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324 lines
6.6 KiB
324 lines
6.6 KiB
/* |
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* fp_emu.S |
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* |
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* Copyright Roman Zippel, 1997. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, and the entire permission notice in its entirety, |
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* including the disclaimer of warranties. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote |
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* products derived from this software without specific prior |
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* written permission. |
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* |
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* ALTERNATIVELY, this product may be distributed under the terms of |
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* the GNU General Public License, in which case the provisions of the GPL are |
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* required INSTEAD OF the above restrictions. (This clause is |
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* necessary due to a potential bad interaction between the GPL and |
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* the restrictions contained in a BSD-style copyright.) |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <linux/linkage.h> |
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#include <asm/entry.h> |
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#include "fp_emu.h" |
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.globl fpu_emu |
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.globl fp_debugprint |
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.globl fp_err_ua1,fp_err_ua2 |
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.text |
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fpu_emu: |
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SAVE_ALL_INT |
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GET_CURRENT(%d0) |
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#if defined(CPU_M68020_OR_M68030) && defined(CPU_M68040_OR_M68060) |
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tst.l m68k_is040or060 |
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jeq 1f |
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#endif |
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#if defined(CPU_M68040_OR_M68060) |
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move.l (FPS_PC2,%sp),(FPS_PC,%sp) |
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#endif |
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1: |
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| emulate the instruction |
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jsr fp_scan |
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#if defined(CONFIG_M68060) |
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#if !defined(CPU_M68060_ONLY) |
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btst #3,m68k_cputype+3 |
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jeq 1f |
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#endif |
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btst #7,(FPS_SR,%sp) |
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jne fp_sendtrace060 |
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#endif |
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1: |
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| emulation successful? |
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tst.l %d0 |
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jeq ret_from_exception |
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| send some signal to program here |
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jra ret_from_exception |
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| we jump here after an access error while trying to access |
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| user space, we correct stackpointer and send a SIGSEGV to |
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| the user process |
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fp_err_ua2: |
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addq.l #4,%sp |
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fp_err_ua1: |
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addq.l #4,%sp |
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move.l %a0,-(%sp) |
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pea LSEGV_MAPERR |
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pea LSIGSEGV |
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jsr fpemu_signal |
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add.w #12,%sp |
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jra ret_from_exception |
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#if defined(CONFIG_M68060) |
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| send a trace signal if we are debugged |
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| it does not really belong here, but... |
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fp_sendtrace060: |
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move.l (FPS_PC,%sp),-(%sp) |
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pea LTRAP_TRACE |
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pea LSIGTRAP |
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jsr fpemu_signal |
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add.w #12,%sp |
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jra ret_from_exception |
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#endif |
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.globl fp_get_data_reg, fp_put_data_reg |
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.globl fp_get_addr_reg, fp_put_addr_reg |
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| Entry points to get/put a register. Some of them can be get/put |
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| directly, others are on the stack, as we read/write the stack |
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| directly here, these function may only be called from within |
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| instruction decoding, otherwise the stack pointer is incorrect |
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| and the stack gets corrupted. |
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fp_get_data_reg: |
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jmp ([0f:w,%pc,%d0.w*4]) |
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.align 4 |
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0: |
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.long fp_get_d0, fp_get_d1 |
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.long fp_get_d2, fp_get_d3 |
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.long fp_get_d4, fp_get_d5 |
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.long fp_get_d6, fp_get_d7 |
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fp_get_d0: |
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move.l (PT_OFF_D0+8,%sp),%d0 |
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printf PREGISTER,"{d0->%08x}",1,%d0 |
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rts |
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fp_get_d1: |
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move.l (PT_OFF_D1+8,%sp),%d0 |
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printf PREGISTER,"{d1->%08x}",1,%d0 |
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rts |
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fp_get_d2: |
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move.l (PT_OFF_D2+8,%sp),%d0 |
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printf PREGISTER,"{d2->%08x}",1,%d0 |
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rts |
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fp_get_d3: |
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move.l %d3,%d0 |
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printf PREGISTER,"{d3->%08x}",1,%d0 |
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rts |
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fp_get_d4: |
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move.l %d4,%d0 |
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printf PREGISTER,"{d4->%08x}",1,%d0 |
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rts |
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fp_get_d5: |
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move.l %d5,%d0 |
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printf PREGISTER,"{d5->%08x}",1,%d0 |
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rts |
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fp_get_d6: |
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move.l %d6,%d0 |
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printf PREGISTER,"{d6->%08x}",1,%d0 |
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rts |
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fp_get_d7: |
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move.l %d7,%d0 |
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printf PREGISTER,"{d7->%08x}",1,%d0 |
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rts |
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fp_put_data_reg: |
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jmp ([0f:w,%pc,%d1.w*4]) |
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.align 4 |
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0: |
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.long fp_put_d0, fp_put_d1 |
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.long fp_put_d2, fp_put_d3 |
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.long fp_put_d4, fp_put_d5 |
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.long fp_put_d6, fp_put_d7 |
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fp_put_d0: |
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printf PREGISTER,"{d0<-%08x}",1,%d0 |
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move.l %d0,(PT_OFF_D0+8,%sp) |
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rts |
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fp_put_d1: |
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printf PREGISTER,"{d1<-%08x}",1,%d0 |
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move.l %d0,(PT_OFF_D1+8,%sp) |
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rts |
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fp_put_d2: |
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printf PREGISTER,"{d2<-%08x}",1,%d0 |
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move.l %d0,(PT_OFF_D2+8,%sp) |
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rts |
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fp_put_d3: |
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printf PREGISTER,"{d3<-%08x}",1,%d0 |
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| move.l %d0,%d3 |
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move.l %d0,(PT_OFF_D3+8,%sp) |
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rts |
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fp_put_d4: |
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printf PREGISTER,"{d4<-%08x}",1,%d0 |
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| move.l %d0,%d4 |
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move.l %d0,(PT_OFF_D4+8,%sp) |
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rts |
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fp_put_d5: |
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printf PREGISTER,"{d5<-%08x}",1,%d0 |
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| move.l %d0,%d5 |
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move.l %d0,(PT_OFF_D5+8,%sp) |
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rts |
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fp_put_d6: |
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printf PREGISTER,"{d6<-%08x}",1,%d0 |
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move.l %d0,%d6 |
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rts |
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fp_put_d7: |
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printf PREGISTER,"{d7<-%08x}",1,%d0 |
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move.l %d0,%d7 |
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rts |
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fp_get_addr_reg: |
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jmp ([0f:w,%pc,%d0.w*4]) |
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.align 4 |
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0: |
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.long fp_get_a0, fp_get_a1 |
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.long fp_get_a2, fp_get_a3 |
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.long fp_get_a4, fp_get_a5 |
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.long fp_get_a6, fp_get_a7 |
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fp_get_a0: |
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move.l (PT_OFF_A0+8,%sp),%a0 |
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printf PREGISTER,"{a0->%08x}",1,%a0 |
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rts |
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fp_get_a1: |
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move.l (PT_OFF_A1+8,%sp),%a0 |
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printf PREGISTER,"{a1->%08x}",1,%a0 |
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rts |
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fp_get_a2: |
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move.l (PT_OFF_A2+8,%sp),%a0 |
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printf PREGISTER,"{a2->%08x}",1,%a0 |
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rts |
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fp_get_a3: |
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move.l %a3,%a0 |
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printf PREGISTER,"{a3->%08x}",1,%a0 |
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rts |
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fp_get_a4: |
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move.l %a4,%a0 |
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printf PREGISTER,"{a4->%08x}",1,%a0 |
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rts |
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fp_get_a5: |
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move.l %a5,%a0 |
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printf PREGISTER,"{a5->%08x}",1,%a0 |
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rts |
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fp_get_a6: |
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move.l %a6,%a0 |
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printf PREGISTER,"{a6->%08x}",1,%a0 |
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rts |
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fp_get_a7: |
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move.l %usp,%a0 |
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printf PREGISTER,"{a7->%08x}",1,%a0 |
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rts |
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fp_put_addr_reg: |
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jmp ([0f:w,%pc,%d0.w*4]) |
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.align 4 |
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0: |
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.long fp_put_a0, fp_put_a1 |
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.long fp_put_a2, fp_put_a3 |
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.long fp_put_a4, fp_put_a5 |
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.long fp_put_a6, fp_put_a7 |
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fp_put_a0: |
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printf PREGISTER,"{a0<-%08x}",1,%a0 |
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move.l %a0,(PT_OFF_A0+8,%sp) |
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rts |
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fp_put_a1: |
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printf PREGISTER,"{a1<-%08x}",1,%a0 |
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move.l %a0,(PT_OFF_A1+8,%sp) |
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rts |
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fp_put_a2: |
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printf PREGISTER,"{a2<-%08x}",1,%a0 |
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move.l %a0,(PT_OFF_A2+8,%sp) |
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rts |
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fp_put_a3: |
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printf PREGISTER,"{a3<-%08x}",1,%a0 |
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move.l %a0,%a3 |
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rts |
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fp_put_a4: |
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printf PREGISTER,"{a4<-%08x}",1,%a0 |
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move.l %a0,%a4 |
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rts |
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fp_put_a5: |
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printf PREGISTER,"{a5<-%08x}",1,%a0 |
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move.l %a0,%a5 |
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rts |
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fp_put_a6: |
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printf PREGISTER,"{a6<-%08x}",1,%a0 |
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move.l %a0,%a6 |
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rts |
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fp_put_a7: |
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printf PREGISTER,"{a7<-%08x}",1,%a0 |
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move.l %a0,%usp |
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rts |
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.data |
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.align 4 |
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fp_debugprint: |
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| .long PMDECODE |
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.long PMINSTR+PMDECODE+PMCONV+PMNORM |
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| .long PMCONV+PMNORM+PMINSTR |
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| .long 0
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