This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / kernel / machine_kexec_32.c

diff --git a/arch/powerpc/kernel/machine_kexec_32.c b/arch/powerpc/kernel/machine_kexec_32.c
new file mode 100644 (file)
index 0000000..4436061
--- /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;
+}