arch/powerpc/include/asm/rtas.h

   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 (1ULL<<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
  47 typedef u32 rtas_arg_t;
  48
  49 struct 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
  57 struct 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_IO_EVENTS                  0x08000000 /* set bit 4 */
  72 #define RTAS_EVENT_SCAN_ALL_EVENTS      0xffffffff
  73
  74 /* RTAS event severity */
  75 #define RTAS_SEVERITY_FATAL             0x5
  76 #define RTAS_SEVERITY_ERROR             0x4
  77 #define RTAS_SEVERITY_ERROR_SYNC        0x3
  78 #define RTAS_SEVERITY_WARNING           0x2
  79 #define RTAS_SEVERITY_EVENT             0x1
  80 #define RTAS_SEVERITY_NO_ERROR          0x0
  81
  82 /* RTAS event disposition */
  83 #define RTAS_DISP_FULLY_RECOVERED       0x0
  84 #define RTAS_DISP_LIMITED_RECOVERY      0x1
  85 #define RTAS_DISP_NOT_RECOVERED         0x2
  86
  87 /* RTAS event initiator */
  88 #define RTAS_INITIATOR_UNKNOWN          0x0
  89 #define RTAS_INITIATOR_CPU              0x1
  90 #define RTAS_INITIATOR_PCI              0x2
  91 #define RTAS_INITIATOR_ISA              0x3
  92 #define RTAS_INITIATOR_MEMORY           0x4
  93 #define RTAS_INITIATOR_POWERMGM         0x5
  94
  95 /* RTAS event target */
  96 #define RTAS_TARGET_UNKNOWN             0x0
  97 #define RTAS_TARGET_CPU                 0x1
  98 #define RTAS_TARGET_PCI                 0x2
  99 #define RTAS_TARGET_ISA                 0x3
 100 #define RTAS_TARGET_MEMORY              0x4
 101 #define RTAS_TARGET_POWERMGM            0x5
 102
 103 /* RTAS event type */
 104 #define RTAS_TYPE_RETRY                 0x01
 105 #define RTAS_TYPE_TCE_ERR               0x02
 106 #define RTAS_TYPE_INTERN_DEV_FAIL       0x03
 107 #define RTAS_TYPE_TIMEOUT               0x04
 108 #define RTAS_TYPE_DATA_PARITY           0x05
 109 #define RTAS_TYPE_ADDR_PARITY           0x06
 110 #define RTAS_TYPE_CACHE_PARITY          0x07
 111 #define RTAS_TYPE_ADDR_INVALID          0x08
 112 #define RTAS_TYPE_ECC_UNCORR            0x09
 113 #define RTAS_TYPE_ECC_CORR              0x0a
 114 #define RTAS_TYPE_EPOW                  0x40
 115 #define RTAS_TYPE_PLATFORM              0xE0
 116 #define RTAS_TYPE_IO                    0xE1
 117 #define RTAS_TYPE_INFO                  0xE2
 118 #define RTAS_TYPE_DEALLOC               0xE3
 119 #define RTAS_TYPE_DUMP                  0xE4
 120 /* I don't add PowerMGM events right now, this is a different topic */
 121 #define RTAS_TYPE_PMGM_POWER_SW_ON      0x60
 122 #define RTAS_TYPE_PMGM_POWER_SW_OFF     0x61
 123 #define RTAS_TYPE_PMGM_LID_OPEN         0x62
 124 #define RTAS_TYPE_PMGM_LID_CLOSE        0x63
 125 #define RTAS_TYPE_PMGM_SLEEP_BTN        0x64
 126 #define RTAS_TYPE_PMGM_WAKE_BTN         0x65
 127 #define RTAS_TYPE_PMGM_BATTERY_WARN     0x66
 128 #define RTAS_TYPE_PMGM_BATTERY_CRIT     0x67
 129 #define RTAS_TYPE_PMGM_SWITCH_TO_BAT    0x68
 130 #define RTAS_TYPE_PMGM_SWITCH_TO_AC     0x69
 131 #define RTAS_TYPE_PMGM_KBD_OR_MOUSE     0x6a
 132 #define RTAS_TYPE_PMGM_ENCLOS_OPEN      0x6b
 133 #define RTAS_TYPE_PMGM_ENCLOS_CLOSED    0x6c
 134 #define RTAS_TYPE_PMGM_RING_INDICATE    0x6d
 135 #define RTAS_TYPE_PMGM_LAN_ATTENTION    0x6e
 136 #define RTAS_TYPE_PMGM_TIME_ALARM       0x6f
 137 #define RTAS_TYPE_PMGM_CONFIG_CHANGE    0x70
 138 #define RTAS_TYPE_PMGM_SERVICE_PROC     0x71
 139
 140 struct rtas_error_log {
 141         unsigned long version:8;                /* Architectural version */
 142         unsigned long severity:3;               /* Severity level of error */
 143         unsigned long disposition:2;            /* Degree of recovery */
 144         unsigned long extended:1;               /* extended log present? */
 145         unsigned long /* reserved */ :2;        /* Reserved for future use */
 146         unsigned long initiator:4;              /* Initiator of event */
 147         unsigned long target:4;                 /* Target of failed operation */
 148         unsigned long type:8;                   /* General event or error*/
 149         unsigned long extended_log_length:32;   /* length in bytes */
 150         unsigned char buffer[1];
 151 };
 152
 153 /*
 154  * This can be set by the rtas_flash module so that it can get called
 155  * as the absolutely last thing before the kernel terminates.
 156  */
 157 extern void (*rtas_flash_term_hook)(int);
 158
 159 extern struct rtas_t rtas;
 160
 161 extern void enter_rtas(unsigned long);
 162 extern int rtas_token(const char *service);
 163 extern int rtas_service_present(const char *service);
 164 extern int rtas_call(int token, int, int, int *, ...);
 165 extern void rtas_restart(char *cmd);
 166 extern void rtas_power_off(void);
 167 extern void rtas_halt(void);
 168 extern void rtas_os_term(char *str);
 169 extern int rtas_get_sensor(int sensor, int index, int *state);
 170 extern int rtas_get_power_level(int powerdomain, int *level);
 171 extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
 172 extern bool rtas_indicator_present(int token, int *maxindex);
 173 extern int rtas_set_indicator(int indicator, int index, int new_value);
 174 extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
 175 extern void rtas_progress(char *s, unsigned short hex);
 176 extern void rtas_initialize(void);
 177
 178 struct rtc_time;
 179 extern unsigned long rtas_get_boot_time(void);
 180 extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
 181 extern int rtas_set_rtc_time(struct rtc_time *rtc_time);
 182
 183 extern unsigned int rtas_busy_delay_time(int status);
 184 extern unsigned int rtas_busy_delay(int status);
 185
 186 extern int early_init_dt_scan_rtas(unsigned long node,
 187                 const char *uname, int depth, void *data);
 188
 189 extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
 190
 191 /* Error types logged.  */
 192 #define ERR_FLAG_ALREADY_LOGGED 0x0
 193 #define ERR_FLAG_BOOT           0x1     /* log was pulled from NVRAM on boot */
 194 #define ERR_TYPE_RTAS_LOG       0x2     /* from rtas event-scan */
 195 #define ERR_TYPE_KERNEL_PANIC   0x4     /* from panic() */
 196
 197 /* All the types and not flags */
 198 #define ERR_TYPE_MASK   (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC)
 199
 200 #define RTAS_DEBUG KERN_DEBUG "RTAS: "
 201
 202 #define RTAS_ERROR_LOG_MAX 2048
 203
 204 /*
 205  * Return the firmware-specified size of the error log buffer
 206  *  for all rtas calls that require an error buffer argument.
 207  *  This includes 'check-exception' and 'rtas-last-error'.
 208  */
 209 extern int rtas_get_error_log_max(void);
 210
 211 /* Event Scan Parameters */
 212 #define EVENT_SCAN_ALL_EVENTS   0xf0000000
 213 #define SURVEILLANCE_TOKEN      9000
 214 #define LOG_NUMBER              64              /* must be a power of two */
 215 #define LOG_NUMBER_MASK         (LOG_NUMBER-1)
 216
 217 /* Some RTAS ops require a data buffer and that buffer must be < 4G.
 218  * Rather than having a memory allocator, just use this buffer
 219  * (get the lock first), make the RTAS call.  Copy the data instead
 220  * of holding the buffer for long.
 221  */
 222
 223 #define RTAS_DATA_BUF_SIZE 4096
 224 extern spinlock_t rtas_data_buf_lock;
 225 extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];
 226
 227 /* RMO buffer reserved for user-space RTAS use */
 228 extern unsigned long rtas_rmo_buf;
 229
 230 #define GLOBAL_INTERRUPT_QUEUE 9005
 231
 232 /**
 233  * rtas_config_addr - Format a busno, devfn and reg for RTAS.
 234  * @busno: The bus number.
 235  * @devfn: The device and function number as encoded by PCI_DEVFN().
 236  * @reg: The register number.
 237  *
 238  * This function encodes the given busno, devfn and register number as
 239  * required for RTAS calls that take a "config_addr" parameter.
 240  * See PAPR requirement 7.3.4-1 for more info.
 241  */
 242 static inline u32 rtas_config_addr(int busno, int devfn, int reg)
 243 {
 244         return ((reg & 0xf00) << 20) | ((busno & 0xff) << 16) |
 245                         (devfn << 8) | (reg & 0xff);
 246 }
 247
 248 #endif /* __KERNEL__ */
 249 #endif /* _POWERPC_RTAS_H */