1 /* 2 * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef SMCCC_HELPERS_H 8 #define SMCCC_HELPERS_H 9 10 #include <lib/smccc.h> 11 12 #ifndef __ASSEMBLER__ 13 14 #include <stdbool.h> 15 16 #include <context.h> 17 18 /* Convenience macros to return from SMC handler */ 19 #define SMC_RET0(_h) { \ 20 return (uint64_t) (_h); \ 21 } 22 #define SMC_RET1(_h, _x0) { \ 23 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X0), (_x0)); \ 24 SMC_RET0(_h); \ 25 } 26 #define SMC_RET2(_h, _x0, _x1) { \ 27 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X1), (_x1)); \ 28 SMC_RET1(_h, (_x0)); \ 29 } 30 #define SMC_RET3(_h, _x0, _x1, _x2) { \ 31 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X2), (_x2)); \ 32 SMC_RET2(_h, (_x0), (_x1)); \ 33 } 34 #define SMC_RET4(_h, _x0, _x1, _x2, _x3) { \ 35 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X3), (_x3)); \ 36 SMC_RET3(_h, (_x0), (_x1), (_x2)); \ 37 } 38 #define SMC_RET5(_h, _x0, _x1, _x2, _x3, _x4) { \ 39 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X4), (_x4)); \ 40 SMC_RET4(_h, (_x0), (_x1), (_x2), (_x3)); \ 41 } 42 #define SMC_RET6(_h, _x0, _x1, _x2, _x3, _x4, _x5) { \ 43 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X5), (_x5)); \ 44 SMC_RET5(_h, (_x0), (_x1), (_x2), (_x3), (_x4)); \ 45 } 46 #define SMC_RET7(_h, _x0, _x1, _x2, _x3, _x4, _x5, _x6) { \ 47 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X6), (_x6)); \ 48 SMC_RET6(_h, (_x0), (_x1), (_x2), (_x3), (_x4), (_x5)); \ 49 } 50 #define SMC_RET8(_h, _x0, _x1, _x2, _x3, _x4, _x5, _x6, _x7) { \ 51 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X7), (_x7)); \ 52 SMC_RET7(_h, (_x0), (_x1), (_x2), (_x3), (_x4), (_x5), (_x6)); \ 53 } 54 55 /* 56 * Convenience macros to access general purpose registers using handle provided 57 * to SMC handler. These take the offset values defined in context.h 58 */ 59 #define SMC_GET_GP(_h, _g) \ 60 read_ctx_reg((get_gpregs_ctx(_h)), (_g)) 61 #define SMC_SET_GP(_h, _g, _v) \ 62 write_ctx_reg((get_gpregs_ctx(_h)), (_g), (_v)) 63 64 /* 65 * Convenience macros to access EL3 context registers using handle provided to 66 * SMC handler. These take the offset values defined in context.h 67 */ 68 #define SMC_GET_EL3(_h, _e) \ 69 read_ctx_reg((get_el3state_ctx(_h)), (_e)) 70 #define SMC_SET_EL3(_h, _e, _v) \ 71 write_ctx_reg((get_el3state_ctx(_h)), (_e), (_v)) 72 73 /* 74 * Helper macro to retrieve the SMC parameters from cpu_context_t. 75 */ 76 #define get_smc_params_from_ctx(_hdl, _x1, _x2, _x3, _x4) \ 77 do { \ 78 const gp_regs_t *regs = get_gpregs_ctx(_hdl); \ 79 _x1 = read_ctx_reg(regs, CTX_GPREG_X1); \ 80 _x2 = read_ctx_reg(regs, CTX_GPREG_X2); \ 81 _x3 = read_ctx_reg(regs, CTX_GPREG_X3); \ 82 _x4 = read_ctx_reg(regs, CTX_GPREG_X4); \ 83 } while (false) 84 85 #endif /*__ASSEMBLER__*/ 86 87 #endif /* SMCCC_HELPERS_H */ 88