| /* |
| * fp_emu.S |
| * |
| * Copyright Roman Zippel, 1997. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, and the entire permission notice in its entirety, |
| * including the disclaimer of warranties. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * ALTERNATIVELY, this product may be distributed under the terms of |
| * the GNU General Public License, in which case the provisions of the GPL are |
| * required INSTEAD OF the above restrictions. (This clause is |
| * necessary due to a potential bad interaction between the GPL and |
| * the restrictions contained in a BSD-style copyright.) |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/linkage.h> |
| #include <asm/entry.h> |
| |
| #include "fp_emu.h" |
| |
| .globl fpu_emu |
| .globl fp_debugprint |
| .globl fp_err_ua1,fp_err_ua2 |
| |
| .text |
| fpu_emu: |
| SAVE_ALL_INT |
| GET_CURRENT(%d0) |
| |
| #if defined(CPU_M68020_OR_M68030) && defined(CPU_M68040_OR_M68060) |
| tst.l m68k_is040or060 |
| jeq 1f |
| #endif |
| #if defined(CPU_M68040_OR_M68060) |
| move.l (FPS_PC2,%sp),(FPS_PC,%sp) |
| #endif |
| 1: |
| | emulate the instruction |
| jsr fp_scan |
| |
| #if defined(CONFIG_M68060) |
| #if !defined(CPU_M68060_ONLY) |
| btst #3,m68k_cputype+3 |
| jeq 1f |
| #endif |
| btst #7,(FPS_SR,%sp) |
| jne fp_sendtrace060 |
| #endif |
| 1: |
| | emulation successful? |
| tst.l %d0 |
| jeq ret_from_exception |
| |
| | send some signal to program here |
| |
| jra ret_from_exception |
| |
| | we jump here after an access error while trying to access |
| | user space, we correct stackpointer and send a SIGSEGV to |
| | the user process |
| fp_err_ua2: |
| addq.l #4,%sp |
| fp_err_ua1: |
| addq.l #4,%sp |
| move.l %a0,-(%sp) |
| pea SEGV_MAPERR |
| pea SIGSEGV |
| jsr fpemu_signal |
| add.w #12,%sp |
| jra ret_from_exception |
| |
| #if defined(CONFIG_M68060) |
| | send a trace signal if we are debugged |
| | it does not really belong here, but... |
| fp_sendtrace060: |
| move.l (FPS_PC,%sp),-(%sp) |
| pea TRAP_TRACE |
| pea SIGTRAP |
| jsr fpemu_signal |
| add.w #12,%sp |
| jra ret_from_exception |
| #endif |
| |
| .globl fp_get_data_reg, fp_put_data_reg |
| .globl fp_get_addr_reg, fp_put_addr_reg |
| |
| | Entry points to get/put a register. Some of them can be get/put |
| | directly, others are on the stack, as we read/write the stack |
| | directly here, these function may only be called from within |
| | instruction decoding, otherwise the stack pointer is incorrect |
| | and the stack gets corrupted. |
| fp_get_data_reg: |
| jmp ([0f:w,%pc,%d0.w*4]) |
| |
| .align 4 |
| 0: |
| .long fp_get_d0, fp_get_d1 |
| .long fp_get_d2, fp_get_d3 |
| .long fp_get_d4, fp_get_d5 |
| .long fp_get_d6, fp_get_d7 |
| |
| fp_get_d0: |
| move.l (PT_D0+8,%sp),%d0 |
| printf PREGISTER,"{d0->%08x}",1,%d0 |
| rts |
| |
| fp_get_d1: |
| move.l (PT_D1+8,%sp),%d0 |
| printf PREGISTER,"{d1->%08x}",1,%d0 |
| rts |
| |
| fp_get_d2: |
| move.l (PT_D2+8,%sp),%d0 |
| printf PREGISTER,"{d2->%08x}",1,%d0 |
| rts |
| |
| fp_get_d3: |
| move.l %d3,%d0 |
| printf PREGISTER,"{d3->%08x}",1,%d0 |
| rts |
| |
| fp_get_d4: |
| move.l %d4,%d0 |
| printf PREGISTER,"{d4->%08x}",1,%d0 |
| rts |
| |
| fp_get_d5: |
| move.l %d5,%d0 |
| printf PREGISTER,"{d5->%08x}",1,%d0 |
| rts |
| |
| fp_get_d6: |
| move.l %d6,%d0 |
| printf PREGISTER,"{d6->%08x}",1,%d0 |
| rts |
| |
| fp_get_d7: |
| move.l %d7,%d0 |
| printf PREGISTER,"{d7->%08x}",1,%d0 |
| rts |
| |
| fp_put_data_reg: |
| jmp ([0f:w,%pc,%d1.w*4]) |
| |
| .align 4 |
| 0: |
| .long fp_put_d0, fp_put_d1 |
| .long fp_put_d2, fp_put_d3 |
| .long fp_put_d4, fp_put_d5 |
| .long fp_put_d6, fp_put_d7 |
| |
| fp_put_d0: |
| printf PREGISTER,"{d0<-%08x}",1,%d0 |
| move.l %d0,(PT_D0+8,%sp) |
| rts |
| |
| fp_put_d1: |
| printf PREGISTER,"{d1<-%08x}",1,%d0 |
| move.l %d0,(PT_D1+8,%sp) |
| rts |
| |
| fp_put_d2: |
| printf PREGISTER,"{d2<-%08x}",1,%d0 |
| move.l %d0,(PT_D2+8,%sp) |
| rts |
| |
| fp_put_d3: |
| printf PREGISTER,"{d3<-%08x}",1,%d0 |
| | move.l %d0,%d3 |
| move.l %d0,(PT_D3+8,%sp) |
| rts |
| |
| fp_put_d4: |
| printf PREGISTER,"{d4<-%08x}",1,%d0 |
| | move.l %d0,%d4 |
| move.l %d0,(PT_D4+8,%sp) |
| rts |
| |
| fp_put_d5: |
| printf PREGISTER,"{d5<-%08x}",1,%d0 |
| | move.l %d0,%d5 |
| move.l %d0,(PT_D5+8,%sp) |
| rts |
| |
| fp_put_d6: |
| printf PREGISTER,"{d6<-%08x}",1,%d0 |
| move.l %d0,%d6 |
| rts |
| |
| fp_put_d7: |
| printf PREGISTER,"{d7<-%08x}",1,%d0 |
| move.l %d0,%d7 |
| rts |
| |
| fp_get_addr_reg: |
| jmp ([0f:w,%pc,%d0.w*4]) |
| |
| .align 4 |
| 0: |
| .long fp_get_a0, fp_get_a1 |
| .long fp_get_a2, fp_get_a3 |
| .long fp_get_a4, fp_get_a5 |
| .long fp_get_a6, fp_get_a7 |
| |
| fp_get_a0: |
| move.l (PT_A0+8,%sp),%a0 |
| printf PREGISTER,"{a0->%08x}",1,%a0 |
| rts |
| |
| fp_get_a1: |
| move.l (PT_A1+8,%sp),%a0 |
| printf PREGISTER,"{a1->%08x}",1,%a0 |
| rts |
| |
| fp_get_a2: |
| move.l (PT_A2+8,%sp),%a0 |
| printf PREGISTER,"{a2->%08x}",1,%a0 |
| rts |
| |
| fp_get_a3: |
| move.l %a3,%a0 |
| printf PREGISTER,"{a3->%08x}",1,%a0 |
| rts |
| |
| fp_get_a4: |
| move.l %a4,%a0 |
| printf PREGISTER,"{a4->%08x}",1,%a0 |
| rts |
| |
| fp_get_a5: |
| move.l %a5,%a0 |
| printf PREGISTER,"{a5->%08x}",1,%a0 |
| rts |
| |
| fp_get_a6: |
| move.l %a6,%a0 |
| printf PREGISTER,"{a6->%08x}",1,%a0 |
| rts |
| |
| fp_get_a7: |
| move.l %usp,%a0 |
| printf PREGISTER,"{a7->%08x}",1,%a0 |
| rts |
| |
| fp_put_addr_reg: |
| jmp ([0f:w,%pc,%d0.w*4]) |
| |
| .align 4 |
| 0: |
| .long fp_put_a0, fp_put_a1 |
| .long fp_put_a2, fp_put_a3 |
| .long fp_put_a4, fp_put_a5 |
| .long fp_put_a6, fp_put_a7 |
| |
| fp_put_a0: |
| printf PREGISTER,"{a0<-%08x}",1,%a0 |
| move.l %a0,(PT_A0+8,%sp) |
| rts |
| |
| fp_put_a1: |
| printf PREGISTER,"{a1<-%08x}",1,%a0 |
| move.l %a0,(PT_A1+8,%sp) |
| rts |
| |
| fp_put_a2: |
| printf PREGISTER,"{a2<-%08x}",1,%a0 |
| move.l %a0,(PT_A2+8,%sp) |
| rts |
| |
| fp_put_a3: |
| printf PREGISTER,"{a3<-%08x}",1,%a0 |
| move.l %a0,%a3 |
| rts |
| |
| fp_put_a4: |
| printf PREGISTER,"{a4<-%08x}",1,%a0 |
| move.l %a0,%a4 |
| rts |
| |
| fp_put_a5: |
| printf PREGISTER,"{a5<-%08x}",1,%a0 |
| move.l %a0,%a5 |
| rts |
| |
| fp_put_a6: |
| printf PREGISTER,"{a6<-%08x}",1,%a0 |
| move.l %a0,%a6 |
| rts |
| |
| fp_put_a7: |
| printf PREGISTER,"{a7<-%08x}",1,%a0 |
| move.l %a0,%usp |
| rts |
| |
| .data |
| .align 4 |
| |
| fp_debugprint: |
| | .long PMDECODE |
| .long PMINSTR+PMDECODE+PMCONV+PMNORM |
| | .long PMCONV+PMNORM+PMINSTR |
| | .long 0 |