177c27753SZelalem Aweke /* 2319fb084SSoby Mathew * Copyright (c) 2021-2022, ARM Limited and Contributors. All rights reserved. 377c27753SZelalem Aweke * 477c27753SZelalem Aweke * SPDX-License-Identifier: BSD-3-Clause 577c27753SZelalem Aweke */ 677c27753SZelalem Aweke 777c27753SZelalem Aweke #ifndef RMMD_PRIVATE_H 877c27753SZelalem Aweke #define RMMD_PRIVATE_H 977c27753SZelalem Aweke 1077c27753SZelalem Aweke #include <context.h> 1177c27753SZelalem Aweke 1277c27753SZelalem Aweke /******************************************************************************* 1377c27753SZelalem Aweke * Constants that allow assembler code to preserve callee-saved registers of the 1477c27753SZelalem Aweke * C runtime context while performing a security state switch. 1577c27753SZelalem Aweke ******************************************************************************/ 1677c27753SZelalem Aweke #define RMMD_C_RT_CTX_X19 0x0 1777c27753SZelalem Aweke #define RMMD_C_RT_CTX_X20 0x8 1877c27753SZelalem Aweke #define RMMD_C_RT_CTX_X21 0x10 1977c27753SZelalem Aweke #define RMMD_C_RT_CTX_X22 0x18 2077c27753SZelalem Aweke #define RMMD_C_RT_CTX_X23 0x20 2177c27753SZelalem Aweke #define RMMD_C_RT_CTX_X24 0x28 2277c27753SZelalem Aweke #define RMMD_C_RT_CTX_X25 0x30 2377c27753SZelalem Aweke #define RMMD_C_RT_CTX_X26 0x38 2477c27753SZelalem Aweke #define RMMD_C_RT_CTX_X27 0x40 2577c27753SZelalem Aweke #define RMMD_C_RT_CTX_X28 0x48 2677c27753SZelalem Aweke #define RMMD_C_RT_CTX_X29 0x50 2777c27753SZelalem Aweke #define RMMD_C_RT_CTX_X30 0x58 2877c27753SZelalem Aweke 2977c27753SZelalem Aweke #define RMMD_C_RT_CTX_SIZE 0x60 3077c27753SZelalem Aweke #define RMMD_C_RT_CTX_ENTRIES (RMMD_C_RT_CTX_SIZE >> DWORD_SHIFT) 3177c27753SZelalem Aweke 3277c27753SZelalem Aweke #ifndef __ASSEMBLER__ 3377c27753SZelalem Aweke #include <stdint.h> 3477c27753SZelalem Aweke 3577c27753SZelalem Aweke typedef enum rmm_state { 3677c27753SZelalem Aweke RMM_STATE_RESET = 0, 3777c27753SZelalem Aweke RMM_STATE_IDLE 3877c27753SZelalem Aweke } rmm_state_t; 3977c27753SZelalem Aweke 4077c27753SZelalem Aweke /* 4177c27753SZelalem Aweke * Data structure used by the RMM dispatcher (RMMD) in EL3 to track context of 4277c27753SZelalem Aweke * the RMM at R-EL2. 4377c27753SZelalem Aweke */ 4477c27753SZelalem Aweke typedef struct rmmd_rmm_context { 4577c27753SZelalem Aweke uint64_t c_rt_ctx; 4677c27753SZelalem Aweke cpu_context_t cpu_ctx; 4777c27753SZelalem Aweke rmm_state_t state; 4877c27753SZelalem Aweke } rmmd_rmm_context_t; 4977c27753SZelalem Aweke 5077c27753SZelalem Aweke /* Functions used to enter/exit the RMM synchronously */ 5177c27753SZelalem Aweke uint64_t rmmd_rmm_sync_entry(rmmd_rmm_context_t *ctx); 5277c27753SZelalem Aweke __dead2 void rmmd_rmm_sync_exit(uint64_t rc); 5377c27753SZelalem Aweke 54*0f9159b7SSoby Mathew /* Functions implementing attestation utilities for RMM */ 55*0f9159b7SSoby Mathew int rmmd_attest_get_platform_token(uint64_t buf_pa, uint64_t *buf_len, 56*0f9159b7SSoby Mathew uint64_t challenge_hash_len); 57*0f9159b7SSoby Mathew 5877c27753SZelalem Aweke /* Assembly helpers */ 5977c27753SZelalem Aweke uint64_t rmmd_rmm_enter(uint64_t *c_rt_ctx); 6077c27753SZelalem Aweke void __dead2 rmmd_rmm_exit(uint64_t c_rt_ctx, uint64_t ret); 6177c27753SZelalem Aweke 6277c27753SZelalem Aweke /* Reference to PM ops for the RMMD */ 6377c27753SZelalem Aweke extern const spd_pm_ops_t rmmd_pm; 6477c27753SZelalem Aweke 6577c27753SZelalem Aweke #endif /* __ASSEMBLER__ */ 6677c27753SZelalem Aweke 6777c27753SZelalem Aweke #endif /* RMMD_PRIVATE_H */ 68