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77c2775323
This patch introduces the RMM dispatcher into BL31. This will be the mechanism that will enable communication to take place between the Realm and non-secure world. Currently gives the capability for granules to be transitioned from non-secure type to realm and vice versa. Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com> Signed-off-by: Subhasish Ghosh <subhasish.ghosh@arm.com> Change-Id: I1fdc99a4bdd42bc14911aa0c6954b131de309511
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/*
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* Copyright (c) 2021, 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 RMMD_PRIVATE_H
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#define RMMD_PRIVATE_H
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#include <context.h>
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/*******************************************************************************
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* Constants that allow assembler code to preserve callee-saved registers of the
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* C runtime context while performing a security state switch.
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******************************************************************************/
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#define RMMD_C_RT_CTX_X19 0x0
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#define RMMD_C_RT_CTX_X20 0x8
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#define RMMD_C_RT_CTX_X21 0x10
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#define RMMD_C_RT_CTX_X22 0x18
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#define RMMD_C_RT_CTX_X23 0x20
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#define RMMD_C_RT_CTX_X24 0x28
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#define RMMD_C_RT_CTX_X25 0x30
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#define RMMD_C_RT_CTX_X26 0x38
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#define RMMD_C_RT_CTX_X27 0x40
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#define RMMD_C_RT_CTX_X28 0x48
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#define RMMD_C_RT_CTX_X29 0x50
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#define RMMD_C_RT_CTX_X30 0x58
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#define RMMD_C_RT_CTX_SIZE 0x60
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#define RMMD_C_RT_CTX_ENTRIES (RMMD_C_RT_CTX_SIZE >> DWORD_SHIFT)
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#ifndef __ASSEMBLER__
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#include <stdint.h>
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#include <services/rmi_svc.h>
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typedef enum rmm_state {
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RMM_STATE_RESET = 0,
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RMM_STATE_IDLE
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} rmm_state_t;
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/*
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* Data structure used by the RMM dispatcher (RMMD) in EL3 to track context of
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* the RMM at R-EL2.
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*/
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typedef struct rmmd_rmm_context {
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uint64_t c_rt_ctx;
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cpu_context_t cpu_ctx;
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rmm_state_t state;
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} rmmd_rmm_context_t;
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/* Functions used to enter/exit the RMM synchronously */
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uint64_t rmmd_rmm_sync_entry(rmmd_rmm_context_t *ctx);
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__dead2 void rmmd_rmm_sync_exit(uint64_t rc);
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/* Assembly helpers */
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uint64_t rmmd_rmm_enter(uint64_t *c_rt_ctx);
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void __dead2 rmmd_rmm_exit(uint64_t c_rt_ctx, uint64_t ret);
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/* Reference to PM ops for the RMMD */
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extern const spd_pm_ops_t rmmd_pm;
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#endif /* __ASSEMBLER__ */
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#endif /* RMMD_PRIVATE_H */
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