99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2012 Linaro Limited.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef VIRT_H
|
||
|
|
#define VIRT_H
|
||
|
|
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Flag indicating that the kernel was not entered in the same mode on every
|
||
|
|
* CPU. The zImage loader stashes this value in an SPSR, so we need an
|
||
|
|
* architecturally defined flag bit here.
|
||
|
|
*/
|
||
|
|
#define BOOT_CPU_MODE_MISMATCH PSR_N_BIT
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
#include <asm/cacheflush.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_ARM_VIRT_EXT
|
||
|
|
/*
|
||
|
|
* __boot_cpu_mode records what mode the primary CPU was booted in.
|
||
|
|
* A correctly-implemented bootloader must start all CPUs in the same mode:
|
||
|
|
* if it fails to do this, the flag BOOT_CPU_MODE_MISMATCH is set to indicate
|
||
|
|
* that some CPU(s) were booted in a different mode.
|
||
|
|
*
|
||
|
|
* This allows the kernel to flag an error when the secondaries have come up.
|
||
|
|
*/
|
||
|
|
extern int __boot_cpu_mode;
|
||
|
|
|
||
|
|
static inline void sync_boot_mode(void)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* As secondaries write to __boot_cpu_mode with caches disabled, we
|
||
|
|
* must flush the corresponding cache entries to ensure the visibility
|
||
|
|
* of their writes.
|
||
|
|
*/
|
||
|
|
sync_cache_r(&__boot_cpu_mode);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __hyp_set_vectors(unsigned long phys_vector_base);
|
||
|
|
void __hyp_reset_vectors(void);
|
||
|
|
#else
|
||
|
|
#define __boot_cpu_mode (SVC_MODE)
|
||
|
|
#define sync_boot_mode()
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef ZIMAGE
|
||
|
|
void hyp_mode_check(void);
|
||
|
|
|
||
|
|
/* Reports the availability of HYP mode */
|
||
|
|
static inline bool is_hyp_mode_available(void)
|
||
|
|
{
|
||
|
|
return ((__boot_cpu_mode & MODE_MASK) == HYP_MODE &&
|
||
|
|
!(__boot_cpu_mode & BOOT_CPU_MODE_MISMATCH));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check if the bootloader has booted CPUs in different modes */
|
||
|
|
static inline bool is_hyp_mode_mismatched(void)
|
||
|
|
{
|
||
|
|
return !!(__boot_cpu_mode & BOOT_CPU_MODE_MISMATCH);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool is_kernel_in_hyp_mode(void)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool has_vhe(void)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* The section containing the hypervisor idmap text */
|
||
|
|
extern char __hyp_idmap_text_start[];
|
||
|
|
extern char __hyp_idmap_text_end[];
|
||
|
|
|
||
|
|
/* The section containing the hypervisor text */
|
||
|
|
extern char __hyp_text_start[];
|
||
|
|
extern char __hyp_text_end[];
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
/* Only assembly code should need those */
|
||
|
|
|
||
|
|
#define HVC_SET_VECTORS 0
|
||
|
|
#define HVC_SOFT_RESTART 1
|
||
|
|
#define HVC_RESET_VECTORS 2
|
||
|
|
|
||
|
|
#define HVC_STUB_HCALL_NR 3
|
||
|
|
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
|
||
|
|
#define HVC_STUB_ERR 0xbadca11
|
||
|
|
|
||
|
|
#endif /* ! VIRT_H */
|