1 #ifndef _ASM_M68K_SETUP_H
2 #define _ASM_M68K_SETUP_H
5 #include <linux/linkage.h>
7 /* Status Register bits */
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
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
26 /* quotient byte, assumes big-endian, of course */
27 #define FPSR_QUOTIENT(fpsr) (*((signed char *) &(fpsr) + 1))
29 /* condition code bits */
30 #define FPSR_CC_NAN 24
31 #define FPSR_CC_INF 25
33 #define FPSR_CC_NEG 27
36 /* Control register bits */
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 */
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 */
50 /* Flags to select the debugging output */
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)
71 #include <linux/kernel.h>
72 #include <linux/sched.h>
75 unsigned long long m64;
80 unsigned long long m64[2];
84 /* internal representation of extended fp numbers */
86 unsigned char lowmant;
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 */
96 struct fp_ext fpreg[8];
102 struct fp_ext temp[2];
106 extern unsigned int fp_debugprint;
108 #define dprint(bit, fmt, args...) ({ \
109 if (fp_debugprint & (1 << (bit))) \
110 printk(fmt, ## args); \
113 #define dprint(bit, fmt, args...)
116 #define uprint(str) ({ \
117 static int __count = 3; \
120 printk("You just hit an unimplemented " \
121 "fpu instruction (%s)\n", str); \
122 printk("Please report this to ....\n"); \
127 #define FPDATA ((struct fp_data *)current->thread.fp)
129 #else /* __ASSEMBLY__ */
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)
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.
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)
160 lea (FPD_FPREG,FPDATA,%d0.w*4),%a0
161 lea (%a0,%d0.w*8),%a0
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.
169 .macro fp_get_pc dest
170 move.l (FPS_PC+4,%sp),\dest
173 .macro fp_put_pc src,jump=0
174 move.l \src,(FPS_PC+4,%sp)
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)
182 .macro fp_get_instr_word dest,label,addr
183 fp_get_instr_data w,2,\dest,\label,\addr
186 .macro fp_get_instr_long dest,label,addr
187 fp_get_instr_data l,4,\dest,\label,\addr
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>)
195 .macro getuser size,src,dest,label,addr
196 | printf ,"[\size<%08x]",1,\addr
197 .Lu1\@: moves\size \src,\dest
201 .Lu2\@: move.l \addr,%a0
205 .section __ex_table,"a"
211 .macro putuser size,src,dest,label,addr
212 | printf ,"[\size>%08x]",1,\addr
213 .Lu1\@: moves\size \src,\dest
218 .Lu3\@: move.l \addr,%a0
222 .section __ex_table,"a"
229 /* work around binutils idiocy */
236 .macro getuser.\m src,dest,label,addr
237 getuser .\m,\src,\dest,\label,\addr
239 .macro putuser.\m src,dest,label,addr
240 putuser .\m,\src,\dest,\label,\addr
245 .macro movestack nr,arg1,arg2,arg3,arg4,arg5
247 movestack (\nr-1),\arg2,\arg3,\arg4,\arg5
252 .macro printf bit=-1,string,nr=0,arg1,arg2,arg3,arg4,arg5
259 movem.l %d0/%d1/%a0/%a1,-(%sp)
264 btst %d0,fp_debugprint+((31-\bit)/8)
266 btst #\bit,fp_debugprint+((31-\bit)/8)
270 movestack \nr,\arg1,\arg2,\arg3,\arg4,\arg5
273 lea ((\nr+1)*4,%sp),%sp
275 movem.l (%sp)+,%d0/%d1/%a0/%a1
281 movem.l %d0/%a0,-(%sp)
288 .Lx1\@: printf \bit," %c",1,%d0
294 .Lx2\@: printf \bit,"1."
295 .Lx3\@: printf \bit,"%08x%08x",2,%d0,%a0@(8)
298 printf \bit,"E%04x",1,%d0
300 printf \bit," %08x%08x%08x",3,%a0@,%a0@(4),%a0@(8)
302 movem.l (%sp)+,%d0/%a0
306 .macro debug instr,args
313 #endif /* __ASSEMBLY__ */
315 #endif /* _ASM_M68K_SETUP_H */