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Diffstat (limited to 'services/spd/tlkd/tlkd_private.h')
| -rw-r--r-- | services/spd/tlkd/tlkd_private.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/services/spd/tlkd/tlkd_private.h b/services/spd/tlkd/tlkd_private.h new file mode 100644 index 0000000..5d5d0e8 --- /dev/null +++ b/services/spd/tlkd/tlkd_private.h @@ -0,0 +1,124 @@ +/* + * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef TLKD_PRIVATE_H +#define TLKD_PRIVATE_H + +#include <platform_def.h> + +#include <arch.h> +#include <bl31/interrupt_mgmt.h> +#include <context.h> +#include <lib/psci/psci.h> + +/* + * This flag is used by the TLKD to determine if the SP is servicing a yielding + * 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 YIELD_SMC_ACTIVE_FLAG_SHIFT 2 +#define YIELD_SMC_ACTIVE_FLAG_MASK 1 +#define get_yield_smc_active_flag(state) \ + (((state) >> YIELD_SMC_ACTIVE_FLAG_SHIFT) \ + & YIELD_SMC_ACTIVE_FLAG_MASK) +#define set_yield_smc_active_flag(state) ((state) |= \ + (1 << YIELD_SMC_ACTIVE_FLAG_SHIFT)) +#define clr_yield_smc_active_flag(state) ((state) &= \ + ~(YIELD_SMC_ACTIVE_FLAG_MASK \ + << YIELD_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 __ASSEMBLER__ + +#include <stdint.h> + +#include <lib/cassert.h> + +/* 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 /*__ASSEMBLER__*/ + +#endif /* TLKD_PRIVATE_H */ |