arch/powerpc/include/asm/rtas.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef _POWERPC_RTAS_H
 #define _POWERPC_RTAS_H
 #ifdef __KERNEL__

 #include <linux/spinlock.h>
 #include <asm/page.h>
 #include <asm/rtas-types.h>
 #include <linux/time.h>
 #include <linux/cpumask.h>

 /*
  * Definitions for talking to the RTAS on CHRP machines.
  *
  * Copyright (C) 2001 Peter Bergner
  * Copyright (C) 2001 PPC 64 Team, IBM Corp
  */

 #define RTAS_UNKNOWN_SERVICE (-1)
 #define RTAS_INSTANTIATE_MAX (1ULL<<30) /* Don't instantiate rtas at/above this value */

 /* Buffer size for ppc_rtas system call. */
 #define RTAS_RMOBUF_MAX (64 * 1024)

 /* RTAS return status codes */
 #define RTAS_BUSY		-2    /* RTAS Busy */
 #define RTAS_EXTENDED_DELAY_MIN	9900
 #define RTAS_EXTENDED_DELAY_MAX	9905

 /* statuses specific to ibm,suspend-me */
 #define RTAS_SUSPEND_ABORTED     9000 /* Suspension aborted */
 #define RTAS_NOT_SUSPENDABLE    -9004 /* Partition not suspendable */
 #define RTAS_THREADS_ACTIVE     -9005 /* Multiple processor threads active */
 #define RTAS_OUTSTANDING_COPROC -9006 /* Outstanding coprocessor operations */

 /*
  * In general to call RTAS use rtas_token("string") to lookup
  * an RTAS token for the given string (e.g. "event-scan").
  * To actually perform the call use
  *    ret = rtas_call(token, n_in, n_out, ...)
  * Where n_in is the number of input parameters and
  *       n_out is the number of output parameters
  *
  * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
  * will be returned as a token.  rtas_call() does look for this
  * token and error out gracefully so rtas_call(rtas_token("str"), ...)
  * may be safely used for one-shot calls to RTAS.
  *
  */

 /* RTAS event classes */
 #define RTAS_INTERNAL_ERROR		0x80000000 /* set bit 0 */
 #define RTAS_EPOW_WARNING		0x40000000 /* set bit 1 */
 #define RTAS_HOTPLUG_EVENTS		0x10000000 /* set bit 3 */
 #define RTAS_IO_EVENTS			0x08000000 /* set bit 4 */
 #define RTAS_EVENT_SCAN_ALL_EVENTS	0xffffffff

 /* RTAS event severity */
 #define RTAS_SEVERITY_FATAL		0x5
 #define RTAS_SEVERITY_ERROR		0x4
 #define RTAS_SEVERITY_ERROR_SYNC	0x3
 #define RTAS_SEVERITY_WARNING		0x2
 #define RTAS_SEVERITY_EVENT		0x1
 #define RTAS_SEVERITY_NO_ERROR		0x0

 /* RTAS event disposition */
 #define RTAS_DISP_FULLY_RECOVERED	0x0
 #define RTAS_DISP_LIMITED_RECOVERY	0x1
 #define RTAS_DISP_NOT_RECOVERED		0x2

 /* RTAS event initiator */
 #define RTAS_INITIATOR_UNKNOWN		0x0
 #define RTAS_INITIATOR_CPU		0x1
 #define RTAS_INITIATOR_PCI		0x2
 #define RTAS_INITIATOR_ISA		0x3
 #define RTAS_INITIATOR_MEMORY		0x4
 #define RTAS_INITIATOR_POWERMGM		0x5

 /* RTAS event target */
 #define RTAS_TARGET_UNKNOWN		0x0
 #define RTAS_TARGET_CPU			0x1
 #define RTAS_TARGET_PCI			0x2
 #define RTAS_TARGET_ISA			0x3
 #define RTAS_TARGET_MEMORY		0x4
 #define RTAS_TARGET_POWERMGM		0x5

 /* RTAS event type */
 #define RTAS_TYPE_RETRY			0x01
 #define RTAS_TYPE_TCE_ERR		0x02
 #define RTAS_TYPE_INTERN_DEV_FAIL	0x03
 #define RTAS_TYPE_TIMEOUT		0x04
 #define RTAS_TYPE_DATA_PARITY		0x05
 #define RTAS_TYPE_ADDR_PARITY		0x06
 #define RTAS_TYPE_CACHE_PARITY		0x07
 #define RTAS_TYPE_ADDR_INVALID		0x08
 #define RTAS_TYPE_ECC_UNCORR		0x09
 #define RTAS_TYPE_ECC_CORR		0x0a
 #define RTAS_TYPE_EPOW			0x40
 #define RTAS_TYPE_PLATFORM		0xE0
 #define RTAS_TYPE_IO			0xE1
 #define RTAS_TYPE_INFO			0xE2
 #define RTAS_TYPE_DEALLOC		0xE3
 #define RTAS_TYPE_DUMP			0xE4
 #define RTAS_TYPE_HOTPLUG		0xE5
 /* I don't add PowerMGM events right now, this is a different topic */
 #define RTAS_TYPE_PMGM_POWER_SW_ON	0x60
 #define RTAS_TYPE_PMGM_POWER_SW_OFF	0x61
 #define RTAS_TYPE_PMGM_LID_OPEN		0x62
 #define RTAS_TYPE_PMGM_LID_CLOSE	0x63
 #define RTAS_TYPE_PMGM_SLEEP_BTN	0x64
 #define RTAS_TYPE_PMGM_WAKE_BTN		0x65
 #define RTAS_TYPE_PMGM_BATTERY_WARN	0x66
 #define RTAS_TYPE_PMGM_BATTERY_CRIT	0x67
 #define RTAS_TYPE_PMGM_SWITCH_TO_BAT	0x68
 #define RTAS_TYPE_PMGM_SWITCH_TO_AC	0x69
 #define RTAS_TYPE_PMGM_KBD_OR_MOUSE	0x6a
 #define RTAS_TYPE_PMGM_ENCLOS_OPEN	0x6b
 #define RTAS_TYPE_PMGM_ENCLOS_CLOSED	0x6c
 #define RTAS_TYPE_PMGM_RING_INDICATE	0x6d
 #define RTAS_TYPE_PMGM_LAN_ATTENTION	0x6e
 #define RTAS_TYPE_PMGM_TIME_ALARM	0x6f
 #define RTAS_TYPE_PMGM_CONFIG_CHANGE	0x70
 #define RTAS_TYPE_PMGM_SERVICE_PROC	0x71
 /* Platform Resource Reassignment Notification */
 #define RTAS_TYPE_PRRN			0xA0

 /* RTAS check-exception vector offset */
 #define RTAS_VECTOR_EXTERNAL_INTERRUPT	0x500

 static inline uint8_t rtas_error_severity(const struct rtas_error_log *elog)
 {
 	return (elog->byte1 & 0xE0) >> 5;
 }

 static inline uint8_t rtas_error_disposition(const struct rtas_error_log *elog)
 {
 	return (elog->byte1 & 0x18) >> 3;
 }

 static inline
 void rtas_set_disposition_recovered(struct rtas_error_log *elog)
 {
 	elog->byte1 &= ~0x18;
 	elog->byte1 |= (RTAS_DISP_FULLY_RECOVERED << 3);
 }

 static inline uint8_t rtas_error_extended(const struct rtas_error_log *elog)
 {
 	return (elog->byte1 & 0x04) >> 2;
 }

 static inline uint8_t rtas_error_initiator(const struct rtas_error_log *elog)
 {
 	return (elog->byte2 & 0xf0) >> 4;
 }

 #define rtas_error_type(x)	((x)->byte3)

 static inline
 uint32_t rtas_error_extended_log_length(const struct rtas_error_log *elog)
 {
 	return be32_to_cpu(elog->extended_log_length);
 }

 #define RTAS_V6EXT_LOG_FORMAT_EVENT_LOG	14

 #define RTAS_V6EXT_COMPANY_ID_IBM	(('I' << 24) | ('B' << 16) | ('M' << 8))

 static
 inline uint8_t rtas_ext_event_log_format(struct rtas_ext_event_log_v6 *ext_log)
 {
 	return ext_log->byte2 & 0x0F;
 }

 static
 inline uint32_t rtas_ext_event_company_id(struct rtas_ext_event_log_v6 *ext_log)
 {
 	return be32_to_cpu(ext_log->company_id);
 }

 /* pSeries event log format */

 /* Two bytes ASCII section IDs */
 #define PSERIES_ELOG_SECT_ID_PRIV_HDR		(('P' << 8) | 'H')
 #define PSERIES_ELOG_SECT_ID_USER_HDR		(('U' << 8) | 'H')
 #define PSERIES_ELOG_SECT_ID_PRIMARY_SRC	(('P' << 8) | 'S')
 #define PSERIES_ELOG_SECT_ID_EXTENDED_UH	(('E' << 8) | 'H')
 #define PSERIES_ELOG_SECT_ID_FAILING_MTMS	(('M' << 8) | 'T')
 #define PSERIES_ELOG_SECT_ID_SECONDARY_SRC	(('S' << 8) | 'S')
 #define PSERIES_ELOG_SECT_ID_DUMP_LOCATOR	(('D' << 8) | 'H')
 #define PSERIES_ELOG_SECT_ID_FW_ERROR		(('S' << 8) | 'W')
 #define PSERIES_ELOG_SECT_ID_IMPACT_PART_ID	(('L' << 8) | 'P')
 #define PSERIES_ELOG_SECT_ID_LOGIC_RESOURCE_ID	(('L' << 8) | 'R')
 #define PSERIES_ELOG_SECT_ID_HMC_ID		(('H' << 8) | 'M')
 #define PSERIES_ELOG_SECT_ID_EPOW		(('E' << 8) | 'P')
 #define PSERIES_ELOG_SECT_ID_IO_EVENT		(('I' << 8) | 'E')
 #define PSERIES_ELOG_SECT_ID_MANUFACT_INFO	(('M' << 8) | 'I')
 #define PSERIES_ELOG_SECT_ID_CALL_HOME		(('C' << 8) | 'H')
 #define PSERIES_ELOG_SECT_ID_USER_DEF		(('U' << 8) | 'D')
 #define PSERIES_ELOG_SECT_ID_HOTPLUG		(('H' << 8) | 'P')
 #define PSERIES_ELOG_SECT_ID_MCE		(('M' << 8) | 'C')

 static
 inline uint16_t pseries_errorlog_id(struct pseries_errorlog *sect)
 {
 	return be16_to_cpu(sect->id);
 }

 static
 inline uint16_t pseries_errorlog_length(struct pseries_errorlog *sect)
 {
 	return be16_to_cpu(sect->length);
 }

 #define PSERIES_HP_ELOG_RESOURCE_CPU	1
 #define PSERIES_HP_ELOG_RESOURCE_MEM	2
 #define PSERIES_HP_ELOG_RESOURCE_SLOT	3
 #define PSERIES_HP_ELOG_RESOURCE_PHB	4
 #define PSERIES_HP_ELOG_RESOURCE_PMEM   6

 #define PSERIES_HP_ELOG_ACTION_ADD	1
 #define PSERIES_HP_ELOG_ACTION_REMOVE	2

 #define PSERIES_HP_ELOG_ID_DRC_NAME	1
 #define PSERIES_HP_ELOG_ID_DRC_INDEX	2
 #define PSERIES_HP_ELOG_ID_DRC_COUNT	3
 #define PSERIES_HP_ELOG_ID_DRC_IC	4

 struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
 					      uint16_t section_id);

 /*
  * This can be set by the rtas_flash module so that it can get called
  * as the absolutely last thing before the kernel terminates.
  */
 extern void (*rtas_flash_term_hook)(int);

 extern struct rtas_t rtas;

 extern int rtas_token(const char *service);
 extern int rtas_service_present(const char *service);
 extern int rtas_call(int token, int, int, int *, ...);
 int rtas_call_reentrant(int token, int nargs, int nret, int *outputs, ...);
 void rtas_call_unlocked(struct rtas_args *args, int token, int nargs,
 			int nret, ...);
 extern void __noreturn rtas_restart(char *cmd);
 extern void rtas_power_off(void);
 extern void __noreturn rtas_halt(void);
 extern void rtas_os_term(char *str);
 void rtas_activate_firmware(void);
 extern int rtas_get_sensor(int sensor, int index, int *state);
 extern int rtas_get_sensor_fast(int sensor, int index, int *state);
 extern int rtas_get_power_level(int powerdomain, int *level);
 extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
 extern bool rtas_indicator_present(int token, int *maxindex);
 extern int rtas_set_indicator(int indicator, int index, int new_value);
 extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
 extern void rtas_progress(char *s, unsigned short hex);
 int rtas_ibm_suspend_me(int *fw_status);

 struct rtc_time;
 extern time64_t rtas_get_boot_time(void);
 extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
 extern int rtas_set_rtc_time(struct rtc_time *rtc_time);

 extern unsigned int rtas_busy_delay_time(int status);
 extern unsigned int rtas_busy_delay(int status);

 extern int early_init_dt_scan_rtas(unsigned long node,
 		const char *uname, int depth, void *data);

 extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);

 #ifdef CONFIG_PPC_PSERIES
 extern time64_t last_rtas_event;
 extern int clobbering_unread_rtas_event(void);
 extern int pseries_devicetree_update(s32 scope);
 extern void post_mobility_fixup(void);
 int rtas_syscall_dispatch_ibm_suspend_me(u64 handle);
 #else
 static inline int clobbering_unread_rtas_event(void) { return 0; }
 static inline int rtas_syscall_dispatch_ibm_suspend_me(u64 handle)
 {
 	return -EINVAL;
 }
 #endif

 #ifdef CONFIG_PPC_RTAS_DAEMON
 extern void rtas_cancel_event_scan(void);
 #else
 static inline void rtas_cancel_event_scan(void) { }
 #endif

 /* Error types logged.  */
 #define ERR_FLAG_ALREADY_LOGGED	0x0
 #define ERR_FLAG_BOOT		0x1 	/* log was pulled from NVRAM on boot */
 #define ERR_TYPE_RTAS_LOG	0x2	/* from rtas event-scan */
 #define ERR_TYPE_KERNEL_PANIC	0x4	/* from die()/panic() */
 #define ERR_TYPE_KERNEL_PANIC_GZ 0x8	/* ditto, compressed */

 /* All the types and not flags */
 #define ERR_TYPE_MASK \
 	(ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC | ERR_TYPE_KERNEL_PANIC_GZ)

 #define RTAS_DEBUG KERN_DEBUG "RTAS: "

 #define RTAS_ERROR_LOG_MAX 2048

 /*
  * Return the firmware-specified size of the error log buffer
  *  for all rtas calls that require an error buffer argument.
  *  This includes 'check-exception' and 'rtas-last-error'.
  */
 extern int rtas_get_error_log_max(void);

 /* Event Scan Parameters */
 #define EVENT_SCAN_ALL_EVENTS	0xf0000000
 #define SURVEILLANCE_TOKEN	9000
 #define LOG_NUMBER		64		/* must be a power of two */
 #define LOG_NUMBER_MASK		(LOG_NUMBER-1)

 /* Some RTAS ops require a data buffer and that buffer must be < 4G.
  * Rather than having a memory allocator, just use this buffer
  * (get the lock first), make the RTAS call.  Copy the data instead
  * of holding the buffer for long.
  */

 #define RTAS_DATA_BUF_SIZE 4096
 extern spinlock_t rtas_data_buf_lock;
 extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];

 /* RMO buffer reserved for user-space RTAS use */
 extern unsigned long rtas_rmo_buf;

 #define GLOBAL_INTERRUPT_QUEUE 9005

 /**
  * rtas_config_addr - Format a busno, devfn and reg for RTAS.
  * @busno: The bus number.
  * @devfn: The device and function number as encoded by PCI_DEVFN().
  * @reg: The register number.
  *
  * This function encodes the given busno, devfn and register number as
  * required for RTAS calls that take a "config_addr" parameter.
  * See PAPR requirement 7.3.4-1 for more info.
  */
 static inline u32 rtas_config_addr(int busno, int devfn, int reg)
 {
 	return ((reg & 0xf00) << 20) | ((busno & 0xff) << 16) |
 			(devfn << 8) | (reg & 0xff);
 }

 extern void rtas_give_timebase(void);
 extern void rtas_take_timebase(void);

 #ifdef CONFIG_PPC_RTAS
 static inline int page_is_rtas_user_buf(unsigned long pfn)
 {
 	unsigned long paddr = (pfn << PAGE_SHIFT);
 	if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf + RTAS_RMOBUF_MAX))
 		return 1;
 	return 0;
 }

 /* Not the best place to put pSeries_coalesce_init, will be fixed when we
  * move some of the rtas suspend-me stuff to pseries */
 extern void pSeries_coalesce_init(void);
 void rtas_initialize(void);
 #else
 static inline int page_is_rtas_user_buf(unsigned long pfn) { return 0;}
 static inline void pSeries_coalesce_init(void) { }
 static inline void rtas_initialize(void) { };
 #endif

 extern int call_rtas(const char *, int, int, unsigned long *, ...);

 #ifdef CONFIG_HV_PERF_CTRS
 void read_24x7_sys_info(void);
 #else
 static inline void read_24x7_sys_info(void) { }
 #endif

 #endif /* __KERNEL__ */
 #endif /* _POWERPC_RTAS_H */
	/* SPDX-License-Identifier: GPL-2.0-or-later */
	#ifndef _POWERPC_RTAS_H
	#define _POWERPC_RTAS_H
	#ifdef __KERNEL__

	#include <linux/spinlock.h>
	#include <asm/page.h>
	#include <asm/rtas-types.h>
	#include <linux/time.h>
	#include <linux/cpumask.h>

	/*
	* Definitions for talking to the RTAS on CHRP machines.
	*
	* Copyright (C) 2001 Peter Bergner
	* Copyright (C) 2001 PPC 64 Team, IBM Corp
	*/

	#define RTAS_UNKNOWN_SERVICE (-1)
	#define RTAS_INSTANTIATE_MAX (1ULL<<30) /* Don't instantiate rtas at/above this value */

	/* Buffer size for ppc_rtas system call. */
	#define RTAS_RMOBUF_MAX (64 * 1024)

	/* RTAS return status codes */
	#define RTAS_BUSY -2 /* RTAS Busy */
	#define RTAS_EXTENDED_DELAY_MIN 9900
	#define RTAS_EXTENDED_DELAY_MAX 9905

	/* statuses specific to ibm,suspend-me */
	#define RTAS_SUSPEND_ABORTED 9000 /* Suspension aborted */
	#define RTAS_NOT_SUSPENDABLE -9004 /* Partition not suspendable */
	#define RTAS_THREADS_ACTIVE -9005 /* Multiple processor threads active */
	#define RTAS_OUTSTANDING_COPROC -9006 /* Outstanding coprocessor operations */

	/*
	* In general to call RTAS use rtas_token("string") to lookup
	* an RTAS token for the given string (e.g. "event-scan").
	* To actually perform the call use
	* ret = rtas_call(token, n_in, n_out, ...)
	* Where n_in is the number of input parameters and
	* n_out is the number of output parameters
	*
	* If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
	* will be returned as a token. rtas_call() does look for this
	* token and error out gracefully so rtas_call(rtas_token("str"), ...)
	* may be safely used for one-shot calls to RTAS.
	*
	*/

	/* RTAS event classes */
	#define RTAS_INTERNAL_ERROR 0x80000000 /* set bit 0 */
	#define RTAS_EPOW_WARNING 0x40000000 /* set bit 1 */
	#define RTAS_HOTPLUG_EVENTS 0x10000000 /* set bit 3 */
	#define RTAS_IO_EVENTS 0x08000000 /* set bit 4 */
	#define RTAS_EVENT_SCAN_ALL_EVENTS 0xffffffff

	/* RTAS event severity */
	#define RTAS_SEVERITY_FATAL 0x5
	#define RTAS_SEVERITY_ERROR 0x4
	#define RTAS_SEVERITY_ERROR_SYNC 0x3
	#define RTAS_SEVERITY_WARNING 0x2
	#define RTAS_SEVERITY_EVENT 0x1
	#define RTAS_SEVERITY_NO_ERROR 0x0

	/* RTAS event disposition */
	#define RTAS_DISP_FULLY_RECOVERED 0x0
	#define RTAS_DISP_LIMITED_RECOVERY 0x1
	#define RTAS_DISP_NOT_RECOVERED 0x2

	/* RTAS event initiator */
	#define RTAS_INITIATOR_UNKNOWN 0x0
	#define RTAS_INITIATOR_CPU 0x1
	#define RTAS_INITIATOR_PCI 0x2
	#define RTAS_INITIATOR_ISA 0x3
	#define RTAS_INITIATOR_MEMORY 0x4
	#define RTAS_INITIATOR_POWERMGM 0x5

	/* RTAS event target */
	#define RTAS_TARGET_UNKNOWN 0x0
	#define RTAS_TARGET_CPU 0x1
	#define RTAS_TARGET_PCI 0x2
	#define RTAS_TARGET_ISA 0x3
	#define RTAS_TARGET_MEMORY 0x4
	#define RTAS_TARGET_POWERMGM 0x5

	/* RTAS event type */
	#define RTAS_TYPE_RETRY 0x01
	#define RTAS_TYPE_TCE_ERR 0x02
	#define RTAS_TYPE_INTERN_DEV_FAIL 0x03
	#define RTAS_TYPE_TIMEOUT 0x04
	#define RTAS_TYPE_DATA_PARITY 0x05
	#define RTAS_TYPE_ADDR_PARITY 0x06
	#define RTAS_TYPE_CACHE_PARITY 0x07
	#define RTAS_TYPE_ADDR_INVALID 0x08
	#define RTAS_TYPE_ECC_UNCORR 0x09
	#define RTAS_TYPE_ECC_CORR 0x0a
	#define RTAS_TYPE_EPOW 0x40
	#define RTAS_TYPE_PLATFORM 0xE0
	#define RTAS_TYPE_IO 0xE1
	#define RTAS_TYPE_INFO 0xE2
	#define RTAS_TYPE_DEALLOC 0xE3
	#define RTAS_TYPE_DUMP 0xE4
	#define RTAS_TYPE_HOTPLUG 0xE5
	/* I don't add PowerMGM events right now, this is a different topic */
	#define RTAS_TYPE_PMGM_POWER_SW_ON 0x60
	#define RTAS_TYPE_PMGM_POWER_SW_OFF 0x61
	#define RTAS_TYPE_PMGM_LID_OPEN 0x62
	#define RTAS_TYPE_PMGM_LID_CLOSE 0x63
	#define RTAS_TYPE_PMGM_SLEEP_BTN 0x64
	#define RTAS_TYPE_PMGM_WAKE_BTN 0x65
	#define RTAS_TYPE_PMGM_BATTERY_WARN 0x66
	#define RTAS_TYPE_PMGM_BATTERY_CRIT 0x67
	#define RTAS_TYPE_PMGM_SWITCH_TO_BAT 0x68
	#define RTAS_TYPE_PMGM_SWITCH_TO_AC 0x69
	#define RTAS_TYPE_PMGM_KBD_OR_MOUSE 0x6a
	#define RTAS_TYPE_PMGM_ENCLOS_OPEN 0x6b
	#define RTAS_TYPE_PMGM_ENCLOS_CLOSED 0x6c
	#define RTAS_TYPE_PMGM_RING_INDICATE 0x6d
	#define RTAS_TYPE_PMGM_LAN_ATTENTION 0x6e
	#define RTAS_TYPE_PMGM_TIME_ALARM 0x6f
	#define RTAS_TYPE_PMGM_CONFIG_CHANGE 0x70
	#define RTAS_TYPE_PMGM_SERVICE_PROC 0x71
	/* Platform Resource Reassignment Notification */
	#define RTAS_TYPE_PRRN 0xA0

	/* RTAS check-exception vector offset */
	#define RTAS_VECTOR_EXTERNAL_INTERRUPT 0x500

	static inline uint8_t rtas_error_severity(const struct rtas_error_log *elog)
	{
	return (elog->byte1 & 0xE0) >> 5;
	}

	static inline uint8_t rtas_error_disposition(const struct rtas_error_log *elog)
	{
	return (elog->byte1 & 0x18) >> 3;
	}

	static inline
	void rtas_set_disposition_recovered(struct rtas_error_log *elog)
	{
	elog->byte1 &= ~0x18;
	elog->byte1 \|= (RTAS_DISP_FULLY_RECOVERED << 3);
	}

	static inline uint8_t rtas_error_extended(const struct rtas_error_log *elog)
	{
	return (elog->byte1 & 0x04) >> 2;
	}

	static inline uint8_t rtas_error_initiator(const struct rtas_error_log *elog)
	{
	return (elog->byte2 & 0xf0) >> 4;
	}

	#define rtas_error_type(x) ((x)->byte3)

	static inline
	uint32_t rtas_error_extended_log_length(const struct rtas_error_log *elog)
	{
	return be32_to_cpu(elog->extended_log_length);
	}

	#define RTAS_V6EXT_LOG_FORMAT_EVENT_LOG 14

	#define RTAS_V6EXT_COMPANY_ID_IBM (('I' << 24) \| ('B' << 16) \| ('M' << 8))

	static
	inline uint8_t rtas_ext_event_log_format(struct rtas_ext_event_log_v6 *ext_log)
	{
	return ext_log->byte2 & 0x0F;
	}

	static
	inline uint32_t rtas_ext_event_company_id(struct rtas_ext_event_log_v6 *ext_log)
	{
	return be32_to_cpu(ext_log->company_id);
	}

	/* pSeries event log format */

	/* Two bytes ASCII section IDs */
	#define PSERIES_ELOG_SECT_ID_PRIV_HDR (('P' << 8) \| 'H')
	#define PSERIES_ELOG_SECT_ID_USER_HDR (('U' << 8) \| 'H')
	#define PSERIES_ELOG_SECT_ID_PRIMARY_SRC (('P' << 8) \| 'S')
	#define PSERIES_ELOG_SECT_ID_EXTENDED_UH (('E' << 8) \| 'H')
	#define PSERIES_ELOG_SECT_ID_FAILING_MTMS (('M' << 8) \| 'T')
	#define PSERIES_ELOG_SECT_ID_SECONDARY_SRC (('S' << 8) \| 'S')
	#define PSERIES_ELOG_SECT_ID_DUMP_LOCATOR (('D' << 8) \| 'H')
	#define PSERIES_ELOG_SECT_ID_FW_ERROR (('S' << 8) \| 'W')
	#define PSERIES_ELOG_SECT_ID_IMPACT_PART_ID (('L' << 8) \| 'P')
	#define PSERIES_ELOG_SECT_ID_LOGIC_RESOURCE_ID (('L' << 8) \| 'R')
	#define PSERIES_ELOG_SECT_ID_HMC_ID (('H' << 8) \| 'M')
	#define PSERIES_ELOG_SECT_ID_EPOW (('E' << 8) \| 'P')
	#define PSERIES_ELOG_SECT_ID_IO_EVENT (('I' << 8) \| 'E')
	#define PSERIES_ELOG_SECT_ID_MANUFACT_INFO (('M' << 8) \| 'I')
	#define PSERIES_ELOG_SECT_ID_CALL_HOME (('C' << 8) \| 'H')
	#define PSERIES_ELOG_SECT_ID_USER_DEF (('U' << 8) \| 'D')
	#define PSERIES_ELOG_SECT_ID_HOTPLUG (('H' << 8) \| 'P')
	#define PSERIES_ELOG_SECT_ID_MCE (('M' << 8) \| 'C')

	static
	inline uint16_t pseries_errorlog_id(struct pseries_errorlog *sect)
	{
	return be16_to_cpu(sect->id);
	}

	static
	inline uint16_t pseries_errorlog_length(struct pseries_errorlog *sect)
	{
	return be16_to_cpu(sect->length);
	}

	#define PSERIES_HP_ELOG_RESOURCE_CPU 1
	#define PSERIES_HP_ELOG_RESOURCE_MEM 2
	#define PSERIES_HP_ELOG_RESOURCE_SLOT 3
	#define PSERIES_HP_ELOG_RESOURCE_PHB 4
	#define PSERIES_HP_ELOG_RESOURCE_PMEM 6

	#define PSERIES_HP_ELOG_ACTION_ADD 1
	#define PSERIES_HP_ELOG_ACTION_REMOVE 2

	#define PSERIES_HP_ELOG_ID_DRC_NAME 1
	#define PSERIES_HP_ELOG_ID_DRC_INDEX 2
	#define PSERIES_HP_ELOG_ID_DRC_COUNT 3
	#define PSERIES_HP_ELOG_ID_DRC_IC 4

	struct pseries_errorlog get_pseries_errorlog(struct rtas_error_log log,
	uint16_t section_id);

	/*
	* This can be set by the rtas_flash module so that it can get called
	* as the absolutely last thing before the kernel terminates.
	*/
	extern void (*rtas_flash_term_hook)(int);

	extern struct rtas_t rtas;

	extern int rtas_token(const char *service);
	extern int rtas_service_present(const char *service);
	extern int rtas_call(int token, int, int, int *, ...);
	int rtas_call_reentrant(int token, int nargs, int nret, int *outputs, ...);
	void rtas_call_unlocked(struct rtas_args *args, int token, int nargs,
	int nret, ...);
	extern void __noreturn rtas_restart(char *cmd);
	extern void rtas_power_off(void);
	extern void __noreturn rtas_halt(void);
	extern void rtas_os_term(char *str);
	void rtas_activate_firmware(void);
	extern int rtas_get_sensor(int sensor, int index, int *state);
	extern int rtas_get_sensor_fast(int sensor, int index, int *state);
	extern int rtas_get_power_level(int powerdomain, int *level);
	extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
	extern bool rtas_indicator_present(int token, int *maxindex);
	extern int rtas_set_indicator(int indicator, int index, int new_value);
	extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
	extern void rtas_progress(char *s, unsigned short hex);
	int rtas_ibm_suspend_me(int *fw_status);

	struct rtc_time;
	extern time64_t rtas_get_boot_time(void);
	extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
	extern int rtas_set_rtc_time(struct rtc_time *rtc_time);

	extern unsigned int rtas_busy_delay_time(int status);
	extern unsigned int rtas_busy_delay(int status);

	extern int early_init_dt_scan_rtas(unsigned long node,
	const char uname, int depth, void data);

	extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);

	#ifdef CONFIG_PPC_PSERIES
	extern time64_t last_rtas_event;
	extern int clobbering_unread_rtas_event(void);
	extern int pseries_devicetree_update(s32 scope);
	extern void post_mobility_fixup(void);
	int rtas_syscall_dispatch_ibm_suspend_me(u64 handle);
	#else
	static inline int clobbering_unread_rtas_event(void) { return 0; }
	static inline int rtas_syscall_dispatch_ibm_suspend_me(u64 handle)
	{
	return -EINVAL;
	}
	#endif

	#ifdef CONFIG_PPC_RTAS_DAEMON
	extern void rtas_cancel_event_scan(void);
	#else
	static inline void rtas_cancel_event_scan(void) { }
	#endif

	/* Error types logged. */
	#define ERR_FLAG_ALREADY_LOGGED 0x0
	#define ERR_FLAG_BOOT 0x1 /* log was pulled from NVRAM on boot */
	#define ERR_TYPE_RTAS_LOG 0x2 /* from rtas event-scan */
	#define ERR_TYPE_KERNEL_PANIC 0x4 /* from die()/panic() */
	#define ERR_TYPE_KERNEL_PANIC_GZ 0x8 /* ditto, compressed */

	/* All the types and not flags */
	#define ERR_TYPE_MASK \
	(ERR_TYPE_RTAS_LOG \| ERR_TYPE_KERNEL_PANIC \| ERR_TYPE_KERNEL_PANIC_GZ)

	#define RTAS_DEBUG KERN_DEBUG "RTAS: "

	#define RTAS_ERROR_LOG_MAX 2048

	/*
	* Return the firmware-specified size of the error log buffer
	* for all rtas calls that require an error buffer argument.
	* This includes 'check-exception' and 'rtas-last-error'.
	*/
	extern int rtas_get_error_log_max(void);

	/* Event Scan Parameters */
	#define EVENT_SCAN_ALL_EVENTS 0xf0000000
	#define SURVEILLANCE_TOKEN 9000
	#define LOG_NUMBER 64 /* must be a power of two */
	#define LOG_NUMBER_MASK (LOG_NUMBER-1)

	/* Some RTAS ops require a data buffer and that buffer must be < 4G.
	* Rather than having a memory allocator, just use this buffer
	* (get the lock first), make the RTAS call. Copy the data instead
	* of holding the buffer for long.
	*/

	#define RTAS_DATA_BUF_SIZE 4096
	extern spinlock_t rtas_data_buf_lock;
	extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];

	/* RMO buffer reserved for user-space RTAS use */
	extern unsigned long rtas_rmo_buf;

	#define GLOBAL_INTERRUPT_QUEUE 9005

	/**
	* rtas_config_addr - Format a busno, devfn and reg for RTAS.
	* @busno: The bus number.
	* @devfn: The device and function number as encoded by PCI_DEVFN().
	* @reg: The register number.
	*
	* This function encodes the given busno, devfn and register number as
	* required for RTAS calls that take a "config_addr" parameter.
	* See PAPR requirement 7.3.4-1 for more info.
	*/
	static inline u32 rtas_config_addr(int busno, int devfn, int reg)
	{
	return ((reg & 0xf00) << 20) \| ((busno & 0xff) << 16) \|
	(devfn << 8) \| (reg & 0xff);
	}

	extern void rtas_give_timebase(void);
	extern void rtas_take_timebase(void);

	#ifdef CONFIG_PPC_RTAS
	static inline int page_is_rtas_user_buf(unsigned long pfn)
	{
	unsigned long paddr = (pfn << PAGE_SHIFT);
	if (paddr >= rtas_rmo_buf && paddr < (rtas_rmo_buf + RTAS_RMOBUF_MAX))
	return 1;
	return 0;
	}

	/* Not the best place to put pSeries_coalesce_init, will be fixed when we
	* move some of the rtas suspend-me stuff to pseries */
	extern void pSeries_coalesce_init(void);
	void rtas_initialize(void);
	#else
	static inline int page_is_rtas_user_buf(unsigned long pfn) { return 0;}
	static inline void pSeries_coalesce_init(void) { }
	static inline void rtas_initialize(void) { };
	#endif

	extern int call_rtas(const char , int, int, unsigned long , ...);

	#ifdef CONFIG_HV_PERF_CTRS
	void read_24x7_sys_info(void);
	#else
	static inline void read_24x7_sys_info(void) { }
	#endif

	#endif /* __KERNEL__ */
	#endif /* _POWERPC_RTAS_H */