/*
* Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <asm_macros.S>
#include <platform.h>
.local pcpu_dv_mem_stack
.local platform_normal_stacks
.weak platform_set_stack
.weak platform_get_stack
.weak platform_set_coherent_stack
/* -----------------------------------------------------
* void platform_set_coherent_stack (unsigned long mpidr)
*
* For a given CPU, this function sets the stack pointer
* to a stack allocated in device memory. This stack can
* be used by C code which enables/disables the SCTLR.M
* SCTLR.C bit e.g. while powering down a cpu
* -----------------------------------------------------
*/
func platform_set_coherent_stack
mov x5, x30 // lr
get_mp_stack pcpu_dv_mem_stack, PCPU_DV_MEM_STACK_SIZE
mov sp, x0
ret x5
/* -----------------------------------------------------
* 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
/* -----------------------------------------------------
* 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
/* -----------------------------------------------------
* Per-cpu stacks in normal memory.
* Used for C code during runtime execution (when coherent
* stacks are not required).
* Each cpu gets a stack of PLATFORM_STACK_SIZE bytes.
* -----------------------------------------------------
*/
declare_stack platform_normal_stacks, tzfw_normal_stacks, \
PLATFORM_STACK_SIZE, PLATFORM_CORE_COUNT
/* -----------------------------------------------------
* Per-cpu stacks in device memory.
* Used for C code just before power down or right after
* power up when the MMU or caches need to be turned on
* or off.
* Each cpu gets a stack of PCPU_DV_MEM_STACK_SIZE bytes.
* -----------------------------------------------------
*/
declare_stack pcpu_dv_mem_stack, tzfw_coherent_mem, \
PCPU_DV_MEM_STACK_SIZE, PLATFORM_CORE_COUNT
