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Antonio Nino Diaz3c817f42018-03-21 10:49:27 +00001/*
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 <smccc.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
Antonio Nino Diaz3c817f42018-03-21 10:49:27 +000070/*
71 * Helper macro to retrieve the SMC parameters from cpu_context_t.
72 */
73#define get_smc_params_from_ctx(_hdl, _x1, _x2, _x3, _x4) \
74 do { \
75 const gp_regs_t *regs = get_gpregs_ctx(_hdl); \
76 _x1 = read_ctx_reg(regs, CTX_GPREG_X1); \
77 _x2 = read_ctx_reg(regs, CTX_GPREG_X2); \
78 _x3 = read_ctx_reg(regs, CTX_GPREG_X3); \
79 _x4 = read_ctx_reg(regs, CTX_GPREG_X4); \
80 } while (0)
81
82#endif /*__ASSEMBLY__*/
83
84#endif /* __SMCCC_HELPERS_H__ */