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linux
1#ifndef _POWERPC_RTAS_H
2#define _POWERPC_RTAS_H
3#ifdef __KERNEL__
4
5#include <linux/spinlock.h>
6#include <asm/page.h>
7
8/*
9 * Definitions for talking to the RTAS on CHRP machines.
10 *
11 * Copyright (C) 2001 Peter Bergner
12 * Copyright (C) 2001 PPC 64 Team, IBM Corp
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version
17 * 2 of the License, or (at your option) any later version.
18 */
19
20#define RTAS_UNKNOWN_SERVICE (-1)
21#define RTAS_INSTANTIATE_MAX (1UL<<30) /* Don't instantiate rtas at/above this value */
22
23/* Buffer size for ppc_rtas system call. */
24#define RTAS_RMOBUF_MAX (64 * 1024)
25
26/* RTAS return status codes */
27#define RTAS_NOT_SUSPENDABLE -9004
28#define RTAS_BUSY -2 /* RTAS Busy */
29#define RTAS_EXTENDED_DELAY_MIN 9900
30#define RTAS_EXTENDED_DELAY_MAX 9905
31
32/*
33 * In general to call RTAS use rtas_token("string") to lookup
34 * an RTAS token for the given string (e.g. "event-scan").
35 * To actually perform the call use
36 * ret = rtas_call(token, n_in, n_out, ...)
37 * Where n_in is the number of input parameters and
38 * n_out is the number of output parameters
39 *
40 * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
41 * will be returned as a token. rtas_call() does look for this
42 * token and error out gracefully so rtas_call(rtas_token("str"), ...)
43 * may be safely used for one-shot calls to RTAS.
44 *
45 */
46
47typedef u32 rtas_arg_t;
48
49struct rtas_args {
50 u32 token;
51 u32 nargs;
52 u32 nret;
53 rtas_arg_t args[16];
54 rtas_arg_t *rets; /* Pointer to return values in args[]. */
55};
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
152/*
153 * This can be set by the rtas_flash module so that it can get called
154 * as the absolutely last thing before the kernel terminates.
155 */
156extern void (*rtas_flash_term_hook)(int);
157
158extern struct rtas_t rtas;
159
160extern void enter_rtas(unsigned long);
161extern int rtas_token(const char *service);
162extern int rtas_service_present(const char *service);
163extern int rtas_call(int token, int, int, int *, ...);
164extern void rtas_restart(char *cmd);
165extern void rtas_power_off(void);
166extern void rtas_halt(void);
167extern void rtas_os_term(char *str);
168extern int rtas_get_sensor(int sensor, int index, int *state);
169extern int rtas_get_power_level(int powerdomain, int *level);
170extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
171extern int rtas_set_indicator(int indicator, int index, int new_value);
172extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
173extern void rtas_progress(char *s, unsigned short hex);
174extern void rtas_initialize(void);
175
176struct rtc_time;
177extern unsigned long rtas_get_boot_time(void);
178extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
179extern int rtas_set_rtc_time(struct rtc_time *rtc_time);
180
181extern unsigned int rtas_busy_delay_time(int status);
182extern unsigned int rtas_busy_delay(int status);
183
184extern int early_init_dt_scan_rtas(unsigned long node,
185 const char *uname, int depth, void *data);
186
187extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
188
189/* Error types logged. */
190#define ERR_FLAG_ALREADY_LOGGED 0x0
191#define ERR_FLAG_BOOT 0x1 /* log was pulled from NVRAM on boot */
192#define ERR_TYPE_RTAS_LOG 0x2 /* from rtas event-scan */
193#define ERR_TYPE_KERNEL_PANIC 0x4 /* from panic() */
194
195/* All the types and not flags */
196#define ERR_TYPE_MASK (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC)
197
198#define RTAS_DEBUG KERN_DEBUG "RTAS: "
199
200#define RTAS_ERROR_LOG_MAX 2048
201
202/*
203 * Return the firmware-specified size of the error log buffer
204 * for all rtas calls that require an error buffer argument.
205 * This includes 'check-exception' and 'rtas-last-error'.
206 */
207extern int rtas_get_error_log_max(void);
208
209/* Event Scan Parameters */
210#define EVENT_SCAN_ALL_EVENTS 0xf0000000
211#define SURVEILLANCE_TOKEN 9000
212#define LOG_NUMBER 64 /* must be a power of two */
213#define LOG_NUMBER_MASK (LOG_NUMBER-1)
214
215/* Some RTAS ops require a data buffer and that buffer must be < 4G.
216 * Rather than having a memory allocator, just use this buffer
217 * (get the lock first), make the RTAS call. Copy the data instead
218 * of holding the buffer for long.
219 */
220
221#define RTAS_DATA_BUF_SIZE 4096
222extern spinlock_t rtas_data_buf_lock;
223extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];
224
225/* RMO buffer reserved for user-space RTAS use */
226extern unsigned long rtas_rmo_buf;
227
228#define GLOBAL_INTERRUPT_QUEUE 9005
229
230/**
231 * rtas_config_addr - Format a busno, devfn and reg for RTAS.
232 * @busno: The bus number.
233 * @devfn: The device and function number as encoded by PCI_DEVFN().
234 * @reg: The register number.
235 *
236 * This function encodes the given busno, devfn and register number as
237 * required for RTAS calls that take a "config_addr" parameter.
238 * See PAPR requirement 7.3.4-1 for more info.
239 */
240static inline u32 rtas_config_addr(int busno, int devfn, int reg)
241{
242 return ((reg & 0xf00) << 20) | ((busno & 0xff) << 16) |
243 (devfn << 8) | (reg & 0xff);
244}
245
246#endif /* __KERNEL__ */
247#endif /* _POWERPC_RTAS_H */