sdei.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2// Copyright (C) 2017 Arm Ltd.
 3#ifndef __ASM_SDEI_H
 4#define __ASM_SDEI_H
 5
 6/* Values for sdei_exit_mode */
 7#define SDEI_EXIT_HVC  0
 8#define SDEI_EXIT_SMC  1
 9
10#define SDEI_STACK_SIZE		IRQ_STACK_SIZE
11
12#ifndef __ASSEMBLER__
13
14#include <linux/linkage.h>
15#include <linux/preempt.h>
16#include <linux/types.h>
17
18#include <asm/virt.h>
19
20DECLARE_PER_CPU(struct sdei_registered_event *, sdei_active_normal_event);
21DECLARE_PER_CPU(struct sdei_registered_event *, sdei_active_critical_event);
22
23extern unsigned long sdei_exit_mode;
24
25/* Software Delegated Exception entry point from firmware*/
26asmlinkage void __sdei_asm_handler(unsigned long event_num, unsigned long arg,
27				   unsigned long pc, unsigned long pstate);
28
29/* and its CONFIG_UNMAP_KERNEL_AT_EL0 trampoline */
30asmlinkage void __sdei_asm_entry_trampoline(unsigned long event_num,
31						   unsigned long arg,
32						   unsigned long pc,
33						   unsigned long pstate);
34
35/* Abort a running handler. Context is discarded. */
36void __sdei_handler_abort(void);
37
38/*
39 * The above entry point does the minimum to call C code. This function does
40 * anything else, before calling the driver.
41 */
42struct sdei_registered_event;
43asmlinkage unsigned long __sdei_handler(struct pt_regs *regs,
44					struct sdei_registered_event *arg);
45
46unsigned long do_sdei_event(struct pt_regs *regs,
47			    struct sdei_registered_event *arg);
48
49unsigned long sdei_arch_get_entry_point(int conduit);
50#define sdei_arch_get_entry_point(x)	sdei_arch_get_entry_point(x)
51
52#endif /* __ASSEMBLER__ */
53#endif	/* __ASM_SDEI_H */