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1999/0501/alphapc/arch164.c (diff list | history)

alphapc/arch164.c on 1999/0415
1999/0415    
/* 
 *	EB164 and similar 
 *	CPU:	21164 
 *	Core Logic: 21172 CIA or 21174 PYXIS 
  */ 
#include	"u.h" 
#include	"../port/lib.h" 
#include	"mem.h" 
#include	"dat.h" 
#include	"fns.h" 
#include	"io.h" 
#include	"ureg.h" 
 
static ulong *core; 
static ulong *wind; 
 
static ulong windsave[16]; 
static ulong coresave[1]; 
 
ulong	iobase0; 
ulong	iobase1; 
#define	iobase(p)	(iobase0+(p)) 
 
static int 
ident(void) 
{ 
	return 0;	/* bug! */ 
}
1999/0424    
static uvlong* sgmap; 
 
static void 
sginit(void) 
{ 
	ulong pa; 
	uvlong *pte; 
 
	sgmap = xspanalloc(BY2PG, BY2PG, 0); 
	memset(sgmap, 0, BY2PG); 
 
	pte = sgmap; 
	for(pa = 0; pa < 8*1024*1024; pa += BY2PG) 
		*pte++ = ((pa>>PGSHIFT)<<1)|1;
1999/0501    
	wind[0x400/4] = ISAWINDOW|4|2|1;
1999/0424    
	wind[0x440/4] = 0x00700000; 
	wind[0x480/4] = PADDR(sgmap); 
}
1999/0415    
static void * 
kmapio(ulong space, ulong offset, int size) 
{ 
	return kmapv(((uvlong)space<<32LL)|offset, size); 
} 
 
static void 
coreinit(void) 
{ 
	int i; 
 
	core = kmapio(0x87, 0x40000000, 0x10000); 
	wind = kmapio(0x87, 0x60000000, 0x1000); 
 
	iobase0 = (ulong)kmapio(0x89, 0, 0x20000); 
 
	/* hae_io = core[0x440/4]; 
	iobase1 = (ulong)kmapio(0x89, hae_io, 0x10000); */ 
 
	/* save critical parts of hardware memory mapping */ 
	for (i = 4; i < 8; i++) { 
		windsave[4*(i-4)+0] = wind[(i*0x100+0x00)/4]; 
		windsave[4*(i-4)+1] = wind[(i*0x100+0x40)/4]; 
		windsave[4*(i-4)+2] = wind[(i*0x100+0x80)/4]; 
	} 
	coresave[0] = core[0x140/4];
1999/0424    
	/* disable windows */ 
	wind[0x400/4] = 0; 
	wind[0x500/4] = 0; 
	wind[0x600/4] = 0; 
	wind[0x700/4] = 0;
1999/0423    
	/* direct map bottom 1G PCI target space to KZERO in window 1 */ 
	wind[0x500/4] = PCIWINDOW|1; 
	wind[0x540/4] = 0x3ff00000;
1999/0415    
	wind[0x580/4] = 0;
1999/0424    
sginit();
1999/0415    
 
	/* clear error state */ 
	core[0x8200/4] = 0x7ff; 
 
	/* set config: byte/word enable, no monster window, etc. */
1999/0501    
	core[0x140/4] = 0x21;
1999/0415    
 
	/* turn off mcheck on master abort.  now we can probe PCI space. */ 
	core[0x8280/4] &= ~(1<<7); 
 
	/* set up interrupts. */ 
	i8259init(); 
	cserve(52, 4);		/* enable SIO interrupt */
1999/0501    
} 
 
void 
ciaerror(void) 
{ 
	print("cia error 0x%luX\n", core[0x8200/4]);
1999/0415    
} 
 
static void 
corehello(void) 
{ 
	print("cpu%d: CIA revision %d; cnfg %lux cntrl %lux\n", 
			0,	/* BUG */ 
			core[0x80/4] & 0x7f, core[0x140/4], core[0x100/4]); 
	print("cpu%d: HAE_IO %lux\n", 0, core[0x440/4]); 
	print("\n"); 
} 
 
static void 
coredetach(void) 
{ 
	int i; 
 
	for (i = 4; i < 8; i++) { 
		wind[(i*0x100+0x00)/4] = windsave[4*(i-4)+0]; 
		wind[(i*0x100+0x40)/4] = windsave[4*(i-4)+1]; 
		wind[(i*0x100+0x80)/4] = windsave[4*(i-4)+2]; 
	} 
	core[0x140/4] = coresave[0]; 
/*	for (i = 0; i < 4; i++) 
		if (i != 4) 
			cserve(53, i);		/* disable interrupts */ 
} 
 
static Lock	pcicfgl; 
static ulong	pcimap[256]; 
 
static void* 
pcicfg2117x(int tbdf, int rno) 
{ 
	int space, bus; 
	ulong base; 
 
	bus = BUSBNO(tbdf); 
	lock(&pcicfgl); 
	base = pcimap[bus]; 
	if (base == 0) { 
		if(bus) 
			space = 0x8B; 
		else 
			space = 0x8A; 
		pcimap[bus] = base = (ulong)kmapio(space, MKBUS(0, bus, 0, 0), (1<<16)); 
	} 
	unlock(&pcicfgl); 
	return (void*)(base + BUSDF(tbdf) + rno); 
} 
 
static void* 
pcimem2117x(int addr, int len) 
{ 
	return kmapio(0x88, addr, len); 
} 
 
/* 
 *	interrupts -- adapted from PC, needs work. 
 */ 
 
static Lock irqctllock; 
static Irqctl *irqctl[256]; 
static char irqmask[3]; 
 
static void 
intr164(Ureg *ur) 
{ 
	int i, v; 
	Irqctl *ctl; 
	Irq *irq; 
	Mach *mach; 
 
	v = (ulong)ur->a1>>4; 
	if (v < 0x80) { 
		iprint("unknown device intr v %d\n", v); 
		return; 
	} 
	v -= 0x80; 
	if(v < 256 && (ctl = irqctl[v])){ 
		if(ctl->isintr){ 
			m->intr++; 
			if(ctl->isr) 
				ctl->isr(v); 
/*				if(v >= VectorPIC && v <= MaxVectorPIC) 
				m->lastintr = v-VectorPIC; */ 
		} 
 
		for(irq = ctl->irq; irq; irq = irq->next) 
			irq->f(ur, irq->a); 
 
		if(ctl->eoi) 
			ctl->eoi(v); 
	} 
	else if(v >= VectorPIC && v <= MaxVectorPIC){ 
		/* 
		 * An unknown interrupt. 
		 * Check for a default IRQ7. This can happen when 
		 * the IRQ input goes away before the acknowledge. 
		 * In this case, a 'default IRQ7' is generated, but 
		 * the corresponding bit in the ISR isn't set. 
		 * In fact, just ignore all such interrupts. 
		 */ 
		iprint("cpu%d: spurious interrupt %d, last %d", 
			m->machno, v-VectorPIC, 0 /*m->lastintr*/); 
		for(i = 0; i < 32; i++){ 
			if(!(active.machs & (1<<i))) 
				continue; 
			mach = MACHP(i); 
			if(m->machno == mach->machno) 
				continue; 
			iprint(": cpu%d: last %d", mach->machno, 0 /*mach->lastintr*/); 
		} 
		iprint("\n"); 
/*			m->spuriousintr++; */ 
		return; 
	} 
	else{ 
		dumpregs(ur); 
		panic("unknown intr: %d\n", v); /* */ 
	} 
} 
 
static int 
intrenable164(int v, void (*f)(Ureg*, void*), void*a, int tbdf) 
{ 
	Irq * irq; 
	Irqctl *ctl; 
 
	lock(&irqctllock); 
	if(irqctl[v] == 0){ 
		ctl = xalloc(sizeof(Irqctl)); 
/* this is all wrong; FIXME! */ 
		if(BUSTYPE(tbdf) == BusPCI) 
			cserve(52, v-VectorPCI); 
		else if(v >= VectorPIC && i8259enable(v, tbdf, ctl) == -1){ 
			unlock(&irqctllock); 
			iprint("intrenable: didn't find v %d, tbdf 0x%uX\n", v, tbdf); 
			xfree(ctl); 
			return -1; 
		} 
		irqctl[v] = ctl; 
	} 
	ctl = irqctl[v]; 
	irq = xalloc(sizeof(Irq)); 
	irq->f = f; 
	irq->a = a; 
	irq->next = ctl->irq; 
	ctl->irq = irq; 
	unlock(&irqctllock); 
	return 0; 
} 
 
/* 
 *	I have a function pointer in PCArch for every one of these, because on 
 *	some Alphas we have to use sparse mode, but on others we can use 
 *	MOVB et al.  Additionally, the PC164 documentation threatened us 
 *	with the lie that the SIO is in region B, but everything else in region A. 
 *	This turned out not to be the case.  Given the cost of this solution, it 
 *	may be better just to use sparse mode for I/O space on all platforms. 
 */ 
int 
inb2117x(int port) 
{ 
	mb(); 
	return *(uchar*)(iobase(port)); 
} 
 
ushort 
ins2117x(int port) 
{ 
	mb(); 
	return *(ushort*)(iobase(port)); 
} 
 
ulong 
inl2117x(int port) 
{ 
	mb(); 
	return *(ulong*)(iobase(port)); 
} 
 
void 
outb2117x(int port, int val) 
{ 
	mb(); 
	*(uchar*)(iobase(port)) = val;
1999/0423    
	mb();
1999/0415    
} 
 
void 
outs2117x(int port, ushort val) 
{ 
	mb(); 
	*(ushort*)(iobase(port)) = val;
1999/0423    
	mb();
1999/0415    
} 
 
void 
outl2117x(int port, ulong val) 
{ 
	mb(); 
	*(ulong*)(iobase(port)) = val;
1999/0423    
	mb();
1999/0415    
} 
 
void 
insb2117x(int port, void *buf, int len) 
{ 
	int i; 
	uchar *p, *q; 
 
	p = (uchar*)iobase(port); 
	q = buf; 
	for(i = 0; i < len; i++){ 
		mb(); 
		*q++ = *p; 
	} 
} 
 
void 
inss2117x(int port, void *buf, int len) 
{ 
	int i; 
	ushort *p, *q; 
 
	p = (ushort*)iobase(port); 
	q = buf; 
	for(i = 0; i < len; i++){ 
		mb(); 
		*q++ = *p; 
	} 
} 
 
void 
insl2117x(int port, void *buf, int len) 
{ 
	int i; 
	ulong *p, *q; 
 
	p = (ulong*)iobase(port); 
	q = buf; 
	for(i = 0; i < len; i++){ 
		mb(); 
		*q++ = *p; 
	} 
} 
 
void 
outsb2117x(int port, void *buf, int len) 
{ 
	int i; 
	uchar *p, *q; 
 
	p = (uchar*)iobase(port); 
	q = buf; 
	for(i = 0; i < len; i++){ 
		mb(); 
		*p = *q++; 
	} 
} 
 
void 
outss2117x(int port, void *buf, int len) 
{ 
	int i; 
	ushort *p, *q; 
 
	p = (ushort*)iobase(port); 
	q = buf; 
	for(i = 0; i < len; i++){ 
		mb(); 
		*p = *q++; 
	} 
} 
 
void 
outsl2117x(int port, void *buf, int len) 
{ 
	int i; 
	ulong *p, *q; 
 
	p = (ulong*)iobase(port); 
	q = buf; 
	for(i = 0; i < len; i++){ 
		mb(); 
		*p = *q++; 
	} 
} 
 
PCArch arch164 = { 
	"EB164", 
	ident, 
	coreinit, 
	corehello, 
	coredetach, 
	pcicfg2117x, 
	pcimem2117x, 
	intr164, 
	intrenable164, 
 
	inb2117x, 
	ins2117x, 
	inl2117x, 
	outb2117x, 
	outs2117x, 
	outl2117x, 
	insb2117x, 
	inss2117x, 
	insl2117x, 
	outsb2117x, 
	outss2117x, 
	outsl2117x, 
};


source code copyright © 1990-2005 Lucent Technologies; see license
Plan 9 distribution
comments to russ cox (rsc@swtch.com)