1 /* 2 * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef __SMCC_HELPERS_H__ 8 #define __SMCC_HELPERS_H__ 9 10 #include <smcc.h> 11 12 #ifndef __ASSEMBLY__ 13 #include <context.h> 14 15 /* Convenience macros to return from SMC handler */ 16 #define SMC_RET0(_h) { \ 17 return (uint64_t) (_h); \ 18 } 19 #define SMC_RET1(_h, _x0) { \ 20 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X0), (_x0)); \ 21 SMC_RET0(_h); \ 22 } 23 #define SMC_RET2(_h, _x0, _x1) { \ 24 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X1), (_x1)); \ 25 SMC_RET1(_h, (_x0)); \ 26 } 27 #define SMC_RET3(_h, _x0, _x1, _x2) { \ 28 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X2), (_x2)); \ 29 SMC_RET2(_h, (_x0), (_x1)); \ 30 } 31 #define SMC_RET4(_h, _x0, _x1, _x2, _x3) { \ 32 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X3), (_x3)); \ 33 SMC_RET3(_h, (_x0), (_x1), (_x2)); \ 34 } 35 #define SMC_RET5(_h, _x0, _x1, _x2, _x3, _x4) { \ 36 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X4), (_x4)); \ 37 SMC_RET4(_h, (_x0), (_x1), (_x2), (_x3)); \ 38 } 39 #define SMC_RET6(_h, _x0, _x1, _x2, _x3, _x4, _x5) { \ 40 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X5), (_x5)); \ 41 SMC_RET5(_h, (_x0), (_x1), (_x2), (_x3), (_x4)); \ 42 } 43 #define SMC_RET7(_h, _x0, _x1, _x2, _x3, _x4, _x5, _x6) { \ 44 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X6), (_x6)); \ 45 SMC_RET6(_h, (_x0), (_x1), (_x2), (_x3), (_x4), (_x5)); \ 46 } 47 #define SMC_RET8(_h, _x0, _x1, _x2, _x3, _x4, _x5, _x6, _x7) { \ 48 write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X7), (_x7)); \ 49 SMC_RET7(_h, (_x0), (_x1), (_x2), (_x3), (_x4), (_x5), (_x6)); \ 50 } 51 52 /* 53 * Convenience macros to access general purpose registers using handle provided 54 * to SMC handler. These take the offset values defined in context.h 55 */ 56 #define SMC_GET_GP(_h, _g) \ 57 read_ctx_reg((get_gpregs_ctx(_h)), (_g)) 58 #define SMC_SET_GP(_h, _g, _v) \ 59 write_ctx_reg((get_gpregs_ctx(_h)), (_g), (_v)) 60 61 /* 62 * Convenience macros to access EL3 context registers using handle provided to 63 * SMC handler. These take the offset values defined in context.h 64 */ 65 #define SMC_GET_EL3(_h, _e) \ 66 read_ctx_reg((get_el3state_ctx(_h)), (_e)) 67 #define SMC_SET_EL3(_h, _e, _v) \ 68 write_ctx_reg((get_el3state_ctx(_h)), (_e), (_v)) 69 70 /* Return a UUID in the SMC return registers */ 71 #define SMC_UUID_RET(_h, _uuid) \ 72 SMC_RET4(handle, ((const uint32_t *) &(_uuid))[0], \ 73 ((const uint32_t *) &(_uuid))[1], \ 74 ((const uint32_t *) &(_uuid))[2], \ 75 ((const uint32_t *) &(_uuid))[3]) 76 77 /* 78 * Helper macro to retrieve the SMC parameters from cpu_context_t. 79 */ 80 #define get_smc_params_from_ctx(_hdl, _x1, _x2, _x3, _x4) \ 81 do { \ 82 const gp_regs_t *regs = get_gpregs_ctx(_hdl); \ 83 _x1 = read_ctx_reg(regs, CTX_GPREG_X1); \ 84 _x2 = read_ctx_reg(regs, CTX_GPREG_X2); \ 85 _x3 = read_ctx_reg(regs, CTX_GPREG_X3); \ 86 _x4 = read_ctx_reg(regs, CTX_GPREG_X4); \ 87 } while (0) 88 89 #endif /*__ASSEMBLY__*/ 90 #endif /* __SMCC_HELPERS_H__ */ 91