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