Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/include/asm-m68k/math-emu.h b/include/asm-m68k/math-emu.h
new file mode 100644
index 0000000..7ac6259
--- /dev/null
+++ b/include/asm-m68k/math-emu.h
@@ -0,0 +1,300 @@
+#ifndef _ASM_M68K_SETUP_H
+#define _ASM_M68K_SETUP_H
+
+#include <asm/setup.h>
+#include <linux/linkage.h>
+
+/* Status Register bits */
+
+/* accrued exception bits */
+#define FPSR_AEXC_INEX 3
+#define FPSR_AEXC_DZ 4
+#define FPSR_AEXC_UNFL 5
+#define FPSR_AEXC_OVFL 6
+#define FPSR_AEXC_IOP 7
+
+/* exception status bits */
+#define FPSR_EXC_INEX1 8
+#define FPSR_EXC_INEX2 9
+#define FPSR_EXC_DZ 10
+#define FPSR_EXC_UNFL 11
+#define FPSR_EXC_OVFL 12
+#define FPSR_EXC_OPERR 13
+#define FPSR_EXC_SNAN 14
+#define FPSR_EXC_BSUN 15
+
+/* quotient byte, assumes big-endian, of course */
+#define FPSR_QUOTIENT(fpsr) (*((signed char *) &(fpsr) + 1))
+
+/* condition code bits */
+#define FPSR_CC_NAN 24
+#define FPSR_CC_INF 25
+#define FPSR_CC_Z 26
+#define FPSR_CC_NEG 27
+
+
+/* Control register bits */
+
+/* rounding mode */
+#define FPCR_ROUND_RN 0 /* round to nearest/even */
+#define FPCR_ROUND_RZ 1 /* round to zero */
+#define FPCR_ROUND_RM 2 /* minus infinity */
+#define FPCR_ROUND_RP 3 /* plus infinity */
+
+/* rounding precision */
+#define FPCR_PRECISION_X 0 /* long double */
+#define FPCR_PRECISION_S 1 /* double */
+#define FPCR_PRECISION_D 2 /* float */
+
+
+/* Flags to select the debugging output */
+#define PDECODE 0
+#define PEXECUTE 1
+#define PCONV 2
+#define PNORM 3
+#define PREGISTER 4
+#define PINSTR 5
+#define PUNIMPL 6
+#define PMOVEM 7
+
+#define PMDECODE (1<<PDECODE)
+#define PMEXECUTE (1<<PEXECUTE)
+#define PMCONV (1<<PCONV)
+#define PMNORM (1<<PNORM)
+#define PMREGISTER (1<<PREGISTER)
+#define PMINSTR (1<<PINSTR)
+#define PMUNIMPL (1<<PUNIMPL)
+#define PMMOVEM (1<<PMOVEM)
+
+#ifndef __ASSEMBLY__
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+union fp_mant64 {
+ unsigned long long m64;
+ unsigned long m32[2];
+};
+
+union fp_mant128 {
+ unsigned long long m64[2];
+ unsigned long m32[4];
+};
+
+/* internal representation of extended fp numbers */
+struct fp_ext {
+ unsigned char lowmant;
+ unsigned char sign;
+ unsigned short exp;
+ union fp_mant64 mant;
+};
+
+/* C representation of FPU registers */
+/* NOTE: if you change this, you have to change the assembler offsets
+ below and the size in <asm/fpu.h>, too */
+struct fp_data {
+ struct fp_ext fpreg[8];
+ unsigned int fpcr;
+ unsigned int fpsr;
+ unsigned int fpiar;
+ unsigned short prec;
+ unsigned short rnd;
+ struct fp_ext temp[2];
+};
+
+#ifdef FPU_EMU_DEBUG
+extern unsigned int fp_debugprint;
+
+#define dprint(bit, fmt, args...) ({ \
+ if (fp_debugprint & (1 << (bit))) \
+ printk(fmt, ## args); \
+})
+#else
+#define dprint(bit, fmt, args...)
+#endif
+
+#define uprint(str) ({ \
+ static int __count = 3; \
+ \
+ if (__count > 0) { \
+ printk("You just hit an unimplemented " \
+ "fpu instruction (%s)\n", str); \
+ printk("Please report this to ....\n"); \
+ __count--; \
+ } \
+})
+
+#define FPDATA ((struct fp_data *)current->thread.fp)
+
+#else /* __ASSEMBLY__ */
+
+#define FPDATA %a2
+
+/* offsets from the base register to the floating point data in the task struct */
+#define FPD_FPREG (TASK_THREAD+THREAD_FPREG+0)
+#define FPD_FPCR (TASK_THREAD+THREAD_FPREG+96)
+#define FPD_FPSR (TASK_THREAD+THREAD_FPREG+100)
+#define FPD_FPIAR (TASK_THREAD+THREAD_FPREG+104)
+#define FPD_PREC (TASK_THREAD+THREAD_FPREG+108)
+#define FPD_RND (TASK_THREAD+THREAD_FPREG+110)
+#define FPD_TEMPFP1 (TASK_THREAD+THREAD_FPREG+112)
+#define FPD_TEMPFP2 (TASK_THREAD+THREAD_FPREG+124)
+#define FPD_SIZEOF (TASK_THREAD+THREAD_FPREG+136)
+
+/* offsets on the stack to access saved registers,
+ * these are only used during instruction decoding
+ * where we always know how deep we're on the stack.
+ */
+#define FPS_DO (PT_D0)
+#define FPS_D1 (PT_D1)
+#define FPS_D2 (PT_D2)
+#define FPS_A0 (PT_A0)
+#define FPS_A1 (PT_A1)
+#define FPS_A2 (PT_A2)
+#define FPS_SR (PT_SR)
+#define FPS_PC (PT_PC)
+#define FPS_EA (PT_PC+6)
+#define FPS_PC2 (PT_PC+10)
+
+.macro fp_get_fp_reg
+ lea (FPD_FPREG,FPDATA,%d0.w*4),%a0
+ lea (%a0,%d0.w*8),%a0
+.endm
+
+/* Macros used to get/put the current program counter.
+ * 020/030 use a different stack frame then 040/060, for the
+ * 040/060 the return pc points already to the next location,
+ * so this only needs to be modified for jump instructions.
+ */
+.macro fp_get_pc dest
+ move.l (FPS_PC+4,%sp),\dest
+.endm
+
+.macro fp_put_pc src,jump=0
+ move.l \src,(FPS_PC+4,%sp)
+.endm
+
+.macro fp_get_instr_data f,s,dest,label
+ getuser \f,%sp@(FPS_PC+4)@(0),\dest,\label,%sp@(FPS_PC+4)
+ addq.l #\s,%sp@(FPS_PC+4)
+.endm
+
+.macro fp_get_instr_word dest,label,addr
+ fp_get_instr_data w,2,\dest,\label,\addr
+.endm
+
+.macro fp_get_instr_long dest,label,addr
+ fp_get_instr_data l,4,\dest,\label,\addr
+.endm
+
+/* These macros are used to read from/write to user space
+ * on error we jump to the fixup section, load the fault
+ * address into %a0 and jump to the exit.
+ * (derived from <asm/uaccess.h>)
+ */
+.macro getuser size,src,dest,label,addr
+| printf ,"[\size<%08x]",1,\addr
+.Lu1\@: moves\size \src,\dest
+
+ .section .fixup,"ax"
+ .even
+.Lu2\@: move.l \addr,%a0
+ jra \label
+ .previous
+
+ .section __ex_table,"a"
+ .align 4
+ .long .Lu1\@,.Lu2\@
+ .previous
+.endm
+
+.macro putuser size,src,dest,label,addr
+| printf ,"[\size>%08x]",1,\addr
+.Lu1\@: moves\size \src,\dest
+.Lu2\@:
+
+ .section .fixup,"ax"
+ .even
+.Lu3\@: move.l \addr,%a0
+ jra \label
+ .previous
+
+ .section __ex_table,"a"
+ .align 4
+ .long .Lu1\@,.Lu3\@
+ .long .Lu2\@,.Lu3\@
+ .previous
+.endm
+
+
+.macro movestack nr,arg1,arg2,arg3,arg4,arg5
+ .if \nr
+ movestack (\nr-1),\arg2,\arg3,\arg4,\arg5
+ move.l \arg1,-(%sp)
+ .endif
+.endm
+
+.macro printf bit=-1,string,nr=0,arg1,arg2,arg3,arg4,arg5
+#ifdef FPU_EMU_DEBUG
+ .data
+.Lpdata\@:
+ .string "\string"
+ .previous
+
+ movem.l %d0/%d1/%a0/%a1,-(%sp)
+ .if \bit+1
+#if 0
+ moveq #\bit,%d0
+ andw #7,%d0
+ btst %d0,fp_debugprint+((31-\bit)/8)
+#else
+ btst #\bit,fp_debugprint+((31-\bit)/8)
+#endif
+ jeq .Lpskip\@
+ .endif
+ movestack \nr,\arg1,\arg2,\arg3,\arg4,\arg5
+ pea .Lpdata\@
+ jsr printk
+ lea ((\nr+1)*4,%sp),%sp
+.Lpskip\@:
+ movem.l (%sp)+,%d0/%d1/%a0/%a1
+#endif
+.endm
+
+.macro printx bit,fp
+#ifdef FPU_EMU_DEBUG
+ movem.l %d0/%a0,-(%sp)
+ lea \fp,%a0
+#if 0
+ moveq #'+',%d0
+ tst.w (%a0)
+ jeq .Lx1\@
+ moveq #'-',%d0
+.Lx1\@: printf \bit," %c",1,%d0
+ move.l (4,%a0),%d0
+ bclr #31,%d0
+ jne .Lx2\@
+ printf \bit,"0."
+ jra .Lx3\@
+.Lx2\@: printf \bit,"1."
+.Lx3\@: printf \bit,"%08x%08x",2,%d0,%a0@(8)
+ move.w (2,%a0),%d0
+ ext.l %d0
+ printf \bit,"E%04x",1,%d0
+#else
+ printf \bit," %08x%08x%08x",3,%a0@,%a0@(4),%a0@(8)
+#endif
+ movem.l (%sp)+,%d0/%a0
+#endif
+.endm
+
+.macro debug instr,args
+#ifdef FPU_EMU_DEBUG
+ \instr \args
+#endif
+.endm
+
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_M68K_SETUP_H */