| /* |
| * spin.S - spin-table boot protocol implementation |
| * |
| * Copyright (C) 2013 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. |
| */ |
| |
| #include "common.S" |
| |
| .text |
| |
| .globl start_no_el3 |
| .globl start_el3 |
| |
| start_el3: |
| /* |
| * Prepare the switch to the EL2_SP1 mode from EL3 |
| */ |
| ldr x0, =SCTLR_EL2_RESET |
| msr sctlr_el2, x0 |
| ldr x0, =start_no_el3 // Return after mode switch |
| mov x1, #SPSR_KERNEL |
| drop_el x1, x0 |
| |
| start_no_el3: |
| /* |
| * Kernel parameters |
| */ |
| mov x0, xzr |
| mov x1, xzr |
| mov x2, xzr |
| mov x3, xzr |
| |
| mrs x4, mpidr_el1 |
| ldr x5, =MPIDR_ID_BITS |
| tst x4, x5 |
| b.eq 2f |
| |
| /* |
| * Secondary CPUs |
| */ |
| 1: wfe |
| ldr x4, mbox |
| cbz x4, 1b |
| br x4 // branch to the given address |
| |
| 2: |
| /* |
| * Primary CPU |
| */ |
| bl ns_init_system |
| ldr x0, =dtb // device tree blob |
| b kernel |
| |
| .ltorg |
| |
| .org 0x80 |
