| /* |
| * Copyright (c) 2014-2017, 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 |
| #if ENABLE_PLAT_COMPAT |
| .globl plat_get_my_stack |
| .globl plat_set_my_stack |
| .weak platform_get_stack |
| .weak platform_set_stack |
| #else |
| .weak plat_get_my_stack |
| .weak plat_set_my_stack |
| .globl platform_get_stack |
| .globl platform_set_stack |
| #endif /* __ENABLE_PLAT_COMPAT__ */ |
| |
| #if ENABLE_PLAT_COMPAT |
| /* --------------------------------------------------------------------- |
| * When the compatility layer is enabled, the new platform APIs |
| * viz plat_get_my_stack() and plat_set_my_stack() need to be |
| * defined using the previous APIs platform_get_stack() and |
| * platform_set_stack(). Also we need to provide weak definitions |
| * of platform_get_stack() and platform_set_stack() for the platforms |
| * to reuse. |
| * -------------------------------------------------------------------- |
| */ |
| |
| /* ----------------------------------------------------- |
| * unsigned long 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 |
| mrs x0, mpidr_el1 |
| b platform_get_stack |
| 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 |
| mrs x0, mpidr_el1 |
| b platform_set_stack |
| endfunc plat_set_my_stack |
| |
| /* ----------------------------------------------------- |
| * 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 |
| endfunc platform_get_stack |
| |
| /* ----------------------------------------------------- |
| * 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 |
| endfunc platform_set_stack |
| |
| #else |
| /* --------------------------------------------------------------------- |
| * When the compatility layer is disabled, the new platform APIs |
| * viz 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. |
| * -------------------------------------------------------------------- |
| */ |
| |
| /* ------------------------------------------------------- |
| * unsigned long platform_get_stack (unsigned long mpidr) |
| * |
| * For the current CPU, this function returns the stack |
| * pointer for a stack allocated in device memory. The |
| * 'mpidr' should correspond to that of the current CPU. |
| * This function is deprecated and plat_get_my_stack() |
| * should be used instead. |
| * ------------------------------------------------------- |
| */ |
| func_deprecated platform_get_stack |
| #if ENABLE_ASSERTIONS |
| mrs x1, mpidr_el1 |
| cmp x0, x1 |
| ASM_ASSERT(eq) |
| #endif |
| b plat_get_my_stack |
| endfunc_deprecated platform_get_stack |
| |
| /* ----------------------------------------------------- |
| * void platform_set_stack (unsigned long mpidr) |
| * |
| * For the current CPU, this function sets the stack pointer |
| * to a stack allocated in normal memory. The |
| * 'mpidr' should correspond to that of the current CPU. |
| * This function is deprecated and plat_get_my_stack() |
| * should be used instead. |
| * ----------------------------------------------------- |
| */ |
| func_deprecated platform_set_stack |
| #if ENABLE_ASSERTIONS |
| mrs x1, mpidr_el1 |
| cmp x0, x1 |
| ASM_ASSERT(eq) |
| #endif |
| b plat_set_my_stack |
| endfunc_deprecated platform_set_stack |
| |
| /* ----------------------------------------------------- |
| * 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 |
| mov x10, x30 // lr |
| get_my_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE |
| ret x10 |
| 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 // lr |
| bl plat_get_my_stack |
| mov sp, x0 |
| ret x9 |
| endfunc plat_set_my_stack |
| |
| #endif /*__ENABLE_PLAT_COMPAT__*/ |
| |
| /* ----------------------------------------------------- |
| * 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 |
