linux-stable.git/arch/arc/kernel/head.S, branch v4.4.232 Linux kernel stable tree ARCv2: Enable unaligned access in early ASM code 2019-03-23T07:44:18+00:00 Eugeniy Paltsev Eugeniy.Paltsev@synopsys.com 2019-01-16T11:29:50+00:00 2c2433eba19a9762ff8d151777f6fd5774b5bff4 commit 252f6e8eae909bc075a1b1e3b9efb095ae4c0b56 upstream. It is currently done in arc_init_IRQ() which might be too late considering gcc 7.3.1 onwards (GNU 2018.03) generates unaligned memory accesses by default Cc: stable@vger.kernel.org #4.4+ Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> [vgupta: rewrote changelog] Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 252f6e8eae909bc075a1b1e3b9efb095ae4c0b56 upstream.

It is currently done in arc_init_IRQ() which might be too late
considering gcc 7.3.1 onwards (GNU 2018.03) generates unaligned
memory accesses by default

Cc: stable@vger.kernel.org #4.4+
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: rewrote changelog]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARC: boot: Non Master cpus only need to call EARLY_CPU_SETUP once 2015-10-28T10:43:42+00:00 Vineet Gupta vgupta@synopsys.com 2015-10-15T15:02:39+00:00 483bcc99c0a349570b30fc9cb20dea20c9387a4b With prev fixes, all cores now start via common entry point @stext which already calls EARLY_CPU_SETUP for all cores - so no need to invoke it again Signed-off-by: Vineet Gupta <vgupta@synopsys.com> 
With prev fixes, all cores now start via common entry point @stext which
already calls EARLY_CPU_SETUP for all cores - so no need to invoke it
again

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARC: boot: Support Halt-on-reset and Run-on-reset SMP booting modes 2015-10-28T10:38:17+00:00 Vineet Gupta vgupta@synopsys.com 2015-10-09T05:56:12+00:00 3971cdc202f638f252e39316d42492ace04cc1b1 For Run-on-reset, non masters need to spin wait. For Halt-on-reset they can jump to entry point directly. Also while at it, made reset vector handler as "the" entry point for kernel including host debugger based boot (which uses the ELF header entry point) Signed-off-by: Vineet Gupta <vgupta@synopsys.com> 
For Run-on-reset, non masters need to spin wait. For Halt-on-reset they
can jump to entry point directly.

Also while at it, made reset vector handler as "the" entry point for
kernel including host debugger based boot (which uses the ELF header
entry point)

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARCv2: Support for ARCv2 ISA and HS38x cores 2015-06-22T08:36:55+00:00 Vineet Gupta vgupta@synopsys.com 2013-05-13T13:00:41+00:00 1f6ccfff6314672743ad7252160654709e997a2a 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> 
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>
ARC: explicit'ify uboot support 2015-06-19T12:39:27+00:00 Vineet Gupta vgupta@synopsys.com 2015-03-09T14:10:09+00:00 036b2c5664281e7da5a89c9f742491f30966485f Signed-off-by: Vineet Gupta <vgupta@synopsys.com> 
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARC: RIP @running_on_hw 2014-10-13T09:16:17+00:00 Vineet Gupta vgupta@synopsys.com 2014-09-10T05:08:10+00:00 435abb6daf310b4c1d681097887ea7239c310732 * No active users of this flag anymore * flag itself was no longer usable with new simualtor which acts just like hardware, not providing the special chip-id = 0xffff which good old ISS used to do. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> 
* No active users of this flag anymore

* flag itself was no longer usable with new simualtor which acts just like
  hardware, not providing the special chip-id = 0xffff which good old
  ISS used to do.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARC: optimize kernel bss clearing in early boot code 2014-06-26T04:44:05+00:00 Vineet Gupta vgupta@synopsys.com 2014-04-17T11:43:26+00:00 bef444a33004f4062930df1fc703a25dd6d7b460 using ARC ZOL which reduces tot num of instructions by half Signed-off-by: Vineet Gupta <vgupta@synopsys.com> 
using ARC ZOL which reduces tot num of instructions by half

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARC: Disable caches in early boot if so configured 2014-06-03T09:44:48+00:00 Vineet Gupta vgupta@synopsys.com 2014-03-07T12:38:11+00:00 ef680cdc24376f394841a3f19b3a7ef6d57a009d Requested-by: Noam Camus <noamc@ezchip.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> 
Requested-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARC: [SMP] General Fixes 2014-04-05T09:16:42+00:00 Vineet Gupta vgupta@synopsys.com 2014-02-24T03:42:50+00:00 c3441edd2dea83923421fd6050d2ffdc57696323 -Pass the expected arg to non-boot park'ing routine (It worked so far because existing SMP backends don't use the arg) -CONFIG_DEBUG_PREEMPT warning 
-Pass the expected arg to non-boot park'ing routine
 (It worked so far because existing SMP backends don't use the arg)

-CONFIG_DEBUG_PREEMPT warning
ARC: [cmdline] uboot cmdline handling rework 2014-01-16T13:19:38+00:00 Vineet Gupta vgupta@synopsys.com 2014-01-16T09:31:24+00:00 59ed9413533897823bcdb4c79fd2904718e25b0a * Moved cmdline copy from asm to "C" - allows for more robust checking of pointer validity etc. * Remove the Kconfig option to do so, base it on a runtime value passed by u-boot Signed-off-by: Vineet Gupta <vgupta@synopsys.com> 
* Moved cmdline copy from asm to "C" - allows for more robust checking
  of pointer validity etc.

* Remove the Kconfig option to do so, base it on a runtime value passed
  by u-boot

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>