1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright (C) 2013 - ARM Ltd 3*4882a593Smuzhiyun * Author: Marc Zyngier <marc.zyngier@arm.com> 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or modify 6*4882a593Smuzhiyun * it under the terms of the GNU General Public License version 2 as 7*4882a593Smuzhiyun * published by the Free Software Foundation. 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * This program is distributed in the hope that it will be useful, 10*4882a593Smuzhiyun * but WITHOUT ANY WARRANTY; without even the implied warranty of 11*4882a593Smuzhiyun * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12*4882a593Smuzhiyun * GNU General Public License for more details. 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * You should have received a copy of the GNU General Public License 15*4882a593Smuzhiyun * along with this program. If not, see <http://www.gnu.org/licenses/>. 16*4882a593Smuzhiyun */ 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #include <common.h> 19*4882a593Smuzhiyun #include <errno.h> 20*4882a593Smuzhiyun #include <stdio_dev.h> 21*4882a593Smuzhiyun #include <linux/ctype.h> 22*4882a593Smuzhiyun #include <linux/types.h> 23*4882a593Smuzhiyun #include <asm/global_data.h> 24*4882a593Smuzhiyun #include <linux/libfdt.h> 25*4882a593Smuzhiyun #include <fdt_support.h> 26*4882a593Smuzhiyun #include <asm/armv7.h> 27*4882a593Smuzhiyun #include <asm/psci.h> 28*4882a593Smuzhiyun armv7_apply_memory_carveout(u64 * start,u64 * size)29*4882a593Smuzhiyunint armv7_apply_memory_carveout(u64 *start, u64 *size) 30*4882a593Smuzhiyun { 31*4882a593Smuzhiyun #ifdef CONFIG_ARMV7_SECURE_RESERVE_SIZE 32*4882a593Smuzhiyun if (*start + *size < CONFIG_ARMV7_SECURE_BASE || 33*4882a593Smuzhiyun *start >= (u64)CONFIG_ARMV7_SECURE_BASE + 34*4882a593Smuzhiyun CONFIG_ARMV7_SECURE_RESERVE_SIZE) 35*4882a593Smuzhiyun return 0; 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun /* carveout must be at the beginning or the end of the bank */ 38*4882a593Smuzhiyun if (*start == CONFIG_ARMV7_SECURE_BASE || 39*4882a593Smuzhiyun *start + *size == (u64)CONFIG_ARMV7_SECURE_BASE + 40*4882a593Smuzhiyun CONFIG_ARMV7_SECURE_RESERVE_SIZE) { 41*4882a593Smuzhiyun if (*size < CONFIG_ARMV7_SECURE_RESERVE_SIZE) { 42*4882a593Smuzhiyun debug("Secure monitor larger than RAM bank!?\n"); 43*4882a593Smuzhiyun return -EINVAL; 44*4882a593Smuzhiyun } 45*4882a593Smuzhiyun *size -= CONFIG_ARMV7_SECURE_RESERVE_SIZE; 46*4882a593Smuzhiyun if (*start == CONFIG_ARMV7_SECURE_BASE) 47*4882a593Smuzhiyun *start += CONFIG_ARMV7_SECURE_RESERVE_SIZE; 48*4882a593Smuzhiyun return 0; 49*4882a593Smuzhiyun } 50*4882a593Smuzhiyun debug("Secure monitor not located at beginning or end of RAM bank\n"); 51*4882a593Smuzhiyun return -EINVAL; 52*4882a593Smuzhiyun #else /* !CONFIG_ARMV7_SECURE_RESERVE_SIZE */ 53*4882a593Smuzhiyun return 0; 54*4882a593Smuzhiyun #endif 55*4882a593Smuzhiyun } 56*4882a593Smuzhiyun psci_update_dt(void * fdt)57*4882a593Smuzhiyunint psci_update_dt(void *fdt) 58*4882a593Smuzhiyun { 59*4882a593Smuzhiyun #ifdef CONFIG_ARMV7_NONSEC 60*4882a593Smuzhiyun if (!armv7_boot_nonsec()) 61*4882a593Smuzhiyun return 0; 62*4882a593Smuzhiyun #endif 63*4882a593Smuzhiyun #ifndef CONFIG_ARMV7_SECURE_BASE 64*4882a593Smuzhiyun /* secure code lives in RAM, keep it alive */ 65*4882a593Smuzhiyun fdt_add_mem_rsv(fdt, (unsigned long)__secure_start, 66*4882a593Smuzhiyun __secure_end - __secure_start); 67*4882a593Smuzhiyun #endif 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun return fdt_psci(fdt); 70*4882a593Smuzhiyun } 71