diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/crash_dump.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/lib/code-patching.c | 33 | ||||
| -rw-r--r-- | arch/powerpc/platforms/86xx/mpc86xx_smp.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/smp.c | 1 |
5 files changed, 38 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/crash_dump.c b/arch/powerpc/kernel/crash_dump.c index 9ee3c5278db0..35b9a668b0e1 100644 --- a/arch/powerpc/kernel/crash_dump.c +++ b/arch/powerpc/kernel/crash_dump.c @@ -14,6 +14,7 @@ #include <linux/crash_dump.h> #include <linux/bootmem.h> #include <linux/lmb.h> +#include <asm/code-patching.h> #include <asm/kdump.h> #include <asm/prom.h> #include <asm/firmware.h> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index e522b06cc42f..e7f7042b9f61 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -24,3 +24,5 @@ obj-$(CONFIG_SMP) += locks.o endif obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o + +obj-y += code-patching.o diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c new file mode 100644 index 000000000000..7afae88ed1d4 --- /dev/null +++ b/arch/powerpc/lib/code-patching.c @@ -0,0 +1,33 @@ +/* + * Copyright 2008 Michael Ellerman, IBM Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <asm/code-patching.h> + + +void create_instruction(unsigned long 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)); +} + +void create_branch(unsigned long addr, unsigned long target, int flags) +{ + unsigned int instruction; + + if (! (flags & BRANCH_ABSOLUTE)) + target = target - 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); +} diff --git a/arch/powerpc/platforms/86xx/mpc86xx_smp.c b/arch/powerpc/platforms/86xx/mpc86xx_smp.c index ba55b0ff0f74..63f55853cd69 100644 --- a/arch/powerpc/platforms/86xx/mpc86xx_smp.c +++ b/arch/powerpc/platforms/86xx/mpc86xx_smp.c @@ -15,6 +15,7 @@ #include <linux/init.h> #include <linux/delay.h> +#include <asm/code-patching.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/pci-bridge.h> diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c index cb2d894541c6..bf202f7eadf8 100644 --- a/arch/powerpc/platforms/powermac/smp.c +++ b/arch/powerpc/platforms/powermac/smp.c @@ -36,6 +36,7 @@ #include <asm/ptrace.h> #include <asm/atomic.h> +#include <asm/code-patching.h> #include <asm/irq.h> #include <asm/page.h> #include <asm/pgtable.h> |