1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_M68K_SETUP_H
3 #define _ASM_M68K_SETUP_H
6 #include <linux/linkage.h>
8 /* Status Register bits */
10 /* accrued exception bits */
11 #define FPSR_AEXC_INEX 3
12 #define FPSR_AEXC_DZ 4
13 #define FPSR_AEXC_UNFL 5
14 #define FPSR_AEXC_OVFL 6
15 #define FPSR_AEXC_IOP 7
17 /* exception status bits */
18 #define FPSR_EXC_INEX1 8
19 #define FPSR_EXC_INEX2 9
20 #define FPSR_EXC_DZ 10
21 #define FPSR_EXC_UNFL 11
22 #define FPSR_EXC_OVFL 12
23 #define FPSR_EXC_OPERR 13
24 #define FPSR_EXC_SNAN 14
25 #define FPSR_EXC_BSUN 15
27 /* quotient byte, assumes big-endian, of course */
28 #define FPSR_QUOTIENT(fpsr) (*((signed char *) &(fpsr) + 1))
30 /* condition code bits */
31 #define FPSR_CC_NAN 24
32 #define FPSR_CC_INF 25
34 #define FPSR_CC_NEG 27
37 /* Control register bits */
40 #define FPCR_ROUND_RN 0 /* round to nearest/even */
41 #define FPCR_ROUND_RZ 1 /* round to zero */
42 #define FPCR_ROUND_RM 2 /* minus infinity */
43 #define FPCR_ROUND_RP 3 /* plus infinity */
45 /* rounding precision */
46 #define FPCR_PRECISION_X 0 /* long double */
47 #define FPCR_PRECISION_S 1 /* double */
48 #define FPCR_PRECISION_D 2 /* float */
51 /* Flags to select the debugging output */
61 #define PMDECODE (1<<PDECODE)
62 #define PMEXECUTE (1<<PEXECUTE)
63 #define PMCONV (1<<PCONV)
64 #define PMNORM (1<<PNORM)
65 #define PMREGISTER (1<<PREGISTER)
66 #define PMINSTR (1<<PINSTR)
67 #define PMUNIMPL (1<<PUNIMPL)
68 #define PMMOVEM (1<<PMOVEM)
72 #include <linux/kernel.h>
73 #include <linux/sched.h>
76 unsigned long long m64;
81 unsigned long long m64[2];
85 /* internal representation of extended fp numbers */
87 unsigned char lowmant;
93 /* C representation of FPU registers */
94 /* NOTE: if you change this, you have to change the assembler offsets
95 below and the size in <asm/fpu.h>, too */
97 struct fp_ext fpreg[8];
103 struct fp_ext temp[2];
107 extern unsigned int fp_debugprint;
109 #define dprint(bit, fmt, ...) ({ \
110 if (fp_debugprint & (1 << (bit))) \
111 pr_info(fmt, ##__VA_ARGS__); \
114 #define dprint(bit, fmt, ...) no_printk(fmt, ##__VA_ARGS__)
117 #define uprint(str) ({ \
118 static int __count = 3; \
121 pr_err("You just hit an unimplemented " \
122 "fpu instruction (%s)\n", str); \
123 pr_err("Please report this to ....\n"); \
128 #define FPDATA ((struct fp_data *)current->thread.fp)
130 #else /* __ASSEMBLY__ */
134 /* offsets from the base register to the floating point data in the task struct */
135 #define FPD_FPREG (TASK_THREAD+THREAD_FPREG+0)
136 #define FPD_FPCR (TASK_THREAD+THREAD_FPREG+96)
137 #define FPD_FPSR (TASK_THREAD+THREAD_FPREG+100)
138 #define FPD_FPIAR (TASK_THREAD+THREAD_FPREG+104)
139 #define FPD_PREC (TASK_THREAD+THREAD_FPREG+108)
140 #define FPD_RND (TASK_THREAD+THREAD_FPREG+110)
141 #define FPD_TEMPFP1 (TASK_THREAD+THREAD_FPREG+112)
142 #define FPD_TEMPFP2 (TASK_THREAD+THREAD_FPREG+124)
143 #define FPD_SIZEOF (TASK_THREAD+THREAD_FPREG+136)
145 /* offsets on the stack to access saved registers,
146 * these are only used during instruction decoding
147 * where we always know how deep we're on the stack.
149 #define FPS_DO (PT_OFF_D0)
150 #define FPS_D1 (PT_OFF_D1)
151 #define FPS_D2 (PT_OFF_D2)
152 #define FPS_A0 (PT_OFF_A0)
153 #define FPS_A1 (PT_OFF_A1)
154 #define FPS_A2 (PT_OFF_A2)
155 #define FPS_SR (PT_OFF_SR)
156 #define FPS_PC (PT_OFF_PC)
157 #define FPS_EA (PT_OFF_PC+6)
158 #define FPS_PC2 (PT_OFF_PC+10)
161 lea (FPD_FPREG,FPDATA,%d0.w*4),%a0
162 lea (%a0,%d0.w*8),%a0
165 /* Macros used to get/put the current program counter.
166 * 020/030 use a different stack frame then 040/060, for the
167 * 040/060 the return pc points already to the next location,
168 * so this only needs to be modified for jump instructions.
170 .macro fp_get_pc dest
171 move.l (FPS_PC+4,%sp),\dest
174 .macro fp_put_pc src,jump=0
175 move.l \src,(FPS_PC+4,%sp)
178 .macro fp_get_instr_data f,s,dest,label
179 getuser \f,%sp@(FPS_PC+4)@(0),\dest,\label,%sp@(FPS_PC+4)
180 addq.l #\s,%sp@(FPS_PC+4)
183 .macro fp_get_instr_word dest,label,addr
184 fp_get_instr_data w,2,\dest,\label,\addr
187 .macro fp_get_instr_long dest,label,addr
188 fp_get_instr_data l,4,\dest,\label,\addr
191 /* These macros are used to read from/write to user space
192 * on error we jump to the fixup section, load the fault
193 * address into %a0 and jump to the exit.
194 * (derived from <asm/uaccess.h>)
196 .macro getuser size,src,dest,label,addr
197 | printf ,"[\size<%08x]",1,\addr
198 .Lu1\@: moves\size \src,\dest
202 .Lu2\@: move.l \addr,%a0
206 .section __ex_table,"a"
212 .macro putuser size,src,dest,label,addr
213 | printf ,"[\size>%08x]",1,\addr
214 .Lu1\@: moves\size \src,\dest
219 .Lu3\@: move.l \addr,%a0
223 .section __ex_table,"a"
230 /* work around binutils idiocy */
237 .macro getuser.\m src,dest,label,addr
238 getuser .\m,\src,\dest,\label,\addr
240 .macro putuser.\m src,dest,label,addr
241 putuser .\m,\src,\dest,\label,\addr
246 .macro movestack nr,arg1,arg2,arg3,arg4,arg5
248 movestack (\nr-1),\arg2,\arg3,\arg4,\arg5
253 .macro printf bit=-1,string,nr=0,arg1,arg2,arg3,arg4,arg5
260 movem.l %d0/%d1/%a0/%a1,-(%sp)
265 btst %d0,fp_debugprint+((31-\bit)/8)
267 btst #\bit,fp_debugprint+((31-\bit)/8)
271 movestack \nr,\arg1,\arg2,\arg3,\arg4,\arg5
274 lea ((\nr+1)*4,%sp),%sp
276 movem.l (%sp)+,%d0/%d1/%a0/%a1
282 movem.l %d0/%a0,-(%sp)
289 .Lx1\@: printf \bit," %c",1,%d0
295 .Lx2\@: printf \bit,"1."
296 .Lx3\@: printf \bit,"%08x%08x",2,%d0,%a0@(8)
299 printf \bit,"E%04x",1,%d0
301 printf \bit," %08x%08x%08x",3,%a0@,%a0@(4),%a0@(8)
303 movem.l (%sp)+,%d0/%a0
307 .macro debug instr,args
314 #endif /* __ASSEMBLY__ */
316 #endif /* _ASM_M68K_SETUP_H */