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 * unsigned long platform_get_stack (unsigned long mpidr) 31 * 32 * For the current CPU, this function returns the stack 33 * pointer for a stack allocated in device memory. The 34 * 'mpidr' should correspond to that of the current CPU. 35 * This function is deprecated and plat_get_my_stack() 36 * should be used instead. 37 * ------------------------------------------------------- 38 */ 39func_deprecated platform_get_stack 40#if ENABLE_ASSERTIONS 41 mrs x1, mpidr_el1 42 cmp x0, x1 43 ASM_ASSERT(eq) 44#endif 45 b plat_get_my_stack 46endfunc_deprecated platform_get_stack 47 48 /* ----------------------------------------------------- 49 * void platform_set_stack (unsigned long mpidr) 50 * 51 * For the current CPU, this function sets the stack pointer 52 * to a stack allocated in normal memory. The 53 * 'mpidr' should correspond to that of the current CPU. 54 * This function is deprecated and plat_get_my_stack() 55 * should be used instead. 56 * ----------------------------------------------------- 57 */ 58func_deprecated platform_set_stack 59#if ENABLE_ASSERTIONS 60 mrs x1, mpidr_el1 61 cmp x0, x1 62 ASM_ASSERT(eq) 63#endif 64 b plat_set_my_stack 65endfunc_deprecated platform_set_stack 66 67 /* ----------------------------------------------------- 68 * uintptr_t plat_get_my_stack () 69 * 70 * For the current CPU, this function returns the stack 71 * pointer for a stack allocated in device memory. 72 * ----------------------------------------------------- 73 */ 74func plat_get_my_stack 75 mov x10, x30 // lr 76 get_my_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE 77 ret x10 78endfunc plat_get_my_stack 79 80 /* ----------------------------------------------------- 81 * void plat_set_my_stack () 82 * 83 * For the current CPU, this function sets the stack 84 * pointer to a stack allocated in normal memory. 85 * ----------------------------------------------------- 86 */ 87func plat_set_my_stack 88 mov x9, x30 // lr 89 bl plat_get_my_stack 90 mov sp, x0 91 ret x9 92endfunc plat_set_my_stack 93 94 /* ----------------------------------------------------- 95 * Per-cpu stacks in normal memory. Each cpu gets a 96 * stack of PLATFORM_STACK_SIZE bytes. 97 * ----------------------------------------------------- 98 */ 99declare_stack platform_normal_stacks, tzfw_normal_stacks, \ 100 PLATFORM_STACK_SIZE, PLATFORM_CORE_COUNT, \ 101 CACHE_WRITEBACK_GRANULE 102