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9d34340ebd
linux/arch/c6x/kernel/entry.S
Mark Salter 9d34340ebd c6x: run do_notify_resume with interrupts enabled 
C6x was mistakenly running do_notify_resume with interrupts disabled.
This would triggerlead to a warning in local_bh_enable() because interrupts
were disabled:

------------[ cut here ]------------
WARNING: at /es/linux/linux-next/kernel/softirq.c:160 local_bh_enable+0x5c/0x10c()
Modules linked in:

             e02f384d e002cda8 e02f3469 e02f384d 000000a0 e00363fc e01cce58 e5005c00
             e0327986 00000000 e63c0aec 00000164 e00363fc 00000000 fffffffe e5005c00
             e61fde00 e0268184 00000134 e01c91dc 00000001 fffffffe 00000000 10000100
             e01c80e4 e5005c00 00000000 00000000 00000000 e63c0aec e526ce00 10000100
             e628f920 e63c0a88 e6010410 e6449750 e5005c20 00000000 00000000 e63c0a80
             e5005c20 e01c8590 e63c0a80 e5005c20 e63c0aec e00a0554 e009c758 e639e860
 irq_spurious_proc_fops+0x6ad/0x3438
 warn_slowpath_common+0x8c/0xb8
 irq_spurious_proc_fops+0x2c9/0x3438
 irq_spurious_proc_fops+0x6ad/0x3438
 local_bh_enable+0x5c/0x10c
 sk_alloc+0x34/0xa4
 local_bh_enable+0x5c/0x10c
 unix_release_sock+0x5c/0x2a0
 sys_connect+0x94/0xd4
 sock_release+0x38/0x104
 sock_close+0x3c/0x54
 __fput+0x154/0x2ec
 filp_close+0xc0/0xe4
 task_work_run+0xdc/0x12c
 sys_close+0x2c/0x74
 resume_userspace+0x0/0x30
---[ end trace a70cbd610ae1f6b4 ]---

This patch enables interrupts before calling do_notify_resume().

Signed-off-by: Mark Salter <msalter@redhat.com>
2012-11-26 18:06:13 -05:00

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;
; Port on Texas Instruments TMS320C6x architecture
;
; Copyright (C) 2004-2011 Texas Instruments Incorporated
; Author: Aurelien Jacquiot (aurelien.jacquiot@virtuallogix.com)
; Updated for 2.6.34: Mark Salter <msalter@redhat.com>
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License version 2 as
; published by the Free Software Foundation.
;
#include <linux/sys.h>
#include <linux/linkage.h>
#include <asm/thread_info.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
#include <asm/errno.h>
; Registers naming
#define DP B14
#define SP B15
#ifndef CONFIG_PREEMPT
#define resume_kernel restore_all
#endif
.altmacro
.macro MASK_INT reg
MVC .S2 CSR,reg
CLR .S2 reg,0,0,reg
MVC .S2 reg,CSR
.endm
.macro UNMASK_INT reg
MVC .S2 CSR,reg
SET .S2 reg,0,0,reg
MVC .S2 reg,CSR
.endm
.macro GET_THREAD_INFO reg
SHR .S1X SP,THREAD_SHIFT,reg
SHL .S1 reg,THREAD_SHIFT,reg
.endm
;;
;; This defines the normal kernel pt_regs layout.
;;
.macro SAVE_ALL __rp __tsr
STW .D2T2 B0,*SP--[2] ; save original B0
MVKL .S2 current_ksp,B0
MVKH .S2 current_ksp,B0
LDW .D2T2 *B0,B1 ; KSP
NOP 3
STW .D2T2 B1,*+SP[1] ; save original B1
XOR .D2 SP,B1,B0 ; (SP ^ KSP)
LDW .D2T2 *+SP[1],B1 ; restore B0/B1
LDW .D2T2 *++SP[2],B0
SHR .S2 B0,THREAD_SHIFT,B0 ; 0 if already using kstack
[B0] STDW .D2T2 SP:DP,*--B1[1] ; user: save user sp/dp kstack
[B0] MV .S2 B1,SP ; and switch to kstack
||[!B0] STDW .D2T2 SP:DP,*--SP[1] ; kernel: save on current stack
SUBAW .D2 SP,2,SP
ADD .D1X SP,-8,A15
|| STDW .D2T1 A15:A14,*SP--[16] ; save A15:A14
STDW .D2T2 B13:B12,*SP--[1]
|| STDW .D1T1 A13:A12,*A15--[1]
|| MVC .S2 __rp,B13
STDW .D2T2 B11:B10,*SP--[1]
|| STDW .D1T1 A11:A10,*A15--[1]
|| MVC .S2 CSR,B12
STDW .D2T2 B9:B8,*SP--[1]
|| STDW .D1T1 A9:A8,*A15--[1]
|| MVC .S2 RILC,B11
STDW .D2T2 B7:B6,*SP--[1]
|| STDW .D1T1 A7:A6,*A15--[1]
|| MVC .S2 ILC,B10
STDW .D2T2 B5:B4,*SP--[1]
|| STDW .D1T1 A5:A4,*A15--[1]
STDW .D2T2 B3:B2,*SP--[1]
|| STDW .D1T1 A3:A2,*A15--[1]
|| MVC .S2 __tsr,B5
STDW .D2T2 B1:B0,*SP--[1]
|| STDW .D1T1 A1:A0,*A15--[1]
|| MV .S1X B5,A5
STDW .D2T2 B31:B30,*SP--[1]
|| STDW .D1T1 A31:A30,*A15--[1]
STDW .D2T2 B29:B28,*SP--[1]
|| STDW .D1T1 A29:A28,*A15--[1]
STDW .D2T2 B27:B26,*SP--[1]
|| STDW .D1T1 A27:A26,*A15--[1]
STDW .D2T2 B25:B24,*SP--[1]
|| STDW .D1T1 A25:A24,*A15--[1]
STDW .D2T2 B23:B22,*SP--[1]
|| STDW .D1T1 A23:A22,*A15--[1]
STDW .D2T2 B21:B20,*SP--[1]
|| STDW .D1T1 A21:A20,*A15--[1]
STDW .D2T2 B19:B18,*SP--[1]
|| STDW .D1T1 A19:A18,*A15--[1]
STDW .D2T2 B17:B16,*SP--[1]
|| STDW .D1T1 A17:A16,*A15--[1]
STDW .D2T2 B13:B12,*SP--[1] ; save PC and CSR
STDW .D2T2 B11:B10,*SP--[1] ; save RILC and ILC
STDW .D2T1 A5:A4,*SP--[1] ; save TSR and orig A4
;; We left an unused word on the stack just above pt_regs.
;; It is used to save whether or not this frame is due to
;; a syscall. It is cleared here, but the syscall handler
;; sets it to a non-zero value.
MVK .L2 0,B1
STW .D2T2 B1,*+SP(REGS__END+8) ; clear syscall flag
.endm
.macro RESTORE_ALL __rp __tsr
LDDW .D2T2 *++SP[1],B9:B8 ; get TSR (B9)
LDDW .D2T2 *++SP[1],B11:B10 ; get RILC (B11) and ILC (B10)
LDDW .D2T2 *++SP[1],B13:B12 ; get PC (B13) and CSR (B12)
ADDAW .D1X SP,30,A15
LDDW .D1T1 *++A15[1],A17:A16
|| LDDW .D2T2 *++SP[1],B17:B16
LDDW .D1T1 *++A15[1],A19:A18
|| LDDW .D2T2 *++SP[1],B19:B18
LDDW .D1T1 *++A15[1],A21:A20
|| LDDW .D2T2 *++SP[1],B21:B20
LDDW .D1T1 *++A15[1],A23:A22
|| LDDW .D2T2 *++SP[1],B23:B22
LDDW .D1T1 *++A15[1],A25:A24
|| LDDW .D2T2 *++SP[1],B25:B24
LDDW .D1T1 *++A15[1],A27:A26
|| LDDW .D2T2 *++SP[1],B27:B26
LDDW .D1T1 *++A15[1],A29:A28
|| LDDW .D2T2 *++SP[1],B29:B28
LDDW .D1T1 *++A15[1],A31:A30
|| LDDW .D2T2 *++SP[1],B31:B30
LDDW .D1T1 *++A15[1],A1:A0
|| LDDW .D2T2 *++SP[1],B1:B0
LDDW .D1T1 *++A15[1],A3:A2
|| LDDW .D2T2 *++SP[1],B3:B2
|| MVC .S2 B9,__tsr
LDDW .D1T1 *++A15[1],A5:A4
|| LDDW .D2T2 *++SP[1],B5:B4
|| MVC .S2 B11,RILC
LDDW .D1T1 *++A15[1],A7:A6
|| LDDW .D2T2 *++SP[1],B7:B6
|| MVC .S2 B10,ILC
LDDW .D1T1 *++A15[1],A9:A8
|| LDDW .D2T2 *++SP[1],B9:B8
|| MVC .S2 B13,__rp
LDDW .D1T1 *++A15[1],A11:A10
|| LDDW .D2T2 *++SP[1],B11:B10
|| MVC .S2 B12,CSR
LDDW .D1T1 *++A15[1],A13:A12
|| LDDW .D2T2 *++SP[1],B13:B12
MV .D2X A15,SP
|| MVKL .S1 current_ksp,A15
MVKH .S1 current_ksp,A15
|| ADDAW .D1X SP,6,A14
STW .D1T1 A14,*A15 ; save kernel stack pointer
LDDW .D2T1 *++SP[1],A15:A14
B .S2 __rp ; return from interruption
LDDW .D2T2 *+SP[1],SP:DP
NOP 4
.endm
.section .text
;;
;; Jump to schedule() then return to ret_from_exception
;;
_reschedule:
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 schedule,A0
MVKH .S1 schedule,A0
B .S2X A0
#else
B .S1 schedule
#endif
ADDKPC .S2 ret_from_exception,B3,4
;;
;; Called before syscall handler when process is being debugged
;;
tracesys_on:
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 syscall_trace_entry,A0
MVKH .S1 syscall_trace_entry,A0
B .S2X A0
#else
B .S1 syscall_trace_entry
#endif
ADDKPC .S2 ret_from_syscall_trace,B3,3
ADD .S1X 8,SP,A4
ret_from_syscall_trace:
;; tracing returns (possibly new) syscall number
MV .D2X A4,B0
|| MVK .S2 __NR_syscalls,B1
CMPLTU .L2 B0,B1,B1
[!B1] BNOP .S2 ret_from_syscall_function,5
|| MVK .S1 -ENOSYS,A4
;; reload syscall args from (possibly modified) stack frame
;; and get syscall handler addr from sys_call_table:
LDW .D2T2 *+SP(REGS_B4+8),B4
|| MVKL .S2 sys_call_table,B1
LDW .D2T1 *+SP(REGS_A6+8),A6
|| MVKH .S2 sys_call_table,B1
LDW .D2T2 *+B1[B0],B0
|| MVKL .S2 ret_from_syscall_function,B3
LDW .D2T2 *+SP(REGS_B6+8),B6
|| MVKH .S2 ret_from_syscall_function,B3
LDW .D2T1 *+SP(REGS_A8+8),A8
LDW .D2T2 *+SP(REGS_B8+8),B8
NOP
; B0 = sys_call_table[__NR_*]
BNOP .S2 B0,5 ; branch to syscall handler
|| LDW .D2T1 *+SP(REGS_ORIG_A4+8),A4
syscall_exit_work:
AND .D1 _TIF_SYSCALL_TRACE,A2,A0
[!A0] BNOP .S1 work_pending,5
[A0] B .S2 syscall_trace_exit
ADDKPC .S2 resume_userspace,B3,1
MVC .S2 CSR,B1
SET .S2 B1,0,0,B1
MVC .S2 B1,CSR ; enable ints
work_pending:
AND .D1 _TIF_NEED_RESCHED,A2,A0
[!A0] BNOP .S1 work_notifysig,5
work_resched:
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 schedule,A1
MVKH .S1 schedule,A1
B .S2X A1
#else
B .S2 schedule
#endif
ADDKPC .S2 work_rescheduled,B3,4
work_rescheduled:
;; make sure we don't miss an interrupt setting need_resched or
;; sigpending between sampling and the rti
MASK_INT B2
GET_THREAD_INFO A12
LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
MVK .S1 _TIF_WORK_MASK,A1
MVK .S1 _TIF_NEED_RESCHED,A3
NOP 2
AND .D1 A1,A2,A0
|| AND .S1 A3,A2,A1
[!A0] BNOP .S1 restore_all,5
[A1] BNOP .S1 work_resched,5
work_notifysig:
;; enable interrupts for do_notify_resume()
UNMASK_INT B2
B .S2 do_notify_resume
LDW .D2T1 *+SP(REGS__END+8),A6 ; syscall flag
ADDKPC .S2 resume_userspace,B3,1
ADD .S1X 8,SP,A4 ; pt_regs pointer is first arg
MV .D2X A2,B4 ; thread_info flags is second arg
;;
;; On C64x+, the return way from exception and interrupt
;; is a little bit different
;;
ENTRY(ret_from_exception)
#ifdef CONFIG_PREEMPT
MASK_INT B2
#endif
ENTRY(ret_from_interrupt)
;;
;; Check if we are comming from user mode.
;;
LDW .D2T2 *+SP(REGS_TSR+8),B0
MVK .S2 0x40,B1
NOP 3
AND .D2 B0,B1,B0
[!B0] BNOP .S2 resume_kernel,5
resume_userspace:
;; make sure we don't miss an interrupt setting need_resched or
;; sigpending between sampling and the rti
MASK_INT B2
GET_THREAD_INFO A12
LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
MVK .S1 _TIF_WORK_MASK,A1
MVK .S1 _TIF_NEED_RESCHED,A3
NOP 2
AND .D1 A1,A2,A0
[A0] BNOP .S1 work_pending,5
BNOP .S1 restore_all,5
;;
;; System call handling
;; B0 = syscall number (in sys_call_table)
;; A4,B4,A6,B6,A8,B8 = arguments of the syscall function
;; A4 is the return value register
;;
system_call_saved:
MVK .L2 1,B2
STW .D2T2 B2,*+SP(REGS__END+8) ; set syscall flag
MVC .S2 B2,ECR ; ack the software exception
UNMASK_INT B2 ; re-enable global IT
system_call_saved_noack:
;; Check system call number
MVK .S2 __NR_syscalls,B1
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKL .S1 sys_ni_syscall,A0
#endif
CMPLTU .L2 B0,B1,B1
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKH .S1 sys_ni_syscall,A0
#endif
;; Check for ptrace
GET_THREAD_INFO A12
#ifdef CONFIG_C6X_BIG_KERNEL
[!B1] B .S2X A0
#else
[!B1] B .S2 sys_ni_syscall
#endif
[!B1] ADDKPC .S2 ret_from_syscall_function,B3,4
;; Get syscall handler addr from sys_call_table
;; call tracesys_on or call syscall handler
LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
|| MVKL .S2 sys_call_table,B1
MVKH .S2 sys_call_table,B1
LDW .D2T2 *+B1[B0],B0
NOP 2
; A2 = thread_info flags
AND .D1 _TIF_SYSCALL_TRACE,A2,A2
[A2] BNOP .S1 tracesys_on,5
;; B0 = _sys_call_table[__NR_*]
B .S2 B0
ADDKPC .S2 ret_from_syscall_function,B3,4
ret_from_syscall_function:
STW .D2T1 A4,*+SP(REGS_A4+8) ; save return value in A4
; original A4 is in orig_A4
syscall_exit:
;; make sure we don't miss an interrupt setting need_resched or
;; sigpending between sampling and the rti
MASK_INT B2
LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
MVK .S1 _TIF_ALLWORK_MASK,A1
NOP 3
AND .D1 A1,A2,A2 ; check for work to do
[A2] BNOP .S1 syscall_exit_work,5
restore_all:
RESTORE_ALL NRP,NTSR
;;
;; After a fork we jump here directly from resume,
;; so that A4 contains the previous task structure.
;;
ENTRY(ret_from_fork)
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 schedule_tail,A0
MVKH .S1 schedule_tail,A0
B .S2X A0
#else
B .S2 schedule_tail
#endif
ADDKPC .S2 ret_from_fork_2,B3,4
ret_from_fork_2:
;; return 0 in A4 for child process
GET_THREAD_INFO A12
BNOP .S2 syscall_exit,3
MVK .L2 0,B0
STW .D2T2 B0,*+SP(REGS_A4+8)
ENDPROC(ret_from_fork)
ENTRY(ret_from_kernel_thread)
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 schedule_tail,A0
MVKH .S1 schedule_tail,A0
B .S2X A0
#else
B .S2 schedule_tail
#endif
LDW .D2T2 *+SP(REGS_A0+8),B10 /* get fn */
ADDKPC .S2 0f,B3,3
0:
B .S2 B10 /* call fn */
LDW .D2T1 *+SP(REGS_A1+8),A4 /* get arg */
MVKL .S2 sys_exit,B11
MVKH .S2 sys_exit,B11
ADDKPC .S2 0f,B3,1
0:
BNOP .S2 B11,5 /* jump to sys_exit */
ENDPROC(ret_from_kernel_thread)
ENTRY(ret_from_kernel_execve)
GET_THREAD_INFO A12
BNOP .S2 syscall_exit,4
ADD .D2X A4,-8,SP
ENDPROC(ret_from_kernel_execve)
;;
;; These are the interrupt handlers, responsible for calling __do_IRQ()
;; int6 is used for syscalls (see _system_call entry)
;;
.macro SAVE_ALL_INT
SAVE_ALL IRP,ITSR
.endm
.macro CALL_INT int
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 c6x_do_IRQ,A0
MVKH .S1 c6x_do_IRQ,A0
BNOP .S2X A0,1
MVK .S1 int,A4
ADDAW .D2 SP,2,B4
MVKL .S2 ret_from_interrupt,B3
MVKH .S2 ret_from_interrupt,B3
#else
CALLP .S2 c6x_do_IRQ,B3
|| MVK .S1 int,A4
|| ADDAW .D2 SP,2,B4
B .S1 ret_from_interrupt
NOP 5
#endif
.endm
ENTRY(_int4_handler)
SAVE_ALL_INT
CALL_INT 4
ENDPROC(_int4_handler)
ENTRY(_int5_handler)
SAVE_ALL_INT
CALL_INT 5
ENDPROC(_int5_handler)
ENTRY(_int6_handler)
SAVE_ALL_INT
CALL_INT 6
ENDPROC(_int6_handler)
ENTRY(_int7_handler)
SAVE_ALL_INT
CALL_INT 7
ENDPROC(_int7_handler)
ENTRY(_int8_handler)
SAVE_ALL_INT
CALL_INT 8
ENDPROC(_int8_handler)
ENTRY(_int9_handler)
SAVE_ALL_INT
CALL_INT 9
ENDPROC(_int9_handler)
ENTRY(_int10_handler)
SAVE_ALL_INT
CALL_INT 10
ENDPROC(_int10_handler)
ENTRY(_int11_handler)
SAVE_ALL_INT
CALL_INT 11
ENDPROC(_int11_handler)
ENTRY(_int12_handler)
SAVE_ALL_INT
CALL_INT 12
ENDPROC(_int12_handler)
ENTRY(_int13_handler)
SAVE_ALL_INT
CALL_INT 13
ENDPROC(_int13_handler)
ENTRY(_int14_handler)
SAVE_ALL_INT
CALL_INT 14
ENDPROC(_int14_handler)
ENTRY(_int15_handler)
SAVE_ALL_INT
CALL_INT 15
ENDPROC(_int15_handler)
;;
;; Handler for uninitialized and spurious interrupts
;;
ENTRY(_bad_interrupt)
B .S2 IRP
NOP 5
ENDPROC(_bad_interrupt)
;;
;; Entry for NMI/exceptions/syscall
;;
ENTRY(_nmi_handler)
SAVE_ALL NRP,NTSR
MVC .S2 EFR,B2
CMPEQ .L2 1,B2,B2
|| MVC .S2 TSR,B1
CLR .S2 B1,10,10,B1
MVC .S2 B1,TSR
#ifdef CONFIG_C6X_BIG_KERNEL
[!B2] MVKL .S1 process_exception,A0
[!B2] MVKH .S1 process_exception,A0
[!B2] B .S2X A0
#else
[!B2] B .S2 process_exception
#endif
[B2] B .S2 system_call_saved
[!B2] ADDAW .D2 SP,2,B1
[!B2] MV .D1X B1,A4
ADDKPC .S2 ret_from_trap,B3,2
ret_from_trap:
MV .D2X A4,B0
[!B0] BNOP .S2 ret_from_exception,5
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S2 system_call_saved_noack,B3
MVKH .S2 system_call_saved_noack,B3
#endif
LDW .D2T2 *+SP(REGS_B0+8),B0
LDW .D2T1 *+SP(REGS_A4+8),A4
LDW .D2T2 *+SP(REGS_B4+8),B4
LDW .D2T1 *+SP(REGS_A6+8),A6
LDW .D2T2 *+SP(REGS_B6+8),B6
LDW .D2T1 *+SP(REGS_A8+8),A8
#ifdef CONFIG_C6X_BIG_KERNEL
|| B .S2 B3
#else
|| B .S2 system_call_saved_noack
#endif
LDW .D2T2 *+SP(REGS_B8+8),B8
NOP 4
ENDPROC(_nmi_handler)
;;
;; Jump to schedule() then return to ret_from_isr
;;
#ifdef CONFIG_PREEMPT
resume_kernel:
GET_THREAD_INFO A12
LDW .D1T1 *+A12(THREAD_INFO_PREEMPT_COUNT),A1
NOP 4
[A1] BNOP .S2 restore_all,5
preempt_schedule:
GET_THREAD_INFO A2
LDW .D1T1 *+A2(THREAD_INFO_FLAGS),A1
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S2 preempt_schedule_irq,B0
MVKH .S2 preempt_schedule_irq,B0
NOP 2
#else
NOP 4
#endif
AND .D1 _TIF_NEED_RESCHED,A1,A1
[!A1] BNOP .S2 restore_all,5
#ifdef CONFIG_C6X_BIG_KERNEL
B .S2 B0
#else
B .S2 preempt_schedule_irq
#endif
ADDKPC .S2 preempt_schedule,B3,4
#endif /* CONFIG_PREEMPT */
ENTRY(enable_exception)
DINT
MVC .S2 TSR,B0
MVC .S2 B3,NRP
MVK .L2 0xc,B1
OR .D2 B0,B1,B0
MVC .S2 B0,TSR ; Set GEE and XEN in TSR
B .S2 NRP
NOP 5
ENDPROC(enable_exception)
ENTRY(sys_sigaltstack)
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 do_sigaltstack,A0 ; branch to do_sigaltstack
MVKH .S1 do_sigaltstack,A0
B .S2X A0
#else
B .S2 do_sigaltstack
#endif
LDW .D2T1 *+SP(REGS_SP+8),A6
NOP 4
ENDPROC(sys_sigaltstack)
;;
;; Special system calls
;; return address is in B3
;;
ENTRY(sys_clone)
ADD .D1X SP,8,A4
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKL .S1 sys_c6x_clone,A0
MVKH .S1 sys_c6x_clone,A0
BNOP .S2X A0,5
#else
|| B .S2 sys_c6x_clone
NOP 5
#endif
ENDPROC(sys_clone)
ENTRY(sys_rt_sigreturn)
ADD .D1X SP,8,A4
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKL .S1 do_rt_sigreturn,A0
MVKH .S1 do_rt_sigreturn,A0
BNOP .S2X A0,5
#else
|| B .S2 do_rt_sigreturn
NOP 5
#endif
ENDPROC(sys_rt_sigreturn)
ENTRY(sys_pread_c6x)
MV .D2X A8,B7
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKL .S1 sys_pread64,A0
MVKH .S1 sys_pread64,A0
BNOP .S2X A0,5
#else
|| B .S2 sys_pread64
NOP 5
#endif
ENDPROC(sys_pread_c6x)
ENTRY(sys_pwrite_c6x)
MV .D2X A8,B7
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKL .S1 sys_pwrite64,A0
MVKH .S1 sys_pwrite64,A0
BNOP .S2X A0,5
#else
|| B .S2 sys_pwrite64
NOP 5
#endif
ENDPROC(sys_pwrite_c6x)
;; On Entry
;; A4 - path
;; B4 - offset_lo (LE), offset_hi (BE)
;; A6 - offset_lo (BE), offset_hi (LE)
ENTRY(sys_truncate64_c6x)
#ifdef CONFIG_CPU_BIG_ENDIAN
MV .S2 B4,B5
MV .D2X A6,B4
#else
MV .D2X A6,B5
#endif
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKL .S1 sys_truncate64,A0
MVKH .S1 sys_truncate64,A0
BNOP .S2X A0,5
#else
|| B .S2 sys_truncate64
NOP 5
#endif
ENDPROC(sys_truncate64_c6x)
;; On Entry
;; A4 - fd
;; B4 - offset_lo (LE), offset_hi (BE)
;; A6 - offset_lo (BE), offset_hi (LE)
ENTRY(sys_ftruncate64_c6x)
#ifdef CONFIG_CPU_BIG_ENDIAN
MV .S2 B4,B5
MV .D2X A6,B4
#else
MV .D2X A6,B5
#endif
#ifdef CONFIG_C6X_BIG_KERNEL
|| MVKL .S1 sys_ftruncate64,A0
MVKH .S1 sys_ftruncate64,A0
BNOP .S2X A0,5
#else
|| B .S2 sys_ftruncate64
NOP 5
#endif
ENDPROC(sys_ftruncate64_c6x)
;; On Entry
;; A4 - fd
;; B4 - offset_lo (LE), offset_hi (BE)
;; A6 - offset_lo (BE), offset_hi (LE)
;; B6 - len_lo (LE), len_hi (BE)
;; A8 - len_lo (BE), len_hi (LE)
;; B8 - advice
ENTRY(sys_fadvise64_64_c6x)
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 sys_fadvise64_64,A0
MVKH .S1 sys_fadvise64_64,A0
BNOP .S2X A0,2
#else
B .S2 sys_fadvise64_64
NOP 2
#endif
#ifdef CONFIG_CPU_BIG_ENDIAN
MV .L2 B4,B5
|| MV .D2X A6,B4
MV .L1 A8,A6
|| MV .D1X B6,A7
#else
MV .D2X A6,B5
MV .L1 A8,A7
|| MV .D1X B6,A6
#endif
MV .L2 B8,B6
ENDPROC(sys_fadvise64_64_c6x)
;; On Entry
;; A4 - fd
;; B4 - mode
;; A6 - offset_hi
;; B6 - offset_lo
;; A8 - len_hi
;; B8 - len_lo
ENTRY(sys_fallocate_c6x)
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 sys_fallocate,A0
MVKH .S1 sys_fallocate,A0
BNOP .S2X A0,1
#else
B .S2 sys_fallocate
NOP
#endif
MV .D1 A6,A7
MV .D1X B6,A6
MV .D2X A8,B7
MV .D2 B8,B6
ENDPROC(sys_fallocate_c6x)
;; put this in .neardata for faster access when using DSBT mode
.section .neardata,"aw",@progbits
.global current_ksp
.hidden current_ksp
current_ksp:
.word init_thread_union + THREAD_START_SP
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