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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/arm64/include/asm/virt.h |
Initial import
Diffstat (limited to 'arch/arm64/include/asm/virt.h')
-rw-r--r-- | arch/arm64/include/asm/virt.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/virt.h b/arch/arm64/include/asm/virt.h new file mode 100644 index 000000000..7a5df5252 --- /dev/null +++ b/arch/arm64/include/asm/virt.h @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2012 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/>. + */ + +#ifndef __ASM__VIRT_H +#define __ASM__VIRT_H + +#define BOOT_CPU_MODE_EL1 (0xe11) +#define BOOT_CPU_MODE_EL2 (0xe12) + +#ifndef __ASSEMBLY__ + +/* + * __boot_cpu_mode records what mode CPUs were booted in. + * A correctly-implemented bootloader must start all CPUs in the same mode: + * In this case, both 32bit halves of __boot_cpu_mode will contain the + * same value (either 0 if booted in EL1, BOOT_CPU_MODE_EL2 if booted in EL2). + * + * Should the bootloader fail to do this, the two values will be different. + * This allows the kernel to flag an error when the secondaries have come up. + */ +extern u32 __boot_cpu_mode[2]; + +void __hyp_set_vectors(phys_addr_t phys_vector_base); +phys_addr_t __hyp_get_vectors(void); + +/* Reports the availability of HYP mode */ +static inline bool is_hyp_mode_available(void) +{ + return (__boot_cpu_mode[0] == BOOT_CPU_MODE_EL2 && + __boot_cpu_mode[1] == BOOT_CPU_MODE_EL2); +} + +/* Check if the bootloader has booted CPUs in different modes */ +static inline bool is_hyp_mode_mismatched(void) +{ + return __boot_cpu_mode[0] != __boot_cpu_mode[1]; +} + +/* The section containing the hypervisor text */ +extern char __hyp_text_start[]; +extern char __hyp_text_end[]; + +#endif /* __ASSEMBLY__ */ + +#endif /* ! __ASM__VIRT_H */ |