diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/metag/include/asm/syscall.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/metag/include/asm/syscall.h')
-rw-r--r-- | kernel/arch/metag/include/asm/syscall.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/kernel/arch/metag/include/asm/syscall.h b/kernel/arch/metag/include/asm/syscall.h new file mode 100644 index 000000000..24fc97939 --- /dev/null +++ b/kernel/arch/metag/include/asm/syscall.h @@ -0,0 +1,104 @@ +/* + * Access to user system call parameters and results + * + * Copyright (C) 2008 Imagination Technologies Ltd. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License v.2. + * + * See asm-generic/syscall.h for descriptions of what we must do here. + */ + +#ifndef _ASM_METAG_SYSCALL_H +#define _ASM_METAG_SYSCALL_H + +#include <linux/sched.h> +#include <linux/err.h> +#include <linux/uaccess.h> + +#include <asm/switch.h> + +static inline long syscall_get_nr(struct task_struct *task, + struct pt_regs *regs) +{ + unsigned long insn; + + /* + * FIXME there's no way to find out how we got here other than to + * examine the memory at the PC to see if it is a syscall + * SWITCH instruction. + */ + if (get_user(insn, (unsigned long *)(regs->ctx.CurrPC - 4))) + return -1; + + if (insn == __METAG_SW_ENCODING(SYS)) + return regs->ctx.DX[0].U1; + else + return -1L; +} + +static inline void syscall_rollback(struct task_struct *task, + struct pt_regs *regs) +{ + /* do nothing */ +} + +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) +{ + unsigned long error = regs->ctx.DX[0].U0; + return IS_ERR_VALUE(error) ? error : 0; +} + +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->ctx.DX[0].U0; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + regs->ctx.DX[0].U0 = (long) error ?: val; +} + +static inline void syscall_get_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + unsigned long *args) +{ + unsigned int reg, j; + BUG_ON(i + n > 6); + + for (j = i, reg = 6 - i; j < (i + n); j++, reg--) { + if (reg % 2) + args[j] = regs->ctx.DX[(reg + 1) / 2].U0; + else + args[j] = regs->ctx.DX[reg / 2].U1; + } +} + +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + const unsigned long *args) +{ + unsigned int reg; + BUG_ON(i + n > 6); + + for (reg = 6 - i; i < (i + n); i++, reg--) { + if (reg % 2) + regs->ctx.DX[(reg + 1) / 2].U0 = args[i]; + else + regs->ctx.DX[reg / 2].U1 = args[i]; + } +} + +#define NR_syscalls __NR_syscalls + +/* generic syscall table */ +extern const void *sys_call_table[]; + +#endif /* _ASM_METAG_SYSCALL_H */ |