| /* |
| * Copyright (c) 2014-2020, 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 |
| .weak plat_get_my_stack |
| .weak plat_set_my_stack |
| |
| /* --------------------------------------------------------------------- |
| * When the compatility layer is disabled, the platform APIs |
| * 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. |
| * -------------------------------------------------------------------- |
| */ |
| |
| /* ----------------------------------------------------- |
| * 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 |
| #if (defined(IMAGE_BL31) && RECLAIM_INIT_CODE) |
| #if (PLATFORM_CORE_COUNT == 1) |
| /* Single CPU */ |
| adrp x0, __PRIMARY_STACK__ |
| add x0, x0, :lo12:__PRIMARY_STACK__ |
| ret |
| #else |
| mov x10, x30 |
| bl plat_my_core_pos |
| cbnz x0, 2f |
| |
| /* Primary CPU */ |
| adrp x0, __PRIMARY_STACK__ |
| add x0, x0, :lo12:__PRIMARY_STACK__ |
| ret x10 |
| |
| /* Secondary CPU */ |
| 2: sub x0, x0, #(PLATFORM_CORE_COUNT - 1) |
| adrp x1, __STACKS_END__ |
| adrp x2, __STACK_SIZE__ |
| add x1, x1, :lo12:__STACKS_END__ |
| add x2, x2, :lo12:__STACK_SIZE__ |
| |
| madd x0, x0, x2, x1 |
| bic x0, x0, #(CACHE_WRITEBACK_GRANULE - 1) |
| ret x10 |
| #endif |
| /* Prevent linker from removal of stack section */ |
| .quad platform_normal_stacks |
| |
| #else /* !(IMAGE_BL31 && RECLAIM_INIT_CODE) */ |
| mov x10, x30 |
| get_my_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE |
| ret x10 |
| |
| #endif /* IMAGE_BL31 && RECLAIM_INIT_CODE */ |
| 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 |
| bl plat_get_my_stack |
| mov sp, x0 |
| ret x9 |
| endfunc plat_set_my_stack |
| |
| /* ----------------------------------------------------- |
| * 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 |