| Catalin Marinas | 53631b5 | 2012-03-05 11:49:32 +0000 | [diff] [blame] | 1 | /* |
| 2 | * FP/SIMD state saving and restoring |
| 3 | * |
| 4 | * Copyright (C) 2012 ARM Ltd. |
| 5 | * Author: Catalin Marinas <catalin.marinas@arm.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/linkage.h> |
| 21 | |
| 22 | #include <asm/assembler.h> |
| 23 | |
| 24 | /* |
| 25 | * Save the FP registers. |
| 26 | * |
| 27 | * x0 - pointer to struct fpsimd_state |
| 28 | */ |
| 29 | ENTRY(fpsimd_save_state) |
| 30 | stp q0, q1, [x0, #16 * 0] |
| 31 | stp q2, q3, [x0, #16 * 2] |
| 32 | stp q4, q5, [x0, #16 * 4] |
| 33 | stp q6, q7, [x0, #16 * 6] |
| 34 | stp q8, q9, [x0, #16 * 8] |
| 35 | stp q10, q11, [x0, #16 * 10] |
| 36 | stp q12, q13, [x0, #16 * 12] |
| 37 | stp q14, q15, [x0, #16 * 14] |
| 38 | stp q16, q17, [x0, #16 * 16] |
| 39 | stp q18, q19, [x0, #16 * 18] |
| 40 | stp q20, q21, [x0, #16 * 20] |
| 41 | stp q22, q23, [x0, #16 * 22] |
| 42 | stp q24, q25, [x0, #16 * 24] |
| 43 | stp q26, q27, [x0, #16 * 26] |
| 44 | stp q28, q29, [x0, #16 * 28] |
| 45 | stp q30, q31, [x0, #16 * 30]! |
| 46 | mrs x8, fpsr |
| 47 | str w8, [x0, #16 * 2] |
| 48 | mrs x8, fpcr |
| 49 | str w8, [x0, #16 * 2 + 4] |
| 50 | ret |
| 51 | ENDPROC(fpsimd_save_state) |
| 52 | |
| 53 | /* |
| 54 | * Load the FP registers. |
| 55 | * |
| 56 | * x0 - pointer to struct fpsimd_state |
| 57 | */ |
| 58 | ENTRY(fpsimd_load_state) |
| 59 | ldp q0, q1, [x0, #16 * 0] |
| 60 | ldp q2, q3, [x0, #16 * 2] |
| 61 | ldp q4, q5, [x0, #16 * 4] |
| 62 | ldp q6, q7, [x0, #16 * 6] |
| 63 | ldp q8, q9, [x0, #16 * 8] |
| 64 | ldp q10, q11, [x0, #16 * 10] |
| 65 | ldp q12, q13, [x0, #16 * 12] |
| 66 | ldp q14, q15, [x0, #16 * 14] |
| 67 | ldp q16, q17, [x0, #16 * 16] |
| 68 | ldp q18, q19, [x0, #16 * 18] |
| 69 | ldp q20, q21, [x0, #16 * 20] |
| 70 | ldp q22, q23, [x0, #16 * 22] |
| 71 | ldp q24, q25, [x0, #16 * 24] |
| 72 | ldp q26, q27, [x0, #16 * 26] |
| 73 | ldp q28, q29, [x0, #16 * 28] |
| 74 | ldp q30, q31, [x0, #16 * 30]! |
| 75 | ldr w8, [x0, #16 * 2] |
| 76 | ldr w9, [x0, #16 * 2 + 4] |
| 77 | msr fpsr, x8 |
| 78 | msr fpcr, x9 |
| 79 | ret |
| 80 | ENDPROC(fpsimd_load_state) |