[9front] ppc kernel attempt

[9front] ppc kernel attempt

[Jacob Moody]

Out of curiosity I got the ppc kernel to build.
I tried getting it to run in qemu-ppc(emulating a g4 mac)
but I could not get past open firmware. I'll admit that I've
since lost interest. Before I delete these changes from my
tree I figure I would offer it up to someone else.

Asking around I am not quite sure anyone has had evidence
of this working. Perhaps it may be better to delete this?

Thanks,
moody

diff 26e42d115979009c9fe144e1c28f740485537674 uncommitted
--- a//sys/src/9/ppc/blast
+++ b//sys/src/9/ppc/blast
@@ -13,6 +13,7 @@
 	kprof
 	uart
 	irq
+	shr

 	ether		netif
 	ip		arp chandial ip ipv6 ipaux iproute netif netlog nullmedium pktmedium inferno
--- a//sys/src/9/ppc/blast.h
+++ b//sys/src/9/ppc/blast.h
@@ -40,6 +40,7 @@
 #define	MEM2SIZE	0
 #define	FPGABASE		0xe0000000
 #define	FPGASIZE		0x01000000
+#define	PTECACHED	0

 #define	PLAN9INI		0x00460000

--- a//sys/src/9/ppc/clock.c
+++ b//sys/src/9/ppc/clock.c
@@ -86,3 +86,9 @@
 {
 	return (ulong)fastticks(nil);
 }
+
+ulong
+µs(void)
+{
+	return fastticks2us(fastticks(nil));
+}
--- a//sys/src/9/ppc/dat.h
+++ b//sys/src/9/ppc/dat.h
@@ -37,6 +37,7 @@
 	ulong	sr;
 	ulong	pc;
 	Proc	*p;
+	Mach	*m;
 	ulong	pid;
 	ushort	isilock;
 };
--- a//sys/src/9/ppc/devirq.c
+++ b//sys/src/9/ppc/devirq.c
@@ -302,7 +302,7 @@
 			iomem->simr_h, iomem->simr_l,
 			iomem->sipnr_h, iomem->sipnr_l,
 			iomem->siexr, iomem->siprr);
-		dumpvno();
+		/* dumpvno(); */
 	}
 	poperror();
 	free(cb);
--- a//sys/src/9/ppc/fns.h
+++ b//sys/src/9/ppc/fns.h
@@ -1,5 +1,8 @@
 #include "../port/portfns.h"

+ulong	cankaddr(ulong);
+int	(*cmpswap)(long*, long, long);
+int	cmpswapppc(long*,long,long);
 void	clockinit(void);
 void	clockintr(Ureg*);
 void	cpuidprint(void);
--- a//sys/src/9/ppc/l.s
+++ b//sys/src/9/ppc/l.s
@@ -1014,3 +1014,22 @@
 	MOVW	R12, 4(R3)
 	MOVW	R13, 0(R3)
 	RETURN
+
+TEXT	cmpswapppc+0(SB),0,$0
+	MOVW	ov+4(FP),R4
+	MOVW	nv+8(FP),R8
+	LWAR	(R3),R5
+	CMP	R5,R4
+	BNE	fail
+	DCBT	(R3)				/* fix 405 errata cpu_210 */
+	STWCCC	R8,(R3)
+	BNE	fail1
+	MOVW	$1,R3
+	RETURN
+fail:
+	DCBT	(R3)				/* fix 405 errata cpu_210 */
+	STWCCC	R5,(R3)	/* give up exclusive access */
+fail1:
+	MOVW	R0,R3
+	RETURN
+	END
--- a//sys/src/9/ppc/m8260.c
+++ b//sys/src/9/ppc/m8260.c
@@ -131,6 +131,7 @@
 	m->imap = (Imap*)INTMEM;

 	m->loopconst = 1096;
+	cmpswap = cmpswapppc;

 	/* Make sure Ethernet is disabled (boot code may have buffers allocated anywhere in memory) */
 	iomem->fcc[0].gfmr &= ~(BIT(27)|BIT(26));
@@ -398,7 +399,7 @@
 }

 void
-timerset(uvlong next)
+timerset(Tval next)
 {
 	long offset;
 	uvlong now;
--- a//sys/src/9/ppc/mem.h
+++ b//sys/src/9/ppc/mem.h
@@ -225,3 +225,5 @@
 #define	IOMEM		(INTMEM+0x10000)

 #define getpgcolor(a)	0
+#define MIN(a, b)	((a) < (b)? (a): (b))
+#define	MS2HZ		(1000/HZ)		/* millisec per clock tick */
--- a//sys/src/9/ppc/mkfile
+++ b//sys/src/9/ppc/mkfile
@@ -33,6 +33,7 @@
 	segment.$O\
 	sysfile.$O\
 	sysproc.$O\
+	userinit.$O\
 	taslock.$O\
 	tod.$O\
 	xalloc.$O\
@@ -60,6 +61,7 @@
 	/$objtype/lib/libmemlayer.a\
 	/$objtype/lib/libmemdraw.a\
 	/$objtype/lib/libdraw.a\
+	/$objtype/lib/libip.a\
 	/$objtype/lib/libc.a\
 	/$objtype/lib/libsec.a\

--- a//sys/src/9/ppc/msaturn.c
+++ b//sys/src/9/ppc/msaturn.c
@@ -117,6 +117,7 @@
 	m->imap = (Imap*)INTMEM;

 	m->loopconst = 1096;
+	cmpswap = cmpswapppc;

 	rrate = (*(ushort*)Syscfg >> 6) & 3;
 	switch(rrate){
--- a//sys/src/9/ppc/saturntimer.c
+++ b//sys/src/9/ppc/saturntimer.c
@@ -72,7 +72,7 @@
 }

 void
-timerset(uvlong next)
+timerset(Tval next)
 {
 	ulong offset;
 	uvlong now;
--- a//sys/src/9/ppc/trap.c
+++ b//sys/src/9/ppc/trap.c
@@ -153,8 +153,10 @@
 	ecode = (ureg->cause >> 8) & 0xff;
 	switch(ecode) {
 	case CEI:
+		/* External interrupt - FIXME
 		m->intr++;
 		intr(ureg);
+		*/
 		break;
 	case CDEC:
 		clockintr(ureg);
--- a//sys/src/9/ppc/ucu
+++ b//sys/src/9/ppc/ucu
@@ -10,10 +10,11 @@
 	cap
 	kprof
 	uart
+	shr
+	swap

 	ether		netif
 	ip		arp chandial ip ipv6 ipaux iproute netif netlog nullmedium pktmedium inferno
-	ce

 link
 	ethersaturn
@@ -31,6 +32,7 @@
 	ipifc
 	icmp
 	icmp6
+	netlog

 port
 	int cpuserver = 1;