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