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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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124 lines
2.2 KiB
C
124 lines
2.2 KiB
C
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/*
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* Copyright (C) 2011 Texas Instruments Incorporated
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* Author: Mark Salter <msalter@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __ASM_C6X_SYSCALL_H
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#define __ASM_C6X_SYSCALL_H
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#include <linux/err.h>
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#include <linux/sched.h>
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static inline int syscall_get_nr(struct task_struct *task,
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struct pt_regs *regs)
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{
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return regs->b0;
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}
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static inline void syscall_rollback(struct task_struct *task,
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struct pt_regs *regs)
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{
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/* do nothing */
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}
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static inline long syscall_get_error(struct task_struct *task,
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struct pt_regs *regs)
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{
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return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0;
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}
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static inline long syscall_get_return_value(struct task_struct *task,
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struct pt_regs *regs)
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{
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return regs->a4;
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}
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static inline void syscall_set_return_value(struct task_struct *task,
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struct pt_regs *regs,
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int error, long val)
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{
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regs->a4 = error ?: val;
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}
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static inline void syscall_get_arguments(struct task_struct *task,
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struct pt_regs *regs, unsigned int i,
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unsigned int n, unsigned long *args)
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{
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switch (i) {
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case 0:
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if (!n--)
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break;
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*args++ = regs->a4;
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case 1:
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if (!n--)
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break;
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*args++ = regs->b4;
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case 2:
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if (!n--)
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break;
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*args++ = regs->a6;
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case 3:
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if (!n--)
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break;
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*args++ = regs->b6;
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case 4:
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if (!n--)
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break;
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*args++ = regs->a8;
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case 5:
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if (!n--)
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break;
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*args++ = regs->b8;
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case 6:
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if (!n--)
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break;
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default:
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BUG();
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}
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}
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static inline void syscall_set_arguments(struct task_struct *task,
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struct pt_regs *regs,
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unsigned int i, unsigned int n,
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const unsigned long *args)
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{
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switch (i) {
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case 0:
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if (!n--)
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break;
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regs->a4 = *args++;
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case 1:
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if (!n--)
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break;
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regs->b4 = *args++;
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case 2:
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if (!n--)
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break;
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regs->a6 = *args++;
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case 3:
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if (!n--)
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break;
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regs->b6 = *args++;
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case 4:
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if (!n--)
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break;
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regs->a8 = *args++;
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case 5:
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if (!n--)
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break;
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regs->a9 = *args++;
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case 6:
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if (!n)
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break;
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default:
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BUG();
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}
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}
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#endif /* __ASM_C6X_SYSCALLS_H */
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