| Varun Wadekar | c1d2a28 | 2016-11-08 15:46:48 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016, 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 <asm_macros.S> |
| 32 | |
| 33 | .macro push ra, rb, sp=sp |
| 34 | stp \ra, \rb, [\sp,#-16]! |
| 35 | .endm |
| 36 | |
| 37 | .macro pop ra, rb, sp=sp |
| 38 | ldp \ra, \rb, [\sp], #16 |
| 39 | .endm |
| 40 | |
| 41 | .global trusty_context_switch_helper |
| 42 | func trusty_context_switch_helper |
| 43 | push x8, xzr |
| 44 | push x19, x20 |
| 45 | push x21, x22 |
| 46 | push x23, x24 |
| 47 | push x25, x26 |
| 48 | push x27, x28 |
| 49 | push x29, x30 |
| 50 | |
| 51 | mov x9, sp |
| 52 | ldr x10, [x0] |
| 53 | mov sp, x10 |
| 54 | str x9, [x0] |
| 55 | |
| 56 | pop x29, x30 |
| 57 | pop x27, x28 |
| 58 | pop x25, x26 |
| 59 | pop x23, x24 |
| 60 | pop x21, x22 |
| 61 | pop x19, x20 |
| 62 | pop x8, xzr |
| 63 | stp x1, x2, [x8] |
| 64 | stp x3, x4, [x8, #16] |
| 65 | |
| 66 | ret |
| 67 | endfunc trusty_context_switch_helper |
| 68 | |
| 69 | .global trusty_init_context_stack |
| 70 | func trusty_init_context_stack |
| 71 | push x8, xzr, x1 |
| 72 | push xzr, xzr, x1 |
| 73 | push xzr, xzr, x1 |
| 74 | push xzr, xzr, x1 |
| 75 | push xzr, xzr, x1 |
| 76 | push xzr, xzr, x1 |
| 77 | adr x9, el3_exit |
| 78 | push xzr, x9, x1 |
| 79 | str x1, [x0] |
| 80 | ret |
| 81 | endfunc trusty_init_context_stack |