[app][lkboot] modularlize lkboot, add secondary DCC channel, remove large buffer

Change-Id: I5a59f06c909722fe7269aa0991da10fa1ea8196e

app/lkboot/pdcc.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2015 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#pragma once
+
+#include <stdint.h>
+
+/* in memory and DCC descriptors for the PDCC protocol */
+
+/* shared outside of lk repository, be careful of modifications */
+#define PDCC_VERSION 1
+
+struct pdcc_buffer_descriptor {
+    uint32_t version;
+
+    uint32_t htod_buffer_phys;
+    uint32_t htod_buffer_len;
+
+    uint32_t dtoh_buffer_phys;
+    uint32_t dtoh_buffer_len;
+};
+
+#define PDCC_VALID (1<<31)
+#define PDCC_OPCODE_SHIFT (24)
+#define PDCC_OPCODE(x) (((x) >> PDCC_OPCODE_SHIFT) & 0x7f)
+#define PDCC_DATA(x) ((x) & 0x00ffffff);
+
+enum {
+    PDCC_OP_RESET = 0,
+    PDCC_OP_BUF_HEADER,
+    PDCC_OP_UPDATE_OUT_INDEX,
+    PDCC_OP_CONSUMED_IN,
+};
+