Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / arch / arm / include / asm / virt.h
blob141144f333a2e397f476c236c59aeb3bec766762
1 /*
2 * Copyright (c) 2012 Linaro Limited.
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.
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.
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.
19 #ifndef VIRT_H
20 #define VIRT_H
22 #include <asm/ptrace.h>
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.
29 #define BOOT_CPU_MODE_MISMATCH PSR_N_BIT
31 #ifndef __ASSEMBLY__
32 #include <asm/cacheflush.h>
34 #ifdef CONFIG_ARM_VIRT_EXT
36 * __boot_cpu_mode records what mode the primary CPU was booted in.
37 * A correctly-implemented bootloader must start all CPUs in the same mode:
38 * if it fails to do this, the flag BOOT_CPU_MODE_MISMATCH is set to indicate
39 * that some CPU(s) were booted in a different mode.
41 * This allows the kernel to flag an error when the secondaries have come up.
43 extern int __boot_cpu_mode;
45 static inline void sync_boot_mode(void)
48 * As secondaries write to __boot_cpu_mode with caches disabled, we
49 * must flush the corresponding cache entries to ensure the visibility
50 * of their writes.
52 sync_cache_r(&__boot_cpu_mode);
55 void __hyp_set_vectors(unsigned long phys_vector_base);
56 void __hyp_reset_vectors(void);
57 #else
58 #define __boot_cpu_mode (SVC_MODE)
59 #define sync_boot_mode()
60 #endif
62 #ifndef ZIMAGE
63 void hyp_mode_check(void);
65 /* Reports the availability of HYP mode */
66 static inline bool is_hyp_mode_available(void)
68 return ((__boot_cpu_mode & MODE_MASK) == HYP_MODE &&
69 !(__boot_cpu_mode & BOOT_CPU_MODE_MISMATCH));
72 /* Check if the bootloader has booted CPUs in different modes */
73 static inline bool is_hyp_mode_mismatched(void)
75 return !!(__boot_cpu_mode & BOOT_CPU_MODE_MISMATCH);
78 static inline bool is_kernel_in_hyp_mode(void)
80 return false;
83 static inline bool has_vhe(void)
85 return false;
88 /* The section containing the hypervisor idmap text */
89 extern char __hyp_idmap_text_start[];
90 extern char __hyp_idmap_text_end[];
92 /* The section containing the hypervisor text */
93 extern char __hyp_text_start[];
94 extern char __hyp_text_end[];
95 #endif
97 #else
99 /* Only assembly code should need those */
101 #define HVC_SET_VECTORS 0
102 #define HVC_SOFT_RESTART 1
103 #define HVC_RESET_VECTORS 2
105 #define HVC_STUB_HCALL_NR 3
107 #endif /* __ASSEMBLY__ */
109 #define HVC_STUB_ERR 0xbadca11
111 #endif /* ! VIRT_H */