1 files changed, 49 insertions, 0 deletions
diff --git a/src/hw/xtensa/bootparam.h b/src/hw/xtensa/bootparam.h
new file mode 100644
index 0000000..955f4e8
--- /dev/null
+++ b/src/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