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Since Issue B (November 2016) of the SMC Calling Convention document standard SMC calls are renamed to yielding SMC calls to help avoid confusion with the standard service SMC range, which remains unchanged. http://infocenter.arm.com/help/topic/com.arm.doc.den0028b/ARM_DEN0028B_SMC_Calling_Convention.pd A previous patch introduced a new define for yielding SMC call type. This patch updates the secure payload dispatchers (except the TSPD) to use this new define and also migrates the code to use the new terminology. Change-Id: I3d2437c04e3b21fdbd32019f55c066c87679a5bf Signed-off-by: David Cunado <david.cunado@arm.com>
122 lines
4.8 KiB
C
122 lines
4.8 KiB
C
/*
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* Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __TLKD_PRIVATE_H__
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#define __TLKD_PRIVATE_H__
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#include <arch.h>
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#include <context.h>
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#include <interrupt_mgmt.h>
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#include <platform_def.h>
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#include <psci.h>
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/*
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* This flag is used by the TLKD to determine if the SP is servicing a yielding
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* SMC request prior to programming the next entry into the SP e.g. if SP
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* execution is preempted by a non-secure interrupt and handed control to the
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* normal world. If another request which is distinct from what the SP was
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* previously doing arrives, then this flag will be help the TLKD to either
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* reject the new request or service it while ensuring that the previous context
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* is not corrupted.
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*/
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#define YIELD_SMC_ACTIVE_FLAG_SHIFT 2
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#define YIELD_SMC_ACTIVE_FLAG_MASK 1
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#define get_yield_smc_active_flag(state) \
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(((state) >> YIELD_SMC_ACTIVE_FLAG_SHIFT) \
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& YIELD_SMC_ACTIVE_FLAG_MASK)
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#define set_yield_smc_active_flag(state) ((state) |= \
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(1 << YIELD_SMC_ACTIVE_FLAG_SHIFT))
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#define clr_yield_smc_active_flag(state) ((state) &= \
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~(YIELD_SMC_ACTIVE_FLAG_MASK \
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<< YIELD_SMC_ACTIVE_FLAG_SHIFT))
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/*******************************************************************************
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* Translate virtual address received from the NS world
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******************************************************************************/
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#define TLK_TRANSLATE_NS_VADDR 4
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/*******************************************************************************
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* Secure Payload execution state information i.e. aarch32 or aarch64
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******************************************************************************/
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#define SP_AARCH32 MODE_RW_32
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#define SP_AARCH64 MODE_RW_64
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/*******************************************************************************
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* Number of cpus that the present on this platform. TODO: Rely on a topology
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* tree to determine this in the future to avoid assumptions about mpidr
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* allocation
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******************************************************************************/
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#define TLKD_CORE_COUNT PLATFORM_CORE_COUNT
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/*******************************************************************************
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* Constants that allow assembler code to preserve callee-saved registers of the
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* C runtime context while performing a security state switch.
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******************************************************************************/
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#define TLKD_C_RT_CTX_X19 0x0
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#define TLKD_C_RT_CTX_X20 0x8
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#define TLKD_C_RT_CTX_X21 0x10
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#define TLKD_C_RT_CTX_X22 0x18
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#define TLKD_C_RT_CTX_X23 0x20
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#define TLKD_C_RT_CTX_X24 0x28
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#define TLKD_C_RT_CTX_X25 0x30
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#define TLKD_C_RT_CTX_X26 0x38
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#define TLKD_C_RT_CTX_X27 0x40
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#define TLKD_C_RT_CTX_X28 0x48
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#define TLKD_C_RT_CTX_X29 0x50
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#define TLKD_C_RT_CTX_X30 0x58
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#define TLKD_C_RT_CTX_SIZE 0x60
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#define TLKD_C_RT_CTX_ENTRIES (TLKD_C_RT_CTX_SIZE >> DWORD_SHIFT)
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#ifndef __ASSEMBLY__
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#include <cassert.h>
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#include <stdint.h>
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/* AArch64 callee saved general purpose register context structure. */
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DEFINE_REG_STRUCT(c_rt_regs, TLKD_C_RT_CTX_ENTRIES);
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/*
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* Compile time assertion to ensure that both the compiler and linker
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* have the same double word aligned view of the size of the C runtime
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* register context.
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*/
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CASSERT(TLKD_C_RT_CTX_SIZE == sizeof(c_rt_regs_t), \
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assert_tlkd_c_rt_regs_size_mismatch);
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/*******************************************************************************
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* Structure which helps the SPD to maintain the per-cpu state of the SP.
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* 'state' - collection of flags to track SP state e.g. on/off
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* 'mpidr' - mpidr to associate a context with a cpu
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* 'c_rt_ctx' - stack address to restore C runtime context from after
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* returning from a synchronous entry into the SP.
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* 'cpu_ctx' - space to maintain SP architectural state
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* 'saved_tsp_args' - space to store arguments for TSP arithmetic operations
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* which will queried using the TSP_GET_ARGS SMC by TSP.
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******************************************************************************/
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typedef struct tlk_context {
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uint32_t state;
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uint64_t mpidr;
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uint64_t c_rt_ctx;
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cpu_context_t cpu_ctx;
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} tlk_context_t;
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/*******************************************************************************
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* Function & Data prototypes
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******************************************************************************/
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uint64_t tlkd_va_translate(uintptr_t va, int type);
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uint64_t tlkd_enter_sp(uint64_t *c_rt_ctx);
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void __dead2 tlkd_exit_sp(uint64_t c_rt_ctx, uint64_t ret);
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uint64_t tlkd_synchronous_sp_entry(tlk_context_t *tlk_ctx);
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void __dead2 tlkd_synchronous_sp_exit(tlk_context_t *tlk_ctx,
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uint64_t ret);
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void tlkd_init_tlk_ep_state(struct entry_point_info *tlk_entry_point,
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uint32_t rw,
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uint64_t pc,
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tlk_context_t *tlk_ctx);
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#endif /*__ASSEMBLY__*/
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#endif /* __TLKD_PRIVATE_H__ */
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