1/*
2 * Copyright 2017, Data61
3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
4 * ABN 41 687 119 230.
5 *
6 * This software may be distributed and modified according to the terms of
7 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
8 * See "LICENSE_BSD2.txt" for details.
9 *
10 * @TAG(DATA61_BSD)
11 */
12
13#pragma once
14
15#include <autoconf.h>
16#include <sel4utils/gen_config.h>
17#include <sel4/sel4.h>
18#include <utils/arith.h>
19
20#define ARCH_SYSCALL_INSTRUCTION_SIZE 4
21
22static inline int sel4utils_is_read_fault(void)
23{
24    seL4_Word fsr = seL4_GetMR(seL4_VMFault_FSR);
25#if defined(CONFIG_ARM_HYPERVISOR_SUPPORT)
26    return (fsr & (BIT(6))) == 0;
27#else
28    return (fsr & (BIT(11))) == 0;
29#endif
30}
31
32static inline void sel4utils_set_instruction_pointer(seL4_UserContext *regs, seL4_Word value)
33{
34    regs->pc = value;
35}
36
37static inline seL4_Word sel4utils_get_instruction_pointer(seL4_UserContext regs)
38{
39    return regs.pc;
40}
41
42static inline void sel4utils_set_stack_pointer(seL4_UserContext *regs, seL4_Word value)
43{
44    regs->sp = value;
45}
46
47static inline void sel4utils_set_arg0(seL4_UserContext *regs, seL4_Word value)
48{
49    regs->r0 = value;
50}
51
52static inline seL4_Word sel4utils_get_sp(seL4_UserContext regs)
53{
54    return regs.sp;
55}
56
57