115 lines
4.3 KiB
C
115 lines
4.3 KiB
C
/*
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* Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __SMCC_HELPERS_H__
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#define __SMCC_HELPERS_H__
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#include <smcc.h>
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#ifndef __ASSEMBLY__
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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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/* Return a UUID in the SMC return registers */
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#define SMC_UUID_RET(_h, _uuid) \
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SMC_RET4(handle, ((const uint32_t *) &(_uuid))[0], \
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((const uint32_t *) &(_uuid))[1], \
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((const uint32_t *) &(_uuid))[2], \
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((const uint32_t *) &(_uuid))[3])
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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 (0)
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#endif /*__ASSEMBLY__*/
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#endif /* __SMCC_HELPERS_H__ */
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