BMC/Intel-BMC/linux.git/arch/arm/kernel/entry-v7m.S, branch dev-5.0

ARM: 8830/1: NOMMU: Toggle only bits in EXC_RETURN we are really care of

2019-04-05T20:34:45+00:00

[ Upstream commit 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 Signed-off-by: Russell King Signed-off-by: Sasha Levin

ARM: rename S_FRAME_SIZE to PT_REGS_SIZE

2016-06-22T18:54:28+00:00

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 Signed-off-by: Russell King

ARM: 8450/1: v7-M: Use ret_to_user_from_irq in PendSV handler

2015-11-16T18:34:37+00:00

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 Acked-by: Uwe Kleine-König Signed-off-by: Russell King

ARM: 8340/1: ARMv7-M: Enlarge vector table up to 256 entries

2015-05-08T09:42:21+00:00

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 Acked-by: Stefan Agner Tested-by: Chanwoo Choi Signed-off-by: Maxime Coquelin Signed-off-by: Russell King

ARM: 8295/1: fix v7M build for !CONFIG_PRINTK

2015-01-29T15:23:12+00:00

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 Signed-off-by: Russell King

ARM: 7890/1: v7-M: drop using mach/entry-macro.S

2013-12-29T12:32:32+00:00

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 Signed-off-by: Uwe Kleine-König Signed-off-by: Russell King

ARM: 7800/1: ARMv7-M: Fix name of NVIC handler function

2013-07-31T10:12:58+00:00

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 Signed-off-by: Russell King

ARM: ARMv7-M: Add support for exception handling

2013-04-17T19:44:46+00:00

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 Reviewed-by: Jonathan Austin Tested-by: Jonathan Austin Signed-off-by: Uwe Kleine-König