From e5c017a49314be5f066657384899d71867fe0873 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Fri, 28 Aug 1992 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1992-08-28

---
 boot/dosboot.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++
 power/clock.c  |  5 ++--
 power/mem.h    |  2 +-
 3 files changed, 81 insertions(+), 3 deletions(-)
 create mode 100644 boot/dosboot.c

diff --git a/boot/dosboot.c b/boot/dosboot.c
new file mode 100644
index 0000000000000000000000000000000000000000..85f50a788c21054095f92fc3c7e9e771d3fbd50f
--- /dev/null
+++ b/boot/dosboot.c
@@ -0,0 +1,77 @@
+#include <u.h>
+#include <libc.h>
+#include "../boot/boot.h"
+
+int	printcol;
+
+static void	dossrv(void);
+static void	swapproc(void);
+
+void
+dosboot(void)
+{
+	int fd;
+
+	open("#c/cons", OREAD);
+	open("#c/cons", OWRITE);
+	open("#c/cons", OWRITE);
+
+	/*
+	 *  start to dos file system server
+	 */
+	dossrv();
+	sleep(1000);
+	fd = open("#s/boot", ORDWR);
+	if(fd < 0)
+		fatal("open #s/boot");
+
+	/*
+	 *  pick a floppy and mount it as root
+	 */
+	if(bind("/", "/", MREPL) < 0)
+		fatal("bind");
+	if(mount(fd, "/", MAFTER|MCREATE, "#f/fd0disk", "") < 0)
+		if(mount(fd, "/", MAFTER|MCREATE, "#f/fd1disk", "") < 0)
+			if(mount(fd, "/", MAFTER|MCREATE, "#w/hd0dos", "") < 0)
+				fatal("mount");
+	close(fd);
+
+	settime(1);
+	swapproc();
+
+	execl("/386/init", "init", "-mt", 0);
+	fatal("/386/init");
+}
+
+static void
+dossrv(void)
+{
+	print("dossrv...");
+	if(bind("#c", "/dev", MREPL) < 0)
+		fatal("bind #c");
+	if(bind("#p", "/proc", MREPL) < 0)
+		fatal("bind #p");
+	switch(fork()){
+	case -1:
+		fatal("fork");
+	case 0:
+		execl("/cfs", "cfs", "boot", 0);
+		fatal("can't exec cfs");
+	default:
+		break;
+	}
+}
+
+static void
+swapproc(void)
+{
+	int fd;
+
+	fd = open("#c/swap", OWRITE);
+	if(fd < 0){
+		warning("opening #c/swap");
+		return;
+	}
+	if(write(fd, "start", 5) <= 0)
+		warning("starting swap kproc");
+}
diff --git a/power/clock.c b/power/clock.c
index 541b578e315abfc2997daa6f3df1c99f49f354bb..af95cf84e46c834603655cbede38870d172e4486 100644
--- a/power/clock.c
+++ b/power/clock.c
@@ -115,14 +115,15 @@ clock(Ureg *ur)
 		checkalarms();
 		kproftimer(ur->pc);
 		if(u && (ur->status&IEP) && u->p->state==Running){
-			if(anyready()){
+			if(anyready()) {
 				if(u->p->hasspin)
 					u->p->hasspin = 0;	/* just in case */
 				else
 					sched();
 			}
+			/* user profiling clock */
 			if(ur->status & KUP)
-				(*(ulong*)(USTKTOP-BY2WD)) += TK2MS(1);	/* profiling clock */
+				(*(ulong*)(USTKTOP-BY2WD)) += TK2MS(1);	
 		}
 		return;
 	}
diff --git a/power/mem.h b/power/mem.h
index 63d80fe332fea63ea89a8aaee2f9091082cc2f15..3bf43f9349777bc2ce86dc2270f4d3734ec22dd7 100644
--- a/power/mem.h
+++ b/power/mem.h
@@ -101,7 +101,7 @@
 #define PTERONLY	0
 #define	PTEPID(n)	((n)<<6)
 #define TLBPID(n)	(((n)>>6)&0x3F)
-#define PTEMAPMEM	(1024*1024)	
+#define PTEMAPMEM	(2*1024*1024)	
 #define	PTEPERTAB	(PTEMAPMEM/BY2PG)
 #define STLBLOG		13
 #define STLBSIZE	(1<<STLBLOG)