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Diffstat (limited to 'arch/powerpc/kernel/machine_kexec_32.c')
-rw-r--r--arch/powerpc/kernel/machine_kexec_32.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/machine_kexec_32.c b/arch/powerpc/kernel/machine_kexec_32.c
new file mode 100644
index 00000000000..443606134df
--- /dev/null
+++ b/arch/powerpc/kernel/machine_kexec_32.c
@@ -0,0 +1,65 @@
+/*
+ * PPC32 code to handle Linux booting another kernel.
+ *
+ * Copyright (C) 2002-2003 Eric Biederman <ebiederm@xmission.com>
+ * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz
+ * Copyright (C) 2005 IBM Corporation.
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+#include <linux/kexec.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <asm/cacheflush.h>
+#include <asm/hw_irq.h>
+#include <asm/io.h>
+
+typedef NORET_TYPE void (*relocate_new_kernel_t)(
+ unsigned long indirection_page,
+ unsigned long reboot_code_buffer,
+ unsigned long start_address) ATTRIB_NORET;
+
+/*
+ * This is a generic machine_kexec function suitable at least for
+ * non-OpenFirmware embedded platforms.
+ * It merely copies the image relocation code to the control page and
+ * jumps to it.
+ * A platform specific function may just call this one.
+ */
+void default_machine_kexec(struct kimage *image)
+{
+ const extern unsigned char relocate_new_kernel[];
+ const extern unsigned int relocate_new_kernel_size;
+ unsigned long page_list;
+ unsigned long reboot_code_buffer, reboot_code_buffer_phys;
+ relocate_new_kernel_t rnk;
+
+ /* Interrupts aren't acceptable while we reboot */
+ local_irq_disable();
+
+ page_list = image->head;
+
+ /* we need both effective and real address here */
+ reboot_code_buffer =
+ (unsigned long)page_address(image->control_code_page);
+ reboot_code_buffer_phys = virt_to_phys((void *)reboot_code_buffer);
+
+ /* copy our kernel relocation code to the control code page */
+ memcpy((void *)reboot_code_buffer, relocate_new_kernel,
+ relocate_new_kernel_size);
+
+ flush_icache_range(reboot_code_buffer,
+ reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
+ printk(KERN_INFO "Bye!\n");
+
+ /* now call it */
+ rnk = (relocate_new_kernel_t) reboot_code_buffer;
+ (*rnk)(page_list, reboot_code_buffer_phys, image->start);
+}
+
+int default_machine_kexec_prepare(struct kimage *image)
+{
+ return 0;
+}