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 74 union fp_mant64 { 75 unsigned long long m64; 76 unsigned long m32[2]; 77 }; 78 79 union fp_mant128 { 80 unsigned long long m64[2]; 81 unsigned long m32[4]; 82 }; 83 84 /* internal representation of extended fp numbers */ 85 struct 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 */ 95 struct 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 #if FPU_EMU_DEBUG 106 extern 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_D0) 149 #define FPS_D1 (PT_D1) 150 #define FPS_D2 (PT_D2) 151 #define FPS_A0 (PT_A0) 152 #define FPS_A1 (PT_A1) 153 #define FPS_A2 (PT_A2) 154 #define FPS_SR (PT_SR) 155 #define FPS_PC (PT_PC) 156 #define FPS_EA (PT_PC+6) 157 #define FPS_PC2 (PT_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 228 229 230 .macro movestack nr,arg1,arg2,arg3,arg4,arg5 231 .if \nr 232 movestack (\nr-1),\arg2,\arg3,\arg4,\arg5 233 move.l \arg1,-(%sp) 234 .endif 235 .endm 236 237 .macro printf bit=-1,string,nr=0,arg1,arg2,arg3,arg4,arg5 238 #ifdef FPU_EMU_DEBUG 239 .data 240 .Lpdata\@: 241 .string "\string" 242 .previous 243 244 movem.l %d0/%d1/%a0/%a1,-(%sp) 245 .if \bit+1 246 #if 0 247 moveq #\bit,%d0 248 andw #7,%d0 249 btst %d0,fp_debugprint+((31-\bit)/8) 250 #else 251 btst #\bit,fp_debugprint+((31-\bit)/8) 252 #endif 253 jeq .Lpskip\@ 254 .endif 255 movestack \nr,\arg1,\arg2,\arg3,\arg4,\arg5 256 pea .Lpdata\@ 257 jsr printk 258 lea ((\nr+1)*4,%sp),%sp 259 .Lpskip\@: 260 movem.l (%sp)+,%d0/%d1/%a0/%a1 261 #endif 262 .endm 263 264 .macro printx bit,fp 265 #ifdef FPU_EMU_DEBUG 266 movem.l %d0/%a0,-(%sp) 267 lea \fp,%a0 268 #if 0 269 moveq #'+',%d0 270 tst.w (%a0) 271 jeq .Lx1\@ 272 moveq #'-',%d0 273 .Lx1\@: printf \bit," %c",1,%d0 274 move.l (4,%a0),%d0 275 bclr #31,%d0 276 jne .Lx2\@ 277 printf \bit,"0." 278 jra .Lx3\@ 279 .Lx2\@: printf \bit,"1." 280 .Lx3\@: printf \bit,"%08x%08x",2,%d0,%a0@(8) 281 move.w (2,%a0),%d0 282 ext.l %d0 283 printf \bit,"E%04x",1,%d0 284 #else 285 printf \bit," %08x%08x%08x",3,%a0@,%a0@(4),%a0@(8) 286 #endif 287 movem.l (%sp)+,%d0/%a0 288 #endif 289 .endm 290 291 .macro debug instr,args 292 #ifdef FPU_EMU_DEBUG 293 \instr \args 294 #endif 295 .endm 296 297 298 #endif /* __ASSEMBLY__ */ 299 300 #endif /* _ASM_M68K_SETUP_H */ 301