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