| /* |
| * arch/arm/cpu/armv8/cpu_id.c |
| * |
| * Copyright (C) 2015 Amlogic, Inc. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #include <common.h> |
| #include <asm/cpu_id.h> |
| #include <asm/arch/secure_apb.h> |
| #include <asm/arch/io.h> |
| |
| /** |
| * TODO: This should be moved to a RO region of registers or SRAM that |
| * provides static system information that's needed across all software |
| * |
| * Chip ID copy to avoid unnecessary message exchange. |
| */ |
| chip_id_t aml_chip_id = { 0, { 0 } }; |
| |
| cpu_id_t get_cpu_id(void) |
| { |
| cpu_id_t cpu_id; |
| unsigned int cpu_id_reg = readl(P_AO_SEC_SD_CFG8); |
| |
| cpu_id.family_id = (cpu_id_reg >> 24) & (0XFF); |
| cpu_id.package_id = (cpu_id_reg >> 16) & (0XF0); |
| cpu_id.chip_rev = (cpu_id_reg >> 8) & (0XFF); |
| cpu_id.layout_ver = (cpu_id_reg) & (0XF); |
| return cpu_id; |
| } |
| |
| int get_chip_id(unsigned char *buff, unsigned int size) |
| { |
| int rc = 0; |
| |
| if (buff == NULL || size < 16) |
| return -1; |
| |
| if (aml_chip_id.version == 0) { |
| /* Chip ID has not been fetched yet */ |
| rc = __get_chip_id(&aml_chip_id.chipid[0], 16); |
| |
| /* Mark version if chip ID is fetched successfully */ |
| if (rc == 0) |
| aml_chip_id.version = 2; |
| } |
| |
| memcpy(buff, &aml_chip_id.chipid[0], 16); |
| return rc; |
| } |