/* $Id: openprom.h,v 1.24 2000/06/04 06:23:53 anton Exp $ */
#ifndef __SPARC_OPENPROM_H
#define __SPARC_OPENPROM_H

/* openprom.h:  Prom structures and defines for access to the OPENBOOT
 *              prom routines and data areas.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#include <asm/vaddrs.h>

/* Empirical constants... */
#define	LINUX_OPPROM_MAGIC      0x10010407

#ifndef __ASSEMBLY__
/* V0 prom device operations. */
struct linux_dev_v0_funcs {
	int (*v0_devopen)(char *device_str);
	int (*v0_devclose)(int dev_desc);
	int (*v0_rdblkdev)(int dev_desc, int num_blks, int blk_st, char *buf);
	int (*v0_wrblkdev)(int dev_desc, int num_blks, int blk_st, char *buf);
	int (*v0_wrnetdev)(int dev_desc, int num_bytes, char *buf);
	int (*v0_rdnetdev)(int dev_desc, int num_bytes, char *buf);
	int (*v0_rdchardev)(int dev_desc, int num_bytes, int dummy, char *buf);
	int (*v0_wrchardev)(int dev_desc, int num_bytes, int dummy, char *buf);
	int (*v0_seekdev)(int dev_desc, long logical_offst, int from);
};

/* V2 and later prom device operations. */
struct linux_dev_v2_funcs {
	int (*v2_inst2pkg)(int d);	/* Convert ihandle to phandle */
	char * (*v2_dumb_mem_alloc)(char *va, unsigned sz);
	void (*v2_dumb_mem_free)(char *va, unsigned sz);

	/* To map devices into virtual I/O space. */
	char * (*v2_dumb_mmap)(char *virta, int which_io, unsigned paddr, unsigned sz);
	void (*v2_dumb_munmap)(char *virta, unsigned size);

	int (*v2_dev_open)(char *devpath);
	void (*v2_dev_close)(int d);
	int (*v2_dev_read)(int d, char *buf, int nbytes);
	int (*v2_dev_write)(int d, char *buf, int nbytes);
	int (*v2_dev_seek)(int d, int hi, int lo);

	/* Never issued (multistage load support) */
	void (*v2_wheee2)(void);
	void (*v2_wheee3)(void);
};

struct linux_mlist_v0 {
	struct linux_mlist_v0 *theres_more;
	char *start_adr;
	unsigned num_bytes;
};

struct linux_mem_v0 {
	struct linux_mlist_v0 **v0_totphys;
	struct linux_mlist_v0 **v0_prommap;
	struct linux_mlist_v0 **v0_available; /* What we can use */
};

/* Arguments sent to the kernel from the boot prompt. */
struct linux_arguments_v0 {
	char *argv[8];
	char args[100];
	char boot_dev[2];
	int boot_dev_ctrl;
	int boot_dev_unit;
	int dev_partition;
	char *kernel_file_name;
	void *aieee1;           /* XXX */
};

/* V2 and up boot things. */
struct linux_bootargs_v2 {
	char **bootpath;
	char **bootargs;
	int *fd_stdin;
	int *fd_stdout;
};

/* The top level PROM vector. */
struct linux_romvec {
	/* Version numbers. */
	unsigned int pv_magic_cookie;
	unsigned int pv_romvers;
	unsigned int pv_plugin_revision;
	unsigned int pv_printrev;

	/* Version 0 memory descriptors. */
	struct linux_mem_v0 pv_v0mem;

	/* Node operations. */
	struct linux_nodeops *pv_nodeops;

	char **pv_bootstr;
	struct linux_dev_v0_funcs pv_v0devops;

	char *pv_stdin;
	char *pv_stdout;
#define	PROMDEV_KBD	0		/* input from keyboard */
#define	PROMDEV_SCREEN	0		/* output to screen */
#define	PROMDEV_TTYA	1		/* in/out to ttya */
#define	PROMDEV_TTYB	2		/* in/out to ttyb */

	/* Blocking getchar/putchar.  NOT REENTRANT! (grr) */
	int (*pv_getchar)(void);
	void (*pv_putchar)(int ch);

	/* Non-blocking variants. */
	int (*pv_nbgetchar)(void);
	int (*pv_nbputchar)(int ch);

	void (*pv_putstr)(char *str, int len);

	/* Miscellany. */
	void (*pv_reboot)(char *bootstr);
	void (*pv_printf)(__const__ char *fmt, ...);
	void (*pv_abort)(void);
	__volatile__ int *pv_ticks;
	void (*pv_halt)(void);
	void (**pv_synchook)(void);

	/* Evaluate a forth string, not different proto for V0 and V2->up. */
	union {
		void (*v0_eval)(int len, char *str);
		void (*v2_eval)(char *str);
	} pv_fortheval;

	struct linux_arguments_v0 **pv_v0bootargs;

	/* Get ether address. */
	unsigned int (*pv_enaddr)(int d, char *enaddr);

	struct linux_bootargs_v2 pv_v2bootargs;
	struct linux_dev_v2_funcs pv_v2devops;

	int filler[15];

	/* This one is sun4c/sun4 only. */
	void (*pv_setctxt)(int ctxt, char *va, int pmeg);

	/* Prom version 3 Multiprocessor routines. This stuff is crazy.
	 * No joke. Calling these when there is only one cpu probably
	 * crashes the machine, have to test this. :-)
	 */

	/* v3_cpustart() will start the cpu 'whichcpu' in mmu-context
	 * 'thiscontext' executing at address 'prog_counter'
	 */
	int (*v3_cpustart)(unsigned int whichcpu, int ctxtbl_ptr,
			   int thiscontext, char *prog_counter);

	/* v3_cpustop() will cause cpu 'whichcpu' to stop executing
	 * until a resume cpu call is made.
	 */
	int (*v3_cpustop)(unsigned int whichcpu);

	/* v3_cpuidle() will idle cpu 'whichcpu' until a stop or
	 * resume cpu call is made.
	 */
	int (*v3_cpuidle)(unsigned int whichcpu);

	/* v3_cpuresume() will resume processor 'whichcpu' executing
	 * starting with whatever 'pc' and 'npc' were left at the
	 * last 'idle' or 'stop' call.
	 */
	int (*v3_cpuresume)(unsigned int whichcpu);
};

extern struct linux_romvec *romvec;

/* Routines for traversing the prom device tree. */
struct linux_nodeops {
	int (*no_nextnode)(int node);
	int (*no_child)(int node);
	int (*no_proplen)(int node, char *name);
	int (*no_getprop)(int node, char *name, char *val);
	int (*no_setprop)(int node, char *name, char *val, int len);
	char * (*no_nextprop)(int node, char *name);
};

/* More fun PROM structures for device probing. */
#define PROMREG_MAX     16
#define PROMVADDR_MAX   16
#define PROMINTR_MAX    15

struct linux_prom_registers {
	unsigned int which_io;         /* is this in OBIO space? */
	unsigned int phys_addr;        /* The physical address of this register */
	unsigned int reg_size;         /* How many bytes does this register take up? */
};

struct linux_prom_irqs {
	int pri;    /* IRQ priority */
	int vector; /* This is foobar, what does it do? */
};

/* Element of the "ranges" vector */
struct linux_prom_ranges {
	unsigned int ot_child_space;
	unsigned int ot_child_base;		/* Bus feels this */
	unsigned int ot_parent_space;
	unsigned int ot_parent_base;		/* CPU looks from here */
	unsigned int or_size;
};

/* Ranges and reg properties are a bit different for PCI. */
struct linux_prom_pci_registers {
	/* 
	 * We don't know what information this field contain.
	 * We guess, PCI device function is in bits 15:8
	 * So, ...
	 */
	unsigned int which_io;  /* Let it be which_io */

	unsigned int phys_hi;
	unsigned int phys_lo;

	unsigned int size_hi;
	unsigned int size_lo;
};

struct linux_prom_pci_ranges {
	unsigned int child_phys_hi;	/* Only certain bits are encoded here. */
	unsigned int child_phys_mid;
	unsigned int child_phys_lo;

	unsigned int parent_phys_hi;
	unsigned int parent_phys_lo;

	unsigned int size_hi;
	unsigned int size_lo;
};

struct linux_prom_pci_assigned_addresses {
	unsigned int which_io;

	unsigned int phys_hi;
	unsigned int phys_lo;

	unsigned int size_hi;
	unsigned int size_lo;
};

struct linux_prom_ebus_ranges {
	unsigned int child_phys_hi;
	unsigned int child_phys_lo;

	unsigned int parent_phys_hi;
	unsigned int parent_phys_mid;
	unsigned int parent_phys_lo;

	unsigned int size;
};

#endif /* !(__ASSEMBLY__) */

#endif /* !(__SPARC_OPENPROM_H) */
