diff options
Diffstat (limited to '')
| -rw-r--r-- | services/spd/opteed/opteed_private.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/services/spd/opteed/opteed_private.h b/services/spd/opteed/opteed_private.h new file mode 100644 index 0000000..242154f --- /dev/null +++ b/services/spd/opteed/opteed_private.h @@ -0,0 +1,162 @@ +/* + * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef OPTEED_PRIVATE_H +#define OPTEED_PRIVATE_H + +#include <platform_def.h> + +#include <arch.h> +#include <bl31/interrupt_mgmt.h> +#include <context.h> +#include <lib/psci/psci.h> + +/******************************************************************************* + * OPTEE PM state information e.g. OPTEE is suspended, uninitialised etc + * and macros to access the state information in the per-cpu 'state' flags + ******************************************************************************/ +#define OPTEE_PSTATE_OFF 0 +#define OPTEE_PSTATE_ON 1 +#define OPTEE_PSTATE_SUSPEND 2 +#define OPTEE_PSTATE_SHIFT 0 +#define OPTEE_PSTATE_MASK 0x3 +#define get_optee_pstate(state) ((state >> OPTEE_PSTATE_SHIFT) & \ + OPTEE_PSTATE_MASK) +#define clr_optee_pstate(state) (state &= ~(OPTEE_PSTATE_MASK \ + << OPTEE_PSTATE_SHIFT)) +#define set_optee_pstate(st, pst) do { \ + clr_optee_pstate(st); \ + st |= (pst & OPTEE_PSTATE_MASK) << \ + OPTEE_PSTATE_SHIFT; \ + } while (0) + + +/******************************************************************************* + * OPTEE execution state information i.e. aarch32 or aarch64 + ******************************************************************************/ +#define OPTEE_AARCH32 MODE_RW_32 +#define OPTEE_AARCH64 MODE_RW_64 + +/******************************************************************************* + * The OPTEED should know the type of OPTEE + ******************************************************************************/ +#define OPTEE_TYPE_UP PSCI_TOS_NOT_UP_MIG_CAP +#define OPTEE_TYPE_UPM PSCI_TOS_UP_MIG_CAP +#define OPTEE_TYPE_MP PSCI_TOS_NOT_PRESENT_MP + +/******************************************************************************* + * OPTEE migrate type information as known to the OPTEED. We assume that + * the OPTEED is dealing with an MP Secure Payload. + ******************************************************************************/ +#define OPTEE_MIGRATE_INFO OPTEE_TYPE_MP + +/******************************************************************************* + * 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 OPTEED_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 OPTEED_C_RT_CTX_X19 0x0 +#define OPTEED_C_RT_CTX_X20 0x8 +#define OPTEED_C_RT_CTX_X21 0x10 +#define OPTEED_C_RT_CTX_X22 0x18 +#define OPTEED_C_RT_CTX_X23 0x20 +#define OPTEED_C_RT_CTX_X24 0x28 +#define OPTEED_C_RT_CTX_X25 0x30 +#define OPTEED_C_RT_CTX_X26 0x38 +#define OPTEED_C_RT_CTX_X27 0x40 +#define OPTEED_C_RT_CTX_X28 0x48 +#define OPTEED_C_RT_CTX_X29 0x50 +#define OPTEED_C_RT_CTX_X30 0x58 +#define OPTEED_C_RT_CTX_SIZE 0x60 +#define OPTEED_C_RT_CTX_ENTRIES (OPTEED_C_RT_CTX_SIZE >> DWORD_SHIFT) + +#ifndef __ASSEMBLER__ + +#include <stdint.h> + +#include <lib/cassert.h> + +typedef uint32_t optee_vector_isn_t; + +typedef struct optee_vectors { + optee_vector_isn_t yield_smc_entry; + optee_vector_isn_t fast_smc_entry; + optee_vector_isn_t cpu_on_entry; + optee_vector_isn_t cpu_off_entry; + optee_vector_isn_t cpu_resume_entry; + optee_vector_isn_t cpu_suspend_entry; + optee_vector_isn_t fiq_entry; + optee_vector_isn_t system_off_entry; + optee_vector_isn_t system_reset_entry; +} optee_vectors_t; + +/* + * The number of arguments to save during a SMC call for OPTEE. + * Currently only x1 and x2 are used by OPTEE. + */ +#define OPTEE_NUM_ARGS 0x2 + +/* AArch64 callee saved general purpose register context structure. */ +DEFINE_REG_STRUCT(c_rt_regs, OPTEED_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(OPTEED_C_RT_CTX_SIZE == sizeof(c_rt_regs_t), \ + assert_spd_c_rt_regs_size_mismatch); + +/******************************************************************************* + * Structure which helps the OPTEED to maintain the per-cpu state of OPTEE. + * 'state' - collection of flags to track OPTEE 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 OPTEE. + * 'cpu_ctx' - space to maintain OPTEE architectural state + ******************************************************************************/ +typedef struct optee_context { + uint32_t state; + uint64_t mpidr; + uint64_t c_rt_ctx; + cpu_context_t cpu_ctx; +} optee_context_t; + +/* OPTEED power management handlers */ +extern const spd_pm_ops_t opteed_pm; + +/******************************************************************************* + * Forward declarations + ******************************************************************************/ +struct optee_vectors; + +/******************************************************************************* + * Function & Data prototypes + ******************************************************************************/ +uint64_t opteed_enter_sp(uint64_t *c_rt_ctx); +void __dead2 opteed_exit_sp(uint64_t c_rt_ctx, uint64_t ret); +uint64_t opteed_synchronous_sp_entry(optee_context_t *optee_ctx); +void __dead2 opteed_synchronous_sp_exit(optee_context_t *optee_ctx, uint64_t ret); +void opteed_init_optee_ep_state(struct entry_point_info *optee_entry_point, + uint32_t rw, + uint64_t pc, + uint64_t pageable_part, + uint64_t mem_limit, + uint64_t dt_addr, + optee_context_t *optee_ctx); + +extern optee_context_t opteed_sp_context[OPTEED_CORE_COUNT]; +extern uint32_t opteed_rw; +extern struct optee_vectors *optee_vector_table; +#endif /*__ASSEMBLER__*/ + +#endif /* OPTEED_PRIVATE_H */ |