bcm64: add config for raspberry pi 4

sys/src/9/bcm64/archbcm4.c

@@ -0,0 +1,175 @@
+/*
+ * bcm2711 (e.g.raspberry pi 4) architecture-specific stuff
+ */
+
+#include "u.h"
+#include "../port/lib.h"
+#include "mem.h"
+#include "dat.h"
+#include "fns.h"
+#include "../port/error.h"
+#include "io.h"
+#include "sysreg.h"
+
+typedef struct Mbox Mbox;
+typedef struct Mboxes Mboxes;
+
+#define	POWERREGS	(VIRTIO+0x100000)
+
+Soc soc = {
+	.dramsize	= 0x40000000,
+	.busdram	= 0xC0000000,
+	.iosize		= 0x03000000,
+	.busio		= 0x7C000000,
+	.physio		= 0xFC000000,
+	.virtio		= VIRTIO2,
+	.armlocal	= 0xFF800000,
+	.pciwin		= 0x0600000000ULL,
+};
+
+enum {
+	Wdogfreq	= 65536,
+	Wdogtime	= 10,	/* seconds, ≤ 15 */
+};
+
+/*
+ * Power management / watchdog registers
+ */
+enum {
+	Rstc		= 0x1c>>2,
+		Password	= 0x5A<<24,
+		CfgMask		= 0x03<<4,
+		CfgReset	= 0x02<<4,
+	Rsts		= 0x20>>2,
+	Wdog		= 0x24>>2,
+};
+
+/*
+ * Arm local regs for smp
+ */
+struct Mbox {
+	u32int	doorbell;
+	u32int	mbox1;
+	u32int	mbox2;
+	u32int	startcpu;
+};
+struct Mboxes {
+	Mbox	set[4];
+	Mbox	clr[4];
+};
+
+enum {
+	Mboxregs	= 0x80,
+};
+
+void
+archreset(void)
+{
+}
+
+void
+archreboot(void)
+{
+	u32int *r;
+
+	r = (u32int*)POWERREGS;
+	r[Wdog] = Password | 1;
+	r[Rstc] = Password | (r[Rstc] & ~CfgMask) | CfgReset;
+	coherence();
+	for(;;)
+		;
+}
+
+void
+wdogfeed(void)
+{
+	u32int *r;
+
+	r = (u32int*)POWERREGS;
+	r[Wdog] = Password | (Wdogtime * Wdogfreq);
+	r[Rstc] = Password | (r[Rstc] & ~CfgMask) | CfgReset;
+}
+
+void
+wdogoff(void)
+{
+	u32int *r;
+
+	r = (u32int*)POWERREGS;
+	r[Rstc] = Password | (r[Rstc] & ~CfgMask);
+}
+
+
+char *
+cputype2name(char *buf, int size)
+{
+	u32int r, part;
+	char *p;
+
+	r = sysrd(MIDR_EL1);
+	part = (r >> 4) & 0xFFF;
+	switch(part){
+	case 0xc07:
+		p = seprint(buf, buf + size, "Cortex-A7");
+		break;
+	case 0xd03:
+		p = seprint(buf, buf + size, "Cortex-A53");
+		break;
+	case 0xd08:
+		p = seprint(buf, buf + size, "Cortex-A72");
+		break;
+	default:
+		p = seprint(buf, buf + size, "Unknown-%#x", part);
+		break;
+	}
+	seprint(p, buf + size, " r%udp%ud", (r >> 20) & 0xF, r & 0xF);
+	return buf;
+}
+
+void
+cpuidprint(void)
+{
+	char name[64];
+
+	cputype2name(name, sizeof name);
+	iprint("cpu%d: %dMHz ARM %s\n", m->machno, m->cpumhz, name);
+}
+
+int
+getncpus(void)
+{
+	int n, max;
+	char *p;
+
+	n = 4;
+	if(n > MAXMACH)
+		n = MAXMACH;
+	p = getconf("*ncpu");
+	if(p && (max = atoi(p)) > 0 && n > max)
+		n = max;
+	return n;
+}
+
+void
+mboxclear(uint cpu)
+{
+	Mboxes *mb;
+
+	mb = (Mboxes*)(ARMLOCAL + Mboxregs);
+	mb->clr[cpu].mbox1 = 1;
+}
+
+void
+wakecpu(uint cpu)
+{
+	Mboxes *mb;
+
+	mb = (Mboxes*)(ARMLOCAL + Mboxregs);
+	mb->set[cpu].mbox1 = 1;
+}
+
+void
+archbcm4link(void)
+{
+	// addclock0link(wdogfeed, HZ);
+}

sys/src/9/bcm64/mkfile

@@ -1,5 +1,5 @@
 CONF=pi3
-CONFLIST=pi3
+CONFLIST=pi3 pi4
 
 loadaddr=0xffffffffc0080000
 

sys/src/9/bcm64/pi4

@@ -0,0 +1,63 @@
+dev
+	root
+	cons
+	swap
+	env
+	pipe
+	proc
+	mnt
+	srv
+	shr
+	dup
+	arch
+	ssl
+	tls
+	cap
+	fs
+	ether	netif
+	ip		arp chandial ip ipv6 ipaux iproute netlog nullmedium pktmedium inferno
+	draw	screen swcursor
+	mouse	mouse
+	uart	gpio
+#	gpio	gpio
+	sd
+	usb
+	dtracy
+
+link
+	gisb
+	pci
+	archbcm4
+	ethergenet	ethermii
+	ethermedium
+	loopbackmedium
+	usbxhci		pci
+
+ip
+	tcp
+	udp
+	il
+	ipifc
+	icmp
+	icmp6
+	ipmux
+
+misc
+	uartmini
+	uartpl011
+#	sdmmc	emmc
+	dma
+	gic
+	vcore
+
+	dtracysys
+	dtracytimer
+
+port
+	int cpuserver = 0;
+
+bootdir
+	/$objtype/bin/paqfs
+	/$objtype/bin/auth/factotum
+	bootfs.paq
+	boot