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-rw-r--r--arch/powerpc/mm/hash_utils_64.c32
1 files changed, 31 insertions, 1 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index a83dfa3cf40..2b5a399f6fa 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -31,6 +31,7 @@
#include <linux/cache.h>
#include <linux/init.h>
#include <linux/signal.h>
+#include <linux/lmb.h>
#include <asm/processor.h>
#include <asm/pgtable.h>
@@ -41,7 +42,7 @@
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/machdep.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
#include <asm/abs_addr.h>
#include <asm/tlbflush.h>
#include <asm/io.h>
@@ -191,6 +192,29 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
return ret < 0 ? ret : 0;
}
+#ifdef CONFIG_MEMORY_HOTPLUG
+static int htab_remove_mapping(unsigned long vstart, unsigned long vend,
+ int psize, int ssize)
+{
+ unsigned long vaddr;
+ unsigned int step, shift;
+
+ shift = mmu_psize_defs[psize].shift;
+ step = 1 << shift;
+
+ if (!ppc_md.hpte_removebolted) {
+ printk(KERN_WARNING "Platform doesn't implement "
+ "hpte_removebolted\n");
+ return -EINVAL;
+ }
+
+ for (vaddr = vstart; vaddr < vend; vaddr += step)
+ ppc_md.hpte_removebolted(vaddr, psize, ssize);
+
+ return 0;
+}
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
static int __init htab_dt_scan_seg_sizes(unsigned long node,
const char *uname, int depth,
void *data)
@@ -434,6 +458,12 @@ void create_section_mapping(unsigned long start, unsigned long end)
_PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_COHERENT | PP_RWXX,
mmu_linear_psize, mmu_kernel_ssize));
}
+
+int remove_section_mapping(unsigned long start, unsigned long end)
+{
+ return htab_remove_mapping(start, end, mmu_linear_psize,
+ mmu_kernel_ssize);
+}
#endif /* CONFIG_MEMORY_HOTPLUG */
static inline void make_bl(unsigned int *insn_addr, void *func)