
 #include <assert.h>
 #include <stdbool.h>
+#include <string.h>
 #include "hw/acpi/acpi-build-utils.h"
+#include "qemu/bswap.h"
 
 GArray *build_alloc_array(void)
 {
@@ -659,3 +661,32 @@ acpi_processor(uint8_t proc_id, uint32_t pblk_addr, 
uint8_t pblk_len,
     build_append_byte(var.buf, pblk_len); /* PblkLen */
     return var;
 }
+
+static uint8_t Hex2Digit(char c)
+{
+    if (c >= 'A') {
+        return c - 'A' + 10;
+    }
+
+    return c - '0';
+}
+
+/* ACPI 5.0: 19.5.36 EISAID (EISA ID String To Integer Conversion Macro) */
+AcpiAml acpi_eisaid(const char *str)
+{
+    AcpiAml var = aml_allocate_internal(0, NON_BLOCK);
+    uint32_t id;
+
+    g_assert(strlen(str) == 7);
+    id = (str[0] - 0x40) << 26 |
+    (str[1] - 0x40) << 21 |
+    (str[2] - 0x40) << 16 |
+    Hex2Digit(str[3]) << 12 |
+    Hex2Digit(str[4]) << 8 |
+    Hex2Digit(str[5]) << 4 |
+    Hex2Digit(str[6]);
+
+    build_append_byte(var.buf, 0x0C); /* DWordPrefix */
+    build_append_value(var.buf, bswap32(id), sizeof(id));
+    return var;
+}
diff --git a/include/hw/acpi/acpi-build-utils.h 
b/include/hw/acpi/acpi-build-utils.h
index 753171f..02d5aa8 100644
--- a/include/hw/acpi/acpi-build-utils.h
+++ b/include/hw/acpi/acpi-build-utils.h
@@ -64,6 +64,7 @@ AcpiAml acpi_equal(AcpiAml arg1, AcpiAml arg2);
 AcpiAml GCC_FMT_ATTR(4, 5)
 acpi_processor(uint8_t proc_id, uint32_t pblk_addr, uint8_t pblk_len,
                const char *name_format, ...);
+AcpiAml acpi_eisaid(const char *str);
 
 /* Block ASL object primitives */
 AcpiAml acpi_if(AcpiAml predicate);
-- 
1.8.3.1