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/*
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 * bcm2835 (e.g. raspberry pi) architecture-specific stuff
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 */
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#include "u.h"
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#include "../port/lib.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "../port/error.h"
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#include "io.h"
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#include "arm.h"
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#include "../port/netif.h"
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#include "etherif.h"
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#define	POWERREGS	(VIRTIO+0x100000)
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enum {
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	Wdogfreq	= 65536,
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	Wdogtime	= 5,	/* seconds, ≤ 15 */
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};
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/*
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 * Power management / watchdog registers
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 */
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enum {
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	Rstc		= 0x1c>>2,
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		Password	= 0x5A<<24,
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		CfgMask		= 0x03<<4,
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		CfgReset	= 0x02<<4,
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	Rsts		= 0x20>>2,
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	Wdog		= 0x24>>2,
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};
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void
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archreset(void)
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{
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	fpon();
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}
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void
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archreboot(void)
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{
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	u32int *r;
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	r = (u32int*)POWERREGS;
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	r[Wdog] = Password | 1;
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	r[Rstc] = Password | (r[Rstc] & ~CfgMask) | CfgReset;
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	coherence();
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	for(;;)
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		;
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}
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static void
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wdogfeed(void)
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{
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	u32int *r;
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	r = (u32int*)POWERREGS;
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	r[Wdog] = Password | (Wdogtime * Wdogfreq);
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	r[Rstc] = Password | (r[Rstc] & ~CfgMask) | CfgReset;
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}
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void
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wdogoff(void)
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{
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	u32int *r;
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	r = (u32int*)POWERREGS;
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	r[Rstc] = Password | (r[Rstc] & ~CfgMask);
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}
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void
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cpuidprint(void)
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{
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	print("cpu%d: %dMHz ARM1176JZF-S\n", m->machno, m->cpumhz);
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}
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void
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archbcmlink(void)
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{
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	addclock0link(wdogfeed, HZ);
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}
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int
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archether(unsigned ctlrno, Ether *ether)
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{
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	switch(ctlrno) {
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	case 0:
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		ether->type = "usb";
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		ether->ctlrno = ctlrno;
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		ether->irq = -1;
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		ether->nopt = 0;
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		ether->mbps = 100;
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		return 1;
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	}
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	return -1;
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}
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