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https://github.com/ARM-software/arm-trusted-firmware.git
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871de5373d
Change-Id: I40d040aa05bcbf11536a96ce59827711456b93a8 Co-authored-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com> Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
101 lines
3.2 KiB
ArmAsm
101 lines
3.2 KiB
ArmAsm
/*
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* Copyright (c) 2014-2017, 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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#include <arch.h>
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#include <asm_macros.S>
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#include <assert_macros.S>
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#include <platform_def.h>
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.local platform_normal_stacks
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.weak plat_get_my_stack
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.weak plat_set_my_stack
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.globl platform_get_stack
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.globl platform_set_stack
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/* ---------------------------------------------------------------------
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* When the compatility layer is disabled, the new platform APIs
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* viz plat_get_my_stack() and plat_set_my_stack() are
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* supported by the platform and the previous APIs platform_get_stack()
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* and platform_set_stack() are defined in terms of new APIs making use
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* of the fact that they are only ever invoked for the current CPU.
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* This is to enable components of Trusted Firmware like SPDs using the
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* old platform APIs to continue to work.
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* --------------------------------------------------------------------
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*/
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/* -------------------------------------------------------
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* unsigned long platform_get_stack (unsigned long mpidr)
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*
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* For the current CPU, this function returns the stack
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* pointer for a stack allocated in device memory. The
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* 'mpidr' should correspond to that of the current CPU.
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* This function is deprecated and plat_get_my_stack()
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* should be used instead.
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* -------------------------------------------------------
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*/
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func_deprecated platform_get_stack
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#if ENABLE_ASSERTIONS
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mrs x1, mpidr_el1
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cmp x0, x1
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ASM_ASSERT(eq)
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#endif
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b plat_get_my_stack
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endfunc_deprecated platform_get_stack
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/* -----------------------------------------------------
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* void platform_set_stack (unsigned long mpidr)
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*
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* For the current CPU, this function sets the stack pointer
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* to a stack allocated in normal memory. The
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* 'mpidr' should correspond to that of the current CPU.
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* This function is deprecated and plat_get_my_stack()
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* should be used instead.
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* -----------------------------------------------------
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*/
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func_deprecated platform_set_stack
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#if ENABLE_ASSERTIONS
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mrs x1, mpidr_el1
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cmp x0, x1
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ASM_ASSERT(eq)
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#endif
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b plat_set_my_stack
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endfunc_deprecated platform_set_stack
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/* -----------------------------------------------------
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* uintptr_t plat_get_my_stack ()
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*
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* For the current CPU, this function returns the stack
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* pointer for a stack allocated in device memory.
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* -----------------------------------------------------
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*/
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func plat_get_my_stack
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mov x10, x30 // lr
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get_my_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE
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ret x10
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endfunc plat_get_my_stack
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/* -----------------------------------------------------
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* void plat_set_my_stack ()
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*
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* For the current CPU, this function sets the stack
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* pointer to a stack allocated in normal memory.
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* -----------------------------------------------------
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*/
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func plat_set_my_stack
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mov x9, x30 // lr
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bl plat_get_my_stack
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mov sp, x0
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ret x9
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endfunc plat_set_my_stack
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/* -----------------------------------------------------
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* Per-cpu stacks in normal memory. Each cpu gets a
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* stack of PLATFORM_STACK_SIZE bytes.
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* -----------------------------------------------------
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*/
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declare_stack platform_normal_stacks, tzfw_normal_stacks, \
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PLATFORM_STACK_SIZE, PLATFORM_CORE_COUNT, \
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CACHE_WRITEBACK_GRANULE
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