| /* |
| * Copyright (c) 2018, Arm Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <platform_def.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 r9, lr |
| get_mp_stack pcpu_dv_mem_stack, PCPU_DV_MEM_STACK_SIZE |
| mov sp, r0 |
| bx r9 |
| endfunc platform_set_coherent_stack |
| |
| /* ----------------------------------------------------- |
| * uintptr_t platform_get_stack (u_register_t mpidr) |
| * |
| * For a given CPU, this function returns the stack |
| * pointer for a stack allocated in normal memory. |
| * ----------------------------------------------------- |
| */ |
| func platform_get_stack |
| mov r9, lr |
| get_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE |
| bx r9 |
| endfunc platform_get_stack |
| |
| /* ----------------------------------------------------- |
| * void platform_set_stack (u_register_t mpidr) |
| * |
| * For a given CPU, this function sets the stack |
| * pointer to a stack allocated in normal memory. |
| * ----------------------------------------------------- |
| */ |
| func platform_set_stack |
| mov r9, lr |
| get_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE |
| mov sp, r0 |
| bx r9 |
| endfunc platform_set_stack |
| |
| /* ----------------------------------------------------- |
| * 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, tftf_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, tftf_coherent_stacks, \ |
| PCPU_DV_MEM_STACK_SIZE, PLATFORM_CORE_COUNT |