[PATCH] powerpc: Move ras.c into arch/powerpc/platforms/pseries

ras.o is only built for CONFIG_PPC_PSERIES, so move it into
arch/powerpc/platforms/pseries. Update Makefiles to suit.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 1 insertions, 354 deletions

diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index ce5c99db431f..cb6ac3d1a06f 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -29,7 +29,7 @@ ifneq ($(CONFIG_PPC_MERGE),y)
 obj-$(CONFIG_PPC_MULTIPLATFORM) += prom_init.o
 endif
 
-obj-$(CONFIG_PPC_PSERIES) += rtasd.o ras.o udbg_16550.o
+obj-$(CONFIG_PPC_PSERIES) += rtasd.o udbg_16550.o
 
 obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_iommu.o bpa_nvram.o \
 			 bpa_iic.o spider-pic.o
diff --git a/arch/ppc64/kernel/ras.c b/arch/ppc64/kernel/ras.c
deleted file mode 100644
index 41b97dc9cc0a..000000000000
--- a/arch/ppc64/kernel/ras.c
+++ /dev/null
@@ -1,353 +0,0 @@
-/*
- * ras.c
- * Copyright (C) 2001 Dave Engebretsen IBM Corporation
- * 
- * 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.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- */
-
-/* Change Activity:
- * 2001/09/21 : engebret : Created with minimal EPOW and HW exception support.
- * End Change Activity 
- */
-
-#include <linux/errno.h>
-#include <linux/threads.h>
-#include <linux/kernel_stat.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/timex.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/pci.h>
-#include <linux/delay.h>
-#include <linux/irq.h>
-#include <linux/random.h>
-#include <linux/sysrq.h>
-#include <linux/bitops.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/irq.h>
-#include <asm/cache.h>
-#include <asm/prom.h>
-#include <asm/ptrace.h>
-#include <asm/machdep.h>
-#include <asm/rtas.h>
-#include <asm/ppcdebug.h>
-
-static unsigned char ras_log_buf[RTAS_ERROR_LOG_MAX];
-static DEFINE_SPINLOCK(ras_log_buf_lock);
-
-char mce_data_buf[RTAS_ERROR_LOG_MAX]
-;
-/* This is true if we are using the firmware NMI handler (typically LPAR) */
-extern int fwnmi_active;
-
-static int ras_get_sensor_state_token;
-static int ras_check_exception_token;
-
-#define EPOW_SENSOR_TOKEN	9
-#define EPOW_SENSOR_INDEX	0
-#define RAS_VECTOR_OFFSET	0x500
-
-static irqreturn_t ras_epow_interrupt(int irq, void *dev_id,
-					struct pt_regs * regs);
-static irqreturn_t ras_error_interrupt(int irq, void *dev_id,
-					struct pt_regs * regs);
-
-/* #define DEBUG */
-
-static void request_ras_irqs(struct device_node *np, char *propname,
-			irqreturn_t (*handler)(int, void *, struct pt_regs *),
-			const char *name)
-{
-	unsigned int *ireg, len, i;
-	int virq, n_intr;
-
-	ireg = (unsigned int *)get_property(np, propname, &len);
-	if (ireg == NULL)
-		return;
-	n_intr = prom_n_intr_cells(np);
-	len /= n_intr * sizeof(*ireg);
-
-	for (i = 0; i < len; i++) {
-		virq = virt_irq_create_mapping(*ireg);
-		if (virq == NO_IRQ) {
-			printk(KERN_ERR "Unable to allocate interrupt "
-			       "number for %s\n", np->full_name);
-			return;
-		}
-		if (request_irq(irq_offset_up(virq), handler, 0, name, NULL)) {
-			printk(KERN_ERR "Unable to request interrupt %d for "
-			       "%s\n", irq_offset_up(virq), np->full_name);
-			return;
-		}
-		ireg += n_intr;
-	}
-}
-
-/*
- * Initialize handlers for the set of interrupts caused by hardware errors
- * and power system events.
- */
-static int __init init_ras_IRQ(void)
-{
-	struct device_node *np;
-
-	ras_get_sensor_state_token = rtas_token("get-sensor-state");
-	ras_check_exception_token = rtas_token("check-exception");
-
-	/* Internal Errors */
-	np = of_find_node_by_path("/event-sources/internal-errors");
-	if (np != NULL) {
-		request_ras_irqs(np, "open-pic-interrupt", ras_error_interrupt,
-				 "RAS_ERROR");
-		request_ras_irqs(np, "interrupts", ras_error_interrupt,
-				 "RAS_ERROR");
-		of_node_put(np);
-	}
-
-	/* EPOW Events */
-	np = of_find_node_by_path("/event-sources/epow-events");
-	if (np != NULL) {
-		request_ras_irqs(np, "open-pic-interrupt", ras_epow_interrupt,
-				 "RAS_EPOW");
-		request_ras_irqs(np, "interrupts", ras_epow_interrupt,
-				 "RAS_EPOW");
-		of_node_put(np);
-	}
-
-	return 1;
-}
-__initcall(init_ras_IRQ);
-
-/*
- * Handle power subsystem events (EPOW).
- *
- * Presently we just log the event has occurred.  This should be fixed
- * to examine the type of power failure and take appropriate action where
- * the time horizon permits something useful to be done.
- */
-static irqreturn_t
-ras_epow_interrupt(int irq, void *dev_id, struct pt_regs * regs)
-{
-	int status = 0xdeadbeef;
-	int state = 0;
-	int critical;
-
-	status = rtas_call(ras_get_sensor_state_token, 2, 2, &state,
-			   EPOW_SENSOR_TOKEN, EPOW_SENSOR_INDEX);
-
-	if (state > 3)
-		critical = 1;  /* Time Critical */
-	else
-		critical = 0;
-
-	spin_lock(&ras_log_buf_lock);
-
-	status = rtas_call(ras_check_exception_token, 6, 1, NULL,
-			   RAS_VECTOR_OFFSET,
-			   virt_irq_to_real(irq_offset_down(irq)),
-			   RTAS_EPOW_WARNING | RTAS_POWERMGM_EVENTS,
-			   critical, __pa(&ras_log_buf),
-				rtas_get_error_log_max());
-
-	udbg_printf("EPOW <0x%lx 0x%x 0x%x>\n",
-		    *((unsigned long *)&ras_log_buf), status, state);
-	printk(KERN_WARNING "EPOW <0x%lx 0x%x 0x%x>\n",
-	       *((unsigned long *)&ras_log_buf), status, state);
-
-	/* format and print the extended information */
-	log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, 0);
-
-	spin_unlock(&ras_log_buf_lock);
-	return IRQ_HANDLED;
-}
-
-/*
- * Handle hardware error interrupts.
- *
- * RTAS check-exception is called to collect data on the exception.  If
- * the error is deemed recoverable, we log a warning and return.
- * For nonrecoverable errors, an error is logged and we stop all processing
- * as quickly as possible in order to prevent propagation of the failure.
- */
-static irqreturn_t
-ras_error_interrupt(int irq, void *dev_id, struct pt_regs * regs)
-{
-	struct rtas_error_log *rtas_elog;
-	int status = 0xdeadbeef;
-	int fatal;
-
-	spin_lock(&ras_log_buf_lock);
-
-	status = rtas_call(ras_check_exception_token, 6, 1, NULL,
-			   RAS_VECTOR_OFFSET,
-			   virt_irq_to_real(irq_offset_down(irq)),
-			   RTAS_INTERNAL_ERROR, 1 /*Time Critical */,
-			   __pa(&ras_log_buf),
-				rtas_get_error_log_max());
-
-	rtas_elog = (struct rtas_error_log *)ras_log_buf;
-
-	if ((status == 0) && (rtas_elog->severity >= RTAS_SEVERITY_ERROR_SYNC))
-		fatal = 1;
-	else
-		fatal = 0;
-
-	/* format and print the extended information */
-	log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, fatal);
-
-	if (fatal) {
-		udbg_printf("Fatal HW Error <0x%lx 0x%x>\n",
-			    *((unsigned long *)&ras_log_buf), status);
-		printk(KERN_EMERG "Error: Fatal hardware error <0x%lx 0x%x>\n",
-		       *((unsigned long *)&ras_log_buf), status);
-
-#ifndef DEBUG
-		/* Don't actually power off when debugging so we can test
-		 * without actually failing while injecting errors.
-		 * Error data will not be logged to syslog.
-		 */
-		ppc_md.power_off();
-#endif
-	} else {
-		udbg_printf("Recoverable HW Error <0x%lx 0x%x>\n",
-			    *((unsigned long *)&ras_log_buf), status);
-		printk(KERN_WARNING
-		       "Warning: Recoverable hardware error <0x%lx 0x%x>\n",
-		       *((unsigned long *)&ras_log_buf), status);
-	}
-
-	spin_unlock(&ras_log_buf_lock);
-	return IRQ_HANDLED;
-}
-
-/* Get the error information for errors coming through the
- * FWNMI vectors.  The pt_regs' r3 will be updated to reflect
- * the actual r3 if possible, and a ptr to the error log entry
- * will be returned if found.
- *
- * The mce_data_buf does not have any locks or protection around it,
- * if a second machine check comes in, or a system reset is done
- * before we have logged the error, then we will get corruption in the
- * error log.  This is preferable over holding off on calling
- * ibm,nmi-interlock which would result in us checkstopping if a
- * second machine check did come in.
- */
-static struct rtas_error_log *fwnmi_get_errinfo(struct pt_regs *regs)
-{
-	unsigned long errdata = regs->gpr[3];
-	struct rtas_error_log *errhdr = NULL;
-	unsigned long *savep;
-
-	if ((errdata >= 0x7000 && errdata < 0x7fff0) ||
-	    (errdata >= rtas.base && errdata < rtas.base + rtas.size - 16)) {
-		savep = __va(errdata);
-		regs->gpr[3] = savep[0];	/* restore original r3 */
-		memset(mce_data_buf, 0, RTAS_ERROR_LOG_MAX);
-		memcpy(mce_data_buf, (char *)(savep + 1), RTAS_ERROR_LOG_MAX);
-		errhdr = (struct rtas_error_log *)mce_data_buf;
-	} else {
-		printk("FWNMI: corrupt r3\n");
-	}
-	return errhdr;
-}
-
-/* Call this when done with the data returned by FWNMI_get_errinfo.
- * It will release the saved data area for other CPUs in the
- * partition to receive FWNMI errors.
- */
-static void fwnmi_release_errinfo(void)
-{
-	int ret = rtas_call(rtas_token("ibm,nmi-interlock"), 0, 1, NULL);
-	if (ret != 0)
-		printk("FWNMI: nmi-interlock failed: %d\n", ret);
-}
-
-void pSeries_system_reset_exception(struct pt_regs *regs)
-{
-	if (fwnmi_active) {
-		struct rtas_error_log *errhdr = fwnmi_get_errinfo(regs);
-		if (errhdr) {
-			/* XXX Should look at FWNMI information */
-		}
-		fwnmi_release_errinfo();
-	}
-}
-
-/*
- * See if we can recover from a machine check exception.
- * This is only called on power4 (or above) and only via
- * the Firmware Non-Maskable Interrupts (fwnmi) handler
- * which provides the error analysis for us.
- *
- * Return 1 if corrected (or delivered a signal).
- * Return 0 if there is nothing we can do.
- */
-static int recover_mce(struct pt_regs *regs, struct rtas_error_log * err)
-{
-	int nonfatal = 0;
-
-	if (err->disposition == RTAS_DISP_FULLY_RECOVERED) {
-		/* Platform corrected itself */
-		nonfatal = 1;
-	} else if ((regs->msr & MSR_RI) &&
-		   user_mode(regs) &&
-		   err->severity == RTAS_SEVERITY_ERROR_SYNC &&
-		   err->disposition == RTAS_DISP_NOT_RECOVERED &&
-		   err->target == RTAS_TARGET_MEMORY &&
-		   err->type == RTAS_TYPE_ECC_UNCORR &&
-		   !(current->pid == 0 || current->pid == 1)) {
-		/* Kill off a user process with an ECC error */
-		printk(KERN_ERR "MCE: uncorrectable ecc error for pid %d\n",
-		       current->pid);
-		/* XXX something better for ECC error? */
-		_exception(SIGBUS, regs, BUS_ADRERR, regs->nip);
-		nonfatal = 1;
-	}
-
- 	log_error((char *)err, ERR_TYPE_RTAS_LOG, !nonfatal);
-
-	return nonfatal;
-}
-
-/*
- * Handle a machine check.
- *
- * Note that on Power 4 and beyond Firmware Non-Maskable Interrupts (fwnmi)
- * should be present.  If so the handler which called us tells us if the
- * error was recovered (never true if RI=0).
- *
- * On hardware prior to Power 4 these exceptions were asynchronous which
- * means we can't tell exactly where it occurred and so we can't recover.
- */
-int pSeries_machine_check_exception(struct pt_regs *regs)
-{
-	struct rtas_error_log *errp;
-
-	if (fwnmi_active) {
-		errp = fwnmi_get_errinfo(regs);
-		fwnmi_release_errinfo();
-		if (errp && recover_mce(regs, errp))
-			return 1;
-	}
-
-	return 0;
-}