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/*
* Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <asm_macros.S>
#include <assert_macros.S>
#include <platform_def.h>
.local platform_normal_stacks
#if ENABLE_PLAT_COMPAT
.globl plat_get_my_stack
.globl plat_set_my_stack
.weak platform_get_stack
.weak platform_set_stack
#else
.weak plat_get_my_stack
.weak plat_set_my_stack
.globl platform_get_stack
.globl platform_set_stack
#endif /* __ENABLE_PLAT_COMPAT__ */
#if ENABLE_PLAT_COMPAT
/* ---------------------------------------------------------------------
* When the compatility layer is enabled, the new platform APIs
* viz plat_get_my_stack() and plat_set_my_stack() need to be
* defined using the previous APIs platform_get_stack() and
* platform_set_stack(). Also we need to provide weak definitions
* of platform_get_stack() and platform_set_stack() for the platforms
* to reuse.
* --------------------------------------------------------------------
*/
/* -----------------------------------------------------
* unsigned long plat_get_my_stack ()
*
* For the current CPU, this function returns the stack
* pointer for a stack allocated in device memory.
* -----------------------------------------------------
*/
func plat_get_my_stack
mrs x0, mpidr_el1
b platform_get_stack
endfunc plat_get_my_stack
/* -----------------------------------------------------
* void plat_set_my_stack ()
*
* For the current CPU, this function sets the stack
* pointer to a stack allocated in normal memory.
* -----------------------------------------------------
*/
func plat_set_my_stack
mrs x0, mpidr_el1
b platform_set_stack
endfunc plat_set_my_stack
/* -----------------------------------------------------
* unsigned long platform_get_stack (unsigned long mpidr)
*
* For a given CPU, this function returns the stack
* pointer for a stack allocated in device memory.
* -----------------------------------------------------
*/
func platform_get_stack
mov x10, x30 // lr
get_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE
ret x10
endfunc platform_get_stack
/* -----------------------------------------------------
* void platform_set_stack (unsigned long mpidr)
*
* For a given CPU, this function sets the stack pointer
* to a stack allocated in normal memory.
* -----------------------------------------------------
*/
func platform_set_stack
mov x9, x30 // lr
bl platform_get_stack
mov sp, x0
ret x9
endfunc platform_set_stack
#else
/* ---------------------------------------------------------------------
* When the compatility layer is disabled, the new platform APIs
* viz plat_get_my_stack() and plat_set_my_stack() are
* supported by the platform and the previous APIs platform_get_stack()
* and platform_set_stack() are defined in terms of new APIs making use
* of the fact that they are only ever invoked for the current CPU.
* This is to enable components of Trusted Firmware like SPDs using the
* old platform APIs to continue to work.
* --------------------------------------------------------------------
*/
/* -------------------------------------------------------
* unsigned long platform_get_stack (unsigned long mpidr)
*
* For the current CPU, this function returns the stack
* pointer for a stack allocated in device memory. The
* 'mpidr' should correspond to that of the current CPU.
* This function is deprecated and plat_get_my_stack()
* should be used instead.
* -------------------------------------------------------
*/
func_deprecated platform_get_stack
#if ENABLE_ASSERTIONS
mrs x1, mpidr_el1
cmp x0, x1
ASM_ASSERT(eq)
#endif
b plat_get_my_stack
endfunc_deprecated platform_get_stack
/* -----------------------------------------------------
* void platform_set_stack (unsigned long mpidr)
*
* For the current CPU, this function sets the stack pointer
* to a stack allocated in normal memory. The
* 'mpidr' should correspond to that of the current CPU.
* This function is deprecated and plat_get_my_stack()
* should be used instead.
* -----------------------------------------------------
*/
func_deprecated platform_set_stack
#if ENABLE_ASSERTIONS
mrs x1, mpidr_el1
cmp x0, x1
ASM_ASSERT(eq)
#endif
b plat_set_my_stack
endfunc_deprecated platform_set_stack
/* -----------------------------------------------------
* uintptr_t plat_get_my_stack ()
*
* For the current CPU, this function returns the stack
* pointer for a stack allocated in device memory.
* -----------------------------------------------------
*/
func plat_get_my_stack
mov x10, x30 // lr
get_my_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE
ret x10
endfunc plat_get_my_stack
/* -----------------------------------------------------
* void plat_set_my_stack ()
*
* For the current CPU, this function sets the stack
* pointer to a stack allocated in normal memory.
* -----------------------------------------------------
*/
func plat_set_my_stack
mov x9, x30 // lr
bl plat_get_my_stack
mov sp, x0
ret x9
endfunc plat_set_my_stack
#endif /*__ENABLE_PLAT_COMPAT__*/
/* -----------------------------------------------------
* Per-cpu stacks in normal memory. Each cpu gets a
* stack of PLATFORM_STACK_SIZE bytes.
* -----------------------------------------------------
*/
declare_stack platform_normal_stacks, tzfw_normal_stacks, \
PLATFORM_STACK_SIZE, PLATFORM_CORE_COUNT, \
CACHE_WRITEBACK_GRANULE
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