summaryrefslogtreecommitdiffstats
path: root/arch/arm/include/asm/cp15.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-06 00:57:04 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-06 00:57:04 +0200
commiteb3d3ec567e868c8a3bfbfdfc9465ffd52983d11 (patch)
tree75acf38b8d73cd281e5ce4dcc941faf48e244b98 /arch/arm/include/asm/cp15.h
parentMerge branch 'arm64-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kern... (diff)
parentMerge branch 'devel-stable' into for-next (diff)
downloadlinux-eb3d3ec567e868c8a3bfbfdfc9465ffd52983d11.tar.xz
linux-eb3d3ec567e868c8a3bfbfdfc9465ffd52983d11.zip
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into next
Pull ARM updates from Russell King: - Major clean-up of the L2 cache support code. The existing mess was becoming rather unmaintainable through all the additions that others have done over time. This turns it into a much nicer structure, and implements a few performance improvements as well. - Clean up some of the CP15 control register tweaks for alignment support, moving some code and data into alignment.c - DMA properties for ARM, from Santosh and reviewed by DT people. This adds DT properties to specify bus translations we can't discover automatically, and to indicate whether devices are coherent. - Hibernation support for ARM - Make ftrace work with read-only text in modules - add suspend support for PJ4B CPUs - rework interrupt masking for undefined instruction handling, which allows us to enable interrupts earlier in the handling of these exceptions. - support for big endian page tables - fix stacktrace support to exclude stacktrace functions from the trace, and add save_stack_trace_regs() implementation so that kprobes can record stack traces. - Add support for the Cortex-A17 CPU. - Remove last vestiges of ARM710 support. - Removal of ARM "meminfo" structure, finally converting us solely to memblock to handle the early memory initialisation. * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (142 commits) ARM: ensure C page table setup code follows assembly code (part II) ARM: ensure C page table setup code follows assembly code ARM: consolidate last remaining open-coded alignment trap enable ARM: remove global cr_no_alignment ARM: remove CPU_CP15 conditional from alignment.c ARM: remove unused adjust_cr() function ARM: move "noalign" command line option to alignment.c ARM: provide common method to clear bits in CPU control register ARM: 8025/1: Get rid of meminfo ARM: 8060/1: mm: allow sub-architectures to override PCI I/O memory type ARM: 8066/1: correction for ARM patch 8031/2 ARM: 8049/1: ftrace/add save_stack_trace_regs() implementation ARM: 8065/1: remove last use of CONFIG_CPU_ARM710 ARM: 8062/1: Modify ldrt fixup handler to re-execute the userspace instruction ARM: 8047/1: rwsem: use asm-generic rwsem implementation ARM: l2c: trial at enabling some Cortex-A9 optimisations ARM: l2c: add warnings for stuff modifying aux_ctrl register values ARM: l2c: print a warning with L2C-310 caches if the cache size is modified ARM: l2c: remove old .set_debug method ARM: l2c: kill L2X0_AUX_CTRL_MASK before anyone else makes use of this ...
Diffstat (limited to 'arch/arm/include/asm/cp15.h')
-rw-r--r--arch/arm/include/asm/cp15.h25
1 files changed, 12 insertions, 13 deletions
diff --git a/arch/arm/include/asm/cp15.h b/arch/arm/include/asm/cp15.h
index 6493802f880a..c3f11524f10c 100644
--- a/arch/arm/include/asm/cp15.h
+++ b/arch/arm/include/asm/cp15.h
@@ -42,24 +42,23 @@
#ifndef __ASSEMBLY__
#if __LINUX_ARM_ARCH__ >= 4
-#define vectors_high() (cr_alignment & CR_V)
+#define vectors_high() (get_cr() & CR_V)
#else
#define vectors_high() (0)
#endif
#ifdef CONFIG_CPU_CP15
-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)
+static inline unsigned long get_cr(void)
{
- unsigned int val;
+ unsigned long val;
asm("mrc p15, 0, %0, c1, c0, 0 @ get CR" : "=r" (val) : : "cc");
return val;
}
-static inline void set_cr(unsigned int val)
+static inline void set_cr(unsigned long val)
{
asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR"
: : "r" (val) : "cc");
@@ -80,10 +79,6 @@ static inline void set_auxcr(unsigned int val)
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))
@@ -106,13 +101,17 @@ static inline void set_copro_access(unsigned int val)
#else /* ifdef CONFIG_CPU_CP15 */
/*
- * cr_alignment and cr_no_alignment are tightly coupled to cp15 (at least in the
- * minds of the developers). Yielding 0 for machines without a cp15 (and making
- * it read-only) is fine for most cases and saves quite some #ifdeffery.
+ * cr_alignment is tightly coupled to cp15 (at least in the minds of the
+ * developers). Yielding 0 for machines without a cp15 (and making it
+ * read-only) is fine for most cases and saves quite some #ifdeffery.
*/
-#define cr_no_alignment UL(0)
#define cr_alignment UL(0)
+static inline unsigned long get_cr(void)
+{
+ return 0;
+}
+
#endif /* ifdef CONFIG_CPU_CP15 / else */
#endif /* ifndef __ASSEMBLY__ */