Initial import

1 files changed, 69 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/sections.h b/arch/powerpc/include/asm/sections.h
new file mode 100644
index 000000000..a5e930aca
--- /dev/null
+++ b/arch/powerpc/include/asm/sections.h
@@ -0,0 +1,69 @@
+#ifndef _ASM_POWERPC_SECTIONS_H
+#define _ASM_POWERPC_SECTIONS_H
+#ifdef __KERNEL__
+
+#include <linux/elf.h>
+#include <linux/uaccess.h>
+#include <asm-generic/sections.h>
+
+#ifdef __powerpc64__
+
+extern char __start_interrupts[];
+extern char __end_interrupts[];
+
+extern char __prom_init_toc_start[];
+extern char __prom_init_toc_end[];
+
+static inline int in_kernel_text(unsigned long addr)
+{
+	if (addr >= (unsigned long)_stext && addr < (unsigned long)__init_end)
+		return 1;
+
+	return 0;
+}
+
+static inline int overlaps_interrupt_vector_text(unsigned long start,
+							unsigned long end)
+{
+	unsigned long real_start, real_end;
+	real_start = __start_interrupts - _stext;
+	real_end = __end_interrupts - _stext;
+
+	return start < (unsigned long)__va(real_end) &&
+		(unsigned long)__va(real_start) < end;
+}
+
+static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
+{
+	return start < (unsigned long)__init_end &&
+		(unsigned long)_stext < end;
+}
+
+static inline int overlaps_kvm_tmp(unsigned long start, unsigned long end)
+{
+#ifdef CONFIG_KVM_GUEST
+	extern char kvm_tmp[];
+	return start < (unsigned long)kvm_tmp &&
+		(unsigned long)&kvm_tmp[1024 * 1024] < end;
+#else
+	return 0;
+#endif
+}
+
+#if !defined(_CALL_ELF) || _CALL_ELF != 2
+#undef dereference_function_descriptor
+static inline void *dereference_function_descriptor(void *ptr)
+{
+	struct ppc64_opd_entry *desc = ptr;
+	void *p;
+
+	if (!probe_kernel_address(&desc->funcaddr, p))
+		ptr = p;
+	return ptr;
+}
+#endif
+
+#endif
+
+#endif /* __KERNEL__ */
+#endif	/* _ASM_POWERPC_SECTIONS_H */