projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 80c59daf DM |
1 | /* |
| 2 | * Copyright (c) 2012 Linaro Limited. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License as published by | |
| 6 | * the Free Software Foundation; either version 2 of the License, or | |
| 7 | * (at your option) any later version. | |
| 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 along | |
| 15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
| 16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 17 | */ | |
| 18 | ||
| 19 | #ifndef VIRT_H | |
| 20 | #define VIRT_H | |
| 21 | ||
| 22 | #include <asm/ptrace.h> | |
| 23 | ||
| 24 | /* | |
| 25 | * Flag indicating that the kernel was not entered in the same mode on every | |
| 26 | * CPU. The zImage loader stashes this value in an SPSR, so we need an | |
| 27 | * architecturally defined flag bit here (the N flag, as it happens) | |
| 28 | */ | |
| 29 | #define BOOT_CPU_MODE_MISMATCH (1<<31) | |
| 30 | ||
| 31 | #ifndef __ASSEMBLY__ | |
| 32 | ||
| 33 | #ifdef CONFIG_ARM_VIRT_EXT | |
| 34 | /* | |
| 35 | * __boot_cpu_mode records what mode the primary CPU was booted in. | |
| 36 | * A correctly-implemented bootloader must start all CPUs in the same mode: | |
| 37 | * if it fails to do this, the flag BOOT_CPU_MODE_MISMATCH is set to indicate | |
| 38 | * that some CPU(s) were booted in a different mode. | |
| 39 | * | |
| 40 | * This allows the kernel to flag an error when the secondaries have come up. | |
| 41 | */ | |
| 42 | extern int __boot_cpu_mode; | |
| 43 | ||
| 44 | void __hyp_set_vectors(unsigned long phys_vector_base); | |
| 45 | unsigned long __hyp_get_vectors(void); | |
| 46 | #else | |
| 47 | #define __boot_cpu_mode (SVC_MODE) | |
| 48 | #endif | |
| 49 | ||
| 4588c34d DM |
50 | #ifndef ZIMAGE |
| 51 | void hyp_mode_check(void); | |
| 52 | ||
| 53 | /* Reports the availability of HYP mode */ | |
| 54 | static inline bool is_hyp_mode_available(void) | |
| 55 | { | |
| 56 | return ((__boot_cpu_mode & MODE_MASK) == HYP_MODE && | |
| 57 | !(__boot_cpu_mode & BOOT_CPU_MODE_MISMATCH)); | |
| 58 | } | |
| 59 | ||
| 60 | /* Check if the bootloader has booted CPUs in different modes */ | |
| 61 | static inline bool is_hyp_mode_mismatched(void) | |
| 62 | { | |
| 63 | return !!(__boot_cpu_mode & BOOT_CPU_MODE_MISMATCH); | |
| 64 | } | |
| 65 | #endif | |
| 66 | ||
| 80c59daf DM |
67 | #endif /* __ASSEMBLY__ */ |
| 68 | ||
| 69 | #endif /* ! VIRT_H */ |