/* * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of ARM nor the names of its contributors may be used * to endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef __TLKD_PRIVATE_H__ #define __TLKD_PRIVATE_H__ #include #include #include #include #include /* * This flag is used by the TLKD to determine if the SP is servicing a standard * SMC request prior to programming the next entry into the SP e.g. if SP * execution is preempted by a non-secure interrupt and handed control to the * normal world. If another request which is distinct from what the SP was * previously doing arrives, then this flag will be help the TLKD to either * reject the new request or service it while ensuring that the previous context * is not corrupted. */ #define STD_SMC_ACTIVE_FLAG_SHIFT 2 #define STD_SMC_ACTIVE_FLAG_MASK 1 #define get_std_smc_active_flag(state) (((state) >> STD_SMC_ACTIVE_FLAG_SHIFT) \ & STD_SMC_ACTIVE_FLAG_MASK) #define set_std_smc_active_flag(state) ((state) |= \ (1 << STD_SMC_ACTIVE_FLAG_SHIFT)) #define clr_std_smc_active_flag(state) ((state) &= \ ~(STD_SMC_ACTIVE_FLAG_MASK \ << STD_SMC_ACTIVE_FLAG_SHIFT)) /******************************************************************************* * Translate virtual address received from the NS world ******************************************************************************/ #define TLK_TRANSLATE_NS_VADDR 4 /******************************************************************************* * Secure Payload execution state information i.e. aarch32 or aarch64 ******************************************************************************/ #define SP_AARCH32 MODE_RW_32 #define SP_AARCH64 MODE_RW_64 /******************************************************************************* * Number of cpus that the present on this platform. TODO: Rely on a topology * tree to determine this in the future to avoid assumptions about mpidr * allocation ******************************************************************************/ #define TLKD_CORE_COUNT PLATFORM_CORE_COUNT /******************************************************************************* * Constants that allow assembler code to preserve callee-saved registers of the * C runtime context while performing a security state switch. ******************************************************************************/ #define TLKD_C_RT_CTX_X19 0x0 #define TLKD_C_RT_CTX_X20 0x8 #define TLKD_C_RT_CTX_X21 0x10 #define TLKD_C_RT_CTX_X22 0x18 #define TLKD_C_RT_CTX_X23 0x20 #define TLKD_C_RT_CTX_X24 0x28 #define TLKD_C_RT_CTX_X25 0x30 #define TLKD_C_RT_CTX_X26 0x38 #define TLKD_C_RT_CTX_X27 0x40 #define TLKD_C_RT_CTX_X28 0x48 #define TLKD_C_RT_CTX_X29 0x50 #define TLKD_C_RT_CTX_X30 0x58 #define TLKD_C_RT_CTX_SIZE 0x60 #define TLKD_C_RT_CTX_ENTRIES (TLKD_C_RT_CTX_SIZE >> DWORD_SHIFT) #ifndef __ASSEMBLY__ #include #include /* AArch64 callee saved general purpose register context structure. */ DEFINE_REG_STRUCT(c_rt_regs, TLKD_C_RT_CTX_ENTRIES); /* * Compile time assertion to ensure that both the compiler and linker * have the same double word aligned view of the size of the C runtime * register context. */ CASSERT(TLKD_C_RT_CTX_SIZE == sizeof(c_rt_regs_t), \ assert_tlkd_c_rt_regs_size_mismatch); /******************************************************************************* * Structure which helps the SPD to maintain the per-cpu state of the SP. * 'state' - collection of flags to track SP state e.g. on/off * 'mpidr' - mpidr to associate a context with a cpu * 'c_rt_ctx' - stack address to restore C runtime context from after * returning from a synchronous entry into the SP. * 'cpu_ctx' - space to maintain SP architectural state * 'saved_tsp_args' - space to store arguments for TSP arithmetic operations * which will queried using the TSP_GET_ARGS SMC by TSP. ******************************************************************************/ typedef struct tlk_context { uint32_t state; uint64_t mpidr; uint64_t c_rt_ctx; cpu_context_t cpu_ctx; } tlk_context_t; /******************************************************************************* * Function & Data prototypes ******************************************************************************/ uint64_t tlkd_va_translate(uintptr_t va, int type); uint64_t tlkd_enter_sp(uint64_t *c_rt_ctx); void __dead2 tlkd_exit_sp(uint64_t c_rt_ctx, uint64_t ret); uint64_t tlkd_synchronous_sp_entry(tlk_context_t *tlk_ctx); void __dead2 tlkd_synchronous_sp_exit(tlk_context_t *tlk_ctx, uint64_t ret); void tlkd_init_tlk_ep_state(struct entry_point_info *tlk_entry_point, uint32_t rw, uint64_t pc, tlk_context_t *tlk_ctx); #endif /*__ASSEMBLY__*/ #endif /* __TLKD_PRIVATE_H__ */