diff options
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 32 |
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) |