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Diffstat (limited to 'qemu/hw/xtensa/bootparam.h')
-rw-r--r--qemu/hw/xtensa/bootparam.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/qemu/hw/xtensa/bootparam.h b/qemu/hw/xtensa/bootparam.h
new file mode 100644
index 000000000..955f4e86e
--- /dev/null
+++ b/qemu/hw/xtensa/bootparam.h
@@ -0,0 +1,49 @@
+#ifndef HW_XTENSA_BOOTPARAM
+#define HW_XTENSA_BOOTPARAM
+
+#define BP_TAG_COMMAND_LINE 0x1001 /* command line (0-terminated string)*/
+#define BP_TAG_INITRD 0x1002 /* ramdisk addr and size (bp_meminfo) */
+#define BP_TAG_MEMORY 0x1003 /* memory addr and size (bp_meminfo) */
+#define BP_TAG_SERIAL_BAUDRATE 0x1004 /* baud rate of current console. */
+#define BP_TAG_SERIAL_PORT 0x1005 /* serial device of current console */
+#define BP_TAG_FDT 0x1006 /* flat device tree addr */
+
+#define BP_TAG_FIRST 0x7B0B /* first tag with a version number */
+#define BP_TAG_LAST 0x7E0B /* last tag */
+
+typedef struct BpTag {
+ uint16_t tag;
+ uint16_t size;
+} BpTag;
+
+typedef struct BpMemInfo {
+ uint32_t type;
+ uint32_t start;
+ uint32_t end;
+} BpMemInfo;
+
+#define MEMORY_TYPE_CONVENTIONAL 0x1000
+#define MEMORY_TYPE_NONE 0x2000
+
+static inline size_t get_tag_size(size_t data_size)
+{
+ return data_size + sizeof(BpTag) + 4;
+}
+
+static inline ram_addr_t put_tag(ram_addr_t addr, uint16_t tag,
+ size_t size, const void *data)
+{
+ BpTag bp_tag = {
+ .tag = tswap16(tag),
+ .size = tswap16((size + 3) & ~3),
+ };
+
+ cpu_physical_memory_write(addr, &bp_tag, sizeof(bp_tag));
+ addr += sizeof(bp_tag);
+ cpu_physical_memory_write(addr, data, size);
+ addr += (size + 3) & ~3;
+
+ return addr;
+}
+
+#endif