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microblaze: Implement include/asm/syscall.h. 

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2009-08-24 13:25:16 +02:00
parent 9002062ff5
commit d5b37092aa
1 changed files with 99 additions and 0 deletions
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99
arch/microblaze/include/asm/syscall.h Normal file
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#ifndef __ASM_MICROBLAZE_SYSCALL_H
#define __ASM_MICROBLAZE_SYSCALL_H
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/ptrace.h>
/* The system call number is given by the user in R12 */
static inline long syscall_get_nr(struct task_struct *task,
struct pt_regs *regs)
{
return regs->r12;
}
static inline void syscall_rollback(struct task_struct *task,
struct pt_regs *regs)
{
/* TODO. */
}
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
return regs->r3;
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
if (error)
regs->r3 = -error;
else
regs->r3 = val;
}
static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
unsigned int n)
{
switch (n) {
case 5: return regs->r10;
case 4: return regs->r9;
case 3: return regs->r8;
case 2: return regs->r7;
case 1: return regs->r6;
case 0: return regs->r5;
default:
BUG();
}
return ~0;
}
static inline void microblaze_set_syscall_arg(struct pt_regs *regs,
unsigned int n,
unsigned long val)
{
switch (n) {
case 5:
regs->r10 = val;
case 4:
regs->r9 = val;
case 3:
regs->r8 = val;
case 2:
regs->r7 = val;
case 1:
regs->r6 = val;
case 0:
regs->r5 = val;
default:
BUG();
}
}
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned int i, unsigned int n,
unsigned long *args)
{
while (n--)
*args++ = microblaze_get_syscall_arg(regs, i++);
}
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned int i, unsigned int n,
const unsigned long *args)
{
while (n--)
microblaze_set_syscall_arg(regs, i++, *args++);
}
#endif /* __ASM_MICROBLAZE_SYSCALL_H */