Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 1 | /* |
Dan Handley | e83b0ca | 2014-01-14 18:17:09 +0000 | [diff] [blame] | 2 | * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 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 <stdio.h> |
| 32 | #include <string.h> |
| 33 | #include <errno.h> |
| 34 | #include <assert.h> |
| 35 | #include <arch_helpers.h> |
| 36 | #include <console.h> |
| 37 | #include <platform.h> |
| 38 | #include <semihosting.h> |
| 39 | #include <bl_common.h> |
| 40 | #include <psci.h> |
Achin Gupta | c8afc78 | 2013-11-25 18:45:02 +0000 | [diff] [blame] | 41 | #include <runtime_svc.h> |
Achin Gupta | 07f4e07 | 2014-02-02 12:02:23 +0000 | [diff] [blame^] | 42 | #include <context.h> |
Achin Gupta | 7421b46 | 2014-02-01 18:53:26 +0000 | [diff] [blame] | 43 | #include <debug.h> |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 44 | |
| 45 | /******************************************************************************* |
Achin Gupta | 7421b46 | 2014-02-01 18:53:26 +0000 | [diff] [blame] | 46 | * The 'rt_svc_descs' array holds the runtime service descriptors exported by |
| 47 | * services by placing them in the 'rt_svc_descs' linker section. |
| 48 | * The 'rt_svc_descs_indices' array holds the index of a descriptor in the |
| 49 | * 'rt_svc_descs' array. When an SMC arrives, the OEN[29:24] bits and the call |
| 50 | * type[31] bit in the function id are combined to get an index into the |
| 51 | * 'rt_svc_descs_indices' array. This gives the index of the descriptor in the |
| 52 | * 'rt_svc_descs' array which contains the SMC handler. |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 53 | ******************************************************************************/ |
Achin Gupta | 7421b46 | 2014-02-01 18:53:26 +0000 | [diff] [blame] | 54 | #define RT_SVC_DESCS_START ((uint64_t) (&__RT_SVC_DESCS_START__)) |
| 55 | #define RT_SVC_DESCS_END ((uint64_t) (&__RT_SVC_DESCS_END__)) |
| 56 | uint8_t rt_svc_descs_indices[MAX_RT_SVCS]; |
| 57 | static rt_svc_desc *rt_svc_descs; |
| 58 | |
| 59 | /******************************************************************************* |
| 60 | * Simple routine to sanity check a runtime service descriptor before using it |
| 61 | ******************************************************************************/ |
| 62 | static int32_t validate_rt_svc_desc(rt_svc_desc *desc) |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 63 | { |
Achin Gupta | 7421b46 | 2014-02-01 18:53:26 +0000 | [diff] [blame] | 64 | if (desc == NULL) |
| 65 | return -EINVAL; |
| 66 | |
| 67 | if (desc->start_oen > desc->end_oen) |
| 68 | return -EINVAL; |
| 69 | |
| 70 | if (desc->end_oen >= OEN_LIMIT) |
| 71 | return -EINVAL; |
| 72 | |
| 73 | if (desc->call_type != SMC_TYPE_FAST && desc->call_type != SMC_TYPE_STD) |
| 74 | return -EINVAL; |
| 75 | |
| 76 | /* A runtime service having no init or handle function doesn't make sense */ |
| 77 | if (desc->init == NULL && desc->handle == NULL) |
| 78 | return -EINVAL; |
| 79 | |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | /******************************************************************************* |
| 84 | * This function calls the initialisation routine in the descriptor exported by |
| 85 | * a runtime service. Once a descriptor has been validated, its start & end |
| 86 | * owning entity numbers and the call type are combined to form a unique oen. |
| 87 | * The unique oen is used as an index into the 'rt_svc_descs_indices' array. |
| 88 | * The index of the runtime service descriptor is stored at this index. |
| 89 | ******************************************************************************/ |
| 90 | void runtime_svc_init() |
| 91 | { |
| 92 | int32_t rc = 0; |
| 93 | uint32_t index, start_idx, end_idx; |
| 94 | uint64_t rt_svc_descs_num; |
| 95 | |
| 96 | /* If no runtime services are implemented then simply bail out */ |
| 97 | rt_svc_descs_num = RT_SVC_DESCS_END - RT_SVC_DESCS_START; |
| 98 | rt_svc_descs_num /= sizeof(rt_svc_desc); |
| 99 | if (rt_svc_descs_num == 0) |
| 100 | return; |
| 101 | |
| 102 | /* Initialise internal variables to invalid state */ |
| 103 | memset(rt_svc_descs_indices, -1, sizeof(rt_svc_descs_indices)); |
| 104 | |
| 105 | rt_svc_descs = (rt_svc_desc *) RT_SVC_DESCS_START; |
| 106 | for (index = 0; index < rt_svc_descs_num; index++) { |
| 107 | |
| 108 | /* |
| 109 | * An invalid descriptor is an error condition since it is |
| 110 | * difficult to predict the system behaviour in the absence |
| 111 | * of this service. |
| 112 | */ |
| 113 | rc = validate_rt_svc_desc(&rt_svc_descs[index]); |
| 114 | if (rc) { |
| 115 | ERROR("Invalid runtime service descriptor 0x%x (%s)\n", |
| 116 | &rt_svc_descs[index], |
| 117 | rt_svc_descs[index].name); |
| 118 | goto error; |
| 119 | } |
| 120 | |
| 121 | /* |
| 122 | * Fill the indices corresponding to the start and end owning |
| 123 | * entity numbers with the index of the descriptor which will |
| 124 | * handle the SMCs for this owning entity range. |
| 125 | */ |
| 126 | start_idx = get_unique_oen(rt_svc_descs[index].start_oen, |
| 127 | rt_svc_descs[index].call_type); |
| 128 | end_idx = get_unique_oen(rt_svc_descs[index].end_oen, |
| 129 | rt_svc_descs[index].call_type); |
| 130 | for (; start_idx <= end_idx; start_idx++) |
| 131 | rt_svc_descs_indices[start_idx] = index; |
| 132 | |
| 133 | /* Call the initialisation routine for this runtime service */ |
| 134 | rc = rt_svc_descs[index].init(); |
| 135 | if (rc) { |
| 136 | ERROR("Error initializing runtime service %s\n", |
| 137 | rt_svc_descs[index].name); |
| 138 | goto error; |
| 139 | } |
| 140 | } |
| 141 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 142 | return; |
Achin Gupta | 7421b46 | 2014-02-01 18:53:26 +0000 | [diff] [blame] | 143 | error: |
| 144 | panic(); |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 145 | } |
Achin Gupta | 07f4e07 | 2014-02-02 12:02:23 +0000 | [diff] [blame^] | 146 | |
| 147 | void fault_handler(void *handle) |
| 148 | { |
| 149 | gp_regs_next *gpregs_ctx = get_gpregs_ctx(handle); |
| 150 | ERROR("Unhandled synchronous fault. Register dump @ 0x%x \n", |
| 151 | gpregs_ctx); |
| 152 | panic(); |
| 153 | } |