1f35a9205SMarc Zyngier /* 2f35a9205SMarc Zyngier * Copyright (C) 2012 ARM Ltd. 3f35a9205SMarc Zyngier * Author: Marc Zyngier <marc.zyngier@arm.com> 4f35a9205SMarc Zyngier * 5f35a9205SMarc Zyngier * This program is free software: you can redistribute it and/or modify 6f35a9205SMarc Zyngier * it under the terms of the GNU General Public License version 2 as 7f35a9205SMarc Zyngier * published by the Free Software Foundation. 8f35a9205SMarc Zyngier * 9f35a9205SMarc Zyngier * This program is distributed in the hope that it will be useful, 10f35a9205SMarc Zyngier * but WITHOUT ANY WARRANTY; without even the implied warranty of 11f35a9205SMarc Zyngier * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12f35a9205SMarc Zyngier * GNU General Public License for more details. 13f35a9205SMarc Zyngier * 14f35a9205SMarc Zyngier * You should have received a copy of the GNU General Public License 15f35a9205SMarc Zyngier * along with this program. If not, see <http://www.gnu.org/licenses/>. 16f35a9205SMarc Zyngier */ 17f35a9205SMarc Zyngier 18f35a9205SMarc Zyngier #ifndef __ASM__VIRT_H 19f35a9205SMarc Zyngier #define __ASM__VIRT_H 20f35a9205SMarc Zyngier 21f35a9205SMarc Zyngier #define BOOT_CPU_MODE_EL2 (0x0e12b007) 22f35a9205SMarc Zyngier 23f35a9205SMarc Zyngier #ifndef __ASSEMBLY__ 24f35a9205SMarc Zyngier 25f35a9205SMarc Zyngier /* 26f35a9205SMarc Zyngier * __boot_cpu_mode records what mode CPUs were booted in. 27f35a9205SMarc Zyngier * A correctly-implemented bootloader must start all CPUs in the same mode: 28f35a9205SMarc Zyngier * In this case, both 32bit halves of __boot_cpu_mode will contain the 29f35a9205SMarc Zyngier * same value (either 0 if booted in EL1, BOOT_CPU_MODE_EL2 if booted in EL2). 30f35a9205SMarc Zyngier * 31f35a9205SMarc Zyngier * Should the bootloader fail to do this, the two values will be different. 32f35a9205SMarc Zyngier * This allows the kernel to flag an error when the secondaries have come up. 33f35a9205SMarc Zyngier */ 34f35a9205SMarc Zyngier extern u32 __boot_cpu_mode[2]; 35f35a9205SMarc Zyngier 36*712c6ff4SMarc Zyngier void __hyp_set_vectors(phys_addr_t phys_vector_base); 37*712c6ff4SMarc Zyngier phys_addr_t __hyp_get_vectors(void); 38*712c6ff4SMarc Zyngier 39f35a9205SMarc Zyngier /* Reports the availability of HYP mode */ 40f35a9205SMarc Zyngier static inline bool is_hyp_mode_available(void) 41f35a9205SMarc Zyngier { 42f35a9205SMarc Zyngier return (__boot_cpu_mode[0] == BOOT_CPU_MODE_EL2 && 43f35a9205SMarc Zyngier __boot_cpu_mode[1] == BOOT_CPU_MODE_EL2); 44f35a9205SMarc Zyngier } 45f35a9205SMarc Zyngier 46f35a9205SMarc Zyngier /* Check if the bootloader has booted CPUs in different modes */ 47f35a9205SMarc Zyngier static inline bool is_hyp_mode_mismatched(void) 48f35a9205SMarc Zyngier { 49f35a9205SMarc Zyngier return __boot_cpu_mode[0] != __boot_cpu_mode[1]; 50f35a9205SMarc Zyngier } 51f35a9205SMarc Zyngier 52f35a9205SMarc Zyngier #endif /* __ASSEMBLY__ */ 53f35a9205SMarc Zyngier 54f35a9205SMarc Zyngier #endif /* ! __ASM__VIRT_H */ 55