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-rw-r--r--arch/arm/Kconfig5
-rw-r--r--arch/arm/Kconfig.debug16
-rw-r--r--arch/arm/Makefile1
-rw-r--r--arch/arm/boot/compressed/.gitignore2
-rw-r--r--arch/arm/boot/compressed/Makefile15
-rw-r--r--arch/arm/boot/compressed/decompress.c6
-rw-r--r--arch/arm/boot/compressed/piggy.xzkern.S6
-rw-r--r--arch/arm/common/gic.c13
-rw-r--r--arch/arm/configs/integrator_defconfig8
-rw-r--r--arch/arm/include/asm/cp15.h87
-rw-r--r--arch/arm/include/asm/elf.h4
-rw-r--r--arch/arm/include/asm/jump_label.h41
-rw-r--r--arch/arm/include/asm/memory.h2
-rw-r--r--arch/arm/include/asm/mmu_context.h29
-rw-r--r--arch/arm/include/asm/opcodes.h59
-rw-r--r--arch/arm/include/asm/page.h2
-rw-r--r--arch/arm/include/asm/perf_event.h1
-rw-r--r--arch/arm/include/asm/processor.h1
-rw-r--r--arch/arm/include/asm/prom.h2
-rw-r--r--arch/arm/include/asm/system.h77
-rw-r--r--arch/arm/include/asm/tlbflush.h136
-rw-r--r--arch/arm/include/asm/traps.h2
-rw-r--r--arch/arm/kernel/Makefile9
-rw-r--r--arch/arm/kernel/debug.S25
-rw-r--r--arch/arm/kernel/fiq.c2
-rw-r--r--arch/arm/kernel/ftrace.c100
-rw-r--r--arch/arm/kernel/head-nommu.S2
-rw-r--r--arch/arm/kernel/head.S10
-rw-r--r--arch/arm/kernel/insn.c61
-rw-r--r--arch/arm/kernel/insn.h29
-rw-r--r--arch/arm/kernel/irq.c5
-rw-r--r--arch/arm/kernel/jump_label.c39
-rw-r--r--arch/arm/kernel/kprobes.c86
-rw-r--r--arch/arm/kernel/machine_kexec.c25
-rw-r--r--arch/arm/kernel/patch.c75
-rw-r--r--arch/arm/kernel/patch.h7
-rw-r--r--arch/arm/kernel/perf_event.c3
-rw-r--r--arch/arm/kernel/perf_event_v7.c145
-rw-r--r--arch/arm/kernel/process.c38
-rw-r--r--arch/arm/kernel/sched_clock.c18
-rw-r--r--arch/arm/kernel/setup.c3
-rw-r--r--arch/arm/kernel/signal.c24
-rw-r--r--arch/arm/kernel/smp.c17
-rw-r--r--arch/arm/kernel/traps.c19
-rw-r--r--arch/arm/mach-exynos/hotplug.c1
-rw-r--r--arch/arm/mach-integrator/Kconfig1
-rw-r--r--arch/arm/mach-integrator/core.c3
-rw-r--r--arch/arm/mach-integrator/include/mach/irqs.h3
-rw-r--r--arch/arm/mach-integrator/integrator_ap.c10
-rw-r--r--arch/arm/mach-integrator/integrator_cp.c3
-rw-r--r--arch/arm/mach-integrator/pci.c3
-rw-r--r--arch/arm/mach-integrator/pci_v3.c3
-rw-r--r--arch/arm/mach-realview/hotplug.c1
-rw-r--r--arch/arm/mach-tegra/hotplug.c1
-rw-r--r--arch/arm/mach-vexpress/hotplug.c2
-rw-r--r--arch/arm/mach-vexpress/include/mach/io.h1
-rw-r--r--arch/arm/mm/alignment.c2
-rw-r--r--arch/arm/mm/cache-feroceon-l2.c1
-rw-r--r--arch/arm/mm/cache-tauros2.c1
-rw-r--r--arch/arm/mm/cache-xsc3l2.c2
-rw-r--r--arch/arm/mm/copypage-v4mc.c9
-rw-r--r--arch/arm/mm/copypage-v6.c20
-rw-r--r--arch/arm/mm/copypage-xscale.c9
-rw-r--r--arch/arm/mm/dma-mapping.c20
-rw-r--r--arch/arm/mm/fault.c3
-rw-r--r--arch/arm/mm/flush.c14
-rw-r--r--arch/arm/mm/highmem.c21
-rw-r--r--arch/arm/mm/init.c4
-rw-r--r--arch/arm/mm/ioremap.c1
-rw-r--r--arch/arm/mm/mm.h26
-rw-r--r--arch/arm/mm/mmu.c8
-rw-r--r--arch/arm/mm/pgd.c1
-rw-r--r--arch/arm/mm/vmregion.c76
-rw-r--r--arch/arm/mm/vmregion.h5
-rw-r--r--arch/arm/net/Makefile3
-rw-r--r--arch/arm/net/bpf_jit_32.c915
-rw-r--r--arch/arm/net/bpf_jit_32.h190
-rw-r--r--arch/arm/plat-versatile/Kconfig2
-rw-r--r--arch/arm/vfp/vfpmodule.c1
79 files changed, 2151 insertions, 472 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 24626b0419e..be8f634f001 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -9,6 +9,7 @@ config ARM
select SYS_SUPPORTS_APM_EMULATION
select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
+ select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
select HAVE_ARCH_KGDB
select HAVE_KPROBES if !XIP_KERNEL
select HAVE_KRETPROBES if (HAVE_KPROBES)
@@ -21,6 +22,7 @@ config ARM
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_LZO
select HAVE_KERNEL_LZMA
+ select HAVE_KERNEL_XZ
select HAVE_IRQ_WORK
select HAVE_PERF_EVENTS
select PERF_USE_VMALLOC
@@ -32,6 +34,7 @@ config ARM
select GENERIC_IRQ_SHOW
select CPU_PM if (SUSPEND || CPU_IDLE)
select GENERIC_PCI_IOMAP
+ select HAVE_BPF_JIT if NET
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and
@@ -266,6 +269,7 @@ config ARCH_INTEGRATOR
select PLAT_VERSATILE
select PLAT_VERSATILE_FPGA_IRQ
select NEED_MACH_MEMORY_H
+ select SPARSE_IRQ
help
Support for ARM's Integrator platform.
@@ -312,6 +316,7 @@ config ARCH_VEXPRESS
select HAVE_CLK
select HAVE_PATA_PLATFORM
select ICST
+ select NO_IOPORT
select PLAT_VERSATILE
select PLAT_VERSATILE_CLCD
help
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index e0d236d7ff7..755d9fbe323 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -100,6 +100,22 @@ choice
Note that the system will appear to hang during boot if there
is nothing connected to read from the DCC.
+ config DEBUG_SEMIHOSTING
+ bool "Kernel low-level debug output via semihosting I"
+ help
+ Semihosting enables code running on an ARM target to use
+ the I/O facilities on a host debugger/emulator through a
+ simple SVC calls. The host debugger or emulator must have
+ semihosting enabled for the special svc call to be trapped
+ otherwise the kernel will crash.
+
+ This is known to work with OpenOCD, as wellas
+ ARM's Fast Models, or any other controlling environment
+ that implements semihosting.
+
+ For more details about semihosting, please see
+ chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
+
config AT91_DEBUG_LL_DBGU0
bool "Kernel low-level debugging on rm9200, 9260/9g20, 9261/9g10 and 9rl"
depends on HAVE_AT91_DBGU0
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 40319d91bb7..93d63be8fa5 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -253,6 +253,7 @@ core-$(CONFIG_VFP) += arch/arm/vfp/
# If we have a machine-specific directory, then include it in the build.
core-y += arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
+core-y += arch/arm/net/
core-y += $(machdirs) $(platdirs)
drivers-$(CONFIG_OPROFILE) += arch/arm/oprofile/
diff --git a/arch/arm/boot/compressed/.gitignore b/arch/arm/boot/compressed/.gitignore
index e0936a14851..d0d441c429a 100644
--- a/arch/arm/boot/compressed/.gitignore
+++ b/arch/arm/boot/compressed/.gitignore
@@ -1,8 +1,10 @@
+ashldi3.S
font.c
lib1funcs.S
piggy.gzip
piggy.lzo
piggy.lzma
+piggy.xzkern
vmlinux
vmlinux.lds
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index cf0a64ce4b8..bb267562e7e 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -92,6 +92,7 @@ SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
suffix_$(CONFIG_KERNEL_GZIP) = gzip
suffix_$(CONFIG_KERNEL_LZO) = lzo
suffix_$(CONFIG_KERNEL_LZMA) = lzma
+suffix_$(CONFIG_KERNEL_XZ) = xzkern
# Borrowed libfdt files for the ATAG compatibility mode
@@ -112,10 +113,12 @@ endif
targets := vmlinux vmlinux.lds \
piggy.$(suffix_y) piggy.$(suffix_y).o \
- lib1funcs.o lib1funcs.S font.o font.c head.o misc.o $(OBJS)
+ lib1funcs.o lib1funcs.S ashldi3.o ashldi3.S \
+ font.o font.c head.o misc.o $(OBJS)
# Make sure files are removed during clean
-extra-y += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S $(libfdt) $(libfdt_hdrs)
+extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern \
+ lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs)
ifeq ($(CONFIG_FUNCTION_TRACER),y)
ORIG_CFLAGS := $(KBUILD_CFLAGS)
@@ -151,6 +154,12 @@ lib1funcs = $(obj)/lib1funcs.o
$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
$(call cmd,shipped)
+# For __aeabi_llsl
+ashldi3 = $(obj)/ashldi3.o
+
+$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S
+ $(call cmd,shipped)
+
# We need to prevent any GOTOFF relocs being used with references
# to symbols in the .bss section since we cannot relocate them
# independently from the rest at run time. This can be achieved by
@@ -172,7 +181,7 @@ if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \
fi
$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
- $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
+ $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) FORCE
@$(check_for_multiple_zreladdr)
$(call if_changed,ld)
@$(check_for_bad_syms)
diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c
index 07be5a2f830..f41b38cafce 100644
--- a/arch/arm/boot/compressed/decompress.c
+++ b/arch/arm/boot/compressed/decompress.c
@@ -44,6 +44,12 @@ extern void error(char *);
#include "../../../../lib/decompress_unlzma.c"
#endif
+#ifdef CONFIG_KERNEL_XZ
+#define memmove memmove
+#define memcpy memcpy
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
{
return decompress(input, len, NULL, NULL, output, NULL, error);
diff --git a/arch/arm/boot/compressed/piggy.xzkern.S b/arch/arm/boot/compressed/piggy.xzkern.S
new file mode 100644
index 00000000000..5703f300d02
--- /dev/null
+++ b/arch/arm/boot/compressed/piggy.xzkern.S
@@ -0,0 +1,6 @@
+ .section .piggydata,#alloc
+ .globl input_data
+input_data:
+ .incbin "arch/arm/boot/compressed/piggy.xzkern"
+ .globl input_data_end
+input_data_end:
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index b2dc2dd7f1d..a3bc86fa315 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -697,13 +697,12 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
* For primary GICs, skip over SGIs.
* For secondary GICs, skip over PPIs, too.
*/
- domain->hwirq_base = 32;
- if (gic_nr == 0) {
- if ((irq_start & 31) > 0) {
- domain->hwirq_base = 16;
- if (irq_start != -1)
- irq_start = (irq_start & ~31) + 16;
- }
+ if (gic_nr == 0 && (irq_start & 31) > 0) {
+ domain->hwirq_base = 16;
+ if (irq_start != -1)
+ irq_start = (irq_start & ~31) + 16;
+ } else {
+ domain->hwirq_base = 32;
}
/*
diff --git a/arch/arm/configs/integrator_defconfig b/arch/arm/configs/integrator_defconfig
index 1103f62a196..a8314c3ee84 100644
--- a/arch/arm/configs/integrator_defconfig
+++ b/arch/arm/configs/integrator_defconfig
@@ -57,18 +57,24 @@ CONFIG_NETDEVICES=y
CONFIG_NET_ETHERNET=y
CONFIG_NET_PCI=y
CONFIG_E100=y
+CONFIG_SMC91X=y
# CONFIG_KEYBOARD_ATKBD is not set
# CONFIG_SERIO_SERPORT is not set
CONFIG_SERIAL_AMBA_PL010=y
CONFIG_SERIAL_AMBA_PL010_CONSOLE=y
CONFIG_FB=y
CONFIG_FB_MODE_HELPERS=y
+CONFIG_FB_ARMCLCD=y
CONFIG_FB_MATROX=y
CONFIG_FB_MATROX_MILLENIUM=y
CONFIG_FB_MATROX_MYSTIQUE=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_MMC=y
+CONFIG_MMC_ARMMMCI=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_PL030=y
CONFIG_EXT2_FS=y
+CONFIG_VFAT_FS=y
CONFIG_TMPFS=y
CONFIG_JFFS2_FS=y
CONFIG_CRAMFS=y
@@ -78,5 +84,7 @@ CONFIG_ROOT_NFS=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
CONFIG_PARTITION_ADVANCED=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_KERNEL=y
diff --git a/arch/arm/include/asm/cp15.h b/arch/arm/include/asm/cp15.h
new file mode 100644
index 00000000000..3dabd8dd404
--- /dev/null
+++ b/arch/arm/include/asm/cp15.h
@@ -0,0 +1,87 @@
+#ifndef __ASM_ARM_CP15_H
+#define __ASM_ARM_CP15_H
+
+#include <asm/system.h>
+
+/*
+ * CR1 bits (CP#15 CR1)
+ */
+#define CR_M (1 << 0) /* MMU enable */
+#define CR_A (1 << 1) /* Alignment abort enable */
+#define CR_C (1 << 2) /* Dcache enable */
+#define CR_W (1 << 3) /* Write buffer enable */
+#define CR_P (1 << 4) /* 32-bit exception handler */
+#define CR_D (1 << 5) /* 32-bit data address range */
+#define CR_L (1 << 6) /* Implementation defined */
+#define CR_B (1 << 7) /* Big endian */
+#define CR_S (1 << 8) /* System MMU protection */
+#define CR_R (1 << 9) /* ROM MMU protection */
+#define CR_F (1 << 10) /* Implementation defined */
+#define CR_Z (1 << 11) /* Implementation defined */
+#define CR_I (1 << 12) /* Icache enable */
+#define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */
+#define CR_RR (1 << 14) /* Round Robin cache replacement */
+#define CR_L4 (1 << 15) /* LDR pc can set T bit */
+#define CR_DT (1 << 16)
+#define CR_IT (1 << 18)
+#define CR_ST (1 << 19)
+#define CR_FI (1 << 21) /* Fast interrupt (lower latency mode) */
+#define CR_U (1 << 22) /* Unaligned access operation */
+#define CR_XP (1 << 23) /* Extended page tables */
+#define CR_VE (1 << 24) /* Vectored interrupts */
+#define CR_EE (1 << 25) /* Exception (Big) Endian */
+#define CR_TRE (1 << 28) /* TEX remap enable */
+#define CR_AFE (1 << 29) /* Access flag enable */
+#define CR_TE (1 << 30) /* Thumb exception enable */
+
+#ifndef __ASSEMBLY__
+
+#if __LINUX_ARM_ARCH__ >= 4
+#define vectors_high() (cr_alignment & CR_V)
+#else
+#define vectors_high() (0)
+#endif
+
+extern unsigned long cr_no_alignment; /* defined in entry-armv.S */
+extern unsigned long cr_alignment; /* defined in entry-armv.S */
+
+static inline unsigned int get_cr(void)
+{
+ unsigned int val;
+ asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
+ return val;
+}
+
+static inline void set_cr(unsigned int val)
+{
+ asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR"
+ : : "r" (val) : "cc");
+ isb();
+}
+
+#ifndef CONFIG_SMP
+extern void adjust_cr(unsigned long mask, unsigned long set);
+#endif
+
+#define CPACC_FULL(n) (3 << (n * 2))
+#define CPACC_SVC(n) (1 << (n * 2))
+#define CPACC_DISABLE(n) (0 << (n * 2))
+
+static inline unsigned int get_copro_access(void)
+{
+ unsigned int val;
+ asm("mrc p15, 0, %0, c1, c0, 2 @ get copro access"
+ : "=r" (val) : : "cc");
+ return val;
+}
+
+static inline void set_copro_access(unsigned int val)
+{
+ asm volatile("mcr p15, 0, %0, c1, c0, 2 @ set copro access"
+ : : "r" (val) : "cc");
+ isb();
+}
+
+#endif
+
+#endif
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
index 0e9ce8d9686..38050b1c480 100644
--- a/arch/arm/include/asm/elf.h
+++ b/arch/arm/include/asm/elf.h
@@ -130,8 +130,4 @@ struct mm_struct;
extern unsigned long arch_randomize_brk(struct mm_struct *mm);
#define arch_randomize_brk arch_randomize_brk
-extern int vectors_user_mapping(void);
-#define arch_setup_additional_pages(bprm, uses_interp) vectors_user_mapping()
-#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
-
#endif
diff --git a/arch/arm/include/asm/jump_label.h b/arch/arm/include/asm/jump_label.h
new file mode 100644
index 00000000000..5c5ca2ea62b
--- /dev/null
+++ b/arch/arm/include/asm/jump_label.h
@@ -0,0 +1,41 @@
+#ifndef _ASM_ARM_JUMP_LABEL_H
+#define _ASM_ARM_JUMP_LABEL_H
+
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <asm/system.h>
+
+#define JUMP_LABEL_NOP_SIZE 4
+
+#ifdef CONFIG_THUMB2_KERNEL
+#define JUMP_LABEL_NOP "nop.w"
+#else
+#define JUMP_LABEL_NOP "nop"
+#endif
+
+static __always_inline bool arch_static_branch(struct jump_label_key *key)
+{
+ asm goto("1:\n\t"
+ JUMP_LABEL_NOP "\n\t"
+ ".pushsection __jump_table, \"aw\"\n\t"
+ ".word 1b, %l[l_yes], %c0\n\t"
+ ".popsection\n\t"
+ : : "i" (key) : : l_yes);
+
+ return false;
+l_yes:
+ return true;
+}
+
+#endif /* __KERNEL__ */
+
+typedef u32 jump_label_t;
+
+struct jump_entry {
+ jump_label_t code;
+ jump_label_t target;
+ jump_label_t key;
+};
+
+#endif
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index a8997d71084..fcb575747e5 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -116,6 +116,8 @@
#define MODULES_END (END_MEM)
#define MODULES_VADDR (PHYS_OFFSET)
+#define XIP_VIRT_ADDR(physaddr) (physaddr)
+
#endif /* !CONFIG_MMU */
/*
diff --git a/arch/arm/include/asm/mmu_context.h b/arch/arm/include/asm/mmu_context.h
index 71605d9f8e4..a0b3cac0547 100644
--- a/arch/arm/include/asm/mmu_context.h
+++ b/arch/arm/include/asm/mmu_context.h
@@ -18,6 +18,7 @@
#include <asm/cacheflush.h>
#include <asm/cachetype.h>
#include <asm/proc-fns.h>
+#include <asm-generic/mm_hooks.h>
void __check_kvm_seq(struct mm_struct *mm);
@@ -133,32 +134,4 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
#define deactivate_mm(tsk,mm) do { } while (0)
#define activate_mm(prev,next) switch_mm(prev, next, NULL)
-/*
- * We are inserting a "fake" vma for the user-accessible vector page so
- * gdb and friends can get to it through ptrace and /proc/<pid>/mem.
- * But we also want to remove it before the generic code gets to see it
- * during process exit or the unmapping of it would cause total havoc.
- * (the macro is used as remove_vma() is static to mm/mmap.c)
- */
-#define arch_exit_mmap(mm) \
-do { \
- struct vm_area_struct *high_vma = find_vma(mm, 0xffff0000); \
- if (high_vma) { \
- BUG_ON(high_vma->vm_next); /* it should be last */ \
- if (high_vma->vm_prev) \
- high_vma->vm_prev->vm_next = NULL; \
- else \
- mm->mmap = NULL; \
- rb_erase(&high_vma->vm_rb, &mm->mm_rb); \
- mm->mmap_cache = NULL; \
- mm->map_count--; \
- remove_vma(high_vma); \
- } \
-} while (0)
-
-static inline void arch_dup_mmap(struct mm_struct *oldmm,
- struct mm_struct *mm)
-{
-}
-
#endif
diff --git a/arch/arm/include/asm/opcodes.h b/arch/arm/include/asm/opcodes.h
index c0efdd60966..19c48deda70 100644
--- a/arch/arm/include/asm/opcodes.h
+++ b/arch/arm/include/asm/opcodes.h
@@ -17,4 +17,63 @@ extern asmlinkage unsigned int arm_check_condition(u32 opcode, u32 psr);
#define ARM_OPCODE_CONDTEST_PASS 1
#define ARM_OPCODE_CONDTEST_UNCOND 2
+
+/*
+ * Opcode byteswap helpers
+ *
+ * These macros help with converting instructions between a canonical integer
+ * format and in-memory representation, in an endianness-agnostic manner.
+ *
+ * __mem_to_opcode_*() convert from in-memory representation to canonical form.
+ * __opcode_to_mem_*() convert from canonical form to