1992/0711/port/devboot.c (diff list | history)

port/devboot.c on 1990/0424
1990/0424		#include "u.h"
1992/0321		#include "../port/lib.h"
1990/0424		#include "mem.h" #include "dat.h" #include "fns.h"
1992/0111		#include "../port/error.h"
1990/0424		#include "devtab.h" enum{ Qdir, Qboot, Qmem, }; Dirtab bootdir[]={
1990/1127		"boot", {Qboot}, 0, 0666, "mem", {Qmem}, 0, 0666,
1990/0424		}; #define NBOOT (sizeof bootdir/sizeof(Dirtab)) void bootreset(void) { } void bootinit(void) { } Chan* bootattach(char *spec) {
1992/0522		return devattach('B', spec);
1990/0424		} Chan* bootclone(Chan *c, Chan *nc) { return devclone(c, nc); } int bootwalk(Chan *c, char *name) { return devwalk(c, name, bootdir, NBOOT, devgen); } void bootstat(Chan *c, char *dp) { devstat(c, dp, bootdir, NBOOT, devgen); } Chan* bootopen(Chan *c, int omode) { return devopen(c, omode, bootdir, NBOOT, devgen); } void bootcreate(Chan *c, char *name, int omode, ulong perm) {
1992/0711		USED(c, name, omode, perm);
1990/11211		error(Eperm);
1990/0424		} void bootclose(Chan *c) {
1992/0320		USED(c);
1990/0424		} long
1991/0411		bootread(Chan *c, void *buf, long n, ulong offset)
1990/0424		{
1990/1127		switch(c->qid.path & ~CHDIR){
1992/0625
1990/0424		case Qdir: return devdirread(c, buf, n, bootdir, NBOOT, devgen);
1992/0625		case Qmem: /* kernel memory */ if(offset>=KZERO && offset<KZERO+conf.npage*BY2PG){ if(offset+n > KZERO+conf.npage*BY2PG) n = KZERO+conf.npage*BY2PG - offset; memmove(buf, (char*)offset, n); return n; } error(Ebadarg);
1990/0424		}
1990/11211		error(Egreg);
1992/0522		return 0; /* not reached */
1990/0424		} long
1991/0411		bootwrite(Chan *c, void *buf, long n, ulong offset)
1990/0424		{ ulong pc;
1990/1127		switch(c->qid.path & ~CHDIR){
1990/0424		case Qmem:
1991/1206		/* kernel memory */
1991/0411		if(offset>=KZERO && offset<KZERO+conf.npage*BY2PG){ if(offset+n > KZERO+conf.npage*BY2PG) n = KZERO+conf.npage*BY2PG - offset; memmove((char*)offset, buf, n);
1990/0424		return n; }
1990/11211		error(Ebadarg);
1990/0424		case Qboot: pc = *(ulong*)buf; splhi(); gotopc(pc); }
1990/11211		error(Ebadarg);
1992/0522		return 0; /* not reached */
1990/0424		} void bootremove(Chan *c) {
1992/0320		USED(c);
1990/11211		error(Eperm);
1990/0424		} void bootwstat(Chan *c, char *dp) {
1992/0711		USED(c, dp);
1990/11211		error(Eperm);
1990/0424		}