Achin Gupta | 86f2353 | 2019-10-11 15:41:16 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2019-2020, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #ifndef SPMD_PRIVATE_H |
| 8 | #define SPMD_PRIVATE_H |
| 9 | |
| 10 | #include <context.h> |
| 11 | |
| 12 | /******************************************************************************* |
| 13 | * Constants that allow assembler code to preserve callee-saved registers of the |
| 14 | * C runtime context while performing a security state switch. |
| 15 | ******************************************************************************/ |
| 16 | #define SPMD_C_RT_CTX_X19 0x0 |
| 17 | #define SPMD_C_RT_CTX_X20 0x8 |
| 18 | #define SPMD_C_RT_CTX_X21 0x10 |
| 19 | #define SPMD_C_RT_CTX_X22 0x18 |
| 20 | #define SPMD_C_RT_CTX_X23 0x20 |
| 21 | #define SPMD_C_RT_CTX_X24 0x28 |
| 22 | #define SPMD_C_RT_CTX_X25 0x30 |
| 23 | #define SPMD_C_RT_CTX_X26 0x38 |
| 24 | #define SPMD_C_RT_CTX_X27 0x40 |
| 25 | #define SPMD_C_RT_CTX_X28 0x48 |
| 26 | #define SPMD_C_RT_CTX_X29 0x50 |
| 27 | #define SPMD_C_RT_CTX_X30 0x58 |
| 28 | |
| 29 | #define SPMD_C_RT_CTX_SIZE 0x60 |
| 30 | #define SPMD_C_RT_CTX_ENTRIES (SPMD_C_RT_CTX_SIZE >> DWORD_SHIFT) |
| 31 | |
| 32 | #ifndef __ASSEMBLER__ |
| 33 | #include <services/spci_svc.h> |
| 34 | #include <stdint.h> |
| 35 | |
Achin Gupta | 86f2353 | 2019-10-11 15:41:16 +0100 | [diff] [blame] | 36 | typedef enum spmc_state { |
| 37 | SPMC_STATE_RESET = 0, |
| 38 | SPMC_STATE_IDLE |
| 39 | } spmc_state_t; |
| 40 | |
| 41 | /* |
| 42 | * Data structure used by the SPM dispatcher (SPMD) in EL3 to track context of |
| 43 | * the SPM core (SPMC) at the next lower EL. |
| 44 | */ |
| 45 | typedef struct spmd_spm_core_context { |
| 46 | uint64_t c_rt_ctx; |
| 47 | cpu_context_t cpu_ctx; |
| 48 | spmc_state_t state; |
| 49 | } spmd_spm_core_context_t; |
| 50 | |
| 51 | /* |
Max Shvetsov | e79062e | 2020-03-12 15:16:40 +0000 | [diff] [blame] | 52 | * Reserve ID for NS physical SPCI Endpoint. |
| 53 | */ |
| 54 | #define SPCI_NS_ENDPOINT_ID U(0) |
| 55 | |
| 56 | /* Mask and shift to check valid secure SPCI Endpoint ID. */ |
Olivier Deprez | 2bae35f | 2020-04-16 13:39:06 +0200 | [diff] [blame] | 57 | #define SPMC_SECURE_ID_MASK U(1) |
| 58 | #define SPMC_SECURE_ID_SHIFT U(15) |
Max Shvetsov | e79062e | 2020-03-12 15:16:40 +0000 | [diff] [blame] | 59 | |
Olivier Deprez | 2bae35f | 2020-04-16 13:39:06 +0200 | [diff] [blame] | 60 | /* Functions used to enter/exit SPMC synchronously */ |
Achin Gupta | 86f2353 | 2019-10-11 15:41:16 +0100 | [diff] [blame] | 61 | uint64_t spmd_spm_core_sync_entry(spmd_spm_core_context_t *ctx); |
| 62 | __dead2 void spmd_spm_core_sync_exit(uint64_t rc); |
| 63 | |
| 64 | /* Assembly helpers */ |
| 65 | uint64_t spmd_spm_core_enter(uint64_t *c_rt_ctx); |
| 66 | void __dead2 spmd_spm_core_exit(uint64_t c_rt_ctx, uint64_t ret); |
| 67 | |
Olivier Deprez | 2bae35f | 2020-04-16 13:39:06 +0200 | [diff] [blame] | 68 | /* SPMC context on current CPU get helper */ |
| 69 | spmd_spm_core_context_t *spmd_get_context(void); |
| 70 | |
Achin Gupta | 86f2353 | 2019-10-11 15:41:16 +0100 | [diff] [blame] | 71 | #endif /* __ASSEMBLER__ */ |
| 72 | |
| 73 | #endif /* SPMD_PRIVATE_H */ |