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Diffstat (limited to 'arch/c6x/kernel/entry.S')
-rw-r--r-- | arch/c6x/kernel/entry.S | 776 |
1 files changed, 776 insertions, 0 deletions
diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S new file mode 100644 index 00000000..30b37e5f --- /dev/null +++ b/arch/c6x/kernel/entry.S @@ -0,0 +1,776 @@ +; +; 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: + 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) + + ;; + ;; 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) + + ;; kernel_execve +ENTRY(kernel_execve) + MVK .S2 __NR_execve,B0 + SWE + BNOP .S2 B3,5 +ENDPROC(kernel_execve) + + ;; + ;; 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_execve) + ADDAW .D2 SP,2,B6 ; put regs addr in 4th parameter + ; & adjust regs stack addr + LDW .D2T2 *+SP(REGS_B4+8),B4 + + ;; c6x_execve(char *name, char **argv, + ;; char **envp, struct pt_regs *regs) +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 sys_c6x_execve,A0 + MVKH .S1 sys_c6x_execve,A0 + B .S2X A0 +#else + || B .S2 sys_c6x_execve +#endif + STW .D2T2 B3,*SP--[2] + ADDKPC .S2 ret_from_c6x_execve,B3,3 + +ret_from_c6x_execve: + LDW .D2T2 *++SP[2],B3 + NOP 4 + BNOP .S2 B3,5 +ENDPROC(sys_execve) + +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 |