linux.git/arch/arm/kernel/entry-v7m.S, branch v5.8 Linux kernel source tree treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19T15:09:55+00:00 Thomas Gleixner tglx@linutronix.de 2019-06-04T08:11:33+00:00 d2912cb15bdda8ba4a5dd73396ad62641af2f520 Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: 8830/1: NOMMU: Toggle only bits in EXC_RETURN we are really care of 2019-02-01T21:44:19+00:00 Vladimir Murzin vladimir.murzin@arm.com 2019-01-25T14:18:37+00:00 72cd4064fccaae15ab84d40d4be23667402df4ed ARMv8M introduces support for Security extension to M class, among other things it affects exception handling, especially, encoding of EXC_RETURN. The new bits have been added: Bit [6] Secure or Non-secure stack Bit [5] Default callee register stacking Bit [0] Exception Secure which conflicts with hard-coded value of EXC_RETURN: In fact, we only care of few bits: Bit [3] Mode (0 - Handler, 1 - Thread) Bit [2] Stack pointer selection (0 - Main, 1 - Process) We can toggle only those bits and left other bits as they were on exception entry. It is basically, what patch does - saves EXC_RETURN when we do transition form Thread to Handler mode (it is first svc), so later saved value is used instead of EXC_RET_THREADMODE_PROCESSSTACK. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> 
ARMv8M introduces support for Security extension to M class, among
other things it affects exception handling, especially, encoding of
EXC_RETURN.

The new bits have been added:

Bit [6]	Secure or Non-secure stack
Bit [5]	Default callee register stacking
Bit [0]	Exception Secure

which conflicts with hard-coded value of EXC_RETURN:

In fact, we only care of few bits:

Bit [3]	 Mode (0 - Handler, 1 - Thread)
Bit [2]	 Stack pointer selection (0 - Main, 1 - Process)

We can toggle only those bits and left other bits as they were on
exception entry.

It is basically, what patch does - saves EXC_RETURN when we do
transition form Thread to Handler mode (it is first svc), so later
saved value is used instead of EXC_RET_THREADMODE_PROCESSSTACK.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
ARM: rename S_FRAME_SIZE to PT_REGS_SIZE 2016-06-22T18:54:28+00:00 Russell King rmk+kernel@armlinux.org.uk 2016-05-10T15:34:27+00:00 5745eef6b813194b4dd3e2aee1dd712d8512bf91 S_FRAME_SIZE is no longer the size of the kernel stack frame, so this name is misleading. It is the size of the kernel pt_regs structure. Name it so. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> 
S_FRAME_SIZE is no longer the size of the kernel stack frame, so this
name is misleading.  It is the size of the kernel pt_regs structure.
Name it so.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
ARM: 8450/1: v7-M: Use ret_to_user_from_irq in PendSV handler 2015-11-16T18:34:37+00:00 Ezequiel Garcia ezequiel@vanguardiasur.com.ar 2015-10-30T20:08:05+00:00 440ee365d30adbcd9a97fba9cd629cedb7e9b7cb The PendSV handler calls v7m_exception_entry which disables IRQs. Therefore, since IRQs are already disabled, the PendSV handler can return using ret_to_user_from_irq. Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The PendSV handler calls v7m_exception_entry which
disables IRQs. Therefore, since IRQs are already disabled,
the PendSV handler can return using ret_to_user_from_irq.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 8340/1: ARMv7-M: Enlarge vector table up to 256 entries 2015-05-08T09:42:21+00:00 Maxime Coquelin stm32 mcoquelin.stm32@gmail.com 2015-04-10T08:46:46+00:00 6b1814cde5c79c6aa4d02c9aedc14a709c2c0737 From Cortex-M reference manuals, the nvic supports up to 240 interrupts. So the number of entries in vectors table is up to 256. This patch adds a new config flag to specify the number of external interrupts. Some ifdeferies are added in order to respect the natural alignment without wasting too much space on smaller systems. Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Stefan Agner <stefan@agner.ch> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
From Cortex-M reference manuals, the nvic supports up to 240 interrupts.
So the number of entries in vectors table is up to 256.

This patch adds a new config flag to specify the number of external interrupts.
Some ifdeferies are added in order to respect the natural alignment without
wasting too much space on smaller systems.

Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Stefan Agner <stefan@agner.ch>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 8295/1: fix v7M build for !CONFIG_PRINTK 2015-01-29T15:23:12+00:00 Rob Herring r.herring@freescale.com 2015-01-28T15:05:04+00:00 ed46092518aaed9e5266f8dd87ac12bf18cfc8e8 Minimal builds for v7M are broken when printk is disabled. The caller is assembly so add the necessary ifdef around the call. Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Minimal builds for v7M are broken when printk is disabled. The caller is
assembly so add the necessary ifdef around the call.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 7890/1: v7-M: drop using mach/entry-macro.S 2013-12-29T12:32:32+00:00 Uwe Kleine-König u.kleine-koenig@pengutronix.de 2013-11-14T10:45:59+00:00 e6d159cdf9f79edd1738bd1f3b430226fe3924ae The only v7-M platform only has some unused stubs in its mach/entry-macro.S file. So don't include it which allows efm32 to drop the file. Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The only v7-M platform only has some unused stubs in its
mach/entry-macro.S file. So don't include it which allows efm32 to drop
the file.

Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 7800/1: ARMv7-M: Fix name of NVIC handler function 2013-07-31T10:12:58+00:00 Uwe Kleine-König u.kleine-koenig@pengutronix.de 2013-07-30T10:33:00+00:00 bed859c1eea89feaba2acbb57d967a6d6f68af09 The name changed in response to review comments for the nvic irqchip driver when the original name was already accepted into Russell King's tree. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The name changed in response to review comments for the nvic irqchip
driver when the original name was already accepted into Russell King's
tree.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: ARMv7-M: Add support for exception handling 2013-04-17T19:44:46+00:00 Uwe Kleine-König u.kleine-koenig@pengutronix.de 2010-05-21T17:06:42+00:00 19c4d593f0b4bd46f6d923a3e514719982a22058 This patch implements the exception handling for the ARMv7-M architecture (pretty different from the A or R profiles). It bases on work done earlier by Catalin for 2.6.33 but was nearly completely rewritten to use a pt_regs layout compatible to the A profile. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Jonathan Austin <jonathan.austin@arm.com> Tested-by: Jonathan Austin <jonathan.austin@arm.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 
This patch implements the exception handling for the ARMv7-M
architecture (pretty different from the A or R profiles).

It bases on work done earlier by Catalin for 2.6.33 but was nearly
completely rewritten to use a pt_regs layout compatible to the A
profile.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Jonathan Austin <jonathan.austin@arm.com>
Tested-by: Jonathan Austin <jonathan.austin@arm.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>