1/* 2 * Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7#include <arch.h> 8#include <asm_macros.S> 9#include <assert_macros.S> 10#include <platform_def.h> 11 12 .local platform_normal_stacks 13 .weak plat_get_my_stack 14 .weak plat_set_my_stack 15 .globl platform_get_stack 16 .globl platform_set_stack 17 18 /* --------------------------------------------------------------------- 19 * When the compatility layer is disabled, the new platform APIs 20 * viz plat_get_my_stack() and plat_set_my_stack() are 21 * supported by the platform and the previous APIs platform_get_stack() 22 * and platform_set_stack() are defined in terms of new APIs making use 23 * of the fact that they are only ever invoked for the current CPU. 24 * This is to enable components of Trusted Firmware like SPDs using the 25 * old platform APIs to continue to work. 26 * -------------------------------------------------------------------- 27 */ 28 29 /* ----------------------------------------------------- 30 * uintptr_t plat_get_my_stack () 31 * 32 * For the current CPU, this function returns the stack 33 * pointer for a stack allocated in device memory. 34 * ----------------------------------------------------- 35 */ 36func plat_get_my_stack 37 mov x10, x30 // lr 38 get_my_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE 39 ret x10 40endfunc plat_get_my_stack 41 42 /* ----------------------------------------------------- 43 * void plat_set_my_stack () 44 * 45 * For the current CPU, this function sets the stack 46 * pointer to a stack allocated in normal memory. 47 * ----------------------------------------------------- 48 */ 49func plat_set_my_stack 50 mov x9, x30 // lr 51 bl plat_get_my_stack 52 mov sp, x0 53 ret x9 54endfunc plat_set_my_stack 55 56 /* ----------------------------------------------------- 57 * Per-cpu stacks in normal memory. Each cpu gets a 58 * stack of PLATFORM_STACK_SIZE bytes. 59 * ----------------------------------------------------- 60 */ 61declare_stack platform_normal_stacks, tzfw_normal_stacks, \ 62 PLATFORM_STACK_SIZE, PLATFORM_CORE_COUNT, \ 63 CACHE_WRITEBACK_GRANULE 64