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1#ifndef _POWERPC_RTAS_H
2#define _POWERPC_RTAS_H
3
4#include <linux/spinlock.h>
5#include <asm/page.h>
6
7/*
8 * Definitions for talking to the RTAS on CHRP machines.
9 *
10 * Copyright (C) 2001 Peter Bergner
11 * Copyright (C) 2001 PPC 64 Team, IBM Corp
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 */
18
19#define RTAS_UNKNOWN_SERVICE (-1)
20#define RTAS_INSTANTIATE_MAX (1UL<<30) /* Don't instantiate rtas at/above this value */
21
22/* Buffer size for ppc_rtas system call. */
23#define RTAS_RMOBUF_MAX (64 * 1024)
24
25/* RTAS return status codes */
26#define RTAS_BUSY -2 /* RTAS Busy */
27#define RTAS_EXTENDED_DELAY_MIN 9900
28#define RTAS_EXTENDED_DELAY_MAX 9905
29
30/*
31 * In general to call RTAS use rtas_token("string") to lookup
32 * an RTAS token for the given string (e.g. "event-scan").
33 * To actually perform the call use
34 * ret = rtas_call(token, n_in, n_out, ...)
35 * Where n_in is the number of input parameters and
36 * n_out is the number of output parameters
37 *
38 * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
39 * will be returned as a token. rtas_call() does look for this
40 * token and error out gracefully so rtas_call(rtas_token("str"), ...)
41 * may be safely used for one-shot calls to RTAS.
42 *
43 */
44
45typedef u32 rtas_arg_t;
46
47struct rtas_args {
48 u32 token;
49 u32 nargs;
50 u32 nret;
51 rtas_arg_t args[16];
52 rtas_arg_t *rets; /* Pointer to return values in args[]. */
53};
54
55extern struct rtas_args rtas_stop_self_args;
56
57struct rtas_t {
58 unsigned long entry; /* physical address pointer */
59 unsigned long base; /* physical address pointer */
60 unsigned long size;
61 spinlock_t lock;
62 struct rtas_args args;
63 struct device_node *dev; /* virtual address pointer */
64};
65
66/* RTAS event classes */
67#define RTAS_INTERNAL_ERROR 0x80000000 /* set bit 0 */
68#define RTAS_EPOW_WARNING 0x40000000 /* set bit 1 */
69#define RTAS_POWERMGM_EVENTS 0x20000000 /* set bit 2 */
70#define RTAS_HOTPLUG_EVENTS 0x10000000 /* set bit 3 */
71#define RTAS_EVENT_SCAN_ALL_EVENTS 0xf0000000
72
73/* RTAS event severity */
74#define RTAS_SEVERITY_FATAL 0x5
75#define RTAS_SEVERITY_ERROR 0x4
76#define RTAS_SEVERITY_ERROR_SYNC 0x3
77#define RTAS_SEVERITY_WARNING 0x2
78#define RTAS_SEVERITY_EVENT 0x1
79#define RTAS_SEVERITY_NO_ERROR 0x0
80
81/* RTAS event disposition */
82#define RTAS_DISP_FULLY_RECOVERED 0x0
83#define RTAS_DISP_LIMITED_RECOVERY 0x1
84#define RTAS_DISP_NOT_RECOVERED 0x2
85
86/* RTAS event initiator */
87#define RTAS_INITIATOR_UNKNOWN 0x0
88#define RTAS_INITIATOR_CPU 0x1
89#define RTAS_INITIATOR_PCI 0x2
90#define RTAS_INITIATOR_ISA 0x3
91#define RTAS_INITIATOR_MEMORY 0x4
92#define RTAS_INITIATOR_POWERMGM 0x5
93
94/* RTAS event target */
95#define RTAS_TARGET_UNKNOWN 0x0
96#define RTAS_TARGET_CPU 0x1
97#define RTAS_TARGET_PCI 0x2
98#define RTAS_TARGET_ISA 0x3
99#define RTAS_TARGET_MEMORY 0x4
100#define RTAS_TARGET_POWERMGM 0x5
101
102/* RTAS event type */
103#define RTAS_TYPE_RETRY 0x01
104#define RTAS_TYPE_TCE_ERR 0x02
105#define RTAS_TYPE_INTERN_DEV_FAIL 0x03
106#define RTAS_TYPE_TIMEOUT 0x04
107#define RTAS_TYPE_DATA_PARITY 0x05
108#define RTAS_TYPE_ADDR_PARITY 0x06
109#define RTAS_TYPE_CACHE_PARITY 0x07
110#define RTAS_TYPE_ADDR_INVALID 0x08
111#define RTAS_TYPE_ECC_UNCORR 0x09
112#define RTAS_TYPE_ECC_CORR 0x0a
113#define RTAS_TYPE_EPOW 0x40
114#define RTAS_TYPE_PLATFORM 0xE0
115#define RTAS_TYPE_IO 0xE1
116#define RTAS_TYPE_INFO 0xE2
117#define RTAS_TYPE_DEALLOC 0xE3
118#define RTAS_TYPE_DUMP 0xE4
119/* I don't add PowerMGM events right now, this is a different topic */
120#define RTAS_TYPE_PMGM_POWER_SW_ON 0x60
121#define RTAS_TYPE_PMGM_POWER_SW_OFF 0x61
122#define RTAS_TYPE_PMGM_LID_OPEN 0x62
123#define RTAS_TYPE_PMGM_LID_CLOSE 0x63
124#define RTAS_TYPE_PMGM_SLEEP_BTN 0x64
125#define RTAS_TYPE_PMGM_WAKE_BTN 0x65
126#define RTAS_TYPE_PMGM_BATTERY_WARN 0x66
127#define RTAS_TYPE_PMGM_BATTERY_CRIT 0x67
128#define RTAS_TYPE_PMGM_SWITCH_TO_BAT 0x68
129#define RTAS_TYPE_PMGM_SWITCH_TO_AC 0x69
130#define RTAS_TYPE_PMGM_KBD_OR_MOUSE 0x6a
131#define RTAS_TYPE_PMGM_ENCLOS_OPEN 0x6b
132#define RTAS_TYPE_PMGM_ENCLOS_CLOSED 0x6c
133#define RTAS_TYPE_PMGM_RING_INDICATE 0x6d
134#define RTAS_TYPE_PMGM_LAN_ATTENTION 0x6e
135#define RTAS_TYPE_PMGM_TIME_ALARM 0x6f
136#define RTAS_TYPE_PMGM_CONFIG_CHANGE 0x70
137#define RTAS_TYPE_PMGM_SERVICE_PROC 0x71
138
139struct rtas_error_log {
140 unsigned long version:8; /* Architectural version */
141 unsigned long severity:3; /* Severity level of error */
142 unsigned long disposition:2; /* Degree of recovery */
143 unsigned long extended:1; /* extended log present? */
144 unsigned long /* reserved */ :2; /* Reserved for future use */
145 unsigned long initiator:4; /* Initiator of event */
146 unsigned long target:4; /* Target of failed operation */
147 unsigned long type:8; /* General event or error*/
148 unsigned long extended_log_length:32; /* length in bytes */
149 unsigned char buffer[1];
150};
151
152struct flash_block {
153 char *data;
154 unsigned long length;
155};
156
157/* This struct is very similar but not identical to
158 * that needed by the rtas flash update.
159 * All we need to do for rtas is rewrite num_blocks
160 * into a version/length and translate the pointers
161 * to absolute.
162 */
163#define FLASH_BLOCKS_PER_NODE ((PAGE_SIZE - 16) / sizeof(struct flash_block))
164struct flash_block_list {
165 unsigned long num_blocks;
166 struct flash_block_list *next;
167 struct flash_block blocks[FLASH_BLOCKS_PER_NODE];
168};
169struct flash_block_list_header { /* just the header of flash_block_list */
170 unsigned long num_blocks;
171 struct flash_block_list *next;
172};
173extern struct flash_block_list_header rtas_firmware_flash_list;
174
175extern struct rtas_t rtas;
176
177extern void enter_rtas(unsigned long);
178extern int rtas_token(const char *service);
179extern int rtas_call(int token, int, int, int *, ...);
180extern void call_rtas_display_status(unsigned char);
181extern void rtas_restart(char *cmd);
182extern void rtas_power_off(void);
183extern void rtas_halt(void);
184extern void rtas_os_term(char *str);
185extern int rtas_get_sensor(int sensor, int index, int *state);
186extern int rtas_get_power_level(int powerdomain, int *level);
187extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
188extern int rtas_set_indicator(int indicator, int index, int new_value);
189extern void rtas_progress(char *s, unsigned short hex);
190extern void rtas_initialize(void);
191
192struct rtc_time;
193extern void rtas_get_boot_time(struct rtc_time *rtc_time);
194extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
195extern int rtas_set_rtc_time(struct rtc_time *rtc_time);
196
197/* Given an RTAS status code of 9900..9905 compute the hinted delay */
198unsigned int rtas_extended_busy_delay_time(int status);
199static inline int rtas_is_extended_busy(int status)
200{
201 return status >= 9900 && status <= 9909;
202}
203
204extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
205
206/* Error types logged. */
207#define ERR_FLAG_ALREADY_LOGGED 0x0
208#define ERR_FLAG_BOOT 0x1 /* log was pulled from NVRAM on boot */
209#define ERR_TYPE_RTAS_LOG 0x2 /* from rtas event-scan */
210#define ERR_TYPE_KERNEL_PANIC 0x4 /* from panic() */
211
212/* All the types and not flags */
213#define ERR_TYPE_MASK (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC)
214
215#define RTAS_DEBUG KERN_DEBUG "RTAS: "
216
217#define RTAS_ERROR_LOG_MAX 2048
218
219/*
220 * Return the firmware-specified size of the error log buffer
221 * for all rtas calls that require an error buffer argument.
222 * This includes 'check-exception' and 'rtas-last-error'.
223 */
224extern int rtas_get_error_log_max(void);
225
226/* Event Scan Parameters */
227#define EVENT_SCAN_ALL_EVENTS 0xf0000000
228#define SURVEILLANCE_TOKEN 9000
229#define LOG_NUMBER 64 /* must be a power of two */
230#define LOG_NUMBER_MASK (LOG_NUMBER-1)
231
232/* Some RTAS ops require a data buffer and that buffer must be < 4G.
233 * Rather than having a memory allocator, just use this buffer
234 * (get the lock first), make the RTAS call. Copy the data instead
235 * of holding the buffer for long.
236 */
237
238#define RTAS_DATA_BUF_SIZE 4096
239extern spinlock_t rtas_data_buf_lock;
240extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];
241
242extern void rtas_stop_self(void);
243
244/* RMO buffer reserved for user-space RTAS use */
245extern unsigned long rtas_rmo_buf;
246
247#define GLOBAL_INTERRUPT_QUEUE 9005
248
249#endif /* _POWERPC_RTAS_H */
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