Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 1 | /* |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 2 | * Copyright (c) 2013-2015, 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 | |
Sandrine Bailleux | c10bd2c | 2013-11-12 16:41:16 +0000 | [diff] [blame] | 31 | #include <arch.h> |
Dan Handley | 2bd4ef2 | 2014-04-09 13:14:54 +0100 | [diff] [blame] | 32 | #include <bl_common.h> |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 33 | #include <el3_common_macros.S> |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 34 | |
| 35 | .globl bl31_entrypoint |
| 36 | |
| 37 | |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 38 | /* ----------------------------------------------------- |
| 39 | * bl31_entrypoint() is the cold boot entrypoint, |
| 40 | * executed only by the primary cpu. |
| 41 | * ----------------------------------------------------- |
| 42 | */ |
| 43 | |
Andrew Thoelke | 38bde41 | 2014-03-18 13:46:55 +0000 | [diff] [blame] | 44 | func bl31_entrypoint |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 45 | #if !RESET_TO_BL31 |
Vikram Kanigiri | da56743 | 2014-04-15 18:08:08 +0100 | [diff] [blame] | 46 | /* --------------------------------------------------------------- |
| 47 | * Preceding bootloader has populated x0 with a pointer to a |
| 48 | * 'bl31_params' structure & x1 with a pointer to platform |
| 49 | * specific structure |
| 50 | * --------------------------------------------------------------- |
Sandrine Bailleux | c10bd2c | 2013-11-12 16:41:16 +0000 | [diff] [blame] | 51 | */ |
Vikram Kanigiri | a3a5e4a | 2014-05-15 18:27:15 +0100 | [diff] [blame] | 52 | mov x20, x0 |
| 53 | mov x21, x1 |
Sandrine Bailleux | c10bd2c | 2013-11-12 16:41:16 +0000 | [diff] [blame] | 54 | |
Harry Liebel | 4f60368 | 2014-01-14 18:11:48 +0000 | [diff] [blame] | 55 | /* --------------------------------------------------------------------- |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 56 | * For !RESET_TO_BL31 systems, only the primary CPU ever reaches |
| 57 | * bl31_entrypoint() during the cold boot flow, so the cold/warm boot |
| 58 | * and primary/secondary CPU logic should not be executed in this case. |
Harry Liebel | 4f60368 | 2014-01-14 18:11:48 +0000 | [diff] [blame] | 59 | * |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 60 | * Also, assume that the previous bootloader has already set up the CPU |
| 61 | * endianness and has initialised the memory. |
Harry Liebel | 4f60368 | 2014-01-14 18:11:48 +0000 | [diff] [blame] | 62 | * --------------------------------------------------------------------- |
| 63 | */ |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 64 | el3_entrypoint_common \ |
| 65 | _set_endian=0 \ |
| 66 | _warm_boot_mailbox=0 \ |
| 67 | _secondary_cold_boot=0 \ |
| 68 | _init_memory=0 \ |
| 69 | _init_c_runtime=1 \ |
| 70 | _exception_vectors=runtime_exceptions |
Sandrine Bailleux | 65f546a | 2013-11-28 09:43:06 +0000 | [diff] [blame] | 71 | |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 72 | /* --------------------------------------------------------------------- |
| 73 | * Relay the previous bootloader's arguments to the platform layer |
| 74 | * --------------------------------------------------------------------- |
Jeenu Viswambharan | caa8493 | 2014-02-06 10:36:15 +0000 | [diff] [blame] | 75 | */ |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 76 | mov x0, x20 |
| 77 | mov x1, x21 |
| 78 | #else |
Sandrine Bailleux | 449dbd5 | 2015-06-02 17:19:43 +0100 | [diff] [blame] | 79 | /* --------------------------------------------------------------------- |
| 80 | * For RESET_TO_BL31 systems which have a programmable reset address, |
| 81 | * bl31_entrypoint() is executed only on the cold boot path so we can |
| 82 | * skip the warm boot mailbox mechanism. |
| 83 | * --------------------------------------------------------------------- |
| 84 | */ |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 85 | el3_entrypoint_common \ |
| 86 | _set_endian=1 \ |
Sandrine Bailleux | 449dbd5 | 2015-06-02 17:19:43 +0100 | [diff] [blame] | 87 | _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \ |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 88 | _secondary_cold_boot=1 \ |
| 89 | _init_memory=1 \ |
| 90 | _init_c_runtime=1 \ |
| 91 | _exception_vectors=runtime_exceptions |
Jeenu Viswambharan | caa8493 | 2014-02-06 10:36:15 +0000 | [diff] [blame] | 92 | |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 93 | /* --------------------------------------------------------------------- |
| 94 | * For RESET_TO_BL31 systems, BL3-1 is the first bootloader to run so |
| 95 | * there's no argument to relay from a previous bootloader. Zero the |
| 96 | * arguments passed to the platform layer to reflect that. |
| 97 | * --------------------------------------------------------------------- |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 98 | */ |
Sandrine Bailleux | acde8b0 | 2015-05-19 11:54:45 +0100 | [diff] [blame] | 99 | mov x0, 0 |
| 100 | mov x1, 0 |
| 101 | #endif /* RESET_TO_BL31 */ |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 102 | |
| 103 | /* --------------------------------------------- |
| 104 | * Perform platform specific early arch. setup |
| 105 | * --------------------------------------------- |
| 106 | */ |
Achin Gupta | 4f6ad66 | 2013-10-25 09:08:21 +0100 | [diff] [blame] | 107 | bl bl31_early_platform_setup |
| 108 | bl bl31_plat_arch_setup |
| 109 | |
| 110 | /* --------------------------------------------- |
Jeenu Viswambharan | caa8493 | 2014-02-06 10:36:15 +0000 | [diff] [blame] | 111 | * Jump to main function. |
Achin Gupta | b739f22 | 2014-01-18 16:50:09 +0000 | [diff] [blame] | 112 | * --------------------------------------------- |
| 113 | */ |
Jeenu Viswambharan | caa8493 | 2014-02-06 10:36:15 +0000 | [diff] [blame] | 114 | bl bl31_main |
Achin Gupta | b739f22 | 2014-01-18 16:50:09 +0000 | [diff] [blame] | 115 | |
Jeenu Viswambharan | caa8493 | 2014-02-06 10:36:15 +0000 | [diff] [blame] | 116 | b el3_exit |
Kévin Petit | a877c25 | 2015-03-24 14:03:57 +0000 | [diff] [blame] | 117 | endfunc bl31_entrypoint |