1 files changed, 0 insertions, 358 deletions
diff --git a/arch/ppc64/kernel/machine_kexec.c b/arch/ppc64/kernel/machine_kexec.c
deleted file mode 100644
index 97c51e452be..00000000000
--- a/arch/ppc64/kernel/machine_kexec.c
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * machine_kexec.c - handle transition of Linux booting another kernel
- *
- * Copyright (C) 2004-2005, IBM Corp.
- *
- * Created by: Milton D Miller II
- *
- * This source code is licensed under the GNU General Public License,
- * Version 2.  See the file COPYING for more details.
- */
-
-
-#include <linux/cpumask.h>
-#include <linux/kexec.h>
-#include <linux/smp.h>
-#include <linux/thread_info.h>
-#include <linux/errno.h>
-
-#include <asm/page.h>
-#include <asm/current.h>
-#include <asm/machdep.h>
-#include <asm/cacheflush.h>
-#include <asm/paca.h>
-#include <asm/mmu.h>
-#include <asm/sections.h>	/* _end */
-#include <asm/prom.h>
-#include <asm/smp.h>
-
-#define HASH_GROUP_SIZE 0x80	/* size of each hash group, asm/mmu.h */
-
-/* Have this around till we move it into crash specific file */
-note_buf_t crash_notes[NR_CPUS];
-
-/* Dummy for now. Not sure if we need to have a crash shutdown in here
- * and if what it will achieve. Letting it be now to compile the code
- * in generic kexec environment
- */
-void machine_crash_shutdown(struct pt_regs *regs)
-{
-	/* do nothing right now */
-	/* smp_relase_cpus() if we want smp on panic kernel */
-	/* cpu_irq_down to isolate us until we are ready */
-}
-
-int machine_kexec_prepare(struct kimage *image)
-{
-	int i;
-	unsigned long begin, end;	/* limits of segment */
-	unsigned long low, high;	/* limits of blocked memory range */
-	struct device_node *node;
-	unsigned long *basep;
-	unsigned int *sizep;
-
-	if (!ppc_md.hpte_clear_all)
-		return -ENOENT;
-
-	/*
-	 * Since we use the kernel fault handlers and paging code to
-	 * handle the virtual mode, we must make sure no destination
-	 * overlaps kernel static data or bss.
-	 */
-	for (i = 0; i < image->nr_segments; i++)
-		if (image->segment[i].mem < __pa(_end))
-			return -ETXTBSY;
-
-	/*
-	 * For non-LPAR, we absolutely can not overwrite the mmu hash
-	 * table, since we are still using the bolted entries in it to
-	 * do the copy.  Check that here.
-	 *
-	 * It is safe if the end is below the start of the blocked
-	 * region (end <= low), or if the beginning is after the
-	 * end of the blocked region (begin >= high).  Use the
-	 * boolean identity !(a || b)  === (!a && !b).
-	 */
-	if (htab_address) {
-		low = __pa(htab_address);
-		high = low + (htab_hash_mask + 1) * HASH_GROUP_SIZE;
-
-		for (i = 0; i < image->nr_segments; i++) {
-			begin = image->segment[i].mem;
-			end = begin + image->segment[i].memsz;
-
-			if ((begin < high) && (end > low))
-				return -ETXTBSY;
-		}
-	}
-
-	/* We also should not overwrite the tce tables */
-	for (node = of_find_node_by_type(NULL, "pci"); node != NULL;
-			node = of_find_node_by_type(node, "pci")) {
-		basep = (unsigned long *)get_property(node, "linux,tce-base",
-							NULL);
-		sizep = (unsigned int *)get_property(node, "linux,tce-size",
-							NULL);
-		if (basep == NULL || sizep == NULL)
-			continue;
-
-		low = *basep;
-		high = low + (*sizep);
-
-		for (i = 0; i < image->nr_segments; i++) {
-			begin = image->segment[i].mem;
-			end = begin + image->segment[i].memsz;
-
-			if ((begin < high) && (end > low))
-				return -ETXTBSY;
-		}
-	}
-
-	return 0;
-}
-
-void machine_kexec_cleanup(struct kimage *image)
-{
-	/* we do nothing in prepare that needs to be undone */
-}
-
-#define IND_FLAGS (IND_DESTINATION | IND_INDIRECTION | IND_DONE | IND_SOURCE)
-
-static void copy_segments(unsigned long ind)
-{
-	unsigned long entry;
-	unsigned long *ptr;
-	void *dest;
-	void *addr;
-
-	/*
-	 * We rely on kexec_load to create a lists that properly
-	 * initializes these pointers before they are used.
-	 * We will still crash if the list is wrong, but at least
-	 * the compiler will be quiet.
-	 */
-	ptr = NULL;
-	dest = NULL;
-
-	for (entry = ind; !(entry & IND_DONE); entry = *ptr++) {
-		addr = __va(entry & PAGE_MASK);
-
-		switch (entry & IND_FLAGS) {
-		case IND_DESTINATION:
-			dest = addr;
-			break;
-		case IND_INDIRECTION:
-			ptr = addr;
-			break;
-		case IND_SOURCE:
-			copy_page(dest, addr);
-			dest += PAGE_SIZE;
-		}
-	}
-}
-
-void kexec_copy_flush(struct kimage *image)
-{
-	long i, nr_segments = image->nr_segments;
-	struct  kexec_segment ranges[KEXEC_SEGMENT_MAX];
-
-	/* save the ranges on the stack to efficiently flush the icache */
-	memcpy(ranges, image->segment, sizeof(ranges));
-
-	/*
-	 * After this call we may not use anything allocated in dynamic
-	 * memory, including *image.
-	 *
-	 * Only globals and the stack are allowed.
-	 */
-	copy_segments(image->head);
-
-	/*
-	 * we need to clear the icache for all dest pages sometime,
-	 * including ones that were in place on the original copy
-	 */
-	for (i = 0; i < nr_segments; i++)
-		flush_icache_range(ranges[i].mem + KERNELBASE,
-				ranges[i].mem + KERNELBASE +
-				ranges[i].memsz);
-}
-
-#ifdef CONFIG_SMP
-
-/* FIXME: we should schedule this function to be called on all cpus based
- * on calling the interrupts, but we would like to call it off irq level
- * so that the interrupt controller is clean.
- */
-void kexec_smp_down(void *arg)
-{
-	if (ppc_md.kexec_cpu_down)
-		ppc_md.kexec_cpu_down(0, 1);
-
-	local_irq_disable();
-	kexec_smp_wait();
-	/* NOTREACHED */
-}
-
-static void kexec_prepare_cpus(void)
-{
-	int my_cpu, i, notified=-1;
-
-	smp_call_function(kexec_smp_down, NULL, 0, /* wait */0);
-	my_cpu = get_cpu();
-
-	/* check the others cpus are now down (via paca hw cpu id == -1) */
-	for (i=0; i < NR_CPUS; i++) {
-		if (i == my_cpu)
-			continue;
-
-		while (paca[i].hw_cpu_id != -1) {
-			barrier();
-			if (!cpu_possible(i)) {
-				printk("kexec: cpu %d hw_cpu_id %d is not"
-						" possible, ignoring\n",
-						i, paca[i].hw_cpu_id);
-				break;
-			}
-			if (!cpu_online(i)) {
-				/* Fixme: this can be spinning in
-				 * pSeries_secondary_wait with a paca
-				 * waiting for it to go online.
-				 */
-				printk("kexec: cpu %d hw_cpu_id %d is not"
-						" online, ignoring\n",
-						i, paca[i].hw_cpu_id);
-				break;
-			}
-			if (i != notified) {
-				printk( "kexec: waiting for cpu %d (physical"
-						" %d) to go down\n",
-						i, paca[i].hw_cpu_id);
-				notified = i;
-			}
-		}
-	}
-
-	/* after we tell the others to go down */
-	if (ppc_md.kexec_cpu_down)
-		ppc_md.kexec_cpu_down(0, 0);
-
-	put_cpu();
-
-	local_irq_disable();
-}
-
-#else /* ! SMP */
-
-static void kexec_prepare_cpus(void)
-{
-	/*
-	 * move the secondarys to us so that we can copy
-	 * the new kernel 0-0x100 safely
-	 *
-	 * do this if kexec in setup.c ?
-	 *
-	 * We need to release the cpus if we are ever going from an
-	 * UP to an SMP kernel.
-	 */
-	smp_release_cpus();
-	if (ppc_md.kexec_cpu_down)
-		ppc_md.kexec_cpu_down(0, 0);
-	local_irq_disable();
-}
-
-#endif /* SMP */
-
-/*
- * kexec thread structure and stack.
- *
- * We need to make sure that this is 16384-byte aligned due to the
- * way process stacks are handled.  It also must be statically allocated
- * or allocated as part of the kimage, because everything else may be
- * overwritten when we copy the kexec image.  We piggyback on the
- * "init_task" linker section here to statically allocate a stack.
- *
- * We could use a smaller stack if we don't care about anything using
- * current, but that audit has not been performed.
- */
-union thread_union kexec_stack
-	__attribute__((__section__(".data.init_task"))) = { };
-
-/* Our assembly helper, in kexec_stub.S */
-extern NORET_TYPE void kexec_sequence(void *newstack, unsigned long start,
-					void *image, void *control,
-					void (*clear_all)(void)) ATTRIB_NORET;
-
-/* too late to fail here */
-void machine_kexec(struct kimage *image)
-{
-
-	/* prepare control code if any */
-
-	/* shutdown other cpus into our wait loop and quiesce interrupts */
-	kexec_prepare_cpus();
-
-	/* switch to a staticly allocated stack.  Based on irq stack code.
-	 * XXX: the task struct will likely be invalid once we do the copy!
-	 */
-	kexec_stack.thread_info.task = current_thread_info()->task;
-	kexec_stack.thread_info.flags = 0;
-
-	/* Some things are best done in assembly.  Finding globals with
-	 * a toc is easier in C, so pass in what we can.
-	 */
-	kexec_sequence(&kexec_stack, image->start, image,
-			page_address(image->control_code_page),
-			ppc_md.hpte_clear_all);
-	/* NOTREACHED */
-}
-
-/* Values we need to export to the second kernel via the device tree. */
-static unsigned long htab_base, htab_size, kernel_end;
-
-static struct property htab_base_prop = {
-	.name = "linux,htab-base",
-	.length = sizeof(unsigned long),
-	.value = (unsigned char *)&htab_base,
-};
-
-static struct property htab_size_prop = {
-	.name = "linux,htab-size",
-	.length = sizeof(unsigned long),
-	.value = (unsigned char *)&htab_size,
-};
-
-static struct property kernel_end_prop = {
-	.name = "linux,kernel-end",
-	.length = sizeof(unsigned long),
-	.value = (unsigned char *)&kernel_end,
-};
-
-static void __init export_htab_values(void)
-{
-	struct device_node *node;
-
-	node = of_find_node_by_path("/chosen");
-	if (!node)
-		return;
-
-	kernel_end = __pa(_end);
-	prom_add_property(node, &kernel_end_prop);
-
-	/* On machines with no htab htab_address is NULL */
-	if (NULL == htab_address)
-		goto out;
-
-	htab_base = __pa(htab_address);
-	prom_add_property(node, &htab_base_prop);
-
-	htab_size = 1UL << ppc64_pft_size;
-	prom_add_property(node, &htab_size_prop);
-
- out:
-	of_node_put(node);
-}
-
-void __init kexec_setup(void)
-{
-	export_htab_values();
-}