---

yaml --- r: 101714 b: refs/heads/master c: e7a5727 h: refs/heads/master v: v3
git-mirror · Jul 1, 2008 · c103755 · c103755
1 parent 13dd31d
commit c103755
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Showing 6 changed files with 25 additions and 19 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: aaddd3eacaeaef3503035750b3f21ac2bfe97cbf
+refs/heads/master: e7a57273c6407bb6903fbaddec8c2119bf318617
diff --git a/trunk/arch/powerpc/kernel/crash_dump.c b/trunk/arch/powerpc/kernel/crash_dump.c
@@ -34,6 +34,8 @@ void __init reserve_kdump_trampoline(void)
 
 static void __init create_trampoline(unsigned long addr)
 {
+	unsigned int *p = (unsigned int *)addr;
+
 	/* The maximum range of a single instruction branch, is the current
 	 * instruction's address + (32 MB - 4) bytes. For the trampoline we
 	 * need to branch to current address + 32 MB. So we insert a nop at
@@ -42,8 +44,8 @@ static void __init create_trampoline(unsigned long addr)
 	 * branch to "addr" we jump to ("addr" + 32 MB). Although it requires
 	 * two instructions it doesn't require any registers.
 	 */
-	create_instruction(addr, 0x60000000); /* nop */
-	create_branch(addr + 4, addr + PHYSICAL_START, 0);
+	patch_instruction(p, 0x60000000); /* nop */
+	patch_branch(++p, addr + PHYSICAL_START, 0);
 }
 
 void __init setup_kdump_trampoline(void)

diff --git a/trunk/arch/powerpc/lib/code-patching.c b/trunk/arch/powerpc/lib/code-patching.c
@@ -11,23 +11,27 @@
 #include <asm/code-patching.h>
 
 
-void create_instruction(unsigned long addr, unsigned int instr)
+void patch_instruction(unsigned int *addr, unsigned int instr)
 {
-	unsigned int *p;
-	p  = (unsigned int *)addr;
-	*p = instr;
-	asm ("dcbst 0, %0; sync; icbi 0,%0; sync; isync" : : "r" (p));
+	*addr = instr;
+	asm ("dcbst 0, %0; sync; icbi 0,%0; sync; isync" : : "r" (addr));
 }
 
-void create_branch(unsigned long addr, unsigned long target, int flags)
+void patch_branch(unsigned int *addr, unsigned long target, int flags)
+{
+	patch_instruction(addr, create_branch(addr, target, flags));
+}
+
+unsigned int create_branch(const unsigned int *addr,
+			   unsigned long target, int flags)
 {
 	unsigned int instruction;
 
 	if (! (flags & BRANCH_ABSOLUTE))
-		target = target - addr;
+		target = target - (unsigned long)addr;
 
 	/* Mask out the flags and target, so they don't step on each other. */
 	instruction = 0x48000000 | (flags & 0x3) | (target & 0x03FFFFFC);
 
-	create_instruction(addr, instruction);
+	return instruction;
 }
diff --git a/trunk/arch/powerpc/platforms/86xx/mpc86xx_smp.c b/trunk/arch/powerpc/platforms/86xx/mpc86xx_smp.c
@@ -57,8 +57,7 @@ smp_86xx_kick_cpu(int nr)
 	unsigned int save_vector;
 	unsigned long target, flags;
 	int n = 0;
-	volatile unsigned int *vector
-		 = (volatile unsigned int *)(KERNELBASE + 0x100);
+	unsigned int *vector = (unsigned int *)(KERNELBASE + 0x100);
 
 	if (nr < 0 || nr >= NR_CPUS)
 		return;
@@ -72,7 +71,7 @@ smp_86xx_kick_cpu(int nr)
 
 	/* Setup fake reset vector to call __secondary_start_mpc86xx. */
 	target = (unsigned long) __secondary_start_mpc86xx;
-	create_branch((unsigned long)vector, target, BRANCH_SET_LINK);
+	patch_branch(vector, target, BRANCH_SET_LINK);
 
 	/* Kick that CPU */
 	smp_86xx_release_core(nr);

diff --git a/trunk/arch/powerpc/platforms/powermac/smp.c b/trunk/arch/powerpc/platforms/powermac/smp.c
@@ -787,8 +787,7 @@ static void __devinit smp_core99_kick_cpu(int nr)
 {
 	unsigned int save_vector;
 	unsigned long target, flags;
-	volatile unsigned int *vector
-		 = ((volatile unsigned int *)(KERNELBASE+0x100));
+	unsigned int *vector = (unsigned int *)(KERNELBASE+0x100);
 
 	if (nr < 0 || nr > 3)
 		return;
@@ -805,7 +804,7 @@ static void __devinit smp_core99_kick_cpu(int nr)
 	 *   b __secondary_start_pmac_0 + nr*8 - KERNELBASE
 	 */
 	target = (unsigned long) __secondary_start_pmac_0 + nr * 8;
-	create_branch((unsigned long)vector, target, BRANCH_SET_LINK);
+	patch_branch(vector, target, BRANCH_SET_LINK);
 
 	/* Put some life in our friend */
 	pmac_call_feature(PMAC_FTR_RESET_CPU, NULL, nr, 0);

diff --git a/trunk/include/asm-powerpc/code-patching.h b/trunk/include/asm-powerpc/code-patching.h
@@ -19,7 +19,9 @@
 #define BRANCH_SET_LINK	0x1
 #define BRANCH_ABSOLUTE	0x2
 
-extern void create_branch(unsigned long addr, unsigned long target, int flags);
-extern void create_instruction(unsigned long addr, unsigned int instr);
+unsigned int create_branch(const unsigned int *addr,
+			   unsigned long target, int flags);
+void patch_branch(unsigned int *addr, unsigned long target, int flags);
+void patch_instruction(unsigned int *addr, unsigned int instr);
 
 #endif /* _ASM_POWERPC_CODE_PATCHING_H */