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removing tos from fpimips

--- a/sys/src/9/mt7688/fpimips.c

+++ b/sys/src/9/mt7688/fpimips.c

@@ -30,7 +30,7 @@

 #include	"fns.h"

 #include	"ureg.h"

 #include	"fpi.h"

-#include	"tos.h"

+//#include	"tos.h"

 #ifdef FPEMUDEBUG

 #define DBG(bits) (fpemudebug & (bits))

@@ -799,7 +799,7 @@

 dsexec(Instr *ip, Ureg *ur, FPsave *ufp)

 {

 	ulong dsaddr, wpaddr;

-	Tos *tos;

+//	Tos *tos;

 	/*

 	 * copy delay slot, EHB, EHB, EHB to tos->kscr, flush caches,

@@ -809,19 +809,27 @@

 	 * executed at any address.

 	 */

 	dsaddr = ip->pc + 4;

-	tos = (Tos*)(USTKTOP-sizeof(Tos));

-	tos->kscr[0] = *(ulong *)dsaddr;

-	tos->kscr[1] = 0xc0;		/* EHB; we could use some trap instead */

-	tos->kscr[2] = 0xc0;			/* EHB */

-	tos->kscr[3] = 0xc0;			/* EHB */

-	dcflush(tos->kscr, sizeof tos->kscr);

-	icflush(tos->kscr, sizeof tos->kscr);

+//	tos = (Tos*)(USTKTOP-sizeof(Tos));

+//	tos->kscr[0] = *(ulong *)dsaddr;

+//	tos->kscr[1] = 0xc0;		/* EHB; we could use some trap instead */

+//	tos->kscr[2] = 0xc0;			/* EHB */

+//	tos->kscr[3] = 0xc0;			/* EHB */

+//	dcflush(tos->kscr, sizeof tos->kscr);

+//	icflush(tos->kscr, sizeof tos->kscr);

-	wpaddr = (ulong)&tos->kscr[2] & ~7;	/* clear I/R/W bits */

+	ufp->kscr[0] = *(ulong *)dsaddr;

+	ufp->kscr[1] = 0xc0;		/* EHB; we could use some trap instead */

+	ufp->kscr[2] = 0xc0;			/* EHB */

+	ufp->kscr[3] = 0xc0;			/* EHB */

+	dcflush(ufp->kscr, sizeof ufp->kscr);

+	icflush(ufp->kscr, sizeof ufp->kscr);

+

+

+	wpaddr = (ulong)&ufp->kscr[2] & ~7;	/* clear I/R/W bits */

 	ufp->fpdelayexec = 1;

 	ufp->fpdelaypc = ip->pc;		/* remember branch ip->pc */

 	ufp->fpdelaysts = ufp->fpstatus;	/* remember state of FPCOND */

-	ur->pc = (ulong)tos->kscr;		/* restart in tos */

+	ur->pc = (ulong)ufp->kscr;		/* restart in tos */

 	qlock(&watchlock);			/* wait for first watchpoint */

 	setwatchlo0(wpaddr | 1<<2);	/* doubleword addr(!); i-fetches only */

 	setwatchhi0(TLBPID(tlbvirt())<<16);	/* asid; see mmu.c */