| /* |
| * arch/aarch64/stack.S - stack handling |
| * |
| * Copyright (C) 2015 ARM Limited. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE.txt file. |
| */ |
| |
| .globl setup_stack |
| .globl stack_top |
| .globl stack_bottom |
| |
| .text |
| /* |
| * Setup initial stack pointer |
| * x0: logical CPU ID |
| * Clobbers x1 and x2 |
| */ |
| setup_stack: |
| mov w1, #STACK_SIZE |
| ldr x2, =stack_top |
| umsubl x0, w0, w1, x2 // sp = st_base - cpu * st_size |
| mov sp, x0 |
| ret |
| |
| .section .stack |
| .align 4 |
| stack_bottom: |
| .irp cpu, CPU_IDS |
| .space STACK_SIZE |
| .endr |
| stack_top: |
