powerpc: Merge rtas.c into arch/powerpc/kernel

This splits arch/ppc64/kernel/rtas.c into arch/powerpc/kernel/rtas.c,
which contains generic RTAS functions useful on any CHRP platform,
and arch/powerpc/platforms/pseries/rtas-fw.[ch], which contain
some pSeries-specific firmware flashing bits.  The parts of rtas.c
that are to do with pSeries-specific error logging are protected
by a new CONFIG_RTAS_ERROR_LOGGING symbol.  The inclusion of rtas.o
is controlled by the CONFIG_PPC_RTAS symbol, and the relevant
platforms select that.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 775 deletions

diff --git a/arch/ppc64/kernel/rtas.c b/arch/ppc64/kernel/rtas.c
deleted file mode 100644
index 36adab591bd3..000000000000
--- 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);