HACK: Pass data from firmware to kernel

lib/chromeos/os_storage.c

 /*
  * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Alternatively, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  */
 
@@ skipping 196 matching lines @@
         debug(PREFIX "LoadKernel status: %d\n", status);
         if (status == LOAD_KERNEL_SUCCESS) {
                 debug(PREFIX "partition_number:   0x%08x\n",
                                 (int) params->partition_number);
                 debug(PREFIX "bootloader_address: 0x%08x\n",
                                 (int) params->bootloader_address);
                 debug(PREFIX "bootloader_size:    0x%08x\n",
                                 (int) params->bootloader_size);
         }
 
+        /*
+         * TODO(clchiou): This is an urgent hack for bringing up factory. We
+         * fill in data that will be used by kernel at last 1MB space.
+         *
+         * Rewrite this part after the protocol specification between
+         * Chrome OS firmware and kernel is finalized.
+         */
+        if (status == LOAD_KERNEL_SUCCESS) {
+                DECLARE_GLOBAL_DATA_PTR;
+
+                struct kernel_shared_data {
+                        uint32_t        chsw;
+                        uint8_t         hwid[256];
+                        uint32_t        fwid;

[rongchang, 2011/04/06 11:52:04]

fwid & frid are asciiz too

[Che-Liang Chiou, 2011/04/07 11:17:32]

Done.

+                        uint32_t        frid;
+                        uint32_t        binf[4];

[rongchang, 2011/04/06 11:52:04]

binf[5]

[Che-Liang Chiou, 2011/04/07 11:17:32]

Done.

+                        uint32_t        gpio;

[rongchang, 2011/04/06 11:52:04]

gpio[11]

[Che-Liang Chiou, 2011/04/07 11:17:32]

Done.

+                        uint32_t        vbnv[2];
+                        uint64_t        fmap_start_address;
+                } __attributed__((packed)) *sd;
+                sd = (struct kernel_shared_data*) (
+                                gd->bd->bi_dram[CONFIG_NR_DRAM_BANKS-1].start +
+                                gd->bd->bi_dram[CONFIG_NR_DRAM_BANKS-1].size -
+                                SZ_1M);
+
+                /* TODO fill in shared data */
+                memset(sd, '\0', sizeof(*sd));
+        }
+
         return status;
 }