diff options
Diffstat (limited to 'arch/ppc64')
| -rw-r--r-- | arch/ppc64/Kconfig | 5 | ||||
| -rw-r--r-- | arch/ppc64/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/ppc64/kernel/rtas.c | 775 |
3 files changed, 6 insertions, 776 deletions
diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig index 963f519b771..8cc73cc1b4c 100644 --- a/arch/ppc64/Kconfig +++ b/arch/ppc64/Kconfig @@ -318,6 +318,11 @@ config PPC_RTAS depends on PPC_PSERIES || PPC_BPA default y +config RTAS_ERROR_LOGGING + bool + depends on PPC_RTAS + default y + config RTAS_PROC bool "Proc interface to RTAS" depends on PPC_RTAS diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile index 2c541c6652b..83ecefdcfef 100644 --- a/arch/ppc64/kernel/Makefile +++ b/arch/ppc64/kernel/Makefile @@ -43,7 +43,7 @@ obj-$(CONFIG_MODULES) += module.o ifneq ($(CONFIG_PPC_MERGE),y) obj-$(CONFIG_MODULES) += ppc_ksyms.o endif -obj-$(CONFIG_PPC_RTAS) += rtas.o rtas_pci.o +obj-$(CONFIG_PPC_RTAS) += rtas_pci.o obj-$(CONFIG_RTAS_PROC) += rtas-proc.o obj-$(CONFIG_SCANLOG) += scanlog.o obj-$(CONFIG_LPARCFG) += lparcfg.o diff --git a/arch/ppc64/kernel/rtas.c b/arch/ppc64/kernel/rtas.c deleted file mode 100644 index 36adab591bd..00000000000 --- a/arch/ppc64/kernel/rtas.c +++ /dev/null @@ -1,775 +0,0 @@ -/* - * - * Procedures for interfacing to the RTAS on CHRP machines. - * - * Peter Bergner, IBM March 2001. - * Copyright (C) 2001 IBM. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <stdarg.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/spinlock.h> -#include <linux/module.h> -#include <linux/init.h> - -#include <asm/prom.h> -#include <asm/rtas.h> -#include <asm/semaphore.h> -#include <asm/machdep.h> -#include <asm/page.h> -#include <asm/param.h> -#include <asm/system.h> -#include <asm/abs_addr.h> -#include <asm/udbg.h> -#include <asm/delay.h> -#include <asm/uaccess.h> -#include <asm/systemcfg.h> -#include <asm/ppcdebug.h> - -struct flash_block_list_header rtas_firmware_flash_list = {0, NULL}; - -struct rtas_t rtas = { - .lock = SPIN_LOCK_UNLOCKED -}; - -EXPORT_SYMBOL(rtas); - -char rtas_err_buf[RTAS_ERROR_LOG_MAX]; - -DEFINE_SPINLOCK(rtas_data_buf_lock); -char rtas_data_buf[RTAS_DATA_BUF_SIZE]__page_aligned; -unsigned long rtas_rmo_buf; - -void -call_rtas_display_status(unsigned char c) -{ - struct rtas_args *args = &rtas.args; - unsigned long s; - - if (!rtas.base) - return; - spin_lock_irqsave(&rtas.lock, s); - - args->token = 10; - args->nargs = 1; - args->nret = 1; - args->rets = (rtas_arg_t *)&(args->args[1]); - args->args[0] = (int)c; - - enter_rtas(__pa(args)); - - spin_unlock_irqrestore(&rtas.lock, s); -} - -void -call_rtas_display_status_delay(unsigned char c) -{ - static int pending_newline = 0; /* did last write end with unprinted newline? */ - static int width = 16; - - if (c == '\n') { - while (width-- > 0) - call_rtas_display_status(' '); - width = 16; - udelay(500000); - pending_newline = 1; - } else { - if (pending_newline) { - call_rtas_display_status('\r'); - call_rtas_display_status('\n'); - } - pending_newline = 0; - if (width--) { - call_rtas_display_status(c); - udelay(10000); - } - } -} - -void -rtas_progress(char *s, unsigned short hex) -{ - struct device_node *root; - int width, *p; - char *os; - static int display_character, set_indicator; - static int display_width, display_lines, *row_width, form_feed; - static DEFINE_SPINLOCK(progress_lock); - static int current_line; - static int pending_newline = 0; /* did last write end with unprinted newline? */ - - if (!rtas.base) - return; - - if (display_width == 0) { - display_width = 0x10; - if ((root = find_path_device("/rtas"))) { - if ((p = (unsigned int *)get_property(root, - "ibm,display-line-length", NULL))) - display_width = *p; - if ((p = (unsigned int *)get_property(root, - "ibm,form-feed", NULL))) - form_feed = *p; - if ((p = (unsigned int *)get_property(root, - "ibm,display-number-of-lines", NULL))) - display_lines = *p; - row_width = (unsigned int *)get_property(root, - "ibm,display-truncation-length", NULL); - } - display_character = rtas_token("display-character"); - set_indicator = rtas_token("set-indicator"); - } - - if (display_character == RTAS_UNKNOWN_SERVICE) { - /* use hex display if available */ - if (set_indicator != RTAS_UNKNOWN_SERVICE) - rtas_call(set_indicator, 3, 1, NULL, 6, 0, hex); - return; - } - - spin_lock(&progress_lock); - - /* - * Last write ended with newline, but we didn't print it since - * it would just clear the bottom line of output. Print it now - * instead. - * - * If no newline is pending and form feed is supported, clear the - * display with a form feed; otherwise, print a CR to start output - * at the beginning of the line. - */ - if (pending_newline) { - rtas_call(display_character, 1, 1, NULL, '\r'); - rtas_call(display_character, 1, 1, NULL, '\n'); - pending_newline = 0; - } else { - current_line = 0; - if (form_feed) - rtas_call(display_character, 1, 1, NULL, - (char)form_feed); - else - rtas_call(display_character, 1, 1, NULL, '\r'); - } - - if (row_width) - width = row_width[current_line]; - else - width = display_width; - os = s; - while (*os) { - if (*os == '\n' || *os == '\r') { - /* If newline is the last character, save it - * until next call to avoid bumping up the - * display output. - */ - if (*os == '\n' && !os[1]) { - pending_newline = 1; - current_line++; - if (current_line > display_lines-1) - current_line = display_lines-1; - spin_unlock(&progress_lock); - return; - } - - /* RTAS wants CR-LF, not just LF */ - - if (*os == '\n') { - rtas_call(display_character, 1, 1, NULL, '\r'); - rtas_call(display_character, 1, 1, NULL, '\n'); - } else { - /* CR might be used to re-draw a line, so we'll - * leave it alone and not add LF. - */ - rtas_call(display_character, 1, 1, NULL, *os); - } - - if (row_width) - width = row_width[current_line]; - else - width = display_width; - } else { - width--; - rtas_call(display_character, 1, 1, NULL, *os); - } - - os++; - - /* if we overwrite the screen length */ - if (width <= 0) - while ((*os != 0) && (*os != '\n') && (*os != '\r')) - os++; - } - - spin_unlock(&progress_lock); -} - -int -rtas_token(const char *service) -{ - int *tokp; - if (rtas.dev == NULL) { - PPCDBG(PPCDBG_RTAS,"\tNo rtas device in device-tree...\n"); - return RTAS_UNKNOWN_SERVICE; - } - tokp = (int *) get_property(rtas.dev, service, NULL); - return tokp ? *tokp : RTAS_UNKNOWN_SERVICE; -} - -/* - * 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'. - */ -int rtas_get_error_log_max(void) -{ - static int rtas_error_log_max; - if (rtas_error_log_max) - return rtas_error_log_max; - - rtas_error_log_max = rtas_token ("rtas-error-log-max"); - if ((rtas_error_log_max == RTAS_UNKNOWN_SERVICE) || - (rtas_error_log_max > RTAS_ERROR_LOG_MAX)) { - printk (KERN_WARNING "RTAS: bad log buffer size %d\n", rtas_error_log_max); - rtas_error_log_max = RTAS_ERROR_LOG_MAX; - } - return rtas_error_log_max; -} - - -/** Return a copy of the detailed error text associated with the - * most recent failed call to rtas. Because the error text - * might go stale if there are any other intervening rtas calls, - * this routine must be called atomically with whatever produced - * the error (i.e. with rtas.lock still held from the previous call). - */ -static int -__fetch_rtas_last_error(void) -{ - struct rtas_args err_args, save_args; - u32 bufsz; - - bufsz = rtas_get_error_log_max(); - - err_args.token = rtas_token("rtas-last-error"); - err_args.nargs = 2; - err_args.nret = 1; - - err_args.args[0] = (rtas_arg_t)__pa(rtas_err_buf); - err_args.args[1] = bufsz; - err_args.args[2] = 0; - - save_args = rtas.args; - rtas.args = err_args; - - enter_rtas(__pa(&rtas.args)); - - err_args = rtas.args; - rtas.args = save_args; - - return err_args.args[2]; -} - -int rtas_call(int token, int nargs, int nret, int *outputs, ...) -{ - va_list list; - int i, logit = 0; - unsigned long s; - struct rtas_args *rtas_args; - char * buff_copy = NULL; - int ret; - - PPCDBG(PPCDBG_RTAS, "Entering rtas_call\n"); - PPCDBG(PPCDBG_RTAS, "\ttoken = 0x%x\n", token); - PPCDBG(PPCDBG_RTAS, "\tnargs = %d\n", nargs); - PPCDBG(PPCDBG_RTAS, "\tnret = %d\n", nret); - PPCDBG(PPCDBG_RTAS, "\t&outputs = 0x%lx\n", outputs); - if (token == RTAS_UNKNOWN_SERVICE) - return -1; - - /* Gotta do something different here, use global lock for now... */ - spin_lock_irqsave(&rtas.lock, s); - rtas_args = &rtas.args; - - rtas_args->token = token; - rtas_args->nargs = nargs; - rtas_args->nret = nret; - rtas_args->rets = (rtas_arg_t *)&(rtas_args->args[nargs]); - va_start(list, outputs); - for (i = 0; i < nargs; ++i) { - rtas_args->args[i] = va_arg(list, rtas_arg_t); - PPCDBG(PPCDBG_RTAS, "\tnarg[%d] = 0x%x\n", i, rtas_args->args[i]); - } - va_end(list); - - for (i = 0; i < nret; ++i) - rtas_args->rets[i] = 0; - - PPCDBG(PPCDBG_RTAS, "\tentering rtas with 0x%lx\n", - __pa(rtas_args)); - enter_rtas(__pa(rtas_args)); - PPCDBG(PPCDBG_RTAS, "\treturned from rtas ...\n"); - - /* A -1 return code indicates that the last command couldn't - be completed due to a hardware error. */ - if (rtas_args->rets[0] == -1) - logit = (__fetch_rtas_last_error() == 0); - - ifppcdebug(PPCDBG_RTAS) { - for(i=0; i < nret ;i++) - udbg_printf("\tnret[%d] = 0x%lx\n", i, (ulong)rtas_args->rets[i]); - } - - if (nret > 1 && outputs != NULL) - for (i = 0; i < nret-1; ++i) - outputs[i] = rtas_args->rets[i+1]; - ret = (nret > 0)? rtas_args->rets[0]: 0; - - /* Log the error in the unlikely case that there was one. */ - if (unlikely(logit)) { - buff_copy = rtas_err_buf; - if (mem_init_done) { - buff_copy = kmalloc(RTAS_ERROR_LOG_MAX, GFP_ATOMIC); - if (buff_copy) - memcpy(buff_copy, rtas_err_buf, - RTAS_ERROR_LOG_MAX); - } - } - - /* Gotta do something different here, use global lock for now... */ - spin_unlock_irqrestore(&rtas.lock, s); - - if (buff_copy) { - log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0); - if (mem_init_done) - kfree(buff_copy); - } - return ret; -} - -/* Given an RTAS status code of 990n compute the hinted delay of 10^n - * (last digit) milliseconds. For now we bound at n=5 (100 sec). - */ -unsigned int -rtas_extended_busy_delay_time(int status) -{ - int order = status - 9900; - unsigned long ms; - - if (order < 0) - order = 0; /* RTC depends on this for -2 clock busy */ - else if (order > 5) - order = 5; /* bound */ - - /* Use microseconds for reasonable accuracy */ - for (ms=1; order > 0; order--) - ms *= 10; - - return ms; -} - -int rtas_error_rc(int rtas_rc) -{ - int rc; - - switch (rtas_rc) { - case -1: /* Hardware Error */ - rc = -EIO; - break; - case -3: /* Bad indicator/domain/etc */ - rc = -EINVAL; - break; - case -9000: /* Isolation error */ - rc = -EFAULT; - break; - case -9001: /* Outstanding TCE/PTE */ - rc = -EEXIST; - break; - case -9002: /* No usable slot */ - rc = -ENODEV; - break; - default: - printk(KERN_ERR "%s: unexpected RTAS error %d\n", - __FUNCTION__, rtas_rc); - rc = -ERANGE; - break; - } - return rc; -} - -int rtas_get_power_level(int powerdomain, int *level) -{ - int token = rtas_token("get-power-level"); - int rc; - - if (token == RTAS_UNKNOWN_SERVICE) - return -ENOENT; - - while ((rc = rtas_call(token, 1, 2, level, powerdomain)) == RTAS_BUSY) - udelay(1); - - if (rc < 0) - return rtas_error_rc(rc); - return rc; -} - -int rtas_set_power_level(int powerdomain, int level, int *setlevel) -{ - int token = rtas_token("set-power-level"); - unsigned int wait_time; - int rc; - - if (token == RTAS_UNKNOWN_SERVICE) - return -ENOENT; - - while (1) { - rc = rtas_call(token, 2, 2, setlevel, powerdomain, level); - if (rc == RTAS_BUSY) - udelay(1); - else if (rtas_is_extended_busy(rc)) { - wait_time = rtas_extended_busy_delay_time(rc); - udelay(wait_time * 1000); - } else - break; - } - - if (rc < 0) - return rtas_error_rc(rc); - return rc; -} - -int rtas_get_sensor(int sensor, int index, int *state) -{ - int token = rtas_token("get-sensor-state"); - unsigned int wait_time; - int rc; - - if (token == RTAS_UNKNOWN_SERVICE) - return -ENOENT; - - while (1) { - rc = rtas_call(token, 2, 2, state, sensor, index); - if (rc == RTAS_BUSY) - udelay(1); - else if (rtas_is_extended_busy(rc)) { - wait_time = rtas_extended_busy_delay_time(rc); - udelay(wait_time * 1000); - } else - break; - } - - if (rc < 0) - return rtas_error_rc(rc); - return rc; -} - -int rtas_set_indicator(int indicator, int index, int new_value) -{ - int token = rtas_token("set-indicator"); - unsigned int wait_time; - int rc; - - if (token == RTAS_UNKNOWN_SERVICE) - return -ENOENT; - - while (1) { - rc = rtas_call(token, 3, 1, NULL, indicator, index, new_value); - if (rc == RTAS_BUSY) - udelay(1); - else if (rtas_is_extended_busy(rc)) { - wait_time = rtas_extended_busy_delay_time(rc); - udelay(wait_time * 1000); - } - else - break; - } - - if (rc < 0) - return rtas_error_rc(rc); - return rc; -} - -#define FLASH_BLOCK_LIST_VERSION (1UL) -static void -rtas_flash_firmware(void) -{ - unsigned long image_size; - struct flash_block_list *f, *next, *flist; - unsigned long rtas_block_list; - int i, status, update_token; - - update_token = rtas_token("ibm,update-flash-64-and-reboot"); - if (update_token == RTAS_UNKNOWN_SERVICE) { - printk(KERN_ALERT "FLASH: ibm,update-flash-64-and-reboot is not available -- not a service partition?\n"); - printk(KERN_ALERT "FLASH: firmware will not be flashed\n"); - return; - } - - /* NOTE: the "first" block list is a global var with no data - * blocks in the kernel data segment. We do this because - * we want to ensure this block_list addr is under 4GB. - */ - rtas_firmware_flash_list.num_blocks = 0; - flist = (struct flash_block_list *)&rtas_firmware_flash_list; - rtas_block_list = virt_to_abs(flist); - if (rtas_block_list >= 4UL*1024*1024*1024) { - printk(KERN_ALERT "FLASH: kernel bug...flash list header addr above 4GB\n"); - return; - } - - printk(KERN_ALERT "FLASH: preparing saved firmware image for flash\n"); - /* Update the block_list in place. */ - image_size = 0; - for (f = flist; f; f = next) { - /* Translate data addrs to absolute */ - for (i = 0; i < f->num_blocks; i++) { - f->blocks[i].data = (char *)virt_to_abs(f->blocks[i].data); - image_size += f->blocks[i].length; - } - next = f->next; - /* Don't translate NULL pointer for last entry */ - if (f->next) - f->next = (struct flash_block_list *)virt_to_abs(f->next); - else - f->next = NULL; - /* make num_blocks into the version/length field */ - f->num_blocks = (FLASH_BLOCK_LIST_VERSION << 56) | ((f->num_blocks+1)*16); - } - - printk(KERN_ALERT "FLASH: flash image is %ld bytes\n", image_size); - printk(KERN_ALERT "FLASH: performing flash and reboot\n"); - rtas_progress("Flashing \n", 0x0); - rtas_progress("Please Wait... ", 0x0); - printk(KERN_ALERT "FLASH: this will take several minutes. Do not power off!\n"); - status = rtas_call(update_token, 1, 1, NULL, rtas_block_list); - switch (status) { /* should only get "bad" status */ - case 0: - printk(KERN_ALERT "FLASH: success\n"); - break; - case -1: - printk(KERN_ALERT "FLASH: hardware error. Firmware may not be not flashed\n"); - break; - case -3: - printk(KERN_ALERT "FLASH: image is corrupt or not correct for this platform. Firmware not flashed\n"); - break; - case -4: - printk(KERN_ALERT "FLASH: flash failed when partially complete. System may not reboot\n"); - break; - default: - printk(KERN_ALERT "FLASH: unknown flash return code %d\n", status); - break; - } -} - -void rtas_flash_bypass_warning(void) -{ - printk(KERN_ALERT "FLASH: firmware flash requires a reboot\n"); - printk(KERN_ALERT "FLASH: the firmware image will NOT be flashed\n"); -} - - -void -rtas_restart(char *cmd) -{ - if (rtas_firmware_flash_list.next) - rtas_flash_firmware(); - - printk("RTAS system-reboot returned %d\n", - rtas_call(rtas_token("system-reboot"), 0, 1, NULL)); - for (;;); -} - -void -rtas_power_off(void) -{ - if (rtas_firmware_flash_list.next) - rtas_flash_bypass_warning(); - /* allow power on only with power button press */ - printk("RTAS power-off returned %d\n", - rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1)); - for (;;); -} - -void -rtas_halt(void) -{ - if (rtas_firmware_flash_list.next) - rtas_flash_bypass_warning(); - rtas_power_off(); -} - -/* Must be in the RMO region, so we place it here */ -static char rtas_os_term_buf[2048]; - -void rtas_os_term(char *str) -{ - int status; - - if (RTAS_UNKNOWN_SERVICE == rtas_token("ibm,os-term")) - return; - - snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str); - - do { - status = rtas_call(rtas_token("ibm,os-term"), 1, 1, NULL, - __pa(rtas_os_term_buf)); - - if (status == RTAS_BUSY) - udelay(1); - else if (status != 0) - printk(KERN_EMERG "ibm,os-term call failed %d\n", - status); - } while (status == RTAS_BUSY); -} - - -asmlinkage int ppc_rtas(struct rtas_args __user *uargs) -{ - struct rtas_args args; - unsigned long flags; - char * buff_copy; - int nargs; - int err_rc = 0; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - if (copy_from_user(&args, uargs, 3 * sizeof(u32)) != 0) - return -EFAULT; - - nargs = args.nargs; - if (nargs > ARRAY_SIZE(args.args) - || args.nret > ARRAY_SIZE(args.args) - || nargs + args.nret > ARRAY_SIZE(args.args)) - return -EINVAL; - - /* Copy in args. */ - if (copy_from_user(args.args, uargs->args, - nargs * sizeof(rtas_arg_t)) != 0) - return -EFAULT; - - buff_copy = kmalloc(RTAS_ERROR_LOG_MAX, GFP_KERNEL); - - spin_lock_irqsave(&rtas.lock, flags); - - rtas.args = args; - enter_rtas(__pa(&rtas.args)); - args = rtas.args; - - args.rets = &args.args[nargs]; - - /* A -1 return code indicates that the last command couldn't - be completed due to a hardware error. */ - if (args.rets[0] == -1) { - err_rc = __fetch_rtas_last_error(); - if ((err_rc == 0) && buff_copy) { - memcpy(buff_copy, rtas_err_buf, RTAS_ERROR_LOG_MAX); - } - } - - spin_unlock_irqrestore(&rtas.lock, flags); - - if (buff_copy) { - if ((args.rets[0] == -1) && (err_rc == 0)) { - log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0); - } - kfree(buff_copy); - } - - /* Copy out args. */ - if (copy_to_user(uargs->args + nargs, - args.args + nargs, - args.nret * sizeof(rtas_arg_t)) != 0) - return -EFAULT; - - return 0; -} - -/* This version can't take the spinlock, because it never returns */ - -struct rtas_args rtas_stop_self_args = { - /* The token is initialized for real in setup_system() */ - .token = RTAS_UNKNOWN_SERVICE, - .nargs = 0, - .nret = 1, - .rets = &rtas_stop_self_args.args[0], -}; - -void rtas_stop_self(void) -{ - struct rtas_args *rtas_args = &rtas_stop_self_args; - - local_irq_disable(); - - BUG_ON(rtas_args->token == RTAS_UNKNOWN_SERVICE); - - printk("cpu %u (hwid %u) Ready to die...\n", - smp_processor_id(), hard_smp_processor_id()); - enter_rtas(__pa(rtas_args)); - - panic("Alas, I survived.\n"); -} - -/* - * Call early during boot, before mem init or bootmem, to retreive the RTAS - * informations from the device-tree and allocate the RMO buffer for userland - * accesses. - */ -void __init rtas_initialize(void) -{ - /* Get RTAS dev node and fill up our "rtas" structure with infos - * about it. - */ - rtas.dev = of_find_node_by_name(NULL, "rtas"); - if (rtas.dev) { - u32 *basep, *entryp; - u32 *sizep; - - basep = (u32 *)get_property(rtas.dev, "linux,rtas-base", NULL); - sizep = (u32 *)get_property(rtas.dev, "rtas-size", NULL); - if (basep != NULL && sizep != NULL) { - rtas.base = *basep; - rtas.size = *sizep; - entryp = (u32 *)get_property(rtas.dev, "linux,rtas-entry", NULL); - if (entryp == NULL) /* Ugh */ - rtas.entry = rtas.base; - else - rtas.entry = *entryp; - } else - rtas.dev = NULL; - } - /* If RTAS was found, allocate the RMO buffer for it and look for - * the stop-self token if any - */ - if (rtas.dev) { - unsigned long rtas_region = RTAS_INSTANTIATE_MAX; - if (systemcfg->platform == PLATFORM_PSERIES_LPAR) - rtas_region = min(lmb.rmo_size, RTAS_INSTANTIATE_MAX); - - rtas_rmo_buf = lmb_alloc_base(RTAS_RMOBUF_MAX, PAGE_SIZE, - rtas_region); - -#ifdef CONFIG_HOTPLUG_CPU - rtas_stop_self_args.token = rtas_token("stop-self"); -#endif /* CONFIG_HOTPLUG_CPU */ - } - -} - - -EXPORT_SYMBOL(rtas_firmware_flash_list); -EXPORT_SYMBOL(rtas_token); -EXPORT_SYMBOL(rtas_call); -EXPORT_SYMBOL(rtas_data_buf); -EXPORT_SYMBOL(rtas_data_buf_lock); -EXPORT_SYMBOL(rtas_extended_busy_delay_time); -EXPORT_SYMBOL(rtas_get_sensor); -EXPORT_SYMBOL(rtas_get_power_level); -EXPORT_SYMBOL(rtas_set_power_level); -EXPORT_SYMBOL(rtas_set_indicator); -EXPORT_SYMBOL(rtas_get_error_log_max); 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