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Diffstat (limited to 'arch/score/kernel/entry.S')
| -rw-r--r-- | arch/score/kernel/entry.S | 493 |
1 files changed, 0 insertions, 493 deletions
diff --git a/arch/score/kernel/entry.S b/arch/score/kernel/entry.S deleted file mode 100644 index befb87d30a89..000000000000 --- a/arch/score/kernel/entry.S +++ /dev/null @@ -1,493 +0,0 @@ -/* - * arch/score/kernel/entry.S - * - * Score Processor version. - * - * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. - * Chen Liqin <liqin.chen@sunplusct.com> - * Lennox Wu <lennox.wu@sunplusct.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see the file COPYING, or write - * to the Free Software Foundation, Inc., - * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/err.h> -#include <linux/init.h> -#include <linux/linkage.h> - -#include <asm/asmmacro.h> -#include <asm/thread_info.h> -#include <asm/unistd.h> - -/* - * disable interrupts. - */ -.macro disable_irq - mfcr r8, cr0 - srli r8, r8, 1 - slli r8, r8, 1 - mtcr r8, cr0 - nop - nop - nop - nop - nop -.endm - -/* - * enable interrupts. - */ -.macro enable_irq - mfcr r8, cr0 - ori r8, 1 - mtcr r8, cr0 - nop - nop - nop - nop - nop -.endm - -__INIT -ENTRY(debug_exception_vector) - nop! - nop! - nop! - nop! - nop! - nop! - nop! - nop! - -ENTRY(general_exception_vector) # should move to addr 0x200 - j general_exception - nop! - nop! - nop! - nop! - nop! - nop! - -ENTRY(interrupt_exception_vector) # should move to addr 0x210 - j interrupt_exception - nop! - nop! - nop! - nop! - nop! - nop! - - .section ".text", "ax" - .align 2; -general_exception: - mfcr r31, cr2 - nop - la r30, exception_handlers - andi r31, 0x1f # get ecr.exc_code - slli r31, r31, 2 - add r30, r30, r31 - lw r30, [r30] - br r30 - -interrupt_exception: - SAVE_ALL - mfcr r4, cr2 - nop - lw r16, [r28, TI_REGS] - sw r0, [r28, TI_REGS] - la r3, ret_from_irq - srli r4, r4, 18 # get ecr.ip[7:2], interrupt No. - mv r5, r0 - j do_IRQ - -ENTRY(handle_nmi) # NMI #1 - SAVE_ALL - mv r4, r0 - la r8, nmi_exception_handler - brl r8 - j restore_all - -ENTRY(handle_adelinsn) # AdEL-instruction #2 - SAVE_ALL - mfcr r8, cr6 - nop - nop - sw r8, [r0, PT_EMA] - mv r4, r0 - la r8, do_adelinsn - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_ibe) # BusEL-instruction #5 - SAVE_ALL - mv r4, r0 - la r8, do_be - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_pel) # P-EL #6 - SAVE_ALL - mv r4, r0 - la r8, do_pel - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_ccu) # CCU #8 - SAVE_ALL - mv r4, r0 - la r8, do_ccu - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_ri) # RI #9 - SAVE_ALL - mv r4, r0 - la r8, do_ri - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_tr) # Trap #10 - SAVE_ALL - mv r4, r0 - la r8, do_tr - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_adedata) # AdES-instruction #12 - SAVE_ALL - mfcr r8, cr6 - nop - nop - sw r8, [r0, PT_EMA] - mv r4, r0 - la r8, do_adedata - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_cee) # CeE #16 - SAVE_ALL - mv r4, r0 - la r8, do_cee - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_cpe) # CpE #17 - SAVE_ALL - mv r4, r0 - la r8, do_cpe - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_dbe) # BusEL-data #18 - SAVE_ALL - mv r4, r0 - la r8, do_be - brl r8 - mv r4, r0 - j ret_from_exception - nop - -ENTRY(handle_reserved) # others - SAVE_ALL - mv r4, r0 - la r8, do_reserved - brl r8 - mv r4, r0 - j ret_from_exception - nop - -#ifndef CONFIG_PREEMPT -#define resume_kernel restore_all -#else -#define __ret_from_irq ret_from_exception -#endif - - .align 2 -#ifndef CONFIG_PREEMPT -ENTRY(ret_from_exception) - disable_irq # preempt stop - nop - j __ret_from_irq - nop -#endif - -ENTRY(ret_from_irq) - sw r16, [r28, TI_REGS] - -ENTRY(__ret_from_irq) - lw r8, [r0, PT_PSR] # returning to kernel mode? - andri.c r8, r8, KU_USER - beq resume_kernel - -resume_userspace: - disable_irq - lw r6, [r28, TI_FLAGS] # current->work - li r8, _TIF_WORK_MASK - and.c r8, r8, r6 # ignoring syscall_trace - bne work_pending - nop - j restore_all - nop - -#ifdef CONFIG_PREEMPT -resume_kernel: - disable_irq - lw r8, [r28, TI_PRE_COUNT] - cmpz.c r8 - bne restore_all -need_resched: - lw r8, [r28, TI_FLAGS] - andri.c r9, r8, _TIF_NEED_RESCHED - beq restore_all - lw r8, [r28, PT_PSR] # Interrupts off? - andri.c r8, r8, 1 - beq restore_all - bl preempt_schedule_irq - nop - j need_resched - nop -#endif - -ENTRY(ret_from_kernel_thread) - bl schedule_tail # r4=struct task_struct *prev - nop - mv r4, r13 - brl r12 - j syscall_exit - -ENTRY(ret_from_fork) - bl schedule_tail # r4=struct task_struct *prev - -ENTRY(syscall_exit) - nop - disable_irq - lw r6, [r28, TI_FLAGS] # current->work - li r8, _TIF_WORK_MASK - and.c r8, r6, r8 - bne syscall_exit_work - -ENTRY(restore_all) # restore full frame - RESTORE_ALL_AND_RET - -work_pending: - andri.c r8, r6, _TIF_NEED_RESCHED # r6 is preloaded with TI_FLAGS - beq work_notifysig -work_resched: - bl schedule - nop - disable_irq - lw r6, [r28, TI_FLAGS] - li r8, _TIF_WORK_MASK - and.c r8, r6, r8 # is there any work to be done - # other than syscall tracing? - beq restore_all - andri.c r8, r6, _TIF_NEED_RESCHED - bne work_resched - -work_notifysig: - mv r4, r0 - li r5, 0 - bl do_notify_resume # r6 already loaded - nop - j resume_userspace - nop - -ENTRY(syscall_exit_work) - li r8, _TIF_SYSCALL_TRACE - and.c r8, r8, r6 # r6 is preloaded with TI_FLAGS - beq work_pending # trace bit set? - nop - enable_irq - mv r4, r0 - li r5, 1 - bl do_syscall_trace - nop - b resume_userspace - nop - -.macro save_context reg - sw r12, [\reg, THREAD_REG12]; - sw r13, [\reg, THREAD_REG13]; - sw r14, [\reg, THREAD_REG14]; - sw r15, [\reg, THREAD_REG15]; - sw r16, [\reg, THREAD_REG16]; - sw r17, [\reg, THREAD_REG17]; - sw r18, [\reg, THREAD_REG18]; - sw r19, [\reg, THREAD_REG19]; - sw r20, [\reg, THREAD_REG20]; - sw r21, [\reg, THREAD_REG21]; - sw r29, [\reg, THREAD_REG29]; - sw r2, [\reg, THREAD_REG2]; - sw r0, [\reg, THREAD_REG0] -.endm - -.macro restore_context reg - lw r12, [\reg, THREAD_REG12]; - lw r13, [\reg, THREAD_REG13]; - lw r14, [\reg, THREAD_REG14]; - lw r15, [\reg, THREAD_REG15]; - lw r16, [\reg, THREAD_REG16]; - lw r17, [\reg, THREAD_REG17]; - lw r18, [\reg, THREAD_REG18]; - lw r19, [\reg, THREAD_REG19]; - lw r20, [\reg, THREAD_REG20]; - lw r21, [\reg, THREAD_REG21]; - lw r29, [\reg, THREAD_REG29]; - lw r0, [\reg, THREAD_REG0]; - lw r2, [\reg, THREAD_REG2]; - lw r3, [\reg, THREAD_REG3] -.endm - -/* - * task_struct *resume(task_struct *prev, task_struct *next, - * struct thread_info *next_ti) - */ -ENTRY(resume) - mfcr r9, cr0 - nop - nop - sw r9, [r4, THREAD_PSR] - save_context r4 - sw r3, [r4, THREAD_REG3] - - mv r28, r6 - restore_context r5 - mv r8, r6 - addi r8, KERNEL_STACK_SIZE - subi r8, 32 - la r9, kernelsp; - sw r8, [r9]; - - mfcr r9, cr0 - ldis r7, 0x00ff - nop - and r9, r9, r7 - lw r6, [r5, THREAD_PSR] - not r7, r7 - and r6, r6, r7 - or r6, r6, r9 - mtcr r6, cr0 - nop; nop; nop; nop; nop - br r3 - -ENTRY(handle_sys) - SAVE_ALL - sw r8, [r0, 16] # argument 5 from user r8 - sw r9, [r0, 20] # argument 6 from user r9 - enable_irq - - sw r4, [r0, PT_ORIG_R4] #for restart syscall - sw r7, [r0, PT_ORIG_R7] #for restart syscall - sw r27, [r0, PT_IS_SYSCALL] # it from syscall - - lw r9, [r0, PT_EPC] # skip syscall on return - addi r9, 4 - sw r9, [r0, PT_EPC] - - cmpi.c r27, __NR_syscalls # check syscall number - bcs illegal_syscall - - slli r8, r27, 2 # get syscall routine - la r11, sys_call_table - add r11, r11, r8 - lw r10, [r11] # get syscall entry - - cmpz.c r10 - beq illegal_syscall - - lw r8, [r28, TI_FLAGS] - li r9, _TIF_SYSCALL_TRACE - and.c r8, r8, r9 - bne syscall_trace_entry - - brl r10 # Do The Real system call - - cmpi.c r4, 0 - blt 1f - ldi r8, 0 - sw r8, [r0, PT_R7] - b 2f -1: - cmpi.c r4, -MAX_ERRNO - 1 - ble 2f - ldi r8, 0x1; - sw r8, [r0, PT_R7] - neg r4, r4 -2: - sw r4, [r0, PT_R4] # save result - -syscall_return: - disable_irq - lw r6, [r28, TI_FLAGS] # current->work - li r8, _TIF_WORK_MASK - and.c r8, r6, r8 - bne syscall_return_work - j restore_all - -syscall_return_work: - j syscall_exit_work - -syscall_trace_entry: - mv r16, r10 - mv r4, r0 - li r5, 0 - bl do_syscall_trace - - mv r8, r16 - lw r4, [r0, PT_R4] # Restore argument registers - lw r5, [r0, PT_R5] - lw r6, [r0, PT_R6] - lw r7, [r0, PT_R7] - brl r8 - - li r8, -MAX_ERRNO - 1 - sw r8, [r0, PT_R7] # set error flag - - neg r4, r4 # error - sw r4, [r0, PT_R0] # set flag for syscall - # restarting -1: sw r4, [r0, PT_R2] # result - j syscall_exit - -illegal_syscall: - ldi r4, -ENOSYS # error - sw r4, [r0, PT_ORIG_R4] - sw r4, [r0, PT_R4] - ldi r9, 1 # set error flag - sw r9, [r0, PT_R7] - j syscall_return - -ENTRY(sys_rt_sigreturn) - mv r4, r0 - la r8, score_rt_sigreturn - br r8 |