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-rw-r--r--arch/nds32/kernel/ex-scall.S100
1 files changed, 0 insertions, 100 deletions
diff --git a/arch/nds32/kernel/ex-scall.S b/arch/nds32/kernel/ex-scall.S
deleted file mode 100644
index 270050f1b7b1..000000000000
--- a/arch/nds32/kernel/ex-scall.S
+++ /dev/null
@@ -1,100 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/linkage.h>
-#include <asm/unistd.h>
-#include <asm/assembler.h>
-#include <asm/nds32.h>
-#include <asm/asm-offsets.h>
-#include <asm/thread_info.h>
-#include <asm/current.h>
-
-/*
- * $r0 = previous task_struct,
- * $r1 = next task_struct,
- * previous and next are guaranteed not to be the same.
- */
-
-ENTRY(__switch_to)
-
- la $p0, __entry_task
- sw $r1, [$p0]
- addi $p1, $r0, #THREAD_CPU_CONTEXT
- smw.bi $r6, [$p1], $r14, #0xb ! push r6~r14, fp, lp, sp
- move $r25, $r1
-#if defined(CONFIG_FPU)
- call _switch_fpu
-#endif
- addi $r1, $r25, #THREAD_CPU_CONTEXT
- lmw.bi $r6, [$r1], $r14, #0xb ! pop r6~r14, fp, lp, sp
- ret
-
-
-#define tbl $r8
-
-/*
- * $r7 will be writen as syscall nr
- */
- .macro get_scno
- lwi $r7, [$sp + R15_OFFSET]
- swi $r7, [$sp + SYSCALLNO_OFFSET]
- .endm
-
- .macro updateipc
- addi $r17, $r13, #4 ! $r13 is $IPC
- swi $r17, [$sp + IPC_OFFSET]
- .endm
-
-ENTRY(eh_syscall)
- updateipc
-
- get_scno
- gie_enable
-
- lwi $p0, [tsk+#TSK_TI_FLAGS] ! check for syscall tracing
-
- andi $p1, $p0, #_TIF_WORK_SYSCALL_ENTRY ! are we tracing syscalls?
- bnez $p1, __sys_trace
-
- la $lp, ret_fast_syscall ! return address
-jmp_systbl:
- addi $p1, $r7, #-__NR_syscalls ! syscall number of syscall instruction is guarded by addembler
- bgez $p1, _SCNO_EXCEED ! call sys_* routine
- la tbl, sys_call_table ! load syscall table pointer
- slli $p1, $r7, #2
- add $p1, tbl, $p1
- lwi $p1, [$p1]
- jr $p1 ! no return
-
-_SCNO_EXCEED:
- ori $r0, $r7, #0
- ori $r1, $sp, #0
- b bad_syscall
-
-/*
- * This is the really slow path. We're going to be doing
- * context switches, and waiting for our parent to respond.
- */
-__sys_trace:
- move $r0, $sp
- bal syscall_trace_enter
- move $r7, $r0
- la $lp, __sys_trace_return ! return address
-
- addi $p1, $r7, #1
- beqz $p1, ret_slow_syscall ! fatal signal is pending
-
- addi $p1, $sp, #R0_OFFSET ! pointer to regs
- lmw.bi $r0, [$p1], $r5 ! have to reload $r0 - $r5
- b jmp_systbl
-
-__sys_trace_return:
- swi $r0, [$sp+#R0_OFFSET] ! T: save returned $r0
- move $r0, $sp ! set pt_regs for syscall_trace_leave
- bal syscall_trace_leave
- b ret_slow_syscall
-
-ENTRY(sys_rt_sigreturn_wrapper)
- addi $r0, $sp, #0
- b sys_rt_sigreturn
-ENDPROC(sys_rt_sigreturn_wrapper)