1#ifndef __ASM_MICROBLAZE_SYSCALL_H 2#define __ASM_MICROBLAZE_SYSCALL_H 3 4#include <linux/kernel.h> 5#include <linux/sched.h> 6#include <asm/ptrace.h> 7 8/* The system call number is given by the user in R12 */ 9static inline long syscall_get_nr(struct task_struct *task, 10 struct pt_regs *regs) 11{ 12 return regs->r12; 13} 14 15static inline void syscall_rollback(struct task_struct *task, 16 struct pt_regs *regs) 17{ 18 /* TODO. */ 19} 20 21static inline long syscall_get_error(struct task_struct *task, 22 struct pt_regs *regs) 23{ 24 return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0; 25} 26 27static inline long syscall_get_return_value(struct task_struct *task, 28 struct pt_regs *regs) 29{ 30 return regs->r3; 31} 32 33static inline void syscall_set_return_value(struct task_struct *task, 34 struct pt_regs *regs, 35 int error, long val) 36{ 37 if (error) 38 regs->r3 = -error; 39 else 40 regs->r3 = val; 41} 42 43static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs, 44 unsigned int n) 45{ 46 switch (n) { 47 case 5: return regs->r10; 48 case 4: return regs->r9; 49 case 3: return regs->r8; 50 case 2: return regs->r7; 51 case 1: return regs->r6; 52 case 0: return regs->r5; 53 default: 54 BUG(); 55 } 56 return ~0; 57} 58 59static inline void microblaze_set_syscall_arg(struct pt_regs *regs, 60 unsigned int n, 61 unsigned long val) 62{ 63 switch (n) { 64 case 5: 65 regs->r10 = val; 66 case 4: 67 regs->r9 = val; 68 case 3: 69 regs->r8 = val; 70 case 2: 71 regs->r7 = val; 72 case 1: 73 regs->r6 = val; 74 case 0: 75 regs->r5 = val; 76 default: 77 BUG(); 78 } 79} 80 81static inline void syscall_get_arguments(struct task_struct *task, 82 struct pt_regs *regs, 83 unsigned int i, unsigned int n, 84 unsigned long *args) 85{ 86 while (n--) 87 *args++ = microblaze_get_syscall_arg(regs, i++); 88} 89 90static inline void syscall_set_arguments(struct task_struct *task, 91 struct pt_regs *regs, 92 unsigned int i, unsigned int n, 93 const unsigned long *args) 94{ 95 while (n--) 96 microblaze_set_syscall_arg(regs, i++, *args++); 97} 98 99#endif /* __ASM_MICROBLAZE_SYSCALL_H */ 100