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#include "u.h"
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#include "../port/lib.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "io.h"
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#include "ureg.h"
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#define DBG	if(0)scrprint
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#pragma varargck argpos scrprint 1
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static Ureg ureg;
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static void
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scrprint(char *fmt, ...)
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{
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	char buf[128];
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	va_list va;
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	int n;
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	va_start(va, fmt);
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	n = vseprint(buf, buf+sizeof buf, fmt, va)-buf;
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	va_end(va);
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	putstrn(buf, n);
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}
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static char*
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getline(void)
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{
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	static char buf[128];
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	int i, c;
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	for(;;){
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		for(i=0; i<nelem(buf) && (c=uartgetc()) != '\n'; i++){
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			DBG("%c...", c);
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			buf[i] = c;
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		}
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		if(i < nelem(buf)){
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			buf[i] = 0;
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			return buf;
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		}
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	}
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}
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static void*
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addr(char *s, Ureg *ureg, char **p)
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{
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	ulong a;
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	a = strtoul(s, p, 16);
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	if(a < sizeof(Ureg))
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		return ((uchar*)ureg)+a;
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	return (void*)a;
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}
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static void
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talkrdb(Ureg *ureg)
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{
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	uchar *a;
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	char *p, *req;
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	serialoq = nil;		/* turn off serial console */
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	kprintoq = nil;		/* turn off /dev/kprint if active */
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//	scrprint("Plan 9 debugger\n");
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	iprint("Edebugger reset\n");
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	for(;;){
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		req = getline();
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		switch(*req){
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		case 'r':
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			a = addr(req+1, ureg, nil);
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			DBG("read %p\n", a);
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			iprint("R%.8lux %.2ux %.2ux %.2ux %.2ux\n",
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				strtoul(req+1, 0, 16), a[0], a[1], a[2], a[3]);
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			break;
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		case 'w':
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			a = addr(req+1, ureg, &p);
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			*(ulong*)a = strtoul(p, nil, 16);
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			iprint("W\n");
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			break;
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/*
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 *		case Tmput:
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			n = min[4];
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			if(n > 4){
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				mesg(Rerr, Ecount);
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				break;
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			}
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			a = addr(min+0);
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			scrprint("mput %.8lux\n", a);
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			memmove(a, min+5, n);
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			mesg(Rmput, mout);
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			break;
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 *
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 */
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		default:
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			DBG("unknown %c\n", *req);
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			iprint("Eunknown message\n");
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			break;
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		}
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	}
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}
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void
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rdb(void)
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{
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	splhi();
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	iprint("rdb...");
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	callwithureg(talkrdb);
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}