1 /* 2 * Copyright (c) 2014-2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <assert.h> 32 #include <debug.h> 33 #include <io_driver.h> 34 #include <io_storage.h> 35 #include <io_semihosting.h> 36 #include <plat_arm.h> 37 38 /* IO devices */ 39 static const io_dev_connector_t *sh_dev_con; 40 static uintptr_t sh_dev_handle; 41 42 43 static int open_semihosting(const uintptr_t spec) 44 { 45 int result = IO_FAIL; 46 uintptr_t local_image_handle; 47 48 /* See if the file exists on semi-hosting.*/ 49 result = io_dev_init(sh_dev_handle, (uintptr_t)NULL); 50 if (result == IO_SUCCESS) { 51 result = io_open(sh_dev_handle, spec, &local_image_handle); 52 if (result == IO_SUCCESS) { 53 VERBOSE("Using Semi-hosting IO\n"); 54 io_close(local_image_handle); 55 } 56 } 57 return result; 58 } 59 60 void plat_arm_io_setup(void) 61 { 62 int io_result; 63 64 arm_io_setup(); 65 66 /* Register the additional IO devices on this platform */ 67 io_result = register_io_dev_sh(&sh_dev_con); 68 assert(io_result == IO_SUCCESS); 69 70 /* Open connections to devices and cache the handles */ 71 io_result = io_dev_open(sh_dev_con, (uintptr_t)NULL, &sh_dev_handle); 72 assert(io_result == IO_SUCCESS); 73 74 /* Ignore improbable errors in release builds */ 75 (void)io_result; 76 } 77 78 int plat_arm_get_alt_image_source( 79 const uintptr_t image_spec, 80 uintptr_t *dev_handle) 81 { 82 int result = open_semihosting(image_spec); 83 if (result == IO_SUCCESS) 84 *dev_handle = sh_dev_handle; 85 86 return result; 87 } 88