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88 lines
2.7 KiB
88 lines
2.7 KiB
/*
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* Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef SMCCC_HELPERS_H
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#define SMCCC_HELPERS_H
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#include <lib/smccc.h>
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#ifndef __ASSEMBLER__
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#include <stdbool.h>
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#include <context.h>
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/* Convenience macros to return from SMC handler */
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#define SMC_RET0(_h) { \
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return (uint64_t) (_h); \
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}
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#define SMC_RET1(_h, _x0) { \
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write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X0), (_x0)); \
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SMC_RET0(_h); \
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}
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#define SMC_RET2(_h, _x0, _x1) { \
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write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X1), (_x1)); \
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SMC_RET1(_h, (_x0)); \
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}
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#define SMC_RET3(_h, _x0, _x1, _x2) { \
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write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X2), (_x2)); \
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SMC_RET2(_h, (_x0), (_x1)); \
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}
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#define SMC_RET4(_h, _x0, _x1, _x2, _x3) { \
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write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X3), (_x3)); \
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SMC_RET3(_h, (_x0), (_x1), (_x2)); \
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}
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#define SMC_RET5(_h, _x0, _x1, _x2, _x3, _x4) { \
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write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X4), (_x4)); \
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SMC_RET4(_h, (_x0), (_x1), (_x2), (_x3)); \
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}
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#define SMC_RET6(_h, _x0, _x1, _x2, _x3, _x4, _x5) { \
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write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X5), (_x5)); \
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SMC_RET5(_h, (_x0), (_x1), (_x2), (_x3), (_x4)); \
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}
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#define SMC_RET7(_h, _x0, _x1, _x2, _x3, _x4, _x5, _x6) { \
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write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X6), (_x6)); \
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SMC_RET6(_h, (_x0), (_x1), (_x2), (_x3), (_x4), (_x5)); \
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}
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#define SMC_RET8(_h, _x0, _x1, _x2, _x3, _x4, _x5, _x6, _x7) { \
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write_ctx_reg((get_gpregs_ctx(_h)), (CTX_GPREG_X7), (_x7)); \
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SMC_RET7(_h, (_x0), (_x1), (_x2), (_x3), (_x4), (_x5), (_x6)); \
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}
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/*
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* Convenience macros to access general purpose registers using handle provided
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* to SMC handler. These take the offset values defined in context.h
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*/
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#define SMC_GET_GP(_h, _g) \
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read_ctx_reg((get_gpregs_ctx(_h)), (_g))
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#define SMC_SET_GP(_h, _g, _v) \
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write_ctx_reg((get_gpregs_ctx(_h)), (_g), (_v))
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/*
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* Convenience macros to access EL3 context registers using handle provided to
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* SMC handler. These take the offset values defined in context.h
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*/
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#define SMC_GET_EL3(_h, _e) \
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read_ctx_reg((get_el3state_ctx(_h)), (_e))
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#define SMC_SET_EL3(_h, _e, _v) \
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write_ctx_reg((get_el3state_ctx(_h)), (_e), (_v))
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/*
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* Helper macro to retrieve the SMC parameters from cpu_context_t.
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*/
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#define get_smc_params_from_ctx(_hdl, _x1, _x2, _x3, _x4) \
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do { \
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const gp_regs_t *regs = get_gpregs_ctx(_hdl); \
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_x1 = read_ctx_reg(regs, CTX_GPREG_X1); \
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_x2 = read_ctx_reg(regs, CTX_GPREG_X2); \
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_x3 = read_ctx_reg(regs, CTX_GPREG_X3); \
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_x4 = read_ctx_reg(regs, CTX_GPREG_X4); \
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} while (false)
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#endif /*__ASSEMBLER__*/
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#endif /* SMCCC_HELPERS_H */
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