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/* -*- mode: asm -*-** linux/arch/m68knommu/kernel/entry.S** Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,* Kenneth Albanowski <kjahds@kjahds.com>,* The Silver Hammer Group, Ltd.** (The icky duplicate functions are my fault -- kja)** Based on:** linux/arch/m68k/kernel/entry.S** Copyright (C) 1991, 1992 Linus Torvalds** This file is subject to the terms and conditions of the GNU General Public* License. See the file README.legal in the main directory of this archive* for more details.** Linux/m68k support by Hamish Macdonald** 68060 fixes by Jesper Skov**//** entry.S contains the system-call and fault low-level handling routines.* This also contains the timer-interrupt handler, as well as all interrupts* and faults that can result in a task-switch.** NOTE: This code handles signal-recognition, which happens every time* after a timer-interrupt and after each system call.** Stack layout in 'ret_from_exception':** This allows access to the syscall arguments in registers d1-d5** 0(sp) - d1* 4(sp) - d2* 8(sp) - d3* C(sp) - d4* 10(sp) - d5* 14(sp) - a0* 18(sp) - a1* 1C(sp) - d0* 20(sp) - orig_d0* 24(sp) - stack adjustment* 28(sp) - sr* 2A(sp) - pc* 2E(sp) - format & vector*//** 12/03/96 Jes: Currently we only support m68k single-cpu systems, so* all pointers that used to be 'current' are now entry* number 0 in the 'current_set' list.*/#include <linux/sys.h>#include <linux/config.h>#include <linux/linkage.h>#include <asm/setup.h>#include <asm/segment.h>LENOSYS = 38/** these are offsets into the task-struct*/LTASK_STATE = 0LTASK_COUNTER = 4LTASK_PRIORITY = 8LTASK_SIGNAL = 12LTASK_BLOCKED = 16LTASK_FLAGS = 20/* the following macro is used when enabling interrupts */#define ALLOWINT 0xf8ff#define MAX_NOINT_IPL 0LD0 = 0x1CLORIG_D0 = 0x20LSR = 0x28LFORMATVEC = 0x2E/** This defines the normal kernel pt-regs layout.** regs are a2-a6 and d6-d7 preserved by C code* the kernel doesn't mess with usp unless it needs to*/#define SAVE_ALL \clrl %sp@-; /* stk_adj */ \movel %d0,%sp@-; /* orig d0 */ \movel %d0,%sp@-; /* d0 */ \moveml %d1-%d5/%a0-%a1,%sp@-/* moveml %sp@+,%a0-%a1/%d1-%d5; */#define RESTORE_ALL \moveml %sp@+,%d1-%d5/%a0-%a1; \movel %sp@+,%d0; \addql #4,%sp; /* orig d0 */ \addl %sp@+,%sp; /* stk adj */ \rte#define SWITCH_STACK_SIZE (7*4+4) /* includes return address */#define SAVE_SWITCH_STACK \moveml %a2-%a6/%d6-%d7,%sp@-#define RESTORE_SWITCH_STACK \moveml %sp@+,%a2-%a6/%d6-%d7.globl SYMBOL_NAME(system_call), SYMBOL_NAME(buserr), SYMBOL_NAME(trap).globl SYMBOL_NAME(resume), SYMBOL_NAME(ret_from_exception).globl SYMBOL_NAME(ret_from_signal).globl SYMBOL_NAME(trap3).globl SYMBOL_NAME(trap4).globl SYMBOL_NAME(trap5).globl SYMBOL_NAME(inthandler1).globl SYMBOL_NAME(inthandler1).globl SYMBOL_NAME(inthandler1).globl SYMBOL_NAME(inthandler2).globl SYMBOL_NAME(inthandler3).globl SYMBOL_NAME(inthandler4).globl SYMBOL_NAME(inthandler5).globl SYMBOL_NAME(inthandler6).globl SYMBOL_NAME(inthandler7).globl SYMBOL_NAME(inthandler8).globl SYMBOL_NAME(inthandler).globl SYMBOL_NAME(inthandler_wrap).globl SYMBOL_NAME(timerhandler).globl SYMBOL_NAME(serialhandler).globl SYMBOL_NAME(sys_call_table).globl SYMBOL_NAME(sys_fork), SYMBOL_NAME(sys_clone).globl SYMBOL_NAME(ret_from_interrupt), SYMBOL_NAME(bad_interrupt).textENTRY(buserr)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */jsr SYMBOL_NAME(buserr_c)addql #4,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movew %sp@(LFORMATVEC),%d0lsrl #2, %d0andl #0x3ff,%d0movel %sp,%sp@- /* stack frame pointer argument */movel %d0,%sp@-moveq #-1,%d0jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap3)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #3,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap4)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #4,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap5)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #5,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap6)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #6,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap7)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #7,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap8)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #8,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap9)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #9,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap10)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #10,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap11)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #11,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap12)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #12,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap13)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #13,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap14)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #14,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap15)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #15,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap33)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #33,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap34)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #34,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap35)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #35,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap36)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #36,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap37)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #37,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap38)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #38,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap39)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #39,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap40)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #40,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap41)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #41,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap42)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #42,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap43)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #43,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap44)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #44,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap45)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #45,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap46)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #46,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(trap47)SAVE_ALLmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */movel %sp,%sp@- /* stack frame pointer argument */movel #47,%sp@-jsr SYMBOL_NAME(trap_c)addql #8,%spjra SYMBOL_NAME(ret_from_exception)ENTRY(reschedule)/* save top of frame */pea %sp@jbsr SYMBOL_NAME(set_esp0)addql #4,%sppea SYMBOL_NAME(ret_from_exception)jmp SYMBOL_NAME(schedule)ENTRY(system_call)SAVE_ALLmovel #-LENOSYS,LD0(%sp) /* default return value in d0 *//* original D0 is in orig_d0 */movel %d0,%d2/* save top of frame */pea %sp@jbsr SYMBOL_NAME(set_esp0)addql #4,%spcmpl #NR_syscalls,%d2jcc SYMBOL_NAME(ret_from_exception)lea SYMBOL_NAME(sys_call_table),%a0lsl #2,%d2 /* movel %a0@(%d2:l:4),%d3 */movel %a0@(%d2),%d3jeq SYMBOL_NAME(ret_from_exception)lsr #2,%d2movel SYMBOL_NAME(current_set),%a0btst #5,%a0@(LTASK_FLAGS+3) /* PF_TRACESYS */bnes 1fmovel %d3,%a0jbsr %a0@movel %d0,%sp@(LD0) /* save the return value */jra SYMBOL_NAME(ret_from_exception)1:subql #4,%spSAVE_SWITCH_STACKjbsr SYMBOL_NAME(syscall_trace)RESTORE_SWITCH_STACKaddql #4,%spmovel %d3,%a0jbsr %a0@movel %d0,%sp@(LD0) /* save the return value */subql #4,%sp /* dummy return address */SAVE_SWITCH_STACKjbsr SYMBOL_NAME(syscall_trace)SYMBOL_NAME_LABEL(ret_from_signal)RESTORE_SWITCH_STACKaddql #4,%spSYMBOL_NAME_LABEL(ret_from_exception)btst #5,%sp@(LSR) /* check if returning to kernel */bnes 2f /* if so, skip resched, signals */tstl SYMBOL_NAME(need_resched)jne SYMBOL_NAME(reschedule)movel SYMBOL_NAME(current_set),%a0cmpl #SYMBOL_NAME(task),%a0 /* task[0] cannot have signals */jeq 2fbclr #5,%a0@(LTASK_FLAGS+1) /* check for delayed trace */jeq 1fbclr #7,%sp@(LSR) /* clear trace bit in SR */pea 1 /* send SIGTRAP */movel %a0,%sp@-pea 5jbsr SYMBOL_NAME(send_sig)addql #8,%spaddql #4,%spmovel SYMBOL_NAME(current_set),%a01:tstl %a0@(LTASK_STATE) /* state */jne SYMBOL_NAME(reschedule)tstl %a0@(LTASK_COUNTER) /* counter */jeq SYMBOL_NAME(reschedule)movel %a0@(LTASK_BLOCKED),%d0movel %d0,%d1 /* save blocked in d1 for sig handling */notl %d0btst #4,%a0@(LTASK_FLAGS+3) /* PF_PTRACED */jeq 1fmoveq #-1,%d0 /* let the debugger see all signals */1: andl %a0@(LTASK_SIGNAL),%d0jne Lsignal_return2: RESTORE_ALL /* Does RTE */Lsignal_return:subql #4,%sp /* dummy return address */SAVE_SWITCH_STACKpea %sp@(SWITCH_STACK_SIZE)movel %d1,%sp@-jsr SYMBOL_NAME(do_signal)addql #8,%spRESTORE_SWITCH_STACKaddql #4,%spRESTORE_ALL/*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(timerhandler)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #0x40,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(serialhandler)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #0x42,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler1)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #65,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler2)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #66,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler3)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #67,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler4)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #68,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler5)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #69,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler6)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #70,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler7)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #71,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler8)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0and #0x3ff,%d0/* bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel #72,%sp@- /* put vector # on stack (was %d0) */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler_wrap)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0lsrl #2, %d0andl #0x3ff,%d0/*| bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel %d0 /*#31*/ ,%sp@- /* put vector # on stack */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */bra ret_from_interrupt /* this was fallthrough *//*** This is the main interrupt handler, responsible for calling process_int()*/SYMBOL_NAME_LABEL(inthandler)SAVE_ALLoriw #0x700,%srmoveq #-1,%d0movel %d0,%sp@(LORIG_D0) /* a -1 in the ORIG_D0 field *//* signifies that the stack frame *//* is NOT for syscall */addql #1,SYMBOL_NAME(intr_count)/* put exception # in d0 *//*movel %sp@(LFORMATVEC),%d0 *//*lsr #4,%d0 */movew %sp@(LFORMATVEC),%d0lsrl #2, %d0andl #0x3ff,%d0/*| bfextu %sp@(LFORMATVEC){#4,#10},%d0 */movel %sp,%sp@-movel %d0,%sp@- /* put vector # on stack */jbsr SYMBOL_NAME(process_int)/* process the IRQ */addql #8,%sp /* pop parameters off stack */SYMBOL_NAME_LABEL(ret_from_interrupt)/* check if we need to do software interrupts */1:movel SYMBOL_NAME(intr_count),%d1subql #1,%d1jne 4f/*movel %sp@(LSR),%d0 *//*lsr #5,%d0 */moveb %sp@(LSR),%d0and #0x7,%d0/*bfextu %sp@(LSR){#5,#3},%d0 | Check for nested interrupt. */#if MAX_NOINT_IPL > 0cmpiw #MAX_NOINT_IPL,%d0#endifjhi 4f2:movel SYMBOL_NAME(bh_active),%d0andl SYMBOL_NAME(bh_mask),%d0jne 3fclrl SYMBOL_NAME(intr_count) /* deliver signals, reschedule etc.. */jra SYMBOL_NAME(ret_from_exception)3:jbsr SYMBOL_NAME(do_bottom_half)jbra 2b4:movel %d1,SYMBOL_NAME(intr_count)RESTORE_ALL/* Handler for uninitialized and spurious interrupts */SYMBOL_NAME_LABEL(bad_interrupt)addql #1,SYMBOL_NAME(num_spurious)rteENTRY(sys_fork)SAVE_SWITCH_STACKpea %sp@(SWITCH_STACK_SIZE)jbsr SYMBOL_NAME(m68k_fork)addql #4,%spRESTORE_SWITCH_STACKrtsENTRY(sys_clone)SAVE_SWITCH_STACKpea %sp@(SWITCH_STACK_SIZE)jbsr SYMBOL_NAME(m68k_clone)addql #4,%spRESTORE_SWITCH_STACKrtsENTRY(sys_sigsuspend)SAVE_SWITCH_STACKpea %sp@(SWITCH_STACK_SIZE)jbsr SYMBOL_NAME(do_sigsuspend)addql #4,%spRESTORE_SWITCH_STACKrtsENTRY(sys_sigreturn)SAVE_SWITCH_STACKjbsr SYMBOL_NAME(do_sigreturn)RESTORE_SWITCH_STACKrtsLFLUSH_I_AND_D = 0x00000808LTSS_KSP = 0LTSS_USP = 4LTSS_SR = 8LTSS_FS = 10LTSS_CRP = 12LTSS_FPCTXT = 24SYMBOL_NAME_LABEL(resume)/** Beware - when entering resume, offset of tss is in d1,* prev (the current task) is in a0, next (the new task)* is in a1 and d2.b is non-zero if the mm structure is* shared between the tasks, so don't change these* registers until their contents are no longer needed.*//* offset of tss struct (processor state) from beginningof task struct */addl %d1,%a0/* save sr */movew %sr,%a0@(LTSS_SR)/* disable interrupts */oriw #0x0700,%sr#ifndef NO_MM/* save fs (sfc,%dfc) (may be pointing to kernel memory) */movec %sfc,%d0movew %d0,%a0@(LTSS_FS)#endif/* save usp *//* it is better to use a movel here instead of a movew 8*) *//* save non-scratch registers on stack */SAVE_SWITCH_STACKmovel %usp,%a2 /* usp */movel %a2,%a0@(LTSS_USP)#if 0/* busted */movel %usp,%d0 /* usp */movel %d0,%a0@(LTSS_USP)#endif/* save current kernel stack pointer */movel %sp,%a0@(LTSS_KSP)/* get pointer to tss struct (a1 contains new task) */movel %a1,SYMBOL_NAME(current_set)addl %d1,%a1/* Skip address space switching if they are the same. *//* FIXME: what did we hack out of here, this does nothing! */#if 0tstb %d2jne 4f#endif2:4:/* restore floating point context *//* restore the kernel stack pointer */movel %a1@(LTSS_KSP),%sp/* restore non-scratch registers */RESTORE_SWITCH_STACK/* restore user stack pointer */movel %a1@(LTSS_USP),%a0movel %a0,%usp#ifndef NO_MM/* restore fs (sfc,%dfc) */movew %a1@(LTSS_FS),%a0movec %a0,%sfcmovec %a0,%dfc#endif/* restore status register */movew %a1@(LTSS_SR),%srrts.textALIGNSYMBOL_NAME_LABEL(sys_call_table).long SYMBOL_NAME(sys_setup) /* 0 */.long SYMBOL_NAME(sys_exit).long SYMBOL_NAME(sys_fork).long SYMBOL_NAME(sys_read).long SYMBOL_NAME(sys_write).long SYMBOL_NAME(sys_open) /* 5 */.long SYMBOL_NAME(sys_close).long SYMBOL_NAME(sys_waitpid).long SYMBOL_NAME(sys_creat).long SYMBOL_NAME(sys_link).long SYMBOL_NAME(sys_unlink) /* 10 */.long SYMBOL_NAME(sys_execve).long SYMBOL_NAME(sys_chdir).long SYMBOL_NAME(sys_time).long SYMBOL_NAME(sys_mknod).long SYMBOL_NAME(sys_chmod) /* 15 */.long SYMBOL_NAME(sys_chown).long SYMBOL_NAME(sys_break).long SYMBOL_NAME(sys_stat).long SYMBOL_NAME(sys_lseek).long SYMBOL_NAME(sys_getpid) /* 20 */.long SYMBOL_NAME(sys_mount).long SYMBOL_NAME(sys_umount).long SYMBOL_NAME(sys_setuid).long SYMBOL_NAME(sys_getuid).long SYMBOL_NAME(sys_stime) /* 25 */.long SYMBOL_NAME(sys_ptrace).long SYMBOL_NAME(sys_alarm).long SYMBOL_NAME(sys_fstat).long SYMBOL_NAME(sys_pause).long SYMBOL_NAME(sys_utime) /* 30 */.long SYMBOL_NAME(sys_stty).long SYMBOL_NAME(sys_gtty).long SYMBOL_NAME(sys_access).long SYMBOL_NAME(sys_nice).long SYMBOL_NAME(sys_ftime) /* 35 */.long SYMBOL_NAME(sys_sync).long SYMBOL_NAME(sys_kill).long SYMBOL_NAME(sys_rename).long SYMBOL_NAME(sys_mkdir).long SYMBOL_NAME(sys_rmdir) /* 40 */.long SYMBOL_NAME(sys_dup).long SYMBOL_NAME(sys_pipe).long SYMBOL_NAME(sys_times).long SYMBOL_NAME(sys_prof).long SYMBOL_NAME(sys_brk) /* 45 */.long SYMBOL_NAME(sys_setgid).long SYMBOL_NAME(sys_getgid).long SYMBOL_NAME(sys_signal).long SYMBOL_NAME(sys_geteuid).long SYMBOL_NAME(sys_getegid) /* 50 */.long SYMBOL_NAME(sys_acct).long SYMBOL_NAME(sys_phys).long SYMBOL_NAME(sys_lock).long SYMBOL_NAME(sys_ioctl).long SYMBOL_NAME(sys_fcntl) /* 55 */.long SYMBOL_NAME(sys_mpx).long SYMBOL_NAME(sys_setpgid).long SYMBOL_NAME(sys_ulimit).long SYMBOL_NAME(sys_olduname).long SYMBOL_NAME(sys_umask) /* 60 */.long SYMBOL_NAME(sys_chroot).long SYMBOL_NAME(sys_ustat).long SYMBOL_NAME(sys_dup2).long SYMBOL_NAME(sys_getppid).long SYMBOL_NAME(sys_getpgrp) /* 65 */.long SYMBOL_NAME(sys_setsid).long SYMBOL_NAME(sys_sigaction).long SYMBOL_NAME(sys_sgetmask).long SYMBOL_NAME(sys_ssetmask).long SYMBOL_NAME(sys_setreuid) /* 70 */.long SYMBOL_NAME(sys_setregid).long SYMBOL_NAME(sys_sigsuspend).long SYMBOL_NAME(sys_sigpending).long SYMBOL_NAME(sys_sethostname).long SYMBOL_NAME(sys_setrlimit) /* 75 */.long SYMBOL_NAME(sys_getrlimit).long SYMBOL_NAME(sys_getrusage).long SYMBOL_NAME(sys_gettimeofday).long SYMBOL_NAME(sys_settimeofday).long SYMBOL_NAME(sys_getgroups) /* 80 */.long SYMBOL_NAME(sys_setgroups).long SYMBOL_NAME(old_select).long SYMBOL_NAME(sys_symlink).long SYMBOL_NAME(sys_lstat).long SYMBOL_NAME(sys_readlink) /* 85 */.long SYMBOL_NAME(sys_uselib).long SYMBOL_NAME(sys_swapon).long SYMBOL_NAME(sys_reboot).long SYMBOL_NAME(old_readdir).long SYMBOL_NAME(old_mmap) /* 90 */.long SYMBOL_NAME(sys_munmap).long SYMBOL_NAME(sys_truncate).long SYMBOL_NAME(sys_ftruncate).long SYMBOL_NAME(sys_fchmod).long SYMBOL_NAME(sys_fchown) /* 95 */.long SYMBOL_NAME(sys_getpriority).long SYMBOL_NAME(sys_setpriority).long SYMBOL_NAME(sys_profil).long SYMBOL_NAME(sys_statfs).long SYMBOL_NAME(sys_fstatfs) /* 100 */.long SYMBOL_NAME(sys_ioperm).long SYMBOL_NAME(sys_socketcall).long SYMBOL_NAME(sys_syslog).long SYMBOL_NAME(sys_setitimer).long SYMBOL_NAME(sys_getitimer) /* 105 */.long SYMBOL_NAME(sys_newstat).long SYMBOL_NAME(sys_newlstat).long SYMBOL_NAME(sys_newfstat).long SYMBOL_NAME(sys_uname).long SYMBOL_NAME(sys_ni_syscall) /* iopl for i386 */ /* 110 */.long SYMBOL_NAME(sys_vhangup).long SYMBOL_NAME(sys_idle).long SYMBOL_NAME(sys_ni_syscall) /* vm86 for i386 */.long SYMBOL_NAME(sys_wait4).long SYMBOL_NAME(sys_swapoff) /* 115 */.long SYMBOL_NAME(sys_sysinfo).long SYMBOL_NAME(sys_ipc).long SYMBOL_NAME(sys_fsync).long SYMBOL_NAME(sys_sigreturn).long SYMBOL_NAME(sys_clone) /* 120 */.long SYMBOL_NAME(sys_setdomainname).long SYMBOL_NAME(sys_newuname).long SYMBOL_NAME(sys_cacheflush) /* modify_ldt for i386 */.long SYMBOL_NAME(sys_adjtimex).long SYMBOL_NAME(sys_mprotect) /* 125 */.long SYMBOL_NAME(sys_sigprocmask).long SYMBOL_NAME(sys_create_module).long SYMBOL_NAME(sys_init_module).long SYMBOL_NAME(sys_delete_module).long SYMBOL_NAME(sys_get_kernel_syms) /* 130 */.long SYMBOL_NAME(sys_quotactl).long SYMBOL_NAME(sys_getpgid).long SYMBOL_NAME(sys_fchdir).long SYMBOL_NAME(sys_bdflush).long SYMBOL_NAME(sys_sysfs) /* 135 */.long SYMBOL_NAME(sys_personality).long SYMBOL_NAME(sys_ni_syscall) /* for afs_syscall */.long SYMBOL_NAME(sys_setfsuid).long SYMBOL_NAME(sys_setfsgid).long SYMBOL_NAME(sys_llseek) /* 140 */.long SYMBOL_NAME(sys_getdents).long SYMBOL_NAME(sys_select).long SYMBOL_NAME(sys_flock).long SYMBOL_NAME(sys_msync).long SYMBOL_NAME(sys_readv) /* 145 */.long SYMBOL_NAME(sys_writev).long SYMBOL_NAME(sys_getsid).long SYMBOL_NAME(sys_fdatasync).long SYMBOL_NAME(sys_sysctl).long SYMBOL_NAME(sys_mlock) /* 150 */.long SYMBOL_NAME(sys_munlock).long SYMBOL_NAME(sys_mlockall).long SYMBOL_NAME(sys_munlockall).long SYMBOL_NAME(sys_sched_setparam).long SYMBOL_NAME(sys_sched_getparam) /* 155 */.long SYMBOL_NAME(sys_sched_setscheduler).long SYMBOL_NAME(sys_sched_getscheduler).long SYMBOL_NAME(sys_sched_yield).long SYMBOL_NAME(sys_sched_get_priority_max).long SYMBOL_NAME(sys_sched_get_priority_min) /* 160 */.long SYMBOL_NAME(sys_sched_rr_get_interval).long SYMBOL_NAME(sys_nanosleep).long SYMBOL_NAME(sys_mremap).space (NR_syscalls-163)*4