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 <sel4/sel4.h>
16#include <utils/arith.h>
17
18#define ARCH_SYSCALL_INSTRUCTION_SIZE 4
19
20static inline int
21sel4utils_is_read_fault(void)
22{
23    seL4_Word fsr = seL4_GetMR(seL4_VMFault_FSR);
24    return (fsr & (BIT(6))) == 0;
25}
26
27static inline void
28sel4utils_set_instruction_pointer(seL4_UserContext *regs, seL4_Word value)
29{
30    regs->pc = value;
31}
32
33static inline seL4_Word
34sel4utils_get_instruction_pointer(seL4_UserContext regs)
35{
36    return regs.pc;
37}
38
39static inline void
40sel4utils_set_stack_pointer(seL4_UserContext *regs, seL4_Word value)
41{
42    regs->sp = value;
43}
44
45static inline void
46sel4utils_set_arg0(seL4_UserContext *regs, seL4_Word value)
47{
48    regs->x0 = value;
49}
50
51static inline seL4_Word
52sel4utils_get_sp(seL4_UserContext regs)
53{
54    return regs.sp;
55}
56
57