/* * Copyright (C) 2013 - ARM Ltd * Author: Marc Zyngier <marc.zyngier@arm.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * 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, see <http://www.gnu.org/licenses/>. */ #include <common.h> #include <errno.h> #include <stdio_dev.h> #include <linux/ctype.h> #include <linux/types.h> #include <asm/global_data.h> #include <libfdt.h> #include <fdt_support.h> #include <asm/armv7.h> #include <asm/psci.h> int armv7_apply_memory_carveout(u64 *start, u64 *size) { #ifdef CONFIG_ARMV7_SECURE_RESERVE_SIZE if (*start + *size < CONFIG_ARMV7_SECURE_BASE || *start >= (u64)CONFIG_ARMV7_SECURE_BASE + CONFIG_ARMV7_SECURE_RESERVE_SIZE) return 0; /* carveout must be at the beginning or the end of the bank */ if (*start == CONFIG_ARMV7_SECURE_BASE || *start + *size == (u64)CONFIG_ARMV7_SECURE_BASE + CONFIG_ARMV7_SECURE_RESERVE_SIZE) { if (*size < CONFIG_ARMV7_SECURE_RESERVE_SIZE) { debug("Secure monitor larger than RAM bank!?\n"); return -EINVAL; } *size -= CONFIG_ARMV7_SECURE_RESERVE_SIZE; if (*start == CONFIG_ARMV7_SECURE_BASE) *start += CONFIG_ARMV7_SECURE_RESERVE_SIZE; return 0; } debug("Secure monitor not located at beginning or end of RAM bank\n"); return -EINVAL; #else /* !CONFIG_ARMV7_SECURE_RESERVE_SIZE */ return 0; #endif } int psci_update_dt(void *fdt) { #ifdef CONFIG_ARMV7_NONSEC if (!armv7_boot_nonsec()) return 0; #endif #ifndef CONFIG_ARMV7_SECURE_BASE /* secure code lives in RAM, keep it alive */ fdt_add_mem_rsv(fdt, (unsigned long)__secure_start, __secure_end - __secure_start); #endif return fdt_psci(fdt); }