| Soby Mathew | d019487 | 2016-04-29 19:01:30 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2015-2016, 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 | #ifndef __SMCC_HELPERS_H__ |
| 32 | #define __SMCC_HELPERS_H__ |
| 33 | |
| 34 | #include <smcc.h> |
| 35 | |
| 36 | #ifndef __ASSEMBLY__ |
| 37 | #include <context.h> |
| 38 | |
| 39 | /* Convenience macros to return from SMC handler */ |
| 40 | #define SMC_RET0(_h) { \ |
| 41 | return (uint64_t) (_h); \ |
| 42 | } |
| 43 | #define SMC_RET1(_h, _x0) { \ |
| 44 | write_ctx_reg(get_gpregs_ctx(_h), CTX_GPREG_X0, (_x0)); \ |
| 45 | SMC_RET0(_h); \ |
| 46 | } |
| 47 | #define SMC_RET2(_h, _x0, _x1) { \ |
| 48 | write_ctx_reg(get_gpregs_ctx(_h), CTX_GPREG_X1, (_x1)); \ |
| 49 | SMC_RET1(_h, (_x0)); \ |
| 50 | } |
| 51 | #define SMC_RET3(_h, _x0, _x1, _x2) { \ |
| 52 | write_ctx_reg(get_gpregs_ctx(_h), CTX_GPREG_X2, (_x2)); \ |
| 53 | SMC_RET2(_h, (_x0), (_x1)); \ |
| 54 | } |
| 55 | #define SMC_RET4(_h, _x0, _x1, _x2, _x3) { \ |
| 56 | write_ctx_reg(get_gpregs_ctx(_h), CTX_GPREG_X3, (_x3)); \ |
| 57 | SMC_RET3(_h, (_x0), (_x1), (_x2)); \ |
| 58 | } |
| 59 | |
| 60 | /* |
| 61 | * Convenience macros to access general purpose registers using handle provided |
| 62 | * to SMC handler. These take the offset values defined in context.h |
| 63 | */ |
| 64 | #define SMC_GET_GP(_h, _g) \ |
| 65 | read_ctx_reg(get_gpregs_ctx(_h), (_g)) |
| 66 | #define SMC_SET_GP(_h, _g, _v) \ |
| 67 | write_ctx_reg(get_gpregs_ctx(_h), (_g), (_v)) |
| 68 | |
| 69 | /* |
| 70 | * Convenience macros to access EL3 context registers using handle provided to |
| 71 | * SMC handler. These take the offset values defined in context.h |
| 72 | */ |
| 73 | #define SMC_GET_EL3(_h, _e) \ |
| 74 | read_ctx_reg(get_el3state_ctx(_h), (_e)) |
| 75 | #define SMC_SET_EL3(_h, _e, _v) \ |
| 76 | write_ctx_reg(get_el3state_ctx(_h), (_e), (_v)) |
| 77 | |
| 78 | /* Return a UUID in the SMC return registers */ |
| 79 | #define SMC_UUID_RET(_h, _uuid) \ |
| 80 | SMC_RET4(handle, ((const uint32_t *) &(_uuid))[0], \ |
| 81 | ((const uint32_t *) &(_uuid))[1], \ |
| 82 | ((const uint32_t *) &(_uuid))[2], \ |
| 83 | ((const uint32_t *) &(_uuid))[3]) |
| 84 | |
| 85 | #endif /*__ASSEMBLY__*/ |
| 86 | #endif /* __SMCC_HELPERS_H__ */ |