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 36 /* 37 * Convert a function no. in a FID to a bit position. All function nos. are 38 * between 0 and 0x1f 39 */ 40 #define SPCI_FNO_TO_BIT_POS(_fid) (1 << ((_fid) & U(0x1f))) 41 42 typedef enum spmc_state { 43 SPMC_STATE_RESET = 0, 44 SPMC_STATE_IDLE 45 } spmc_state_t; 46 47 /* 48 * Data structure used by the SPM dispatcher (SPMD) in EL3 to track context of 49 * the SPM core (SPMC) at the next lower EL. 50 */ 51 typedef struct spmd_spm_core_context { 52 uint64_t c_rt_ctx; 53 cpu_context_t cpu_ctx; 54 spmc_state_t state; 55 } spmd_spm_core_context_t; 56 57 /* 58 * Data structure used by the SPM dispatcher (SPMD) in EL3 to track sequence of 59 * SPCI calls from lower ELs. 60 * 61 * next_smc_bit_map: Per-cpu bit map of SMCs from each world that are expected 62 * next. 63 */ 64 typedef struct spmd_spci_context { 65 uint32_t next_smc_bit_map[2]; 66 } spmd_spci_context_t; 67 68 /* Functions used to enter/exit a Secure Partition synchronously */ 69 uint64_t spmd_spm_core_sync_entry(spmd_spm_core_context_t *ctx); 70 __dead2 void spmd_spm_core_sync_exit(uint64_t rc); 71 72 /* Assembly helpers */ 73 uint64_t spmd_spm_core_enter(uint64_t *c_rt_ctx); 74 void __dead2 spmd_spm_core_exit(uint64_t c_rt_ctx, uint64_t ret); 75 76 #endif /* __ASSEMBLER__ */ 77 78 #endif /* SPMD_PRIVATE_H */ 79