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eecdf19b73
plat_get_my_stack is called from C, so it can't expect argument registers to be preserved. Stash registers temporarily onto the stack instead. plat_set_my_stack is called during early init, when there exists no stack. Use any register other than argument registers to stash temporary values. Change-Id: I98052e20671d0933201d45ec7a5affccd71ce08c Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
48 lines
1.4 KiB
ArmAsm
48 lines
1.4 KiB
ArmAsm
/*
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* Copyright (c) 2016-2017, 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 <platform_def.h>
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.weak plat_get_my_stack
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.weak plat_set_my_stack
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/* -----------------------------------------------------
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* uintptr_t plat_get_my_stack (u_register_t mpidr)
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*
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* For a given 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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push {r4, lr}
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get_my_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE
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pop {r4, pc}
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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 r4, lr
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get_my_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE
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mov sp, r0
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bx r4
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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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