From 09abb90107202d3b18cf5a69076a1d05d11244e6 Mon Sep 17 00:00:00 2001 From: Jonas Bonn Date: Sat, 4 Jun 2011 22:26:51 +0300 Subject: OpenRISC: System calls The OpenRISC Linux kernel conforms to the "generic" syscall interface which contains only the reduced set of syscalls deemed necessary for new architectures. Unfortunately, the uClibc port for OpenRISC does not fully support this reduced set; as such, an additional patch available out-of-tree needs to be applied to the kernel in order to use the current uClibc. This is just a temporary measure until the libc port can be straightened out; it is likely that OpenRISC will make the transition to glibc shortly where the generic syscall interface is better supported. Signed-off-by: Jonas Bonn Reviewed-by: Arnd Bergmann --- arch/openrisc/include/asm/syscall.h | 77 ++++++++++++++++++++++++++++++++++++ arch/openrisc/include/asm/syscalls.h | 27 +++++++++++++ arch/openrisc/include/asm/unistd.h | 31 +++++++++++++++ 3 files changed, 135 insertions(+) create mode 100644 arch/openrisc/include/asm/syscall.h create mode 100644 arch/openrisc/include/asm/syscalls.h create mode 100644 arch/openrisc/include/asm/unistd.h (limited to 'arch/openrisc/include/asm') diff --git a/arch/openrisc/include/asm/syscall.h b/arch/openrisc/include/asm/syscall.h new file mode 100644 index 000000000000..9f0337055d26 --- /dev/null +++ b/arch/openrisc/include/asm/syscall.h @@ -0,0 +1,77 @@ +/* + * OpenRISC Linux + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * OpenRISC implementation: + * Copyright (C) 2003 Matjaz Breskvar + * Copyright (C) 2010-2011 Jonas Bonn + * et al. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __ASM_OPENRISC_SYSCALL_H__ +#define __ASM_OPENRISC_SYSCALL_H__ + +#include +#include + +static inline int +syscall_get_nr(struct task_struct *task, struct pt_regs *regs) +{ + return regs->syscallno ? regs->syscallno : -1; +} + +static inline void +syscall_rollback(struct task_struct *task, struct pt_regs *regs) +{ + regs->gpr[11] = regs->orig_gpr11; +} + +static inline long +syscall_get_error(struct task_struct *task, struct pt_regs *regs) +{ + return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0; +} + +static inline long +syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) +{ + return regs->gpr[11]; +} + +static inline void +syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, + int error, long val) +{ + if (error) + regs->gpr[11] = -error; + else + regs->gpr[11] = val; +} + +static inline void +syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, + unsigned int i, unsigned int n, unsigned long *args) +{ + BUG_ON(i + n > 6); + + memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0])); +} + +static inline void +syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, + unsigned int i, unsigned int n, const unsigned long *args) +{ + BUG_ON(i + n > 6); + + memcpy(®s->gpr[3 + i], args, n * sizeof(args[0])); +} + +#endif diff --git a/arch/openrisc/include/asm/syscalls.h b/arch/openrisc/include/asm/syscalls.h new file mode 100644 index 000000000000..84a978af44d7 --- /dev/null +++ b/arch/openrisc/include/asm/syscalls.h @@ -0,0 +1,27 @@ +/* + * OpenRISC Linux + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * OpenRISC implementation: + * Copyright (C) 2003 Matjaz Breskvar + * Copyright (C) 2010-2011 Jonas Bonn + * et al. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __ASM_OPENRISC_SYSCALLS_H +#define __ASM_OPENRISC_SYSCALLS_H + +asmlinkage long sys_or1k_atomic(unsigned long type, unsigned long *v1, + unsigned long *v2); + +#include + +#endif /* __ASM_OPENRISC_SYSCALLS_H */ diff --git a/arch/openrisc/include/asm/unistd.h b/arch/openrisc/include/asm/unistd.h new file mode 100644 index 000000000000..89af3ab5c2e9 --- /dev/null +++ b/arch/openrisc/include/asm/unistd.h @@ -0,0 +1,31 @@ +/* + * OpenRISC Linux + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * OpenRISC implementation: + * Copyright (C) 2003 Matjaz Breskvar + * Copyright (C) 2010-2011 Jonas Bonn + * et al. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#if !defined(__ASM_OPENRISC_UNISTD_H) || defined(__SYSCALL) +#define __ASM_OPENRISC_UNISTD_H + +#define __ARCH_HAVE_MMU + +#define sys_mmap2 sys_mmap_pgoff + +#include + +#define __NR_or1k_atomic __NR_arch_specific_syscall +__SYSCALL(__NR_or1k_atomic, sys_or1k_atomic) + +#endif /* __ASM_OPENRISC_UNISTD_H */ -- cgit v1.2.3