Hi,
ARM core changes to support !MMU Kernel on v7-A MMU processors. This
series also does the preparation for CONFIG_VECTORS_BASE removal.
Based on the feedback from Russell, it was decided to handle vector
base dynamically in C for no-MMU & work towards the the goal of
removing VECTORS_BASE from Kconfig. MMU platform's always have
exception base address at 0xffff0000, hence a macro was defined and
it was decoupled from Kconfig. No-MMU CP15 scenario is handled
dynamically in C. Once vector region setup, used by Cortex-R, is
made devoid of VECTORS_BASE, it can be removed from Kconfig.
This series has been verified over current mainline plus [2] on
Vybrid Cosmic+, Cortex-M4 - !MMU Kernel and Cortex-A5 - MMU Kernel.
This series also has been verified over Vladimir's series plus [2] on
1. Vybrid Cosmic+
a. Cortex-M4 !MMU Kernel
b. Cortex-A5 MMU Kernel
c. Cortex-A5 !MMU Kernel
2. AM437x IDK
a. Cortex-A9 MMU Kernel
b. Cortex-A9 !MMU Kernel
Regards
afzal
v2:
=> Fix bisectability issue on !MMU builds
=> UL suffix on VECTORS_BASE definition
=> Use existing helpers to detect security extensions
=> Rewrite a CPP step to C for readability
[1] "[RFC v2 PATCH 00/23] Allow NOMMU for MULTIPLATFORM",
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-November/470966.html
(git://linux-arm.org/linux-vm.git nommu-rfc-v2)
[2] "[PATCH 1/2] ARM: nommu: allow enabling REMAP_VECTORS_TO_RAM"
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-December/473593.html
(in -next)
afzal mohammed (4):
ARM: mmu: decouple VECTORS_BASE from Kconfig
ARM: nommu: dynamic exception base address setting
ARM: nommu: display vectors base
ARM: nommu: remove Hivecs configuration is asm
arch/arm/include/asm/memory.h | 2 ++
arch/arm/kernel/head-nommu.S | 5 ----
arch/arm/mach-berlin/platsmp.c | 3 ++-
arch/arm/mm/dump.c | 5 ++--
arch/arm/mm/init.c | 9 ++++++--
arch/arm/mm/mm.h | 5 ++--
arch/arm/mm/nommu.c | 52 ++++++++++++++++++++++++++++++++++++++++--
7 files changed, 67 insertions(+), 14 deletions(-)
--
2.11.0
