1990/11211/port/devboot.c (diff list | history)

1990/11211/sys/src/9/port/devboot.c:1,122 – 1990/1127/sys/src/9/port/devboot.c:1,124 (short | long | prev | next)
1990/0424		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "errno.h" #include "devtab.h" enum{ Qdir, Qboot, Qmem, }; Dirtab bootdir[]={ "boot", Qboot, 0, 0666, "mem", Qmem, 0, 0666,
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) { return devattach('b', spec); } 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) {
1990/11211		error(Eperm);
1990/0424		} /* * sysremove() knows this is a nop */ void bootclose(Chan *c) { } long bootread(Chan *c, void *buf, long n) { switch(c->qid & ~CHDIR){
1990/1127		switch(c->qid.path & ~CHDIR){
1990/0424		case Qdir: return devdirread(c, buf, n, bootdir, NBOOT, devgen); }
1990/11211		error(Egreg);
1990/0424		} long bootwrite(Chan *c, void *buf, long n) { ulong pc; switch(c->qid & ~CHDIR){
1990/1127		switch(c->qid.path & ~CHDIR){
1990/0424		case Qmem: /* kernel memory. BUG: shouldn't be so easygoing. BUG: mem mapping? */ if(c->offset>=KZERO && c->offset<KZERO+conf.npage*BY2PG){ /* print("%ux, %d\n", c->offset, n);/**/ if(c->offset+n > KZERO+conf.npage*BY2PG) n = KZERO+conf.npage*BY2PG - c->offset; memcpy((char*)c->offset, buf, n); return n; }
1990/1127		print("bootwrite: bad addr %lux\n", c->offset);
1990/11211		error(Ebadarg);
1990/0424		case Qboot: pc = *(ulong*)buf; splhi(); gotopc(pc); }
1990/1127		print("bootwrite: bad path %d\n", c->qid.path);
1990/11211		error(Ebadarg);
1990/0424		} void bootremove(Chan *c) {
1990/11211		error(Eperm);
1990/0424		} void bootwstat(Chan *c, char *dp) {
1990/11211		error(Eperm);
1990/0424		}