powerpc/book3s/32: Use patch_site to patch hash functions

Use patch_sites and the new modify_instruction_site() function
instead of hardcoding hash functions patching.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 10 insertions, 25 deletions

diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index 3c7c73defcb6..cc4b81331167 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -31,6 +31,7 @@
 #include <asm/prom.h>
 #include <asm/mmu.h>
 #include <asm/machdep.h>
+#include <asm/code-patching.h>
 
 #include "mmu_decl.h"
 
@@ -182,10 +183,6 @@ void __init MMU_init_hw(void)
 	unsigned int hmask, mb, mb2;
 	unsigned int n_hpteg, lg_n_hpteg;
 
-	extern unsigned int hash_page_patch_A[];
-	extern unsigned int hash_page_patch_B[], hash_page_patch_C[];
-	extern unsigned int flush_hash_patch_A[], flush_hash_patch_B[];
-
 	if (!mmu_has_feature(MMU_FTR_HPTE_TABLE))
 		return;
 
@@ -234,31 +231,19 @@ void __init MMU_init_hw(void)
 	if (lg_n_hpteg > 16)
 		mb2 = 16 - LG_HPTEG_SIZE;
 
-	hash_page_patch_A[0] = (hash_page_patch_A[0] & ~0xffff)
-		| ((unsigned int)(Hash) >> 16);
-	hash_page_patch_A[1] = (hash_page_patch_A[1] & ~0x7c0) | (mb << 6);
-	hash_page_patch_A[2] = (hash_page_patch_A[2] & ~0x7c0) | (mb2 << 6);
-	hash_page_patch_B[0] = (hash_page_patch_B[0] & ~0xffff) | hmask;
-	hash_page_patch_C[0] = (hash_page_patch_C[0] & ~0xffff) | hmask;
-
-	/*
-	 * Ensure that the locations we've patched have been written
-	 * out from the data cache and invalidated in the instruction
-	 * cache, on those machines with split caches.
-	 */
-	flush_icache_range((unsigned long) &hash_page_patch_A[0],
-			   (unsigned long) &hash_page_patch_C[1]);
+	modify_instruction_site(&patch__hash_page_A0, 0xffff, (unsigned int)Hash >> 16);
+	modify_instruction_site(&patch__hash_page_A1, 0x7c0, mb << 6);
+	modify_instruction_site(&patch__hash_page_A2, 0x7c0, mb2 << 6);
+	modify_instruction_site(&patch__hash_page_B, 0xffff, hmask);
+	modify_instruction_site(&patch__hash_page_C, 0xffff, hmask);
 
 	/*
 	 * Patch up the instructions in hashtable.S:flush_hash_page
 	 */
-	flush_hash_patch_A[0] = (flush_hash_patch_A[0] & ~0xffff)
-		| ((unsigned int)(Hash) >> 16);
-	flush_hash_patch_A[1] = (flush_hash_patch_A[1] & ~0x7c0) | (mb << 6);
-	flush_hash_patch_A[2] = (flush_hash_patch_A[2] & ~0x7c0) | (mb2 << 6);
-	flush_hash_patch_B[0] = (flush_hash_patch_B[0] & ~0xffff) | hmask;
-	flush_icache_range((unsigned long) &flush_hash_patch_A[0],
-			   (unsigned long) &flush_hash_patch_B[1]);
+	modify_instruction_site(&patch__flush_hash_A0, 0xffff, (unsigned int)Hash >> 16);
+	modify_instruction_site(&patch__flush_hash_A1, 0x7c0, mb << 6);
+	modify_instruction_site(&patch__flush_hash_A2, 0x7c0, mb2 << 6);
+	modify_instruction_site(&patch__flush_hash_B, 0xffff, hmask);
 
 	if ( ppc_md.progress ) ppc_md.progress("hash:done", 0x205);
 }