1 files changed, 120 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
new file mode 100644
index 00000000..8a33698c
--- /dev/null
+++ b/arch/powerpc/include/asm/kexec.h
@@ -0,0 +1,120 @@
+#ifndef _ASM_POWERPC_KEXEC_H
+#define _ASM_POWERPC_KEXEC_H
+#ifdef __KERNEL__
+
+#ifdef CONFIG_FSL_BOOKE
+
+/*
+ * On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory
+ * and therefore we can only deal with memory within this range
+ */
+#define KEXEC_SOURCE_MEMORY_LIMIT	(2 * 1024 * 1024 * 1024UL - 1)
+#define KEXEC_DESTINATION_MEMORY_LIMIT	(2 * 1024 * 1024 * 1024UL - 1)
+#define KEXEC_CONTROL_MEMORY_LIMIT	(2 * 1024 * 1024 * 1024UL - 1)
+
+#else
+
+/*
+ * Maximum page that is mapped directly into kernel memory.
+ * XXX: Since we copy virt we can use any page we allocate
+ */
+#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
+
+/*
+ * Maximum address we can reach in physical address mode.
+ * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
+ */
+#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
+
+/* Maximum address we can use for the control code buffer */
+#ifdef __powerpc64__
+#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
+#else
+/* TASK_SIZE, probably left over from use_mm ?? */
+#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
+#endif
+#endif
+
+#define KEXEC_CONTROL_PAGE_SIZE 4096
+
+/* The native architecture */
+#ifdef __powerpc64__
+#define KEXEC_ARCH KEXEC_ARCH_PPC64
+#else
+#define KEXEC_ARCH KEXEC_ARCH_PPC
+#endif
+
+#define KEXEC_STATE_NONE 0
+#define KEXEC_STATE_IRQS_OFF 1
+#define KEXEC_STATE_REAL_MODE 2
+
+#ifndef __ASSEMBLY__
+#include <linux/cpumask.h>
+#include <asm/reg.h>
+
+typedef void (*crash_shutdown_t)(void);
+
+#ifdef CONFIG_KEXEC
+
+/*
+ * This function is responsible for capturing register states if coming
+ * via panic or invoking dump using sysrq-trigger.
+ */
+static inline void crash_setup_regs(struct pt_regs *newregs,
+					struct pt_regs *oldregs)
+{
+	if (oldregs)
+		memcpy(newregs, oldregs, sizeof(*newregs));
+	else
+		ppc_save_regs(newregs);
+}
+
+extern void kexec_smp_wait(void);	/* get and clear naca physid, wait for
+					  master to copy new code to 0 */
+extern int crashing_cpu;
+extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
+extern cpumask_t cpus_in_sr;
+static inline int kexec_sr_activated(int cpu)
+{
+	return cpumask_test_cpu(cpu, &cpus_in_sr);
+}
+
+struct kimage;
+struct pt_regs;
+extern void default_machine_kexec(struct kimage *image);
+extern int default_machine_kexec_prepare(struct kimage *image);
+extern void default_machine_crash_shutdown(struct pt_regs *regs);
+extern int crash_shutdown_register(crash_shutdown_t handler);
+extern int crash_shutdown_unregister(crash_shutdown_t handler);
+
+extern void machine_kexec_simple(struct kimage *image);
+extern void crash_kexec_secondary(struct pt_regs *regs);
+extern int overlaps_crashkernel(unsigned long start, unsigned long size);
+extern void reserve_crashkernel(void);
+extern void machine_kexec_mask_interrupts(void);
+
+#else /* !CONFIG_KEXEC */
+static inline int kexec_sr_activated(int cpu) { return 0; }
+static inline void crash_kexec_secondary(struct pt_regs *regs) { }
+
+static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
+{
+	return 0;
+}
+
+static inline void reserve_crashkernel(void) { ; }
+
+static inline int crash_shutdown_register(crash_shutdown_t handler)
+{
+	return 0;
+}
+
+static inline int crash_shutdown_unregister(crash_shutdown_t handler)
+{
+	return 0;
+}
+
+#endif /* CONFIG_KEXEC */
+#endif /* ! __ASSEMBLY__ */
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_KEXEC_H */