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ARC updates for 4.7-rc3 

- Revert of ll-sc backoff retry workaround in atomics/spinlocks as hardware
   is now proven to work just fine
 
 - Typo fixes (Thanks Andrea Gelmini)
 
 - Removal of obsolete DT property (Alexey)
 
 - Other minor fixes
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Merge tag 'arc-4.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:

 - Revert of ll-sc backoff retry workaround in atomics/spinlocks as
   hardware is now proven to work just fine

 - Typo fixes (Thanks Andrea Gelmini)

 - Removal of obsolete DT property (Alexey)

 - Other minor fixes

* tag 'arc-4.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  Revert "ARCv2: spinlock/rwlock/atomics: Delayed retry of failed SCOND with exponential backoff"
  Revert "ARCv2: spinlock/rwlock: Reset retry delay when starting a new spin-wait cycle"
  Revert "ARCv2: spinlock/rwlock/atomics: reduce 1 instruction in exponential backoff"
  ARC: don't enable DISCONTIGMEM unconditionally
  ARC: [intc-compact] simplify code for 2 priority levels
  arc: Get rid of root core-frequency property
  Fix typos
This commit is contained in:
Linus Torvalds 2016-06-09 14:28:39 -07:00
parent c8ae067f26 ed6aefed72
commit 52e7d46c64
35 changed files with 30 additions and 415 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
arch/arc/Kconfig
View File

@ -61,7 +61,7 @@ config RWSEM_GENERIC_SPINLOCK
def_bool y
config ARCH_DISCONTIGMEM_ENABLE
def_bool y
def_bool n
config ARCH_FLATMEM_ENABLE
def_bool y
@ -186,9 +186,6 @@ if SMP
config ARC_HAS_COH_CACHES
def_bool n
config ARC_HAS_REENTRANT_IRQ_LV2
def_bool n
config ARC_MCIP
bool "ARConnect Multicore IP (MCIP) Support "
depends on ISA_ARCV2
@ -366,25 +363,10 @@ config NODES_SHIFT
if ISA_ARCOMPACT
config ARC_COMPACT_IRQ_LEVELS
bool "ARCompact IRQ Priorities: High(2)/Low(1)"
bool "Setup Timer IRQ as high Priority"
default n
# Timer HAS to be high priority, for any other high priority config
select ARC_IRQ3_LV2
# if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
if ARC_COMPACT_IRQ_LEVELS
config ARC_IRQ3_LV2
bool
config ARC_IRQ5_LV2
bool
config ARC_IRQ6_LV2
bool
endif #ARC_COMPACT_IRQ_LEVELS
depends on !SMP
config ARC_FPU_SAVE_RESTORE
bool "Enable FPU state persistence across context switch"
@ -407,11 +389,6 @@ config ARC_HAS_LLSC
default y
depends on !ARC_CANT_LLSC
config ARC_STAR_9000923308
bool "Workaround for llock/scond livelock"
default n
depends on ISA_ARCV2 && SMP && ARC_HAS_LLSC
config ARC_HAS_SWAPE
bool "Insn: SWAPE (endian-swap)"
default y
@ -471,7 +448,7 @@ config LINUX_LINK_BASE
config HIGHMEM
bool "High Memory Support"
select DISCONTIGMEM
select ARCH_DISCONTIGMEM_ENABLE
help
With ARC 2G:2G address split, only upper 2G is directly addressable by
kernel. Enable this to potentially allow access to rest of 2G and PAE

2
arch/arc/Makefile
View File

@ -127,7 +127,7 @@ libs-y += arch/arc/lib/ $(LIBGCC)
boot := arch/arc/boot
#default target for make without any arguements.
#default target for make without any arguments.
KBUILD_IMAGE := bootpImage
all: $(KBUILD_IMAGE)

2
arch/arc/boot/dts/abilis_tb100.dtsi
View File

@ -23,8 +23,6 @@
/ {
clock-frequency = <500000000>; /* 500 MHZ */
soc100 {
bus-frequency = <166666666>;

2
arch/arc/boot/dts/abilis_tb101.dtsi
View File

@ -23,8 +23,6 @@
/ {
clock-frequency = <500000000>; /* 500 MHZ */
soc100 {
bus-frequency = <166666666>;

1
arch/arc/boot/dts/axc001.dtsi
View File

@ -15,7 +15,6 @@
/ {
compatible = "snps,arc";
clock-frequency = <750000000>; /* 750 MHZ */
#address-cells = <1>;
#size-cells = <1>;

1
arch/arc/boot/dts/axc003.dtsi
View File

@ -14,7 +14,6 @@
/ {
compatible = "snps,arc";
clock-frequency = <90000000>;
#address-cells = <1>;
#size-cells = <1>;

1
arch/arc/boot/dts/axc003_idu.dtsi
View File

@ -14,7 +14,6 @@
/ {
compatible = "snps,arc";
clock-frequency = <90000000>;
#address-cells = <1>;
#size-cells = <1>;

1
arch/arc/boot/dts/eznps.dts
View File

@ -18,7 +18,6 @@
/ {
compatible = "ezchip,arc-nps";
clock-frequency = <83333333>; /* 83.333333 MHZ */
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&intc>;

1
arch/arc/boot/dts/nsim_700.dts
View File

@ -11,7 +11,6 @@
/ {
compatible = "snps,nsim";
clock-frequency = <80000000>; /* 80 MHZ */
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&core_intc>;

1
arch/arc/boot/dts/nsimosci.dts
View File

@ -11,7 +11,6 @@
/ {
compatible = "snps,nsimosci";
clock-frequency = <20000000>; /* 20 MHZ */
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&core_intc>;

1
arch/arc/boot/dts/nsimosci_hs.dts
View File

@ -11,7 +11,6 @@
/ {
compatible = "snps,nsimosci_hs";
clock-frequency = <20000000>; /* 20 MHZ */
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&core_intc>;

1
arch/arc/boot/dts/nsimosci_hs_idu.dts
View File

@ -11,7 +11,6 @@
/ {
compatible = "snps,nsimosci_hs";
clock-frequency = <5000000>; /* 5 MHZ */
#address-cells = <1>;
#size-cells = <1>;
interrupt-parent = <&core_intc>;

1
arch/arc/boot/dts/skeleton.dtsi
View File

@ -13,7 +13,6 @@
/ {
compatible = "snps,arc";
clock-frequency = <80000000>; /* 80 MHZ */
#address-cells = <1>;
#size-cells = <1>;
chosen { };

1
arch/arc/boot/dts/skeleton_hs.dtsi
View File

@ -8,7 +8,6 @@
/ {
compatible = "snps,arc";
clock-frequency = <80000000>; /* 80 MHZ */
#address-cells = <1>;
#size-cells = <1>;
chosen { };

1
arch/arc/boot/dts/skeleton_hs_idu.dtsi
View File

@ -8,7 +8,6 @@
/ {
compatible = "snps,arc";
clock-frequency = <80000000>; /* 80 MHZ */
#address-cells = <1>;
#size-cells = <1>;
chosen { };

1
arch/arc/boot/dts/vdk_axc003.dtsi
View File

@ -14,7 +14,6 @@
/ {
compatible = "snps,arc";
clock-frequency = <50000000>;
#address-cells = <1>;
#size-cells = <1>;

1
arch/arc/boot/dts/vdk_axc003_idu.dtsi
View File

@ -15,7 +15,6 @@
/ {
compatible = "snps,arc";
clock-frequency = <50000000>;
#address-cells = <1>;
#size-cells = <1>;

45
arch/arc/include/asm/atomic.h
View File

@ -25,50 +25,17 @@
#define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
#ifdef CONFIG_ARC_STAR_9000923308
#define SCOND_FAIL_RETRY_VAR_DEF \
unsigned int delay = 1, tmp; \
#define SCOND_FAIL_RETRY_ASM \
" bz 4f \n" \
" ; --- scond fail delay --- \n" \
" mov %[tmp], %[delay] \n" /* tmp = delay */ \
"2: brne.d %[tmp], 0, 2b \n" /* while (tmp != 0) */ \
" sub %[tmp], %[tmp], 1 \n" /* tmp-- */ \
" rol %[delay], %[delay] \n" /* delay *= 2 */ \
" b 1b \n" /* start over */ \
"4: ; --- success --- \n" \
#define SCOND_FAIL_RETRY_VARS \
,[delay] "+&r" (delay),[tmp] "=&r" (tmp) \
#else /* !CONFIG_ARC_STAR_9000923308 */
#define SCOND_FAIL_RETRY_VAR_DEF
#define SCOND_FAIL_RETRY_ASM \
" bnz 1b \n" \
#define SCOND_FAIL_RETRY_VARS
#endif
#define ATOMIC_OP(op, c_op, asm_op) \
static inline void atomic_##op(int i, atomic_t *v) \
{ \
unsigned int val; \
SCOND_FAIL_RETRY_VAR_DEF \
unsigned int val; \
\
__asm__ __volatile__( \
"1: llock %[val], [%[ctr]] \n" \
" " #asm_op " %[val], %[val], %[i] \n" \
" scond %[val], [%[ctr]] \n" \
" \n" \
SCOND_FAIL_RETRY_ASM \
\
" bnz 1b \n" \
: [val] "=&r" (val) /* Early clobber to prevent reg reuse */ \
SCOND_FAIL_RETRY_VARS \
: [ctr] "r" (&v->counter), /* Not "m": llock only supports reg direct addr mode */ \
[i] "ir" (i) \
: "cc"); \
@ -77,8 +44,7 @@ static inline void atomic_##op(int i, atomic_t *v) \
#define ATOMIC_OP_RETURN(op, c_op, asm_op) \
static inline int atomic_##op##_return(int i, atomic_t *v) \
{ \
unsigned int val; \
SCOND_FAIL_RETRY_VAR_DEF \
unsigned int val; \
\
/* \
* Explicit full memory barrier needed before/after as \
@ -90,11 +56,8 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \
"1: llock %[val], [%[ctr]] \n" \
" " #asm_op " %[val], %[val], %[i] \n" \
" scond %[val], [%[ctr]] \n" \
" \n" \
SCOND_FAIL_RETRY_ASM \
\
" bnz 1b \n" \
: [val] "=&r" (val) \
SCOND_FAIL_RETRY_VARS \
: [ctr] "r" (&v->counter), \
[i] "ir" (i) \
: "cc"); \

4
arch/arc/include/asm/entry-compact.h
View File

@ -76,8 +76,8 @@
* We need to be a bit more cautious here. What if a kernel bug in
* L1 ISR, caused SP to go whaco (some small value which looks like
* USER stk) and then we take L2 ISR.
* Above brlo alone would treat it as a valid L1-L2 sceanrio
* instead of shouting alound
* Above brlo alone would treat it as a valid L1-L2 scenario
* instead of shouting around
* The only feasible way is to make sure this L2 happened in
* L1 prelogue ONLY i.e. ilink2 is less than a pre-set marker in
* L1 ISR before it switches stack

2
arch/arc/include/asm/mmu_context.h
View File

@ -83,7 +83,7 @@ static inline void get_new_mmu_context(struct mm_struct *mm)
local_flush_tlb_all();
/*
* Above checke for rollover of 8 bit ASID in 32 bit container.
* Above check for rollover of 8 bit ASID in 32 bit container.
* If the container itself wrapped around, set it to a non zero
* "generation" to distinguish from no context
*/

2
arch/arc/include/asm/pgtable.h
View File

@ -47,7 +47,7 @@
* Page Tables are purely for Linux VM's consumption and the bits below are
* suited to that (uniqueness). Hence some are not implemented in the TLB and
* some have different value in TLB.
* e.g. MMU v2: K_READ bit is 8 and so is GLOBAL (possible becoz they live in
* e.g. MMU v2: K_READ bit is 8 and so is GLOBAL (possible because they live in
* seperate PD0 and PD1, which combined forms a translation entry)
* while for PTE perspective, they are 8 and 9 respectively
* with MMU v3: Most bits (except SHARED) represent the exact hardware pos

2
arch/arc/include/asm/processor.h
View File

@ -78,7 +78,7 @@ struct task_struct;
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp)
/*
* Where abouts of Task's sp, fp, blink when it was last seen in kernel mode.
* Where about of Task's sp, fp, blink when it was last seen in kernel mode.
* Look in process.c for details of kernel stack layout
*/
#define TSK_K_ESP(tsk) (tsk->thread.ksp)

2
arch/arc/include/asm/smp.h
View File

@ -86,7 +86,7 @@ static inline const char *arc_platform_smp_cpuinfo(void)
* (1) These insn were introduced only in 4.10 release. So for older released
* support needed.
*
* (2) In a SMP setup, the LLOCK/SCOND atomiticity across CPUs needs to be
* (2) In a SMP setup, the LLOCK/SCOND atomicity across CPUs needs to be
* gaurantted by the platform (not something which core handles).
* Assuming a platform won't, SMP Linux needs to use spinlocks + local IRQ
* disabling for atomicity.

292
arch/arc/include/asm/spinlock.h
View File

@ -20,11 +20,6 @@
#ifdef CONFIG_ARC_HAS_LLSC
/*
* A normal LLOCK/SCOND based system, w/o need for livelock workaround
*/
#ifndef CONFIG_ARC_STAR_9000923308
static inline void arch_spin_lock(arch_spinlock_t *lock)
{
unsigned int val;
@ -238,293 +233,6 @@ static inline void arch_write_unlock(arch_rwlock_t *rw)
smp_mb();
}
#else /* CONFIG_ARC_STAR_9000923308 */
/*
* HS38x4 could get into a LLOCK/SCOND livelock in case of multiple overlapping
* coherency transactions in the SCU. The exclusive line state keeps rotating
* among contenting cores leading to a never ending cycle. So break the cycle
* by deferring the retry of failed exclusive access (SCOND). The actual delay
* needed is function of number of contending cores as well as the unrelated
* coherency traffic from other cores. To keep the code simple, start off with
* small delay of 1 which would suffice most cases and in case of contention
* double the delay. Eventually the delay is sufficient such that the coherency
* pipeline is drained, thus a subsequent exclusive access would succeed.
*/
#define SCOND_FAIL_RETRY_VAR_DEF \
unsigned int delay, tmp; \
#define SCOND_FAIL_RETRY_ASM \
" ; --- scond fail delay --- \n" \
" mov %[tmp], %[delay] \n" /* tmp = delay */ \
"2: brne.d %[tmp], 0, 2b \n" /* while (tmp != 0) */ \
" sub %[tmp], %[tmp], 1 \n" /* tmp-- */ \
" rol %[delay], %[delay] \n" /* delay *= 2 */ \
" b 1b \n" /* start over */ \
" \n" \
"4: ; --- done --- \n" \
#define SCOND_FAIL_RETRY_VARS \
,[delay] "=&r" (delay), [tmp] "=&r" (tmp) \
static inline void arch_spin_lock(arch_spinlock_t *lock)
{
unsigned int val;
SCOND_FAIL_RETRY_VAR_DEF;
smp_mb();
__asm__ __volatile__(
"0: mov %[delay], 1 \n"
"1: llock %[val], [%[slock]] \n"
" breq %[val], %[LOCKED], 0b \n" /* spin while LOCKED */
" scond %[LOCKED], [%[slock]] \n" /* acquire */
" bz 4f \n" /* done */
" \n"
SCOND_FAIL_RETRY_ASM
: [val] "=&r" (val)
SCOND_FAIL_RETRY_VARS
: [slock] "r" (&(lock->slock)),
[LOCKED] "r" (__ARCH_SPIN_LOCK_LOCKED__)
: "memory", "cc");
smp_mb();
}
/* 1 - lock taken successfully */
static inline int arch_spin_trylock(arch_spinlock_t *lock)
{
unsigned int val, got_it = 0;
SCOND_FAIL_RETRY_VAR_DEF;
smp_mb();
__asm__ __volatile__(
"0: mov %[delay], 1 \n"
"1: llock %[val], [%[slock]] \n"
" breq %[val], %[LOCKED], 4f \n" /* already LOCKED, just bail */
" scond %[LOCKED], [%[slock]] \n" /* acquire */
" bz.d 4f \n"
" mov.z %[got_it], 1 \n" /* got it */
" \n"
SCOND_FAIL_RETRY_ASM
: [val] "=&r" (val),
[got_it] "+&r" (got_it)
SCOND_FAIL_RETRY_VARS
: [slock] "r" (&(lock->slock)),
[LOCKED] "r" (__ARCH_SPIN_LOCK_LOCKED__)
: "memory", "cc");
smp_mb();
return got_it;
}
static inline void arch_spin_unlock(arch_spinlock_t *lock)
{
smp_mb();
lock->slock = __ARCH_SPIN_LOCK_UNLOCKED__;
smp_mb();
}
/*
* Read-write spinlocks, allowing multiple readers but only one writer.
* Unfair locking as Writers could be starved indefinitely by Reader(s)
*/
static inline void arch_read_lock(arch_rwlock_t *rw)
{
unsigned int val;
SCOND_FAIL_RETRY_VAR_DEF;
smp_mb();
/*
* zero means writer holds the lock exclusively, deny Reader.
* Otherwise grant lock to first/subseq reader
*
* if (rw->counter > 0) {
* rw->counter--;
* ret = 1;
* }
*/
__asm__ __volatile__(
"0: mov %[delay], 1 \n"
"1: llock %[val], [%[rwlock]] \n"
" brls %[val], %[WR_LOCKED], 0b\n" /* <= 0: spin while write locked */
" sub %[val], %[val], 1 \n" /* reader lock */
" scond %[val], [%[rwlock]] \n"
" bz 4f \n" /* done */
" \n"
SCOND_FAIL_RETRY_ASM
: [val] "=&r" (val)
SCOND_FAIL_RETRY_VARS
: [rwlock] "r" (&(rw->counter)),
[WR_LOCKED] "ir" (0)
: "memory", "cc");
smp_mb();
}
/* 1 - lock taken successfully */
static inline int arch_read_trylock(arch_rwlock_t *rw)
{
unsigned int val, got_it = 0;
SCOND_FAIL_RETRY_VAR_DEF;
smp_mb();
__asm__ __volatile__(
"0: mov %[delay], 1 \n"
"1: llock %[val], [%[rwlock]] \n"
" brls %[val], %[WR_LOCKED], 4f\n" /* <= 0: already write locked, bail */
" sub %[val], %[val], 1 \n" /* counter-- */
" scond %[val], [%[rwlock]] \n"
" bz.d 4f \n"
" mov.z %[got_it], 1 \n" /* got it */
" \n"
SCOND_FAIL_RETRY_ASM
: [val] "=&r" (val),
[got_it] "+&r" (got_it)
SCOND_FAIL_RETRY_VARS
: [rwlock] "r" (&(rw->counter)),
[WR_LOCKED] "ir" (0)
: "memory", "cc");
smp_mb();
return got_it;
}
static inline void arch_write_lock(arch_rwlock_t *rw)
{
unsigned int val;
SCOND_FAIL_RETRY_VAR_DEF;
smp_mb();
/*
* If reader(s) hold lock (lock < __ARCH_RW_LOCK_UNLOCKED__),
* deny writer. Otherwise if unlocked grant to writer
* Hence the claim that Linux rwlocks are unfair to writers.
* (can be starved for an indefinite time by readers).
*
* if (rw->counter == __ARCH_RW_LOCK_UNLOCKED__) {
* rw->counter = 0;
* ret = 1;
* }
*/
__asm__ __volatile__(
"0: mov %[delay], 1 \n"
"1: llock %[val], [%[rwlock]] \n"
" brne %[val], %[UNLOCKED], 0b \n" /* while !UNLOCKED spin */
" mov %[val], %[WR_LOCKED] \n"
" scond %[val], [%[rwlock]] \n"
" bz 4f \n"
" \n"
SCOND_FAIL_RETRY_ASM
: [val] "=&r" (val)
SCOND_FAIL_RETRY_VARS
: [rwlock] "r" (&(rw->counter)),
[UNLOCKED] "ir" (__ARCH_RW_LOCK_UNLOCKED__),
[WR_LOCKED] "ir" (0)
: "memory", "cc");
smp_mb();
}
/* 1 - lock taken successfully */
static inline int arch_write_trylock(arch_rwlock_t *rw)
{
unsigned int val, got_it = 0;
SCOND_FAIL_RETRY_VAR_DEF;
smp_mb();
__asm__ __volatile__(
"0: mov %[delay], 1 \n"
"1: llock %[val], [%[rwlock]] \n"
" brne %[val], %[UNLOCKED], 4f \n" /* !UNLOCKED, bail */
" mov %[val], %[WR_LOCKED] \n"
" scond %[val], [%[rwlock]] \n"
" bz.d 4f \n"
" mov.z %[got_it], 1 \n" /* got it */
" \n"
SCOND_FAIL_RETRY_ASM
: [val] "=&r" (val),
[got_it] "+&r" (got_it)
SCOND_FAIL_RETRY_VARS
: [rwlock] "r" (&(rw->counter)),
[UNLOCKED] "ir" (__ARCH_RW_LOCK_UNLOCKED__),
[WR_LOCKED] "ir" (0)
: "memory", "cc");
smp_mb();
return got_it;
}
static inline void arch_read_unlock(arch_rwlock_t *rw)
{
unsigned int val;
smp_mb();
/*
* rw->counter++;
*/
__asm__ __volatile__(
"1: llock %[val], [%[rwlock]] \n"
" add %[val], %[val], 1 \n"
" scond %[val], [%[rwlock]] \n"
" bnz 1b \n"
" \n"
: [val] "=&r" (val)
: [rwlock] "r" (&(rw->counter))
: "memory", "cc");
smp_mb();
}
static inline void arch_write_unlock(arch_rwlock_t *rw)
{
unsigned int val;
smp_mb();
/*
* rw->counter = __ARCH_RW_LOCK_UNLOCKED__;
*/
__asm__ __volatile__(
"1: llock %[val], [%[rwlock]] \n"
" scond %[UNLOCKED], [%[rwlock]]\n"
" bnz 1b \n"
" \n"
: [val] "=&r" (val)
: [rwlock] "r" (&(rw->counter)),
[UNLOCKED] "r" (__ARCH_RW_LOCK_UNLOCKED__)
: "memory", "cc");
smp_mb();
}
#undef SCOND_FAIL_RETRY_VAR_DEF
#undef SCOND_FAIL_RETRY_ASM
#undef SCOND_FAIL_RETRY_VARS
#endif /* CONFIG_ARC_STAR_9000923308 */
#else /* !CONFIG_ARC_HAS_LLSC */
static inline void arch_spin_lock(arch_spinlock_t *lock)

2
arch/arc/include/asm/thread_info.h
View File

@ -103,7 +103,7 @@ static inline __attribute_const__ struct thread_info *current_thread_info(void)
/*
* _TIF_ALLWORK_MASK includes SYSCALL_TRACE, but we don't need it.
* SYSCALL_TRACE is anways seperately/unconditionally tested right after a
* SYSCALL_TRACE is anyway seperately/unconditionally tested right after a
* syscall, so all that reamins to be tested is _TIF_WORK_MASK
*/

2
arch/arc/include/asm/uaccess.h
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@ -32,7 +32,7 @@
#define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
/*
* Algorthmically, for __user_ok() we want do:
* Algorithmically, for __user_ok() we want do:
* (start < TASK_SIZE) && (start+len < TASK_SIZE)
* where TASK_SIZE could either be retrieved from thread_info->addr_limit or
* emitted directly in code.

2
arch/arc/include/uapi/asm/swab.h
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@ -74,7 +74,7 @@
__tmp ^ __in; \
})
#elif (ARC_BSWAP_TYPE == 2) /* Custom single cycle bwap instruction */
#elif (ARC_BSWAP_TYPE == 2) /* Custom single cycle bswap instruction */
#define __arch_swab32(x) \
({ \

18
arch/arc/kernel/entry-compact.S
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@ -91,27 +91,13 @@ VECTOR mem_service ; 0x8, Mem exception (0x1)
VECTOR instr_service ; 0x10, Instrn Error (0x2)
; ******************** Device ISRs **********************
#ifdef CONFIG_ARC_IRQ3_LV2
#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
VECTOR handle_interrupt_level1
#ifdef CONFIG_ARC_IRQ5_LV2
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
#ifdef CONFIG_ARC_IRQ6_LV2
VECTOR handle_interrupt_level2
#else
VECTOR handle_interrupt_level1
#endif
.rept 25
.rept 28
VECTOR handle_interrupt_level1 ; Other devices
.endr

6
arch/arc/kernel/intc-compact.c
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@ -28,10 +28,8 @@ void arc_init_IRQ(void)
{
int level_mask = 0;
/* setup any high priority Interrupts (Level2 in ARCompact jargon) */
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ3_LV2) << 3;
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ5_LV2) << 5;
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ6_LV2) << 6;
/* Is timer high priority Interrupt (Level2 in ARCompact jargon) */
level_mask |= IS_ENABLED(CONFIG_ARC_COMPACT_IRQ_LEVELS) << TIMER0_IRQ;
/*
* Write to register, even if no LV2 IRQs configured to reset it

2
arch/arc/kernel/perf_event.c
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@ -108,7 +108,7 @@ static void arc_perf_event_update(struct perf_event *event,
int64_t delta = new_raw_count - prev_raw_count;
/*
* We don't afaraid of hwc->prev_count changing beneath our feet
* We aren't afraid of hwc->prev_count changing beneath our feet
* because there's no way for us to re-enter this function anytime.
*/
local64_set(&hwc->prev_count, new_raw_count);

2
arch/arc/kernel/setup.c
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@ -392,7 +392,7 @@ void __init setup_arch(char **cmdline_p)
/*
* If we are here, it is established that @uboot_arg didn't
* point to DT blob. Instead if u-boot says it is cmdline,
* Appent to embedded DT cmdline.
* append to embedded DT cmdline.
* setup_machine_fdt() would have populated @boot_command_line
*/
if (uboot_tag == 1) {

2
arch/arc/kernel/signal.c
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@ -34,7 +34,7 @@
* -ViXS were still seeing crashes when using insmod to load drivers.
* It turned out that the code to change Execute permssions for TLB entries
* of user was not guarded for interrupts (mod_tlb_permission)
* This was cauing TLB entries to be overwritten on unrelated indexes
* This was causing TLB entries to be overwritten on unrelated indexes
*
* Vineetg: July 15th 2008: Bug #94183
* -Exception happens in Delay slot of a JMP, and before user space resumes,

2
arch/arc/kernel/troubleshoot.c
View File

@ -276,7 +276,7 @@ static int tlb_stats_open(struct inode *inode, struct file *file)
return 0;
}
/* called on user read(): display the couters */
/* called on user read(): display the counters */
static ssize_t tlb_stats_output(struct file *file, /* file descriptor */
char __user *user_buf, /* user buffer */
size_t len, /* length of buffer */

6
arch/arc/mm/cache.c
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@ -215,7 +215,7 @@ slc_chk:
* ------------------
* This ver of MMU supports variable page sizes (1k-16k): although Linux will
* only support 8k (default), 16k and 4k.
* However from hardware perspective, smaller page sizes aggrevate aliasing
* However from hardware perspective, smaller page sizes aggravate aliasing
* meaning more vaddr bits needed to disambiguate the cache-line-op ;
* the existing scheme of piggybacking won't work for certain configurations.
* Two new registers IC_PTAG and DC_PTAG inttoduced.
@ -302,7 +302,7 @@ void __cache_line_loop_v3(phys_addr_t paddr, unsigned long vaddr,
/*
* This is technically for MMU v4, using the MMU v3 programming model
* Special work for HS38 aliasing I-cache configuratino with PAE40
* Special work for HS38 aliasing I-cache configuration with PAE40
* - upper 8 bits of paddr need to be written into PTAG_HI
* - (and needs to be written before the lower 32 bits)
* Note that PTAG_HI is hoisted outside the line loop
@ -936,7 +936,7 @@ void arc_cache_init(void)
ic->ver, CONFIG_ARC_MMU_VER);
/*
* In MMU v4 (HS38x) the alising icache config uses IVIL/PTAG
* In MMU v4 (HS38x) the aliasing icache config uses IVIL/PTAG
* pair to provide vaddr/paddr respectively, just as in MMU v3
*/
if (is_isa_arcv2() && ic->alias)

2
arch/arc/mm/dma.c
View File

@ -10,7 +10,7 @@
* DMA Coherent API Notes
*
* I/O is inherently non-coherent on ARC. So a coherent DMA buffer is
* implemented by accessintg it using a kernel virtual address, with
* implemented by accessing it using a kernel virtual address, with
* Cache bit off in the TLB entry.
*
* The default DMA address == Phy address which is 0x8000_0000 based.