| /* |
| * Copyright (c) 2013, ARM Limited. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * Neither the name of ARM nor the names of its contributors may be used |
| * to endorse or promote products derived from this software without specific |
| * prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <arch.h> |
| |
| .weak cpu_reset_handler |
| |
| |
| .section aarch64_code, "ax"; .align 3 |
| |
| cpu_reset_handler:; .type cpu_reset_handler, %function |
| mov x19, x30 // lr |
| |
| /* --------------------------------------------- |
| * As a bare minimal enable the SMP bit and the |
| * I$ for all aarch64 processors. Also set the |
| * exception vector to something sane. |
| * --------------------------------------------- |
| */ |
| adr x0, early_exceptions |
| bl write_vbar |
| |
| bl read_midr |
| lsr x0, x0, #MIDR_PN_SHIFT |
| and x0, x0, #MIDR_PN_MASK |
| cmp x0, #MIDR_PN_A57 |
| b.eq smp_setup_begin |
| cmp x0, #MIDR_PN_A53 |
| b.ne smp_setup_end |
| smp_setup_begin: |
| bl read_cpuectlr |
| orr x0, x0, #CPUECTLR_SMP_BIT |
| bl write_cpuectlr |
| smp_setup_end: |
| bl read_sctlr |
| orr x0, x0, #SCTLR_I_BIT |
| bl write_sctlr |
| |
| ret x19 |