1b8b572e1SStephen Rothwell #ifndef _POWERPC_RTAS_H 2b8b572e1SStephen Rothwell #define _POWERPC_RTAS_H 3b8b572e1SStephen Rothwell #ifdef __KERNEL__ 4b8b572e1SStephen Rothwell 5b8b572e1SStephen Rothwell #include <linux/spinlock.h> 6b8b572e1SStephen Rothwell #include <asm/page.h> 7b8b572e1SStephen Rothwell 8b8b572e1SStephen Rothwell /* 9b8b572e1SStephen Rothwell * Definitions for talking to the RTAS on CHRP machines. 10b8b572e1SStephen Rothwell * 11b8b572e1SStephen Rothwell * Copyright (C) 2001 Peter Bergner 12b8b572e1SStephen Rothwell * Copyright (C) 2001 PPC 64 Team, IBM Corp 13b8b572e1SStephen Rothwell * 14b8b572e1SStephen Rothwell * This program is free software; you can redistribute it and/or 15b8b572e1SStephen Rothwell * modify it under the terms of the GNU General Public License 16b8b572e1SStephen Rothwell * as published by the Free Software Foundation; either version 17b8b572e1SStephen Rothwell * 2 of the License, or (at your option) any later version. 18b8b572e1SStephen Rothwell */ 19b8b572e1SStephen Rothwell 20b8b572e1SStephen Rothwell #define RTAS_UNKNOWN_SERVICE (-1) 21fe333321SIngo Molnar #define RTAS_INSTANTIATE_MAX (1ULL<<30) /* Don't instantiate rtas at/above this value */ 22b8b572e1SStephen Rothwell 23b8b572e1SStephen Rothwell /* Buffer size for ppc_rtas system call. */ 24b8b572e1SStephen Rothwell #define RTAS_RMOBUF_MAX (64 * 1024) 25b8b572e1SStephen Rothwell 26b8b572e1SStephen Rothwell /* RTAS return status codes */ 27b8b572e1SStephen Rothwell #define RTAS_NOT_SUSPENDABLE -9004 28b8b572e1SStephen Rothwell #define RTAS_BUSY -2 /* RTAS Busy */ 29b8b572e1SStephen Rothwell #define RTAS_EXTENDED_DELAY_MIN 9900 30b8b572e1SStephen Rothwell #define RTAS_EXTENDED_DELAY_MAX 9905 31b8b572e1SStephen Rothwell 32b8b572e1SStephen Rothwell /* 33b8b572e1SStephen Rothwell * In general to call RTAS use rtas_token("string") to lookup 34b8b572e1SStephen Rothwell * an RTAS token for the given string (e.g. "event-scan"). 35b8b572e1SStephen Rothwell * To actually perform the call use 36b8b572e1SStephen Rothwell * ret = rtas_call(token, n_in, n_out, ...) 37b8b572e1SStephen Rothwell * Where n_in is the number of input parameters and 38b8b572e1SStephen Rothwell * n_out is the number of output parameters 39b8b572e1SStephen Rothwell * 40b8b572e1SStephen Rothwell * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE 41b8b572e1SStephen Rothwell * will be returned as a token. rtas_call() does look for this 42b8b572e1SStephen Rothwell * token and error out gracefully so rtas_call(rtas_token("str"), ...) 43b8b572e1SStephen Rothwell * may be safely used for one-shot calls to RTAS. 44b8b572e1SStephen Rothwell * 45b8b572e1SStephen Rothwell */ 46b8b572e1SStephen Rothwell 47b8b572e1SStephen Rothwell typedef u32 rtas_arg_t; 48b8b572e1SStephen Rothwell 49b8b572e1SStephen Rothwell struct rtas_args { 50b8b572e1SStephen Rothwell u32 token; 51b8b572e1SStephen Rothwell u32 nargs; 52b8b572e1SStephen Rothwell u32 nret; 53b8b572e1SStephen Rothwell rtas_arg_t args[16]; 54b8b572e1SStephen Rothwell rtas_arg_t *rets; /* Pointer to return values in args[]. */ 55b8b572e1SStephen Rothwell }; 56b8b572e1SStephen Rothwell 57b8b572e1SStephen Rothwell struct rtas_t { 58b8b572e1SStephen Rothwell unsigned long entry; /* physical address pointer */ 59b8b572e1SStephen Rothwell unsigned long base; /* physical address pointer */ 60b8b572e1SStephen Rothwell unsigned long size; 61445c8951SThomas Gleixner arch_spinlock_t lock; 62b8b572e1SStephen Rothwell struct rtas_args args; 63b8b572e1SStephen Rothwell struct device_node *dev; /* virtual address pointer */ 64b8b572e1SStephen Rothwell }; 65b8b572e1SStephen Rothwell 668fe93f8dSBrian King struct rtas_suspend_me_data { 678fe93f8dSBrian King atomic_t working; /* number of cpus accessing this struct */ 688fe93f8dSBrian King atomic_t done; 698fe93f8dSBrian King int token; /* ibm,suspend-me */ 708fe93f8dSBrian King atomic_t error; 718fe93f8dSBrian King struct completion *complete; /* wait on this until working == 0 */ 728fe93f8dSBrian King }; 738fe93f8dSBrian King 74b8b572e1SStephen Rothwell /* RTAS event classes */ 75b8b572e1SStephen Rothwell #define RTAS_INTERNAL_ERROR 0x80000000 /* set bit 0 */ 76b8b572e1SStephen Rothwell #define RTAS_EPOW_WARNING 0x40000000 /* set bit 1 */ 77b8b572e1SStephen Rothwell #define RTAS_POWERMGM_EVENTS 0x20000000 /* set bit 2 */ 78b8b572e1SStephen Rothwell #define RTAS_HOTPLUG_EVENTS 0x10000000 /* set bit 3 */ 794a9f9506SAnton Blanchard #define RTAS_IO_EVENTS 0x08000000 /* set bit 4 */ 804a9f9506SAnton Blanchard #define RTAS_EVENT_SCAN_ALL_EVENTS 0xffffffff 81b8b572e1SStephen Rothwell 82b8b572e1SStephen Rothwell /* RTAS event severity */ 83b8b572e1SStephen Rothwell #define RTAS_SEVERITY_FATAL 0x5 84b8b572e1SStephen Rothwell #define RTAS_SEVERITY_ERROR 0x4 85b8b572e1SStephen Rothwell #define RTAS_SEVERITY_ERROR_SYNC 0x3 86b8b572e1SStephen Rothwell #define RTAS_SEVERITY_WARNING 0x2 87b8b572e1SStephen Rothwell #define RTAS_SEVERITY_EVENT 0x1 88b8b572e1SStephen Rothwell #define RTAS_SEVERITY_NO_ERROR 0x0 89b8b572e1SStephen Rothwell 90b8b572e1SStephen Rothwell /* RTAS event disposition */ 91b8b572e1SStephen Rothwell #define RTAS_DISP_FULLY_RECOVERED 0x0 92b8b572e1SStephen Rothwell #define RTAS_DISP_LIMITED_RECOVERY 0x1 93b8b572e1SStephen Rothwell #define RTAS_DISP_NOT_RECOVERED 0x2 94b8b572e1SStephen Rothwell 95b8b572e1SStephen Rothwell /* RTAS event initiator */ 96b8b572e1SStephen Rothwell #define RTAS_INITIATOR_UNKNOWN 0x0 97b8b572e1SStephen Rothwell #define RTAS_INITIATOR_CPU 0x1 98b8b572e1SStephen Rothwell #define RTAS_INITIATOR_PCI 0x2 99b8b572e1SStephen Rothwell #define RTAS_INITIATOR_ISA 0x3 100b8b572e1SStephen Rothwell #define RTAS_INITIATOR_MEMORY 0x4 101b8b572e1SStephen Rothwell #define RTAS_INITIATOR_POWERMGM 0x5 102b8b572e1SStephen Rothwell 103b8b572e1SStephen Rothwell /* RTAS event target */ 104b8b572e1SStephen Rothwell #define RTAS_TARGET_UNKNOWN 0x0 105b8b572e1SStephen Rothwell #define RTAS_TARGET_CPU 0x1 106b8b572e1SStephen Rothwell #define RTAS_TARGET_PCI 0x2 107b8b572e1SStephen Rothwell #define RTAS_TARGET_ISA 0x3 108b8b572e1SStephen Rothwell #define RTAS_TARGET_MEMORY 0x4 109b8b572e1SStephen Rothwell #define RTAS_TARGET_POWERMGM 0x5 110b8b572e1SStephen Rothwell 111b8b572e1SStephen Rothwell /* RTAS event type */ 112b8b572e1SStephen Rothwell #define RTAS_TYPE_RETRY 0x01 113b8b572e1SStephen Rothwell #define RTAS_TYPE_TCE_ERR 0x02 114b8b572e1SStephen Rothwell #define RTAS_TYPE_INTERN_DEV_FAIL 0x03 115b8b572e1SStephen Rothwell #define RTAS_TYPE_TIMEOUT 0x04 116b8b572e1SStephen Rothwell #define RTAS_TYPE_DATA_PARITY 0x05 117b8b572e1SStephen Rothwell #define RTAS_TYPE_ADDR_PARITY 0x06 118b8b572e1SStephen Rothwell #define RTAS_TYPE_CACHE_PARITY 0x07 119b8b572e1SStephen Rothwell #define RTAS_TYPE_ADDR_INVALID 0x08 120b8b572e1SStephen Rothwell #define RTAS_TYPE_ECC_UNCORR 0x09 121b8b572e1SStephen Rothwell #define RTAS_TYPE_ECC_CORR 0x0a 122b8b572e1SStephen Rothwell #define RTAS_TYPE_EPOW 0x40 123b8b572e1SStephen Rothwell #define RTAS_TYPE_PLATFORM 0xE0 124b8b572e1SStephen Rothwell #define RTAS_TYPE_IO 0xE1 125b8b572e1SStephen Rothwell #define RTAS_TYPE_INFO 0xE2 126b8b572e1SStephen Rothwell #define RTAS_TYPE_DEALLOC 0xE3 127b8b572e1SStephen Rothwell #define RTAS_TYPE_DUMP 0xE4 128b8b572e1SStephen Rothwell /* I don't add PowerMGM events right now, this is a different topic */ 129b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_POWER_SW_ON 0x60 130b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_POWER_SW_OFF 0x61 131b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_LID_OPEN 0x62 132b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_LID_CLOSE 0x63 133b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_SLEEP_BTN 0x64 134b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_WAKE_BTN 0x65 135b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_BATTERY_WARN 0x66 136b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_BATTERY_CRIT 0x67 137b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_SWITCH_TO_BAT 0x68 138b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_SWITCH_TO_AC 0x69 139b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_KBD_OR_MOUSE 0x6a 140b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_ENCLOS_OPEN 0x6b 141b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_ENCLOS_CLOSED 0x6c 142b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_RING_INDICATE 0x6d 143b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_LAN_ATTENTION 0x6e 144b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_TIME_ALARM 0x6f 145b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_CONFIG_CHANGE 0x70 146b8b572e1SStephen Rothwell #define RTAS_TYPE_PMGM_SERVICE_PROC 0x71 147b8b572e1SStephen Rothwell 148b08e281bSMark Nelson /* RTAS check-exception vector offset */ 149b08e281bSMark Nelson #define RTAS_VECTOR_EXTERNAL_INTERRUPT 0x500 150b08e281bSMark Nelson 151b8b572e1SStephen Rothwell struct rtas_error_log { 152b8b572e1SStephen Rothwell unsigned long version:8; /* Architectural version */ 153b8b572e1SStephen Rothwell unsigned long severity:3; /* Severity level of error */ 154b8b572e1SStephen Rothwell unsigned long disposition:2; /* Degree of recovery */ 155b8b572e1SStephen Rothwell unsigned long extended:1; /* extended log present? */ 156b8b572e1SStephen Rothwell unsigned long /* reserved */ :2; /* Reserved for future use */ 157b8b572e1SStephen Rothwell unsigned long initiator:4; /* Initiator of event */ 158b8b572e1SStephen Rothwell unsigned long target:4; /* Target of failed operation */ 159b8b572e1SStephen Rothwell unsigned long type:8; /* General event or error*/ 160b8b572e1SStephen Rothwell unsigned long extended_log_length:32; /* length in bytes */ 1614cb46380STseng-Hui (Frank) Lin unsigned char buffer[1]; /* Start of extended log */ 1624cb46380STseng-Hui (Frank) Lin /* Variable length. */ 1634cb46380STseng-Hui (Frank) Lin }; 1644cb46380STseng-Hui (Frank) Lin 1654cb46380STseng-Hui (Frank) Lin #define RTAS_V6EXT_LOG_FORMAT_EVENT_LOG 14 1664cb46380STseng-Hui (Frank) Lin 1674cb46380STseng-Hui (Frank) Lin #define RTAS_V6EXT_COMPANY_ID_IBM (('I' << 24) | ('B' << 16) | ('M' << 8)) 1684cb46380STseng-Hui (Frank) Lin 1694cb46380STseng-Hui (Frank) Lin /* RTAS general extended event log, Version 6. The extended log starts 1704cb46380STseng-Hui (Frank) Lin * from "buffer" field of struct rtas_error_log defined above. 1714cb46380STseng-Hui (Frank) Lin */ 1724cb46380STseng-Hui (Frank) Lin struct rtas_ext_event_log_v6 { 1734cb46380STseng-Hui (Frank) Lin /* Byte 0 */ 1744cb46380STseng-Hui (Frank) Lin uint32_t log_valid:1; /* 1:Log valid */ 1754cb46380STseng-Hui (Frank) Lin uint32_t unrecoverable_error:1; /* 1:Unrecoverable error */ 1764cb46380STseng-Hui (Frank) Lin uint32_t recoverable_error:1; /* 1:recoverable (correctable */ 1774cb46380STseng-Hui (Frank) Lin /* or successfully retried) */ 1784cb46380STseng-Hui (Frank) Lin uint32_t degraded_operation:1; /* 1:Unrecoverable err, bypassed*/ 1794cb46380STseng-Hui (Frank) Lin /* - degraded operation (e.g. */ 1804cb46380STseng-Hui (Frank) Lin /* CPU or mem taken off-line) */ 1814cb46380STseng-Hui (Frank) Lin uint32_t predictive_error:1; 1824cb46380STseng-Hui (Frank) Lin uint32_t new_log:1; /* 1:"New" log (Always 1 for */ 1834cb46380STseng-Hui (Frank) Lin /* data returned from RTAS */ 1844cb46380STseng-Hui (Frank) Lin uint32_t big_endian:1; /* 1: Big endian */ 1854cb46380STseng-Hui (Frank) Lin uint32_t :1; /* reserved */ 1864cb46380STseng-Hui (Frank) Lin /* Byte 1 */ 1874cb46380STseng-Hui (Frank) Lin uint32_t :8; /* reserved */ 1884cb46380STseng-Hui (Frank) Lin /* Byte 2 */ 1894cb46380STseng-Hui (Frank) Lin uint32_t powerpc_format:1; /* Set to 1 (indicating log is */ 1904cb46380STseng-Hui (Frank) Lin /* in PowerPC format */ 1914cb46380STseng-Hui (Frank) Lin uint32_t :3; /* reserved */ 1924cb46380STseng-Hui (Frank) Lin uint32_t log_format:4; /* Log format indicator. Define */ 1934cb46380STseng-Hui (Frank) Lin /* format used for byte 12-2047 */ 1944cb46380STseng-Hui (Frank) Lin /* Byte 3 */ 1954cb46380STseng-Hui (Frank) Lin uint32_t :8; /* reserved */ 1964cb46380STseng-Hui (Frank) Lin /* Byte 4-11 */ 1974cb46380STseng-Hui (Frank) Lin uint8_t reserved[8]; /* reserved */ 1984cb46380STseng-Hui (Frank) Lin /* Byte 12-15 */ 1994cb46380STseng-Hui (Frank) Lin uint32_t company_id; /* Company ID of the company */ 2004cb46380STseng-Hui (Frank) Lin /* that defines the format for */ 2014cb46380STseng-Hui (Frank) Lin /* the vendor specific log type */ 2024cb46380STseng-Hui (Frank) Lin /* Byte 16-end of log */ 2034cb46380STseng-Hui (Frank) Lin uint8_t vendor_log[1]; /* Start of vendor specific log */ 2044cb46380STseng-Hui (Frank) Lin /* Variable length. */ 205b8b572e1SStephen Rothwell }; 206b8b572e1SStephen Rothwell 207b8b572e1SStephen Rothwell /* 208b8b572e1SStephen Rothwell * This can be set by the rtas_flash module so that it can get called 209b8b572e1SStephen Rothwell * as the absolutely last thing before the kernel terminates. 210b8b572e1SStephen Rothwell */ 211b8b572e1SStephen Rothwell extern void (*rtas_flash_term_hook)(int); 212b8b572e1SStephen Rothwell 213b8b572e1SStephen Rothwell extern struct rtas_t rtas; 214b8b572e1SStephen Rothwell 215b8b572e1SStephen Rothwell extern void enter_rtas(unsigned long); 216b8b572e1SStephen Rothwell extern int rtas_token(const char *service); 217b8b572e1SStephen Rothwell extern int rtas_service_present(const char *service); 218b8b572e1SStephen Rothwell extern int rtas_call(int token, int, int, int *, ...); 219b8b572e1SStephen Rothwell extern void rtas_restart(char *cmd); 220b8b572e1SStephen Rothwell extern void rtas_power_off(void); 221b8b572e1SStephen Rothwell extern void rtas_halt(void); 222b8b572e1SStephen Rothwell extern void rtas_os_term(char *str); 223b8b572e1SStephen Rothwell extern int rtas_get_sensor(int sensor, int index, int *state); 224b8b572e1SStephen Rothwell extern int rtas_get_power_level(int powerdomain, int *level); 225b8b572e1SStephen Rothwell extern int rtas_set_power_level(int powerdomain, int level, int *setlevel); 226edc72ac4SNathan Lynch extern bool rtas_indicator_present(int token, int *maxindex); 227b8b572e1SStephen Rothwell extern int rtas_set_indicator(int indicator, int index, int new_value); 228b8b572e1SStephen Rothwell extern int rtas_set_indicator_fast(int indicator, int index, int new_value); 229b8b572e1SStephen Rothwell extern void rtas_progress(char *s, unsigned short hex); 230b8b572e1SStephen Rothwell extern void rtas_initialize(void); 2318fe93f8dSBrian King extern int rtas_suspend_cpu(struct rtas_suspend_me_data *data); 2328fe93f8dSBrian King extern int rtas_suspend_last_cpu(struct rtas_suspend_me_data *data); 233d8862be1SNathan Fontenot extern int rtas_ibm_suspend_me(struct rtas_args *); 234b8b572e1SStephen Rothwell 235b8b572e1SStephen Rothwell struct rtc_time; 236b8b572e1SStephen Rothwell extern unsigned long rtas_get_boot_time(void); 237b8b572e1SStephen Rothwell extern void rtas_get_rtc_time(struct rtc_time *rtc_time); 238b8b572e1SStephen Rothwell extern int rtas_set_rtc_time(struct rtc_time *rtc_time); 239b8b572e1SStephen Rothwell 240b8b572e1SStephen Rothwell extern unsigned int rtas_busy_delay_time(int status); 241b8b572e1SStephen Rothwell extern unsigned int rtas_busy_delay(int status); 242b8b572e1SStephen Rothwell 243b8b572e1SStephen Rothwell extern int early_init_dt_scan_rtas(unsigned long node, 244b8b572e1SStephen Rothwell const char *uname, int depth, void *data); 245b8b572e1SStephen Rothwell 246b8b572e1SStephen Rothwell extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal); 247b8b572e1SStephen Rothwell 248df17f56dSRavi K. Nittala #ifdef CONFIG_PPC_RTAS_DAEMON 249df17f56dSRavi K. Nittala extern void rtas_cancel_event_scan(void); 250df17f56dSRavi K. Nittala #else 251df17f56dSRavi K. Nittala static inline void rtas_cancel_event_scan(void) { } 252df17f56dSRavi K. Nittala #endif 253df17f56dSRavi K. Nittala 254b8b572e1SStephen Rothwell /* Error types logged. */ 255b8b572e1SStephen Rothwell #define ERR_FLAG_ALREADY_LOGGED 0x0 256b8b572e1SStephen Rothwell #define ERR_FLAG_BOOT 0x1 /* log was pulled from NVRAM on boot */ 257b8b572e1SStephen Rothwell #define ERR_TYPE_RTAS_LOG 0x2 /* from rtas event-scan */ 2586c493685SJim Keniston #define ERR_TYPE_KERNEL_PANIC 0x4 /* from die()/panic() */ 2596c493685SJim Keniston #define ERR_TYPE_KERNEL_PANIC_GZ 0x8 /* ditto, compressed */ 260b8b572e1SStephen Rothwell 261b8b572e1SStephen Rothwell /* All the types and not flags */ 2626c493685SJim Keniston #define ERR_TYPE_MASK \ 2636c493685SJim Keniston (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC | ERR_TYPE_KERNEL_PANIC_GZ) 264b8b572e1SStephen Rothwell 265b8b572e1SStephen Rothwell #define RTAS_DEBUG KERN_DEBUG "RTAS: " 266b8b572e1SStephen Rothwell 267b8b572e1SStephen Rothwell #define RTAS_ERROR_LOG_MAX 2048 268b8b572e1SStephen Rothwell 269b8b572e1SStephen Rothwell /* 270b8b572e1SStephen Rothwell * Return the firmware-specified size of the error log buffer 271b8b572e1SStephen Rothwell * for all rtas calls that require an error buffer argument. 272b8b572e1SStephen Rothwell * This includes 'check-exception' and 'rtas-last-error'. 273b8b572e1SStephen Rothwell */ 274b8b572e1SStephen Rothwell extern int rtas_get_error_log_max(void); 275b8b572e1SStephen Rothwell 276b8b572e1SStephen Rothwell /* Event Scan Parameters */ 277b8b572e1SStephen Rothwell #define EVENT_SCAN_ALL_EVENTS 0xf0000000 278b8b572e1SStephen Rothwell #define SURVEILLANCE_TOKEN 9000 279b8b572e1SStephen Rothwell #define LOG_NUMBER 64 /* must be a power of two */ 280b8b572e1SStephen Rothwell #define LOG_NUMBER_MASK (LOG_NUMBER-1) 281b8b572e1SStephen Rothwell 282b8b572e1SStephen Rothwell /* Some RTAS ops require a data buffer and that buffer must be < 4G. 283b8b572e1SStephen Rothwell * Rather than having a memory allocator, just use this buffer 284b8b572e1SStephen Rothwell * (get the lock first), make the RTAS call. Copy the data instead 285b8b572e1SStephen Rothwell * of holding the buffer for long. 286b8b572e1SStephen Rothwell */ 287b8b572e1SStephen Rothwell 288b8b572e1SStephen Rothwell #define RTAS_DATA_BUF_SIZE 4096 289b8b572e1SStephen Rothwell extern spinlock_t rtas_data_buf_lock; 290b8b572e1SStephen Rothwell extern char rtas_data_buf[RTAS_DATA_BUF_SIZE]; 291b8b572e1SStephen Rothwell 292b8b572e1SStephen Rothwell /* RMO buffer reserved for user-space RTAS use */ 293b8b572e1SStephen Rothwell extern unsigned long rtas_rmo_buf; 294b8b572e1SStephen Rothwell 295b8b572e1SStephen Rothwell #define GLOBAL_INTERRUPT_QUEUE 9005 296b8b572e1SStephen Rothwell 297b8b572e1SStephen Rothwell /** 298b8b572e1SStephen Rothwell * rtas_config_addr - Format a busno, devfn and reg for RTAS. 299b8b572e1SStephen Rothwell * @busno: The bus number. 300b8b572e1SStephen Rothwell * @devfn: The device and function number as encoded by PCI_DEVFN(). 301b8b572e1SStephen Rothwell * @reg: The register number. 302b8b572e1SStephen Rothwell * 303b8b572e1SStephen Rothwell * This function encodes the given busno, devfn and register number as 304b8b572e1SStephen Rothwell * required for RTAS calls that take a "config_addr" parameter. 305b8b572e1SStephen Rothwell * See PAPR requirement 7.3.4-1 for more info. 306b8b572e1SStephen Rothwell */ 307b8b572e1SStephen Rothwell static inline u32 rtas_config_addr(int busno, int devfn, int reg) 308b8b572e1SStephen Rothwell { 309b8b572e1SStephen Rothwell return ((reg & 0xf00) << 20) | ((busno & 0xff) << 16) | 310b8b572e1SStephen Rothwell (devfn << 8) | (reg & 0xff); 311b8b572e1SStephen Rothwell } 312b8b572e1SStephen Rothwell 313c4007a2fSBenjamin Herrenschmidt extern void __cpuinit rtas_give_timebase(void); 314c4007a2fSBenjamin Herrenschmidt extern void __cpuinit rtas_take_timebase(void); 315c4007a2fSBenjamin Herrenschmidt 3168a3e3d31Ssukadev@linux.vnet.ibm.com #ifdef CONFIG_PPC_RTAS 3178a3e3d31Ssukadev@linux.vnet.ibm.com static inline int page_is_rtas_user_buf(unsigned long pfn) 3188a3e3d31Ssukadev@linux.vnet.ibm.com { 3198a3e3d31Ssukadev@linux.vnet.ibm.com unsigned long paddr = (pfn << PAGE_SHIFT); 3208a3e3d31Ssukadev@linux.vnet.ibm.com if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf + RTAS_RMOBUF_MAX)) 3218a3e3d31Ssukadev@linux.vnet.ibm.com return 1; 3228a3e3d31Ssukadev@linux.vnet.ibm.com return 0; 3238a3e3d31Ssukadev@linux.vnet.ibm.com } 3248a3e3d31Ssukadev@linux.vnet.ibm.com #else 3258a3e3d31Ssukadev@linux.vnet.ibm.com static inline int page_is_rtas_user_buf(unsigned long pfn) { return 0;} 3268a3e3d31Ssukadev@linux.vnet.ibm.com #endif 3278a3e3d31Ssukadev@linux.vnet.ibm.com 328b8b572e1SStephen Rothwell #endif /* __KERNEL__ */ 329b8b572e1SStephen Rothwell #endif /* _POWERPC_RTAS_H */ 330