code: 9ferno

ref: e81c54ba2ecc673a4d5f8aed0e9b52841fe07b0d
dir: /os/pc64/io.h/

enum {
	VectorDE	= 1,		/* debug exception */
	VectorNMI	= 2,		/* non-maskable interrupt */
	VectorBPT	= 3,		/* breakpoint */
	VectorUD	= 6,		/* invalid opcode exception */
	VectorCNA	= 7,		/* coprocessor not available */
	Vector2F	= 8,		/* double fault */
	VectorCSO	= 9,		/* coprocessor segment overrun */
	VectorSNP	= 11,		/* segment not present */
	VectorGPF	= 13,		/* general protection fault */
	VectorPF	= 14,		/* page fault */
	Vector15	= 15,		/* reserved */
	VectorCERR	= 16,		/* coprocessor error */
	VectorAC	= 17,		/* alignment check */
	VectorMC	= 18,		/* machine check */
	VectorSIMD	= 19,		/* simd error */

	VectorPIC	= 32,		/* external i8259 interrupts */
	IrqCLOCK	= 0,
	IrqKBD		= 1,
	IrqUART1	= 3,
	IrqUART0	= 4,
	IrqPCMCIA	= 5,
	IrqFLOPPY	= 6,
	IrqLPT		= 7,
	IrqIRQ7		= 7,
	IrqAUX		= 12,		/* PS/2 port */
	IrqIRQ13	= 13,		/* coprocessor on 386 */
	IrqATA0		= 14,
	IrqATA1		= 15,
	MaxIrqPIC	= 15,

	VectorLAPIC	= VectorPIC+16,	/* local APIC interrupts */
	IrqLINT0	= 16,		/* LINT[01] must be offsets 0 and 1 */
	IrqLINT1	= 17,
	IrqTIMER	= 18,
	IrqERROR	= 19,
	IrqPCINT	= 20,
	IrqSPURIOUS	= 31,		/* must have bits [3-0] == 0x0F */
	MaxIrqLAPIC	= 31,

	VectorSYSCALL	= 64,

	VectorAPIC	= 65,		/* external APIC interrupts */
	MaxVectorAPIC	= 255,
};

typedef struct Vctl {
	Vctl	*next;			/* handlers on this vector */

	void	(*f)(Ureg*, void*);	/* handler to call */
	void	*a;			/* argument to call it with */

	int	(*isr)(int);		/* get isr bit for this irq */
	int	(*eoi)(int);		/* eoi */

	int	(*enable)(Vctl*, int);
	int	(*disable)(Vctl*, int);
	void	*aux;

	int	irq;
	int	tbdf;
	int	vno;
	int	cpu;
	int	local;

	char	name[KNAMELEN];		/* of driver */
	/* inferno specific */
	int	isintr;			/* interrupt or fault/trap */
} Vctl;

enum {
	MaxEISA		= 16,
	CfgEISA		= 0xC80,
};

#define PCIWINDOW	0
#define PCIWADDR(va)	(PADDR(va)+PCIWINDOW)
#define ISAWINDOW	0
#define ISAWADDR(va)	(PADDR(va)+ISAWINDOW)

#define	BUSUNKNOWN	(-1)

/* SMBus transactions */
enum
{
	SMBquick,		/* sends address only */

	/* write */
	SMBsend,		/* sends address and cmd */
	SMBbytewrite,		/* sends address and cmd and 1 byte */
	SMBwordwrite,		/* sends address and cmd and 2 bytes */

	/* read */
	SMBrecv,		/* sends address, recvs 1 byte */
	SMBbyteread,		/* sends address and cmd, recv's byte */
	SMBwordread,		/* sends address and cmd, recv's 2 bytes */
};

typedef struct SMBus SMBus;
struct SMBus {
	QLock;		/* mutex */
	Rendez	r;	/* rendezvous point for completion interrupts */
	void	*arg;	/* implementation dependent */
	ulong	base;	/* port or memory base of smbus */
	int	busy;
	void	(*transact)(SMBus*, int, int, int, uchar*);
};

/*
 * PCMCIA support code.
 */

typedef struct PCMslot		PCMslot;
typedef struct PCMconftab	PCMconftab;

/*
 * Map between ISA memory space and PCMCIA card memory space.
 */
struct PCMmap {
	ulong	ca;			/* card address */
	ulong	cea;			/* card end address */
	ulong	isa;			/* ISA address */
	int	len;			/* length of the ISA area */
	int	attr;			/* attribute memory */
	int	ref;
};

/* configuration table entry */
struct PCMconftab
{
	int	index;
	ushort	irqs;		/* legal irqs */
	uchar	irqtype;
	uchar	bit16;		/* true for 16 bit access */
	struct {
		ulong	start;
		ulong	len;
	} io[16];
	int	nio;
	uchar	vpp1;
	uchar	vpp2;
	uchar	memwait;
	ulong	maxwait;
	ulong	readywait;
	ulong	otherwait;
};

/* a card slot */
struct PCMslot
{
	Lock;
	int	ref;

	void	*cp;		/* controller for this slot */
	long	memlen;		/* memory length */
	uchar	base;		/* index register base */
	uchar	slotno;		/* slot number */

	/* status */
	uchar	special;	/* in use for a special device */
	uchar	already;	/* already inited */
	uchar	occupied;
	uchar	battery;
	uchar	wrprot;
	uchar	powered;
	uchar	configed;
	uchar	enabled;
	uchar	busy;

	/* cis info */
	ulong	msec;		/* time of last slotinfo call */
	char	verstr[512];	/* version string */
	int	ncfg;		/* number of configurations */
	struct {
		ushort	cpresent;	/* config registers present */
		ulong	caddr;		/* relative address of config registers */
	} cfg[8];
	int	nctab;		/* number of config table entries */
	PCMconftab	ctab[8];
	PCMconftab	*def;	/* default conftab */

	/* memory maps */
	Lock	mlock;		/* lock down the maps */
	int	time;
	PCMmap	mmap[4];	/* maps, last is always for the kernel */
};