1/* $Id: openprom.h,v 1.1.1.1 2008/10/15 03:29:17 james26_jang Exp $ */
2#ifndef __SPARC_OPENPROM_H
3#define __SPARC_OPENPROM_H
4
5/* openprom.h:  Prom structures and defines for access to the OPENBOOT
6 *              prom routines and data areas.
7 *
8 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
9 */
10
11#include <asm/vaddrs.h>
12
13/* Empirical constants... */
14#define	LINUX_OPPROM_MAGIC      0x10010407
15
16#ifndef __ASSEMBLY__
17/* V0 prom device operations. */
18struct linux_dev_v0_funcs {
19	int (*v0_devopen)(char *device_str);
20	int (*v0_devclose)(int dev_desc);
21	int (*v0_rdblkdev)(int dev_desc, int num_blks, int blk_st, char *buf);
22	int (*v0_wrblkdev)(int dev_desc, int num_blks, int blk_st, char *buf);
23	int (*v0_wrnetdev)(int dev_desc, int num_bytes, char *buf);
24	int (*v0_rdnetdev)(int dev_desc, int num_bytes, char *buf);
25	int (*v0_rdchardev)(int dev_desc, int num_bytes, int dummy, char *buf);
26	int (*v0_wrchardev)(int dev_desc, int num_bytes, int dummy, char *buf);
27	int (*v0_seekdev)(int dev_desc, long logical_offst, int from);
28};
29
30/* V2 and later prom device operations. */
31struct linux_dev_v2_funcs {
32	int (*v2_inst2pkg)(int d);	/* Convert ihandle to phandle */
33	char * (*v2_dumb_mem_alloc)(char *va, unsigned sz);
34	void (*v2_dumb_mem_free)(char *va, unsigned sz);
35
36	/* To map devices into virtual I/O space. */
37	char * (*v2_dumb_mmap)(char *virta, int which_io, unsigned paddr, unsigned sz);
38	void (*v2_dumb_munmap)(char *virta, unsigned size);
39
40	int (*v2_dev_open)(char *devpath);
41	void (*v2_dev_close)(int d);
42	int (*v2_dev_read)(int d, char *buf, int nbytes);
43	int (*v2_dev_write)(int d, char *buf, int nbytes);
44	int (*v2_dev_seek)(int d, int hi, int lo);
45
46	/* Never issued (multistage load support) */
47	void (*v2_wheee2)(void);
48	void (*v2_wheee3)(void);
49};
50
51struct linux_mlist_v0 {
52	struct linux_mlist_v0 *theres_more;
53	char *start_adr;
54	unsigned num_bytes;
55};
56
57struct linux_mem_v0 {
58	struct linux_mlist_v0 **v0_totphys;
59	struct linux_mlist_v0 **v0_prommap;
60	struct linux_mlist_v0 **v0_available; /* What we can use */
61};
62
63/* Arguments sent to the kernel from the boot prompt. */
64struct linux_arguments_v0 {
65	char *argv[8];
66	char args[100];
67	char boot_dev[2];
68	int boot_dev_ctrl;
69	int boot_dev_unit;
70	int dev_partition;
71	char *kernel_file_name;
72	void *aieee1;
73};
74
75/* V2 and up boot things. */
76struct linux_bootargs_v2 {
77	char **bootpath;
78	char **bootargs;
79	int *fd_stdin;
80	int *fd_stdout;
81};
82
83/* The top level PROM vector. */
84struct linux_romvec {
85	/* Version numbers. */
86	unsigned int pv_magic_cookie;
87	unsigned int pv_romvers;
88	unsigned int pv_plugin_revision;
89	unsigned int pv_printrev;
90
91	/* Version 0 memory descriptors. */
92	struct linux_mem_v0 pv_v0mem;
93
94	/* Node operations. */
95	struct linux_nodeops *pv_nodeops;
96
97	char **pv_bootstr;
98	struct linux_dev_v0_funcs pv_v0devops;
99
100	char *pv_stdin;
101	char *pv_stdout;
102#define	PROMDEV_KBD	0		/* input from keyboard */
103#define	PROMDEV_SCREEN	0		/* output to screen */
104#define	PROMDEV_TTYA	1		/* in/out to ttya */
105#define	PROMDEV_TTYB	2		/* in/out to ttyb */
106
107	/* Blocking getchar/putchar.  NOT REENTRANT! (grr) */
108	int (*pv_getchar)(void);
109	void (*pv_putchar)(int ch);
110
111	/* Non-blocking variants. */
112	int (*pv_nbgetchar)(void);
113	int (*pv_nbputchar)(int ch);
114
115	void (*pv_putstr)(char *str, int len);
116
117	/* Miscellany. */
118	void (*pv_reboot)(char *bootstr);
119	void (*pv_printf)(__const__ char *fmt, ...);
120	void (*pv_abort)(void);
121	__volatile__ int *pv_ticks;
122	void (*pv_halt)(void);
123	void (**pv_synchook)(void);
124
125	/* Evaluate a forth string, not different proto for V0 and V2->up. */
126	union {
127		void (*v0_eval)(int len, char *str);
128		void (*v2_eval)(char *str);
129	} pv_fortheval;
130
131	struct linux_arguments_v0 **pv_v0bootargs;
132
133	/* Get ether address. */
134	unsigned int (*pv_enaddr)(int d, char *enaddr);
135
136	struct linux_bootargs_v2 pv_v2bootargs;
137	struct linux_dev_v2_funcs pv_v2devops;
138
139	int filler[15];
140
141	/* This one is sun4c/sun4 only. */
142	void (*pv_setctxt)(int ctxt, char *va, int pmeg);
143
144	/* Prom version 3 Multiprocessor routines. This stuff is crazy.
145	 * No joke. Calling these when there is only one cpu probably
146	 * crashes the machine, have to test this. :-)
147	 */
148
149	/* v3_cpustart() will start the cpu 'whichcpu' in mmu-context
150	 * 'thiscontext' executing at address 'prog_counter'
151	 */
152	int (*v3_cpustart)(unsigned int whichcpu, int ctxtbl_ptr,
153			   int thiscontext, char *prog_counter);
154
155	/* v3_cpustop() will cause cpu 'whichcpu' to stop executing
156	 * until a resume cpu call is made.
157	 */
158	int (*v3_cpustop)(unsigned int whichcpu);
159
160	/* v3_cpuidle() will idle cpu 'whichcpu' until a stop or
161	 * resume cpu call is made.
162	 */
163	int (*v3_cpuidle)(unsigned int whichcpu);
164
165	/* v3_cpuresume() will resume processor 'whichcpu' executing
166	 * starting with whatever 'pc' and 'npc' were left at the
167	 * last 'idle' or 'stop' call.
168	 */
169	int (*v3_cpuresume)(unsigned int whichcpu);
170};
171
172/* Routines for traversing the prom device tree. */
173struct linux_nodeops {
174	int (*no_nextnode)(int node);
175	int (*no_child)(int node);
176	int (*no_proplen)(int node, char *name);
177	int (*no_getprop)(int node, char *name, char *val);
178	int (*no_setprop)(int node, char *name, char *val, int len);
179	char * (*no_nextprop)(int node, char *name);
180};
181
182/* More fun PROM structures for device probing. */
183#define PROMREG_MAX     16
184#define PROMVADDR_MAX   16
185#define PROMINTR_MAX    15
186
187struct linux_prom_registers {
188	unsigned int which_io;         /* is this in OBIO space? */
189	unsigned int phys_addr;        /* The physical address of this register */
190	unsigned int reg_size;         /* How many bytes does this register take up? */
191};
192
193struct linux_prom_irqs {
194	int pri;    /* IRQ priority */
195	int vector; /* This is foobar, what does it do? */
196};
197
198/* Element of the "ranges" vector */
199struct linux_prom_ranges {
200	unsigned int ot_child_space;
201	unsigned int ot_child_base;		/* Bus feels this */
202	unsigned int ot_parent_space;
203	unsigned int ot_parent_base;		/* CPU looks from here */
204	unsigned int or_size;
205};
206
207/* Ranges and reg properties are a bit different for PCI. */
208struct linux_prom_pci_registers {
209	/*
210	 * We don't know what information this field contain.
211	 * We guess, PCI device function is in bits 15:8
212	 * So, ...
213	 */
214	unsigned int which_io;  /* Let it be which_io */
215
216	unsigned int phys_hi;
217	unsigned int phys_lo;
218
219	unsigned int size_hi;
220	unsigned int size_lo;
221};
222
223struct linux_prom_pci_ranges {
224	unsigned int child_phys_hi;	/* Only certain bits are encoded here. */
225	unsigned int child_phys_mid;
226	unsigned int child_phys_lo;
227
228	unsigned int parent_phys_hi;
229	unsigned int parent_phys_lo;
230
231	unsigned int size_hi;
232	unsigned int size_lo;
233};
234
235struct linux_prom_pci_assigned_addresses {
236	unsigned int which_io;
237
238	unsigned int phys_hi;
239	unsigned int phys_lo;
240
241	unsigned int size_hi;
242	unsigned int size_lo;
243};
244
245struct linux_prom_ebus_ranges {
246	unsigned int child_phys_hi;
247	unsigned int child_phys_lo;
248
249	unsigned int parent_phys_hi;
250	unsigned int parent_phys_mid;
251	unsigned int parent_phys_lo;
252
253	unsigned int size;
254};
255
256#endif /* !(__ASSEMBLY__) */
257
258#endif /* !(__SPARC_OPENPROM_H) */
259