1#ifndef _ASM_M68K_SETUP_H 2#define _ASM_M68K_SETUP_H 3 4#include <asm/setup.h> 5#include <linux/linkage.h> 6 7/* Status Register bits */ 8 9/* accrued exception bits */ 10#define FPSR_AEXC_INEX 3 11#define FPSR_AEXC_DZ 4 12#define FPSR_AEXC_UNFL 5 13#define FPSR_AEXC_OVFL 6 14#define FPSR_AEXC_IOP 7 15 16/* exception status bits */ 17#define FPSR_EXC_INEX1 8 18#define FPSR_EXC_INEX2 9 19#define FPSR_EXC_DZ 10 20#define FPSR_EXC_UNFL 11 21#define FPSR_EXC_OVFL 12 22#define FPSR_EXC_OPERR 13 23#define FPSR_EXC_SNAN 14 24#define FPSR_EXC_BSUN 15 25 26/* quotient byte, assumes big-endian, of course */ 27#define FPSR_QUOTIENT(fpsr) (*((signed char *) &(fpsr) + 1)) 28 29/* condition code bits */ 30#define FPSR_CC_NAN 24 31#define FPSR_CC_INF 25 32#define FPSR_CC_Z 26 33#define FPSR_CC_NEG 27 34 35 36/* Control register bits */ 37 38/* rounding mode */ 39#define FPCR_ROUND_RN 0 /* round to nearest/even */ 40#define FPCR_ROUND_RZ 1 /* round to zero */ 41#define FPCR_ROUND_RM 2 /* minus infinity */ 42#define FPCR_ROUND_RP 3 /* plus infinity */ 43 44/* rounding precision */ 45#define FPCR_PRECISION_X 0 /* long double */ 46#define FPCR_PRECISION_S 1 /* double */ 47#define FPCR_PRECISION_D 2 /* float */ 48 49 50/* Flags to select the debugging output */ 51#define PDECODE 0 52#define PEXECUTE 1 53#define PCONV 2 54#define PNORM 3 55#define PREGISTER 4 56#define PINSTR 5 57#define PUNIMPL 6 58#define PMOVEM 7 59 60#define PMDECODE (1<<PDECODE) 61#define PMEXECUTE (1<<PEXECUTE) 62#define PMCONV (1<<PCONV) 63#define PMNORM (1<<PNORM) 64#define PMREGISTER (1<<PREGISTER) 65#define PMINSTR (1<<PINSTR) 66#define PMUNIMPL (1<<PUNIMPL) 67#define PMMOVEM (1<<PMOVEM) 68 69#ifndef __ASSEMBLY__ 70 71#include <linux/kernel.h> 72#include <linux/sched.h> 73 74union fp_mant64 { 75 unsigned long long m64; 76 unsigned long m32[2]; 77}; 78 79union fp_mant128 { 80 unsigned long long m64[2]; 81 unsigned long m32[4]; 82}; 83 84/* internal representation of extended fp numbers */ 85struct fp_ext { 86 unsigned char lowmant; 87 unsigned char sign; 88 unsigned short exp; 89 union fp_mant64 mant; 90}; 91 92/* C representation of FPU registers */ 93/* NOTE: if you change this, you have to change the assembler offsets 94 below and the size in <asm/fpu.h>, too */ 95struct fp_data { 96 struct fp_ext fpreg[8]; 97 unsigned int fpcr; 98 unsigned int fpsr; 99 unsigned int fpiar; 100 unsigned short prec; 101 unsigned short rnd; 102 struct fp_ext temp[2]; 103}; 104 105#ifdef FPU_EMU_DEBUG 106extern unsigned int fp_debugprint; 107 108#define dprint(bit, fmt, args...) ({ \ 109 if (fp_debugprint & (1 << (bit))) \ 110 printk(fmt, ## args); \ 111}) 112#else 113#define dprint(bit, fmt, args...) 114#endif 115 116#define uprint(str) ({ \ 117 static int __count = 3; \ 118 \ 119 if (__count > 0) { \ 120 printk("You just hit an unimplemented " \ 121 "fpu instruction (%s)\n", str); \ 122 printk("Please report this to ....\n"); \ 123 __count--; \ 124 } \ 125}) 126 127#define FPDATA ((struct fp_data *)current->thread.fp) 128 129#else /* __ASSEMBLY__ */ 130 131#define FPDATA %a2 132 133/* offsets from the base register to the floating point data in the task struct */ 134#define FPD_FPREG (TASK_THREAD+THREAD_FPREG+0) 135#define FPD_FPCR (TASK_THREAD+THREAD_FPREG+96) 136#define FPD_FPSR (TASK_THREAD+THREAD_FPREG+100) 137#define FPD_FPIAR (TASK_THREAD+THREAD_FPREG+104) 138#define FPD_PREC (TASK_THREAD+THREAD_FPREG+108) 139#define FPD_RND (TASK_THREAD+THREAD_FPREG+110) 140#define FPD_TEMPFP1 (TASK_THREAD+THREAD_FPREG+112) 141#define FPD_TEMPFP2 (TASK_THREAD+THREAD_FPREG+124) 142#define FPD_SIZEOF (TASK_THREAD+THREAD_FPREG+136) 143 144/* offsets on the stack to access saved registers, 145 * these are only used during instruction decoding 146 * where we always know how deep we're on the stack. 147 */ 148#define FPS_DO (PT_OFF_D0) 149#define FPS_D1 (PT_OFF_D1) 150#define FPS_D2 (PT_OFF_D2) 151#define FPS_A0 (PT_OFF_A0) 152#define FPS_A1 (PT_OFF_A1) 153#define FPS_A2 (PT_OFF_A2) 154#define FPS_SR (PT_OFF_SR) 155#define FPS_PC (PT_OFF_PC) 156#define FPS_EA (PT_OFF_PC+6) 157#define FPS_PC2 (PT_OFF_PC+10) 158 159.macro fp_get_fp_reg 160 lea (FPD_FPREG,FPDATA,%d0.w*4),%a0 161 lea (%a0,%d0.w*8),%a0 162.endm 163 164/* Macros used to get/put the current program counter. 165 * 020/030 use a different stack frame then 040/060, for the 166 * 040/060 the return pc points already to the next location, 167 * so this only needs to be modified for jump instructions. 168 */ 169.macro fp_get_pc dest 170 move.l (FPS_PC+4,%sp),\dest 171.endm 172 173.macro fp_put_pc src,jump=0 174 move.l \src,(FPS_PC+4,%sp) 175.endm 176 177.macro fp_get_instr_data f,s,dest,label 178 getuser \f,%sp@(FPS_PC+4)@(0),\dest,\label,%sp@(FPS_PC+4) 179 addq.l #\s,%sp@(FPS_PC+4) 180.endm 181 182.macro fp_get_instr_word dest,label,addr 183 fp_get_instr_data w,2,\dest,\label,\addr 184.endm 185 186.macro fp_get_instr_long dest,label,addr 187 fp_get_instr_data l,4,\dest,\label,\addr 188.endm 189 190/* These macros are used to read from/write to user space 191 * on error we jump to the fixup section, load the fault 192 * address into %a0 and jump to the exit. 193 * (derived from <asm/uaccess.h>) 194 */ 195.macro getuser size,src,dest,label,addr 196| printf ,"[\size<%08x]",1,\addr 197.Lu1\@: moves\size \src,\dest 198 199 .section .fixup,"ax" 200 .even 201.Lu2\@: move.l \addr,%a0 202 jra \label 203 .previous 204 205 .section __ex_table,"a" 206 .align 4 207 .long .Lu1\@,.Lu2\@ 208 .previous 209.endm 210 211.macro putuser size,src,dest,label,addr 212| printf ,"[\size>%08x]",1,\addr 213.Lu1\@: moves\size \src,\dest 214.Lu2\@: 215 216 .section .fixup,"ax" 217 .even 218.Lu3\@: move.l \addr,%a0 219 jra \label 220 .previous 221 222 .section __ex_table,"a" 223 .align 4 224 .long .Lu1\@,.Lu3\@ 225 .long .Lu2\@,.Lu3\@ 226 .previous 227.endm 228 229/* work around binutils idiocy */ 230old_gas=-1 231.irp gas_ident.x .x 232old_gas=old_gas+1 233.endr 234.if !old_gas 235.irp m b,w,l 236.macro getuser.\m src,dest,label,addr 237 getuser .\m,\src,\dest,\label,\addr 238.endm 239.macro putuser.\m src,dest,label,addr 240 putuser .\m,\src,\dest,\label,\addr 241.endm 242.endr 243.endif 244 245.macro movestack nr,arg1,arg2,arg3,arg4,arg5 246 .if \nr 247 movestack (\nr-1),\arg2,\arg3,\arg4,\arg5 248 move.l \arg1,-(%sp) 249 .endif 250.endm 251 252.macro printf bit=-1,string,nr=0,arg1,arg2,arg3,arg4,arg5 253#ifdef FPU_EMU_DEBUG 254 .data 255.Lpdata\@: 256 .string "\string" 257 .previous 258 259 movem.l %d0/%d1/%a0/%a1,-(%sp) 260 .if \bit+1 261#if 0 262 moveq #\bit,%d0 263 andw #7,%d0 264 btst %d0,fp_debugprint+((31-\bit)/8) 265#else 266 btst #\bit,fp_debugprint+((31-\bit)/8) 267#endif 268 jeq .Lpskip\@ 269 .endif 270 movestack \nr,\arg1,\arg2,\arg3,\arg4,\arg5 271 pea .Lpdata\@ 272 jsr printk 273 lea ((\nr+1)*4,%sp),%sp 274.Lpskip\@: 275 movem.l (%sp)+,%d0/%d1/%a0/%a1 276#endif 277.endm 278 279.macro printx bit,fp 280#ifdef FPU_EMU_DEBUG 281 movem.l %d0/%a0,-(%sp) 282 lea \fp,%a0 283#if 0 284 moveq #'+',%d0 285 tst.w (%a0) 286 jeq .Lx1\@ 287 moveq #'-',%d0 288.Lx1\@: printf \bit," %c",1,%d0 289 move.l (4,%a0),%d0 290 bclr #31,%d0 291 jne .Lx2\@ 292 printf \bit,"0." 293 jra .Lx3\@ 294.Lx2\@: printf \bit,"1." 295.Lx3\@: printf \bit,"%08x%08x",2,%d0,%a0@(8) 296 move.w (2,%a0),%d0 297 ext.l %d0 298 printf \bit,"E%04x",1,%d0 299#else 300 printf \bit," %08x%08x%08x",3,%a0@,%a0@(4),%a0@(8) 301#endif 302 movem.l (%sp)+,%d0/%a0 303#endif 304.endm 305 306.macro debug instr,args 307#ifdef FPU_EMU_DEBUG 308 \instr \args 309#endif 310.endm 311 312 313#endif /* __ASSEMBLY__ */ 314 315#endif /* _ASM_M68K_SETUP_H */ 316