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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>
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Michal Simek
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Sep 21, 2009
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| #ifndef __ASM_MICROBLAZE_SYSCALL_H | ||
| #define __ASM_MICROBLAZE_SYSCALL_H | ||
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| #include <linux/kernel.h> | ||
| #include <linux/sched.h> | ||
| #include <asm/ptrace.h> | ||
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| /* 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; | ||
| } | ||
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| static inline void syscall_rollback(struct task_struct *task, | ||
| struct pt_regs *regs) | ||
| { | ||
| /* TODO. */ | ||
| } | ||
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| static inline long syscall_get_error(struct task_struct *task, | ||
| struct pt_regs *regs) | ||
| { | ||
| return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0; | ||
| } | ||
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| static inline long syscall_get_return_value(struct task_struct *task, | ||
| struct pt_regs *regs) | ||
| { | ||
| return regs->r3; | ||
| } | ||
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| 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; | ||
| } | ||
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| 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; | ||
| } | ||
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| 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(); | ||
| } | ||
| } | ||
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| 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++); | ||
| } | ||
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| 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++); | ||
| } | ||
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| #endif /* __ASM_MICROBLAZE_SYSCALL_H */ |