2019-06-04 11:11:33 +03:00
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# SPDX-License-Identifier: GPL-2.0-only
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2013-01-18 13:42:20 +04:00
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#
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# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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#
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config ARC
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def_bool y
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2016-10-31 23:46:38 +03:00
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select ARC_TIMERS
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2018-09-11 09:55:28 +03:00
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select ARCH_HAS_DMA_COHERENT_TO_PFN
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2019-06-14 17:26:41 +03:00
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select ARCH_HAS_DMA_PREP_COHERENT
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2018-08-16 20:20:33 +03:00
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select ARCH_HAS_PTE_SPECIAL
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2019-01-07 21:36:20 +03:00
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select ARCH_HAS_SETUP_DMA_OPS
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2018-05-18 16:41:32 +03:00
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select ARCH_HAS_SYNC_DMA_FOR_CPU
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select ARCH_HAS_SYNC_DMA_FOR_DEVICE
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2015-08-08 15:21:58 +03:00
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select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
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32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option
All new 32-bit architectures should have 64-bit userspace off_t type, but
existing architectures has 32-bit ones.
To enforce the rule, new config option is added to arch/Kconfig that defaults
ARCH_32BIT_OFF_T to be disabled for new 32-bit architectures. All existing
32-bit architectures enable it explicitly.
New option affects force_o_largefile() behaviour. Namely, if userspace
off_t is 64-bits long, we have no reason to reject user to open big files.
Note that even if architectures has only 64-bit off_t in the kernel
(arc, c6x, h8300, hexagon, nios2, openrisc, and unicore32),
a libc may use 32-bit off_t, and therefore want to limit the file size
to 4GB unless specified differently in the open flags.
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Yury Norov <ynorov@marvell.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-05-16 11:18:49 +03:00
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select ARCH_32BIT_OFF_T
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2013-11-15 10:38:05 +04:00
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select BUILDTIME_EXTABLE_SORT
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2013-01-18 13:42:18 +04:00
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select CLONE_BACKWARDS
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2016-01-14 09:50:08 +03:00
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select COMMON_CLK
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2019-06-14 17:26:41 +03:00
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select DMA_DIRECT_REMAP
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2015-07-27 14:53:28 +03:00
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select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
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2013-01-18 13:42:20 +04:00
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select GENERIC_CLOCKEVENTS
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select GENERIC_FIND_FIRST_BIT
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# for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
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select GENERIC_IRQ_SHOW
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2016-03-10 23:44:13 +03:00
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select GENERIC_PCI_IOMAP
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2013-01-18 13:42:20 +04:00
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select GENERIC_PENDING_IRQ if SMP
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2018-11-19 14:29:17 +03:00
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select GENERIC_SCHED_CLOCK
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2013-01-18 13:42:20 +04:00
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select GENERIC_SMP_IDLE_THREAD
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2013-01-18 13:42:24 +04:00
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select HAVE_ARCH_KGDB
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2013-01-18 13:42:22 +04:00
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select HAVE_ARCH_TRACEHOOK
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2018-08-16 20:20:33 +03:00
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select HAVE_DEBUG_STACKOVERFLOW
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2017-09-30 00:46:50 +03:00
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select HAVE_FUTEX_CMPXCHG if FUTEX
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2013-01-22 15:18:45 +04:00
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select HAVE_IOREMAP_PROT
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2018-08-16 20:20:33 +03:00
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select HAVE_KERNEL_GZIP
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select HAVE_KERNEL_LZMA
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2013-01-22 15:33:59 +04:00
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select HAVE_KPROBES
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select HAVE_KRETPROBES
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2017-01-16 21:48:09 +03:00
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select HAVE_MOD_ARCH_SPECIFIC
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2013-01-22 15:32:38 +04:00
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select HAVE_OPROFILE
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2013-01-18 13:42:24 +04:00
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select HAVE_PERF_EVENTS
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2016-01-01 12:42:54 +03:00
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select HANDLE_DOMAIN_IRQ
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2013-01-22 15:30:52 +04:00
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select IRQ_DOMAIN
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2013-01-18 13:42:20 +04:00
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select MODULES_USE_ELF_RELA
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2013-01-22 15:30:52 +04:00
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select OF
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select OF_EARLY_FLATTREE
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2018-11-15 22:05:34 +03:00
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select PCI_SYSCALL if PCI
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2016-09-28 21:53:17 +03:00
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select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING
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2013-01-18 13:42:20 +04:00
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2018-07-26 16:15:43 +03:00
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config ARCH_HAS_CACHE_LINE_SIZE
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def_bool y
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2013-09-06 12:48:17 +04:00
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config TRACE_IRQFLAGS_SUPPORT
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def_bool y
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config LOCKDEP_SUPPORT
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def_bool y
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2013-01-18 13:42:20 +04:00
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config SCHED_OMIT_FRAME_POINTER
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def_bool y
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config GENERIC_CSUM
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def_bool y
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2016-04-18 08:19:56 +03:00
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config ARCH_DISCONTIGMEM_ENABLE
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2016-05-31 09:16:47 +03:00
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def_bool n
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2016-04-18 08:19:56 +03:00
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2013-01-18 13:42:20 +04:00
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config ARCH_FLATMEM_ENABLE
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def_bool y
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config MMU
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def_bool y
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2014-04-08 02:39:19 +04:00
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config NO_IOPORT_MAP
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2013-01-18 13:42:20 +04:00
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def_bool y
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config GENERIC_CALIBRATE_DELAY
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def_bool y
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config GENERIC_HWEIGHT
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def_bool y
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2013-01-18 13:42:23 +04:00
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config STACKTRACE_SUPPORT
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def_bool y
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select STACKTRACE
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2014-07-08 17:13:47 +04:00
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config HAVE_ARCH_TRANSPARENT_HUGEPAGE
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def_bool y
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depends on ARC_MMU_V4
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2013-01-18 13:42:20 +04:00
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menu "ARC Architecture Configuration"
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2013-01-22 15:21:50 +04:00
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menu "ARC Platform/SoC/Board"
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2013-01-18 13:42:20 +04:00
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2013-04-12 10:40:59 +04:00
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source "arch/arc/plat-tb10x/Kconfig"
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2014-01-27 17:51:34 +04:00
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source "arch/arc/plat-axs10x/Kconfig"
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2013-01-18 13:42:20 +04:00
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#New platform adds here
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2015-10-16 16:52:43 +03:00
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source "arch/arc/plat-eznps/Kconfig"
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2017-08-15 21:13:55 +03:00
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source "arch/arc/plat-hsdk/Kconfig"
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2013-01-22 15:21:50 +04:00
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2013-01-18 13:42:25 +04:00
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endmenu
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2013-01-18 13:42:20 +04:00
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ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
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choice
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prompt "ARC Instruction Set"
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2018-11-30 15:51:56 +03:00
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default ISA_ARCV2
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ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
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config ISA_ARCOMPACT
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bool "ARCompact ISA"
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lib/GCD.c: use binary GCD algorithm instead of Euclidean
The binary GCD algorithm is based on the following facts:
1. If a and b are all evens, then gcd(a,b) = 2 * gcd(a/2, b/2)
2. If a is even and b is odd, then gcd(a,b) = gcd(a/2, b)
3. If a and b are all odds, then gcd(a,b) = gcd((a-b)/2, b) = gcd((a+b)/2, b)
Even on x86 machines with reasonable division hardware, the binary
algorithm runs about 25% faster (80% the execution time) than the
division-based Euclidian algorithm.
On platforms like Alpha and ARMv6 where division is a function call to
emulation code, it's even more significant.
There are two variants of the code here, depending on whether a fast
__ffs (find least significant set bit) instruction is available. This
allows the unpredictable branches in the bit-at-a-time shifting loop to
be eliminated.
If fast __ffs is not available, the "even/odd" GCD variant is used.
I use the following code to benchmark:
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define swap(a, b) \
do { \
a ^= b; \
b ^= a; \
a ^= b; \
} while (0)
unsigned long gcd0(unsigned long a, unsigned long b)
{
unsigned long r;
if (a < b) {
swap(a, b);
}
if (b == 0)
return a;
while ((r = a % b) != 0) {
a = b;
b = r;
}
return b;
}
unsigned long gcd1(unsigned long a, unsigned long b)
{
unsigned long r = a | b;
if (!a || !b)
return r;
b >>= __builtin_ctzl(b);
for (;;) {
a >>= __builtin_ctzl(a);
if (a == b)
return a << __builtin_ctzl(r);
if (a < b)
swap(a, b);
a -= b;
}
}
unsigned long gcd2(unsigned long a, unsigned long b)
{
unsigned long r = a | b;
if (!a || !b)
return r;
r &= -r;
while (!(b & r))
b >>= 1;
for (;;) {
while (!(a & r))
a >>= 1;
if (a == b)
return a;
if (a < b)
swap(a, b);
a -= b;
a >>= 1;
if (a & r)
a += b;
a >>= 1;
}
}
unsigned long gcd3(unsigned long a, unsigned long b)
{
unsigned long r = a | b;
if (!a || !b)
return r;
b >>= __builtin_ctzl(b);
if (b == 1)
return r & -r;
for (;;) {
a >>= __builtin_ctzl(a);
if (a == 1)
return r & -r;
if (a == b)
return a << __builtin_ctzl(r);
if (a < b)
swap(a, b);
a -= b;
}
}
unsigned long gcd4(unsigned long a, unsigned long b)
{
unsigned long r = a | b;
if (!a || !b)
return r;
r &= -r;
while (!(b & r))
b >>= 1;
if (b == r)
return r;
for (;;) {
while (!(a & r))
a >>= 1;
if (a == r)
return r;
if (a == b)
return a;
if (a < b)
swap(a, b);
a -= b;
a >>= 1;
if (a & r)
a += b;
a >>= 1;
}
}
static unsigned long (*gcd_func[])(unsigned long a, unsigned long b) = {
gcd0, gcd1, gcd2, gcd3, gcd4,
};
#define TEST_ENTRIES (sizeof(gcd_func) / sizeof(gcd_func[0]))
#if defined(__x86_64__)
#define rdtscll(val) do { \
unsigned long __a,__d; \
__asm__ __volatile__("rdtsc" : "=a" (__a), "=d" (__d)); \
(val) = ((unsigned long long)__a) | (((unsigned long long)__d)<<32); \
} while(0)
static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long),
unsigned long a, unsigned long b, unsigned long *res)
{
unsigned long long start, end;
unsigned long long ret;
unsigned long gcd_res;
rdtscll(start);
gcd_res = gcd(a, b);
rdtscll(end);
if (end >= start)
ret = end - start;
else
ret = ~0ULL - start + 1 + end;
*res = gcd_res;
return ret;
}
#else
static inline struct timespec read_time(void)
{
struct timespec time;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &time);
return time;
}
static inline unsigned long long diff_time(struct timespec start, struct timespec end)
{
struct timespec temp;
if ((end.tv_nsec - start.tv_nsec) < 0) {
temp.tv_sec = end.tv_sec - start.tv_sec - 1;
temp.tv_nsec = 1000000000ULL + end.tv_nsec - start.tv_nsec;
} else {
temp.tv_sec = end.tv_sec - start.tv_sec;
temp.tv_nsec = end.tv_nsec - start.tv_nsec;
}
return temp.tv_sec * 1000000000ULL + temp.tv_nsec;
}
static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long),
unsigned long a, unsigned long b, unsigned long *res)
{
struct timespec start, end;
unsigned long gcd_res;
start = read_time();
gcd_res = gcd(a, b);
end = read_time();
*res = gcd_res;
return diff_time(start, end);
}
#endif
static inline unsigned long get_rand()
{
if (sizeof(long) == 8)
return (unsigned long)rand() << 32 | rand();
else
return rand();
}
int main(int argc, char **argv)
{
unsigned int seed = time(0);
int loops = 100;
int repeats = 1000;
unsigned long (*res)[TEST_ENTRIES];
unsigned long long elapsed[TEST_ENTRIES];
int i, j, k;
for (;;) {
int opt = getopt(argc, argv, "n:r:s:");
/* End condition always first */
if (opt == -1)
break;
switch (opt) {
case 'n':
loops = atoi(optarg);
break;
case 'r':
repeats = atoi(optarg);
break;
case 's':
seed = strtoul(optarg, NULL, 10);
break;
default:
/* You won't actually get here. */
break;
}
}
res = malloc(sizeof(unsigned long) * TEST_ENTRIES * loops);
memset(elapsed, 0, sizeof(elapsed));
srand(seed);
for (j = 0; j < loops; j++) {
unsigned long a = get_rand();
/* Do we have args? */
unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
unsigned long long min_elapsed[TEST_ENTRIES];
for (k = 0; k < repeats; k++) {
for (i = 0; i < TEST_ENTRIES; i++) {
unsigned long long tmp = benchmark_gcd_func(gcd_func[i], a, b, &res[j][i]);
if (k == 0 || min_elapsed[i] > tmp)
min_elapsed[i] = tmp;
}
}
for (i = 0; i < TEST_ENTRIES; i++)
elapsed[i] += min_elapsed[i];
}
for (i = 0; i < TEST_ENTRIES; i++)
printf("gcd%d: elapsed %llu\n", i, elapsed[i]);
k = 0;
srand(seed);
for (j = 0; j < loops; j++) {
unsigned long a = get_rand();
unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
for (i = 1; i < TEST_ENTRIES; i++) {
if (res[j][i] != res[j][0])
break;
}
if (i < TEST_ENTRIES) {
if (k == 0) {
k = 1;
fprintf(stderr, "Error:\n");
}
fprintf(stderr, "gcd(%lu, %lu): ", a, b);
for (i = 0; i < TEST_ENTRIES; i++)
fprintf(stderr, "%ld%s", res[j][i], i < TEST_ENTRIES - 1 ? ", " : "\n");
}
}
if (k == 0)
fprintf(stderr, "PASS\n");
free(res);
return 0;
}
Compiled with "-O2", on "VirtualBox 4.4.0-22-generic #38-Ubuntu x86_64" got:
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 10174
gcd1: elapsed 2120
gcd2: elapsed 2902
gcd3: elapsed 2039
gcd4: elapsed 2812
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9309
gcd1: elapsed 2280
gcd2: elapsed 2822
gcd3: elapsed 2217
gcd4: elapsed 2710
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9589
gcd1: elapsed 2098
gcd2: elapsed 2815
gcd3: elapsed 2030
gcd4: elapsed 2718
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9914
gcd1: elapsed 2309
gcd2: elapsed 2779
gcd3: elapsed 2228
gcd4: elapsed 2709
PASS
[akpm@linux-foundation.org: avoid #defining a CONFIG_ variable]
Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
Signed-off-by: George Spelvin <linux@horizon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-21 03:03:57 +03:00
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select CPU_NO_EFFICIENT_FFS
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ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
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help
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The original ARC ISA of ARC600/700 cores
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2015-03-09 11:31:08 +03:00
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config ISA_ARCV2
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bool "ARC ISA v2"
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2016-10-31 23:46:38 +03:00
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select ARC_TIMERS_64BIT
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2015-03-09 11:31:08 +03:00
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help
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ISA for the Next Generation ARC-HS cores
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ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
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endchoice
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2013-01-18 13:42:20 +04:00
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menu "ARC CPU Configuration"
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choice
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prompt "ARC Core"
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ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
|
|
|
default ARC_CPU_770 if ISA_ARCOMPACT
|
|
|
|
|
default ARC_CPU_HS if ISA_ARCV2
|
|
|
|
|
|
|
|
|
|
if ISA_ARCOMPACT
|
2013-01-18 13:42:20 +04:00
|
|
|
|
|
|
|
|
config ARC_CPU_750D
|
|
|
|
|
bool "ARC750D"
|
2015-06-26 10:12:53 +03:00
|
|
|
select ARC_CANT_LLSC
|
2013-01-18 13:42:20 +04:00
|
|
|
help
|
|
|
|
|
Support for ARC750 core
|
|
|
|
|
|
|
|
|
|
config ARC_CPU_770
|
|
|
|
|
bool "ARC770"
|
2013-11-07 13:17:16 +04:00
|
|
|
select ARC_HAS_SWAPE
|
2013-01-18 13:42:20 +04:00
|
|
|
help
|
|
|
|
|
Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
|
|
|
|
|
This core has a bunch of cool new features:
|
|
|
|
|
-MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
|
2019-03-11 16:57:59 +03:00
|
|
|
Shared Address Spaces (for sharing TLB entries in MMU)
|
2013-01-18 13:42:20 +04:00
|
|
|
-Caches: New Prog Model, Region Flush
|
|
|
|
|
-Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
|
|
|
|
|
|
2019-03-11 16:57:59 +03:00
|
|
|
endif #ISA_ARCOMPACT
|
ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
|
|
|
|
|
|
|
|
config ARC_CPU_HS
|
|
|
|
|
bool "ARC-HS"
|
|
|
|
|
depends on ISA_ARCV2
|
|
|
|
|
help
|
|
|
|
|
Support for ARC HS38x Cores based on ARCv2 ISA
|
|
|
|
|
The notable features are:
|
|
|
|
|
- SMP configurations of upto 4 core with coherency
|
|
|
|
|
- Optional L2 Cache and IO-Coherency
|
|
|
|
|
- Revised Interrupt Architecture (multiple priorites, reg banks,
|
|
|
|
|
auto stack switch, auto regfile save/restore)
|
|
|
|
|
- MMUv4 (PIPT dcache, Huge Pages)
|
|
|
|
|
- Instructions for
|
|
|
|
|
* 64bit load/store: LDD, STD
|
|
|
|
|
* Hardware assisted divide/remainder: DIV, REM
|
|
|
|
|
* Function prologue/epilogue: ENTER_S, LEAVE_S
|
|
|
|
|
* IRQ enable/disable: CLRI, SETI
|
|
|
|
|
* pop count: FFS, FLS
|
|
|
|
|
* SETcc, BMSKN, XBFU...
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
endchoice
|
|
|
|
|
|
|
|
|
|
config CPU_BIG_ENDIAN
|
|
|
|
|
bool "Enable Big Endian Mode"
|
|
|
|
|
help
|
|
|
|
|
Build kernel for Big Endian Mode of ARC CPU
|
|
|
|
|
|
2013-01-18 13:42:23 +04:00
|
|
|
config SMP
|
2014-09-10 17:35:38 +04:00
|
|
|
bool "Symmetric Multi-Processing"
|
|
|
|
|
select ARC_MCIP if ISA_ARCV2
|
2013-01-18 13:42:23 +04:00
|
|
|
help
|
2014-09-10 17:35:38 +04:00
|
|
|
This enables support for systems with more than one CPU.
|
2013-01-18 13:42:23 +04:00
|
|
|
|
|
|
|
|
if SMP
|
|
|
|
|
|
|
|
|
|
config NR_CPUS
|
2013-06-03 16:19:59 +04:00
|
|
|
int "Maximum number of CPUs (2-4096)"
|
|
|
|
|
range 2 4096
|
2014-09-10 17:35:38 +04:00
|
|
|
default "4"
|
|
|
|
|
|
2015-10-09 08:56:12 +03:00
|
|
|
config ARC_SMP_HALT_ON_RESET
|
|
|
|
|
bool "Enable Halt-on-reset boot mode"
|
|
|
|
|
help
|
|
|
|
|
In SMP configuration cores can be configured as Halt-on-reset
|
|
|
|
|
or they could all start at same time. For Halt-on-reset, non
|
|
|
|
|
masters are parked until Master kicks them so they can start of
|
|
|
|
|
at designated entry point. For other case, all jump to common
|
|
|
|
|
entry point and spin wait for Master's signal.
|
|
|
|
|
|
2019-03-11 16:57:59 +03:00
|
|
|
endif #SMP
|
2013-01-18 13:42:23 +04:00
|
|
|
|
2016-09-29 20:00:14 +03:00
|
|
|
config ARC_MCIP
|
|
|
|
|
bool "ARConnect Multicore IP (MCIP) Support "
|
|
|
|
|
depends on ISA_ARCV2
|
|
|
|
|
default y if SMP
|
|
|
|
|
help
|
|
|
|
|
This IP block enables SMP in ARC-HS38 cores.
|
|
|
|
|
It provides for cross-core interrupts, multi-core debug
|
|
|
|
|
hardware semaphores, shared memory,....
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
menuconfig ARC_CACHE
|
|
|
|
|
bool "Enable Cache Support"
|
|
|
|
|
default y
|
|
|
|
|
|
|
|
|
|
if ARC_CACHE
|
|
|
|
|
|
|
|
|
|
config ARC_CACHE_LINE_SHIFT
|
|
|
|
|
int "Cache Line Length (as power of 2)"
|
|
|
|
|
range 5 7
|
|
|
|
|
default "6"
|
|
|
|
|
help
|
|
|
|
|
Starting with ARC700 4.9, Cache line length is configurable,
|
|
|
|
|
This option specifies "N", with Line-len = 2 power N
|
|
|
|
|
So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
|
|
|
|
|
Linux only supports same line lengths for I and D caches.
|
|
|
|
|
|
|
|
|
|
config ARC_HAS_ICACHE
|
|
|
|
|
bool "Use Instruction Cache"
|
|
|
|
|
default y
|
|
|
|
|
|
|
|
|
|
config ARC_HAS_DCACHE
|
|
|
|
|
bool "Use Data Cache"
|
|
|
|
|
default y
|
|
|
|
|
|
|
|
|
|
config ARC_CACHE_PAGES
|
|
|
|
|
bool "Per Page Cache Control"
|
|
|
|
|
default y
|
|
|
|
|
depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
|
|
|
|
|
help
|
|
|
|
|
This can be used to over-ride the global I/D Cache Enable on a
|
|
|
|
|
per-page basis (but only for pages accessed via MMU such as
|
|
|
|
|
Kernel Virtual address or User Virtual Address)
|
|
|
|
|
TLB entries have a per-page Cache Enable Bit.
|
|
|
|
|
Note that Global I/D ENABLE + Per Page DISABLE works but corollary
|
|
|
|
|
Global DISABLE + Per Page ENABLE won't work
|
|
|
|
|
|
2013-05-09 20:24:51 +04:00
|
|
|
config ARC_CACHE_VIPT_ALIASING
|
|
|
|
|
bool "Support VIPT Aliasing D$"
|
2015-04-06 14:53:57 +03:00
|
|
|
depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
|
2013-05-09 20:24:51 +04:00
|
|
|
|
2019-03-11 16:57:59 +03:00
|
|
|
endif #ARC_CACHE
|
2013-01-18 13:42:20 +04:00
|
|
|
|
2013-01-18 13:42:25 +04:00
|
|
|
config ARC_HAS_ICCM
|
|
|
|
|
bool "Use ICCM"
|
|
|
|
|
help
|
|
|
|
|
Single Cycle RAMS to store Fast Path Code
|
|
|
|
|
|
|
|
|
|
config ARC_ICCM_SZ
|
|
|
|
|
int "ICCM Size in KB"
|
|
|
|
|
default "64"
|
|
|
|
|
depends on ARC_HAS_ICCM
|
|
|
|
|
|
|
|
|
|
config ARC_HAS_DCCM
|
|
|
|
|
bool "Use DCCM"
|
|
|
|
|
help
|
|
|
|
|
Single Cycle RAMS to store Fast Path Data
|
|
|
|
|
|
|
|
|
|
config ARC_DCCM_SZ
|
|
|
|
|
int "DCCM Size in KB"
|
|
|
|
|
default "64"
|
|
|
|
|
depends on ARC_HAS_DCCM
|
|
|
|
|
|
|
|
|
|
config ARC_DCCM_BASE
|
|
|
|
|
hex "DCCM map address"
|
|
|
|
|
default "0xA0000000"
|
|
|
|
|
depends on ARC_HAS_DCCM
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
choice
|
ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
|
|
|
prompt "MMU Version"
|
2013-01-18 13:42:20 +04:00
|
|
|
default ARC_MMU_V3 if ARC_CPU_770
|
|
|
|
|
default ARC_MMU_V2 if ARC_CPU_750D
|
2015-04-06 14:52:39 +03:00
|
|
|
default ARC_MMU_V4 if ARC_CPU_HS
|
2013-01-18 13:42:20 +04:00
|
|
|
|
2015-09-29 13:31:13 +03:00
|
|
|
if ISA_ARCOMPACT
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
config ARC_MMU_V1
|
|
|
|
|
bool "MMU v1"
|
|
|
|
|
help
|
|
|
|
|
Orig ARC700 MMU
|
|
|
|
|
|
|
|
|
|
config ARC_MMU_V2
|
|
|
|
|
bool "MMU v2"
|
|
|
|
|
help
|
2017-09-26 06:47:59 +03:00
|
|
|
Fixed the deficiency of v1 - possible thrashing in memcpy scenario
|
2013-01-18 13:42:20 +04:00
|
|
|
when 2 D-TLB and 1 I-TLB entries index into same 2way set.
|
|
|
|
|
|
|
|
|
|
config ARC_MMU_V3
|
|
|
|
|
bool "MMU v3"
|
|
|
|
|
depends on ARC_CPU_770
|
|
|
|
|
help
|
|
|
|
|
Introduced with ARC700 4.10: New Features
|
|
|
|
|
Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
|
|
|
|
|
Shared Address Spaces (SASID)
|
|
|
|
|
|
2015-09-29 13:31:13 +03:00
|
|
|
endif
|
|
|
|
|
|
2015-04-06 14:52:39 +03:00
|
|
|
config ARC_MMU_V4
|
|
|
|
|
bool "MMU v4"
|
|
|
|
|
depends on ISA_ARCV2
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
endchoice
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
choice
|
|
|
|
|
prompt "MMU Page Size"
|
|
|
|
|
default ARC_PAGE_SIZE_8K
|
|
|
|
|
|
|
|
|
|
config ARC_PAGE_SIZE_8K
|
|
|
|
|
bool "8KB"
|
|
|
|
|
help
|
|
|
|
|
Choose between 8k vs 16k
|
|
|
|
|
|
|
|
|
|
config ARC_PAGE_SIZE_16K
|
|
|
|
|
bool "16KB"
|
2015-07-16 21:45:17 +03:00
|
|
|
depends on ARC_MMU_V3 || ARC_MMU_V4
|
2013-01-18 13:42:20 +04:00
|
|
|
|
|
|
|
|
config ARC_PAGE_SIZE_4K
|
|
|
|
|
bool "4KB"
|
2015-07-16 21:45:17 +03:00
|
|
|
depends on ARC_MMU_V3 || ARC_MMU_V4
|
2013-01-18 13:42:20 +04:00
|
|
|
|
|
|
|
|
endchoice
|
|
|
|
|
|
2016-02-10 04:22:07 +03:00
|
|
|
choice
|
|
|
|
|
prompt "MMU Super Page Size"
|
|
|
|
|
depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
|
|
|
|
|
default ARC_HUGEPAGE_2M
|
|
|
|
|
|
|
|
|
|
config ARC_HUGEPAGE_2M
|
|
|
|
|
bool "2MB"
|
|
|
|
|
|
|
|
|
|
config ARC_HUGEPAGE_16M
|
|
|
|
|
bool "16MB"
|
|
|
|
|
|
|
|
|
|
endchoice
|
|
|
|
|
|
2016-04-18 08:19:56 +03:00
|
|
|
config NODES_SHIFT
|
|
|
|
|
int "Maximum NUMA Nodes (as a power of 2)"
|
2016-09-21 13:51:48 +03:00
|
|
|
default "0" if !DISCONTIGMEM
|
|
|
|
|
default "1" if DISCONTIGMEM
|
2016-04-18 08:19:56 +03:00
|
|
|
depends on NEED_MULTIPLE_NODES
|
|
|
|
|
---help---
|
|
|
|
|
Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
|
|
|
|
|
zones.
|
|
|
|
|
|
ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
|
|
|
if ISA_ARCOMPACT
|
|
|
|
|
|
2013-01-18 13:42:22 +04:00
|
|
|
config ARC_COMPACT_IRQ_LEVELS
|
2016-05-30 16:51:22 +03:00
|
|
|
bool "Setup Timer IRQ as high Priority"
|
2013-01-18 13:42:23 +04:00
|
|
|
# if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
|
2016-05-30 16:51:22 +03:00
|
|
|
depends on !SMP
|
2013-01-18 13:42:22 +04:00
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
config ARC_FPU_SAVE_RESTORE
|
|
|
|
|
bool "Enable FPU state persistence across context switch"
|
|
|
|
|
help
|
2017-09-26 06:47:59 +03:00
|
|
|
Double Precision Floating Point unit had dedicated regs which
|
2013-01-18 13:42:20 +04:00
|
|
|
need to be saved/restored across context-switch.
|
|
|
|
|
Note that ARC FPU is overly simplistic, unlike say x86, which has
|
|
|
|
|
hardware pieces to allow software to conditionally save/restore,
|
|
|
|
|
based on actual usage of FPU by a task. Thus our implemn does
|
|
|
|
|
this for all tasks in system.
|
|
|
|
|
|
2019-03-11 16:57:59 +03:00
|
|
|
endif #ISA_ARCOMPACT
|
ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
|
|
|
|
2013-03-30 13:37:47 +04:00
|
|
|
config ARC_CANT_LLSC
|
|
|
|
|
def_bool n
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
config ARC_HAS_LLSC
|
|
|
|
|
bool "Insn: LLOCK/SCOND (efficient atomic ops)"
|
|
|
|
|
default y
|
2015-06-26 10:12:53 +03:00
|
|
|
depends on !ARC_CANT_LLSC
|
2013-01-18 13:42:20 +04:00
|
|
|
|
|
|
|
|
config ARC_HAS_SWAPE
|
|
|
|
|
bool "Insn: SWAPE (endian-swap)"
|
|
|
|
|
default y
|
|
|
|
|
|
ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
|
|
|
if ISA_ARCV2
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|
|
|
|
|
2019-01-30 19:32:41 +03:00
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|
|
config ARC_USE_UNALIGNED_MEM_ACCESS
|
|
|
|
|
bool "Enable unaligned access in HW"
|
|
|
|
|
default y
|
|
|
|
|
select HAVE_EFFICIENT_UNALIGNED_ACCESS
|
|
|
|
|
help
|
|
|
|
|
The ARC HS architecture supports unaligned memory access
|
|
|
|
|
which is disabled by default. Enable unaligned access in
|
|
|
|
|
hardware and use software to use it
|
|
|
|
|
|
ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
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|
|
config ARC_HAS_LL64
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|
|
|
bool "Insn: 64bit LDD/STD"
|
|
|
|
|
help
|
|
|
|
|
Enable gcc to generate 64-bit load/store instructions
|
|
|
|
|
ISA mandates even/odd registers to allow encoding of two
|
|
|
|
|
dest operands with 2 possible source operands.
|
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|
|
default y
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|
|
2015-07-16 21:45:38 +03:00
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|
|
config ARC_HAS_DIV_REM
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|
|
bool "Insn: div, divu, rem, remu"
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|
|
|
default y
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|
|
|
2017-04-21 01:36:51 +03:00
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|
|
config ARC_HAS_ACCL_REGS
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|
|
bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
|
2018-07-18 01:21:56 +03:00
|
|
|
default y
|
2017-04-21 01:36:51 +03:00
|
|
|
help
|
|
|
|
|
Depending on the configuration, CPU can contain accumulator reg-pair
|
|
|
|
|
(also referred to as r58:r59). These can also be used by gcc as GPR so
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|
|
kernel needs to save/restore per process
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|
|
2018-06-06 20:20:37 +03:00
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|
|
config ARC_IRQ_NO_AUTOSAVE
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|
|
bool "Disable hardware autosave regfile on interrupts"
|
|
|
|
|
default n
|
|
|
|
|
help
|
|
|
|
|
On HS cores, taken interrupt auto saves the regfile on stack.
|
|
|
|
|
This is programmable and can be optionally disabled in which case
|
|
|
|
|
software INTERRUPT_PROLOGUE/EPILGUE do the needed work
|
|
|
|
|
|
2019-03-11 16:57:59 +03:00
|
|
|
endif # ISA_ARCV2
|
ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
endmenu # "ARC CPU Configuration"
|
|
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|
|
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|
|
|
|
config LINUX_LINK_BASE
|
2017-08-15 21:13:54 +03:00
|
|
|
hex "Kernel link address"
|
2013-01-18 13:42:20 +04:00
|
|
|
default "0x80000000"
|
|
|
|
|
help
|
|
|
|
|
ARC700 divides the 32 bit phy address space into two equal halves
|
|
|
|
|
-Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
|
|
|
|
|
-Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
|
|
|
|
|
Typically Linux kernel is linked at the start of untransalted addr,
|
|
|
|
|
hence the default value of 0x8zs.
|
|
|
|
|
However some customers have peripherals mapped at this addr, so
|
|
|
|
|
Linux needs to be scooted a bit.
|
|
|
|
|
If you don't know what the above means, leave this setting alone.
|
2015-12-15 11:27:16 +03:00
|
|
|
This needs to match memory start address specified in Device Tree
|
2013-01-18 13:42:20 +04:00
|
|
|
|
2017-08-15 21:13:54 +03:00
|
|
|
config LINUX_RAM_BASE
|
|
|
|
|
hex "RAM base address"
|
|
|
|
|
default LINUX_LINK_BASE
|
|
|
|
|
help
|
|
|
|
|
By default Linux is linked at base of RAM. However in some special
|
|
|
|
|
cases (such as HSDK), Linux can't be linked at start of DDR, hence
|
|
|
|
|
this option.
|
|
|
|
|
|
2015-03-09 16:23:49 +03:00
|
|
|
config HIGHMEM
|
|
|
|
|
bool "High Memory Support"
|
2016-05-31 09:16:47 +03:00
|
|
|
select ARCH_DISCONTIGMEM_ENABLE
|
2015-03-09 16:23:49 +03:00
|
|
|
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
|
|
|
|
|
in future
|
|
|
|
|
|
2015-02-06 18:44:57 +03:00
|
|
|
config ARC_HAS_PAE40
|
|
|
|
|
bool "Support for the 40-bit Physical Address Extension"
|
|
|
|
|
depends on ISA_ARCV2
|
2017-05-05 23:20:29 +03:00
|
|
|
select HIGHMEM
|
2018-04-03 17:24:20 +03:00
|
|
|
select PHYS_ADDR_T_64BIT
|
2015-02-06 18:44:57 +03:00
|
|
|
help
|
|
|
|
|
Enable access to physical memory beyond 4G, only supported on
|
|
|
|
|
ARC cores with 40 bit Physical Addressing support
|
|
|
|
|
|
2014-09-07 23:52:33 +04:00
|
|
|
config ARC_KVADDR_SIZE
|
2017-09-26 06:47:59 +03:00
|
|
|
int "Kernel Virtual Address Space size (MB)"
|
2014-09-07 23:52:33 +04:00
|
|
|
range 0 512
|
|
|
|
|
default "256"
|
|
|
|
|
help
|
|
|
|
|
The kernel address space is carved out of 256MB of translated address
|
|
|
|
|
space for catering to vmalloc, modules, pkmap, fixmap. This however may
|
|
|
|
|
not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
|
|
|
|
|
this to be stretched to 512 MB (by extending into the reserved
|
|
|
|
|
kernel-user gutter)
|
|
|
|
|
|
2013-02-11 18:22:57 +04:00
|
|
|
config ARC_CURR_IN_REG
|
|
|
|
|
bool "Dedicate Register r25 for current_task pointer"
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
This reserved Register R25 to point to Current Task in
|
|
|
|
|
kernel mode. This saves memory access for each such access
|
|
|
|
|
|
2013-01-23 15:00:36 +04:00
|
|
|
|
2014-09-08 09:48:15 +04:00
|
|
|
config ARC_EMUL_UNALIGNED
|
2013-01-23 15:00:36 +04:00
|
|
|
bool "Emulate unaligned memory access (userspace only)"
|
|
|
|
|
select SYSCTL_ARCH_UNALIGN_NO_WARN
|
|
|
|
|
select SYSCTL_ARCH_UNALIGN_ALLOW
|
ARCv2: Support for ARCv2 ISA and HS38x cores
The notable features are:
- SMP configurations of upto 4 cores with coherency
- Optional L2 Cache and IO-Coherency
- Revised Interrupt Architecture (multiple priorites, reg banks,
auto stack switch, auto regfile save/restore)
- MMUv4 (PIPT dcache, Huge Pages)
- Instructions for
* 64bit load/store: LDD, STD
* Hardware assisted divide/remainder: DIV, REM
* Function prologue/epilogue: ENTER_S, LEAVE_S
* IRQ enable/disable: CLRI, SETI
* pop count: FFS, FLS
* SETcc, BMSKN, XBFU...
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-05-13 17:00:41 +04:00
|
|
|
depends on ISA_ARCOMPACT
|
2013-01-23 15:00:36 +04:00
|
|
|
help
|
|
|
|
|
This enables misaligned 16 & 32 bit memory access from user space.
|
|
|
|
|
Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
|
|
|
|
|
potential bugs in code
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
config HZ
|
|
|
|
|
int "Timer Frequency"
|
|
|
|
|
default 100
|
|
|
|
|
|
2013-01-18 13:42:25 +04:00
|
|
|
config ARC_METAWARE_HLINK
|
|
|
|
|
bool "Support for Metaware debugger assisted Host access"
|
|
|
|
|
help
|
|
|
|
|
This options allows a Linux userland apps to directly access
|
|
|
|
|
host file system (open/creat/read/write etc) with help from
|
|
|
|
|
Metaware Debugger. This can come in handy for Linux-host communication
|
|
|
|
|
when there is no real usable peripheral such as EMAC.
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
menuconfig ARC_DBG
|
|
|
|
|
bool "ARC debugging"
|
|
|
|
|
default y
|
|
|
|
|
|
2014-11-07 08:15:28 +03:00
|
|
|
if ARC_DBG
|
|
|
|
|
|
2013-01-22 15:33:19 +04:00
|
|
|
config ARC_DW2_UNWIND
|
|
|
|
|
bool "Enable DWARF specific kernel stack unwind"
|
|
|
|
|
default y
|
|
|
|
|
select KALLSYMS
|
|
|
|
|
help
|
|
|
|
|
Compiles the kernel with DWARF unwind information and can be used
|
|
|
|
|
to get stack backtraces.
|
|
|
|
|
|
|
|
|
|
If you say Y here the resulting kernel image will be slightly larger
|
|
|
|
|
but not slower, and it will give very useful debugging information.
|
|
|
|
|
If you don't debug the kernel, you can say N, but we may not be able
|
|
|
|
|
to solve problems without frame unwind information
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
config ARC_DBG_TLB_PARANOIA
|
|
|
|
|
bool "Paranoia Checks in Low Level TLB Handlers"
|
|
|
|
|
|
2014-11-07 08:15:28 +03:00
|
|
|
endif
|
|
|
|
|
|
2013-01-22 15:30:52 +04:00
|
|
|
config ARC_BUILTIN_DTB_NAME
|
|
|
|
|
string "Built in DTB"
|
|
|
|
|
help
|
|
|
|
|
Set the name of the DTB to embed in the vmlinux binary
|
|
|
|
|
Leaving it blank selects the minimal "skeleton" dtb
|
|
|
|
|
|
2013-01-18 13:42:20 +04:00
|
|
|
endmenu # "ARC Architecture Configuration"
|
|
|
|
|
|
2016-02-10 04:22:07 +03:00
|
|
|
config FORCE_MAX_ZONEORDER
|
|
|
|
|
int "Maximum zone order"
|
|
|
|
|
default "12" if ARC_HUGEPAGE_16M
|
|
|
|
|
default "11"
|
|
|
|
|
|
2014-10-29 15:26:25 +03:00
|
|
|
source "kernel/power/Kconfig"
|
