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199 |
simons |
/*
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*
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* linux/arch/m68knommu/kernel/entry.S
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*
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* Copyright (C) 1999 Keith Adams ,
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* Oregon Graduate Institute
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*
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*/
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/*
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* syscall, interrupt, and fault entry points
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*/
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#include
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#include
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#define ALL_ONES 0xffffffff
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#include
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#include
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#include
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#include
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#include
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#ifdef CONFIG_I960VH
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#include
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#endif
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.globl SYMBOL_NAME(atmod)
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SYMBOL_NAME_LABEL(atmod)
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atmod g0, g1, g2
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mov g2, g0
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ret
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/*
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* The birthplace of kernel threads. Once here, we find the function to call
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* in register r3, and its argument in r4. See kernel_thread in asm/unistd.h
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* for why this exists.
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*/
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.globl SYMBOL_NAME(kthread_trampoline)
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SYMBOL_NAME_LABEL(kthread_trampoline)
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mov r3, g0
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mov r4, g1
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call SYMBOL_NAME(kthread_start)
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ldconst 0, g0
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b SYMBOL_NAME(do_exit)
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/* no ret */
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/*
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* signal handlers start here in signal_head.
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*/
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.globl SYMBOL_NAME(signal_head)
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SYMBOL_NAME_LABEL(signal_head)
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mov g0, r5
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mov r4, g0
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callx (r3)
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mov r5, g0
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ret
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#define USER_AC 0x3b001000
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#define USER_PC 0x00002000 /* bit 13 set: interrupted mode */
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#define KSP_OFFSET 0x58
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#if 0
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#define CKPT(x,y) \
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ldconst x, g0; \
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mov y, g1; \
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call SYMBOL_NAME(ckpt);
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#endif
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/* XXX: todo: emulate an interrupt: put PC and AC on stack */
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/*
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* This is branched to by intr and syscall; it switches to the kernel stack,
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* and returns to the ip in r6. The choice of registers lets us economize
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* on store operations.
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*
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* Be sure to branch here, rather than call; we can't use a single frame of
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* the shared intr/syscall stacks.
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*
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* Observe weird register conventions (because we can't alter g* regs):
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* ip after switch: r6
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* r3 in new stack: r7 (for intr/fault)
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* PC to be seen in new stack: r8
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*/
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.align 4
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switch_to_kstack:
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ld SYMBOL_NAME(current_set), r3
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ld KSP_OFFSET(r3), r3
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ldconst 64, r5
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addo r3, r5, r3 # get some space on stack (for PC/AC)
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/*
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* r3 now points to the address of the new stack frame. We build an image of
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* the new stack frame in regs r4-r7. The intr needs to
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* remember its intr vector, so we also put r7 on the stack, in the r3
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* position.
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*/
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mov pfp, r4 # newframe->pfp = current pfp
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addo r5, r3, r5 # newframe->sp = newframe + 64
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# newframe->rip = rip (passed in r6)
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# newframe->r3 = r7
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stq r4, (r3)
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/* Store AC, PC as if in interrupt context */
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modac 0, 0, r9
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stl r8, -16(r3) # current ac, pc passed in r8
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flushreg
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mov r3, pfp
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flushreg
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ret # returns to ip from r6
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/*
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* System calls all end up here.
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*/
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.globl SYMBOL_NAME(syscall)
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.align 4
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SYMBOL_NAME_LABEL(syscall)
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/*
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* first, examine pfp; if its 1st and 2nd bits are 1 and 0 respectively,
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* we're coming from user mode, so we need to switch stacks.
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*/
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bbs 2, pfp, 1f # if bit 2 is set, we're cool
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bbc 1, pfp, 1f # same if bit 1 is clear
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/* uh-oh, we're coming from user mode: switch stacks */
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lda 1f, r6
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ldconst USER_PC, r8
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b switch_to_kstack
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1:
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SAVE_ALL(r3)
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subo 16, fp, g0
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call SYMBOL_NAME(csyscall)
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RESTORE_ALL(r3)
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ret
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/*
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* This is the main interrupt handler; it is also the entry point for
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* system calls.
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*/
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.globl SYMBOL_NAME(intr)
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.align 4
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SYMBOL_NAME_LABEL(intr)
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ld -16(fp), r3
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ldob -8(fp), r7
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bbs 1, r3, 1f # if we're supervisor, forget it
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/* uh-oh, switch stacks */
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lda 2f, r6
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mov r3, r8
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b switch_to_kstack
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1:
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mov r7, r3
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2:
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/*
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* by now we're on a valid stack, and the interrupt vector number is in
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* r3.
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*/
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SAVE_ALL(r4)
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mov r3, g0 # 1st arg is intr vector
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flushreg # get regs on stack
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subo 16, fp, g1 # 2nd arg is pointer to pt_regs
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call SYMBOL_NAME(cintr)
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RESTORE_ALL(r3)
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ret # back to user-level
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/*
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* Again, if we're coming from user mode, switch to kstack. We get this info
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* from the fault record, 16 bytes below the current fp. We play games similar
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* to intr to hold onto the fault record...
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*/
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.globl SYMBOL_NAME(fault)
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SYMBOL_NAME_LABEL(fault)
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subo 16, fp, r7
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ld (r7), r3 # r3 gets pc of faulting instr
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bbs 1, r3, 1f # if it was a supervisor fault, don't switch
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lda 2f, r6
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ldconst USER_PC, r8
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b switch_to_kstack
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1:
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mov r7, r3
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2:
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SAVE_ALL(r4)
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mov r3, g0
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subo 16, fp, g1
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call SYMBOL_NAME(cfault)
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RESTORE_ALL(r4)
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ret
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/*
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* The table of system calls.
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*/
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.globl SYMBOL_NAME(syscall_tab)
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SYMBOL_NAME_LABEL(syscall_tab)
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.long SYMBOL_NAME(sys_setup) /* 0 */
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.long SYMBOL_NAME(sys_exit)
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.long SYMBOL_NAME(sys_fork)
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.long SYMBOL_NAME(sys_read)
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.long SYMBOL_NAME(sys_write)
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.long SYMBOL_NAME(sys_open) /* 5 */
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.long SYMBOL_NAME(sys_close)
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.long SYMBOL_NAME(sys_waitpid)
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.long SYMBOL_NAME(sys_creat)
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.long SYMBOL_NAME(sys_link)
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.long SYMBOL_NAME(sys_unlink) /* 10 */
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.long SYMBOL_NAME(sys_execve)
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.long SYMBOL_NAME(sys_chdir)
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.long SYMBOL_NAME(sys_time)
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.long SYMBOL_NAME(sys_mknod)
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.long SYMBOL_NAME(sys_chmod) /* 15 */
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.long SYMBOL_NAME(sys_chown)
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.long SYMBOL_NAME(sys_break)
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.long SYMBOL_NAME(sys_stat)
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.long SYMBOL_NAME(sys_lseek)
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.long SYMBOL_NAME(sys_getpid) /* 20 */
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.long SYMBOL_NAME(sys_mount)
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.long SYMBOL_NAME(sys_umount)
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.long SYMBOL_NAME(sys_setuid)
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.long SYMBOL_NAME(sys_getuid)
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.long SYMBOL_NAME(sys_stime) /* 25 */
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.long SYMBOL_NAME(sys_ptrace)
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.long SYMBOL_NAME(sys_alarm)
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.long SYMBOL_NAME(sys_fstat)
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.long SYMBOL_NAME(sys_pause)
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.long SYMBOL_NAME(sys_utime) /* 30 */
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.long SYMBOL_NAME(sys_stty)
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.long SYMBOL_NAME(sys_gtty)
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.long SYMBOL_NAME(sys_access)
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.long SYMBOL_NAME(sys_nice)
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.long SYMBOL_NAME(sys_ftime) /* 35 */
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.long SYMBOL_NAME(sys_sync)
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.long SYMBOL_NAME(sys_kill)
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.long SYMBOL_NAME(sys_rename)
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.long SYMBOL_NAME(sys_mkdir)
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.long SYMBOL_NAME(sys_rmdir) /* 40 */
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.long SYMBOL_NAME(sys_dup)
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.long SYMBOL_NAME(do_pipe)
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.long SYMBOL_NAME(sys_times)
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.long SYMBOL_NAME(sys_prof)
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.long SYMBOL_NAME(sys_brk) /* 45 */
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| 241 |
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.long SYMBOL_NAME(sys_setgid)
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| 242 |
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.long SYMBOL_NAME(sys_getgid)
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| 243 |
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.long SYMBOL_NAME(sys_signal)
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| 244 |
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.long SYMBOL_NAME(sys_geteuid)
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| 245 |
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.long SYMBOL_NAME(sys_getegid) /* 50 */
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| 246 |
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.long SYMBOL_NAME(sys_acct)
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| 247 |
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.long SYMBOL_NAME(sys_phys)
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| 248 |
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.long SYMBOL_NAME(sys_lock)
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| 249 |
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.long SYMBOL_NAME(sys_ioctl)
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| 250 |
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.long SYMBOL_NAME(sys_fcntl) /* 55 */
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| 251 |
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.long SYMBOL_NAME(sys_mpx)
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| 252 |
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.long SYMBOL_NAME(sys_setpgid)
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| 253 |
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.long SYMBOL_NAME(sys_ulimit)
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| 254 |
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.long SYMBOL_NAME(sys_olduname)
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.long SYMBOL_NAME(sys_umask) /* 60 */
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| 256 |
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.long SYMBOL_NAME(sys_chroot)
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| 257 |
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.long SYMBOL_NAME(sys_ustat)
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| 258 |
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.long SYMBOL_NAME(sys_dup2)
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| 259 |
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.long SYMBOL_NAME(sys_getppid)
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| 260 |
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.long SYMBOL_NAME(sys_getpgrp) /* 65 */
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| 261 |
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.long SYMBOL_NAME(sys_setsid)
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| 262 |
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.long SYMBOL_NAME(sys_sigaction)
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| 263 |
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.long SYMBOL_NAME(sys_sgetmask)
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| 264 |
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.long SYMBOL_NAME(sys_ssetmask)
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| 265 |
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.long SYMBOL_NAME(sys_setreuid) /* 70 */
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| 266 |
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.long SYMBOL_NAME(sys_setregid)
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| 267 |
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.long SYMBOL_NAME(do_sigsuspend)
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| 268 |
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.long SYMBOL_NAME(sys_sigpending)
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| 269 |
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.long SYMBOL_NAME(sys_sethostname)
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| 270 |
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.long SYMBOL_NAME(sys_setrlimit) /* 75 */
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| 271 |
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.long SYMBOL_NAME(sys_getrlimit)
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| 272 |
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.long SYMBOL_NAME(sys_getrusage)
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| 273 |
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.long SYMBOL_NAME(sys_gettimeofday)
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| 274 |
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.long SYMBOL_NAME(sys_settimeofday)
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| 275 |
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.long SYMBOL_NAME(sys_getgroups) /* 80 */
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| 276 |
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.long SYMBOL_NAME(sys_setgroups)
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| 277 |
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.long SYMBOL_NAME(sys_select)
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| 278 |
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.long SYMBOL_NAME(sys_symlink)
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| 279 |
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.long SYMBOL_NAME(sys_lstat)
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| 280 |
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.long SYMBOL_NAME(sys_readlink) /* 85 */
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| 281 |
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.long SYMBOL_NAME(sys_uselib)
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| 282 |
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.long SYMBOL_NAME(sys_swapon)
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| 283 |
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.long SYMBOL_NAME(sys_reboot)
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| 284 |
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.long SYMBOL_NAME(sys_ni_syscall)
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| 285 |
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.long SYMBOL_NAME(sys_ni_syscall) /* 90 */
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| 286 |
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.long SYMBOL_NAME(sys_munmap)
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| 287 |
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.long SYMBOL_NAME(sys_truncate)
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| 288 |
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.long SYMBOL_NAME(sys_ftruncate)
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| 289 |
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.long SYMBOL_NAME(sys_fchmod)
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| 290 |
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.long SYMBOL_NAME(sys_fchown) /* 95 */
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| 291 |
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.long SYMBOL_NAME(sys_getpriority)
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| 292 |
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.long SYMBOL_NAME(sys_setpriority)
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| 293 |
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.long SYMBOL_NAME(sys_profil)
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| 294 |
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.long SYMBOL_NAME(sys_statfs)
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| 295 |
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.long SYMBOL_NAME(sys_fstatfs) /* 100 */
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| 296 |
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.long SYMBOL_NAME(sys_ioperm)
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| 297 |
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.long SYMBOL_NAME(sys_socketcall)
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| 298 |
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.long SYMBOL_NAME(sys_syslog)
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| 299 |
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.long SYMBOL_NAME(sys_setitimer)
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| 300 |
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.long SYMBOL_NAME(sys_getitimer) /* 105 */
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| 301 |
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.long SYMBOL_NAME(sys_newstat)
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| 302 |
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.long SYMBOL_NAME(sys_newlstat)
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| 303 |
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.long SYMBOL_NAME(sys_newfstat)
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| 304 |
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.long SYMBOL_NAME(sys_uname)
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| 305 |
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.long SYMBOL_NAME(sys_ni_syscall) /* iopl for i386 */ /* 110 */
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| 306 |
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.long SYMBOL_NAME(sys_vhangup)
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| 307 |
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.long SYMBOL_NAME(sys_idle)
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| 308 |
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.long SYMBOL_NAME(sys_ni_syscall) /* vm86 for i386 */
|
| 309 |
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.long SYMBOL_NAME(sys_wait4)
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| 310 |
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.long SYMBOL_NAME(sys_swapoff) /* 115 */
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| 311 |
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.long SYMBOL_NAME(sys_sysinfo)
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| 312 |
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.long SYMBOL_NAME(sys_ipc)
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| 313 |
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.long SYMBOL_NAME(sys_fsync)
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| 314 |
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.long SYMBOL_NAME(do_sigreturn)
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| 315 |
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.long SYMBOL_NAME(sys_clone) /* 120 */
|
| 316 |
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.long SYMBOL_NAME(sys_setdomainname)
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| 317 |
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.long SYMBOL_NAME(sys_newuname)
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| 318 |
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.long SYMBOL_NAME(sys_cacheflush) /* modify_ldt for i386 */
|
| 319 |
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.long SYMBOL_NAME(sys_adjtimex)
|
| 320 |
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.long SYMBOL_NAME(sys_mprotect) /* 125 */
|
| 321 |
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.long SYMBOL_NAME(sys_sigprocmask)
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| 322 |
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.long SYMBOL_NAME(sys_create_module)
|
| 323 |
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.long SYMBOL_NAME(sys_init_module)
|
| 324 |
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|
.long SYMBOL_NAME(sys_delete_module)
|
| 325 |
|
|
.long SYMBOL_NAME(sys_get_kernel_syms) /* 130 */
|
| 326 |
|
|
.long SYMBOL_NAME(sys_quotactl)
|
| 327 |
|
|
.long SYMBOL_NAME(sys_getpgid)
|
| 328 |
|
|
.long SYMBOL_NAME(sys_fchdir)
|
| 329 |
|
|
.long SYMBOL_NAME(sys_bdflush)
|
| 330 |
|
|
.long SYMBOL_NAME(sys_sysfs) /* 135 */
|
| 331 |
|
|
.long SYMBOL_NAME(sys_personality)
|
| 332 |
|
|
.long SYMBOL_NAME(sys_ni_syscall) /* for afs_syscall */
|
| 333 |
|
|
.long SYMBOL_NAME(sys_setfsuid)
|
| 334 |
|
|
.long SYMBOL_NAME(sys_setfsgid)
|
| 335 |
|
|
.long SYMBOL_NAME(sys_llseek) /* 140 */
|
| 336 |
|
|
.long SYMBOL_NAME(sys_getdents)
|
| 337 |
|
|
.long SYMBOL_NAME(sys_select)
|
| 338 |
|
|
.long SYMBOL_NAME(sys_flock)
|
| 339 |
|
|
.long SYMBOL_NAME(sys_msync)
|
| 340 |
|
|
.long SYMBOL_NAME(sys_readv) /* 145 */
|
| 341 |
|
|
.long SYMBOL_NAME(sys_writev)
|
| 342 |
|
|
.long SYMBOL_NAME(sys_getsid)
|
| 343 |
|
|
.long SYMBOL_NAME(sys_fdatasync)
|
| 344 |
|
|
.long SYMBOL_NAME(sys_sysctl)
|
| 345 |
|
|
.long SYMBOL_NAME(sys_mlock) /* 150 */
|
| 346 |
|
|
.long SYMBOL_NAME(sys_munlock)
|
| 347 |
|
|
.long SYMBOL_NAME(sys_mlockall)
|
| 348 |
|
|
.long SYMBOL_NAME(sys_munlockall)
|
| 349 |
|
|
.long SYMBOL_NAME(sys_sched_setparam)
|
| 350 |
|
|
.long SYMBOL_NAME(sys_sched_getparam) /* 155 */
|
| 351 |
|
|
.long SYMBOL_NAME(sys_sched_setscheduler)
|
| 352 |
|
|
.long SYMBOL_NAME(sys_sched_getscheduler)
|
| 353 |
|
|
.long SYMBOL_NAME(sys_sched_yield)
|
| 354 |
|
|
.long SYMBOL_NAME(sys_sched_get_priority_max)
|
| 355 |
|
|
.long SYMBOL_NAME(sys_sched_get_priority_min) /* 160 */
|
| 356 |
|
|
.long SYMBOL_NAME(sys_sched_rr_get_interval)
|
| 357 |
|
|
.long SYMBOL_NAME(sys_nanosleep)
|
| 358 |
|
|
.long SYMBOL_NAME(sys_mremap)
|
