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zephyr/arch/arc/core/mpu/Kconfig

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arch: arc: Add mpu support * add arc mpu driver * modify the corresponding kconfig and kbuild * currently only em_starterkit 2.2's em7d configuration has mpu feature (mpu version 2) * as the minimum region size of arc mpu version 2 is 2048 bytes and region size should be power of 2, the stack size of threads (including main thread and idle thread) should be at least 2048 bytes and power of 2 * for mpu stack guard feature, a stack guard region of 2048 bytes is generated. This brings more memory footprint * For arc mpu version 3, the minimum region size is 32 bytes. * the codes are tested by the mpu_stack_guard_test and stackprot Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-15 12:20:42 +08:00
# Kconfig - Memory Protection Unit (MPU) configuration options
#
# Copyright (c) 2017 Synopsys
#
# SPDX-License-Identifier: Apache-2.0
#
config ARC_MPU_VER
int
prompt "ARC MPU version"
range 2 4
default 2
help
kconfig: fix help syntax and add spaces Signed-off-by: Anas Nashif <anas.nashif@intel.com>
2017-12-13 23:08:21 +08:00
ARC MPU has several versions. For MPU v2, the minimum region is 2048 bytes;
For MPU v3, the minimum region is 32 bytes
arch: arc: Add mpu support * add arc mpu driver * modify the corresponding kconfig and kbuild * currently only em_starterkit 2.2's em7d configuration has mpu feature (mpu version 2) * as the minimum region size of arc mpu version 2 is 2048 bytes and region size should be power of 2, the stack size of threads (including main thread and idle thread) should be at least 2048 bytes and power of 2 * for mpu stack guard feature, a stack guard region of 2048 bytes is generated. This brings more memory footprint * For arc mpu version 3, the minimum region size is 32 bytes. * the codes are tested by the mpu_stack_guard_test and stackprot Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-15 12:20:42 +08:00
config ARC_CORE_MPU
bool "ARC Core MPU functionalities"
depends on CPU_HAS_MPU
help
arch: arc: apply STACK_GUARD_SIZE and optimize the mpu driver * apply STACK_GUARD_SIZE, no extra space will be added if MPU_STACK_GUARD is disabled * When ARC_STACK_CHECKING is enabled, MPU_STACK_GUARD will be disabled * add two new api: arc_core_mpu_default and arc_core_mpu_region to configure mpu regions * improve arc_core_mpu_enable and arc_core_mpu_disable Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-16 16:59:54 +08:00
ARC core MPU functionalities
arch: arc: Add mpu support * add arc mpu driver * modify the corresponding kconfig and kbuild * currently only em_starterkit 2.2's em7d configuration has mpu feature (mpu version 2) * as the minimum region size of arc mpu version 2 is 2048 bytes and region size should be power of 2, the stack size of threads (including main thread and idle thread) should be at least 2048 bytes and power of 2 * for mpu stack guard feature, a stack guard region of 2048 bytes is generated. This brings more memory footprint * For arc mpu version 3, the minimum region size is 32 bytes. * the codes are tested by the mpu_stack_guard_test and stackprot Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-15 12:20:42 +08:00
config MPU_STACK_GUARD
bool "Thread Stack Guards"
arch: arc: apply STACK_GUARD_SIZE and optimize the mpu driver * apply STACK_GUARD_SIZE, no extra space will be added if MPU_STACK_GUARD is disabled * When ARC_STACK_CHECKING is enabled, MPU_STACK_GUARD will be disabled * add two new api: arc_core_mpu_default and arc_core_mpu_region to configure mpu regions * improve arc_core_mpu_enable and arc_core_mpu_disable Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-16 16:59:54 +08:00
depends on ARC_CORE_MPU && !ARC_STACK_CHECKING
arch: arc: Add mpu support * add arc mpu driver * modify the corresponding kconfig and kbuild * currently only em_starterkit 2.2's em7d configuration has mpu feature (mpu version 2) * as the minimum region size of arc mpu version 2 is 2048 bytes and region size should be power of 2, the stack size of threads (including main thread and idle thread) should be at least 2048 bytes and power of 2 * for mpu stack guard feature, a stack guard region of 2048 bytes is generated. This brings more memory footprint * For arc mpu version 3, the minimum region size is 32 bytes. * the codes are tested by the mpu_stack_guard_test and stackprot Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-15 12:20:42 +08:00
help
arch: arc: apply STACK_GUARD_SIZE and optimize the mpu driver * apply STACK_GUARD_SIZE, no extra space will be added if MPU_STACK_GUARD is disabled * When ARC_STACK_CHECKING is enabled, MPU_STACK_GUARD will be disabled * add two new api: arc_core_mpu_default and arc_core_mpu_region to configure mpu regions * improve arc_core_mpu_enable and arc_core_mpu_disable Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-16 16:59:54 +08:00
Enable thread stack guards via MPU. ARC supports built-in stack protection.
doc: fix misspellings and missing EOF newlines Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
2017-08-17 05:16:02 +08:00
If your core supports that, it is preferred over MPU stack guard
arch: arc: Add mpu support * add arc mpu driver * modify the corresponding kconfig and kbuild * currently only em_starterkit 2.2's em7d configuration has mpu feature (mpu version 2) * as the minimum region size of arc mpu version 2 is 2048 bytes and region size should be power of 2, the stack size of threads (including main thread and idle thread) should be at least 2048 bytes and power of 2 * for mpu stack guard feature, a stack guard region of 2048 bytes is generated. This brings more memory footprint * For arc mpu version 3, the minimum region size is 32 bytes. * the codes are tested by the mpu_stack_guard_test and stackprot Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-15 12:20:42 +08:00
config ARC_MPU
bool "ARC MPU Support"
depends on CPU_HAS_MPU
select ARC_CORE_MPU
arch: arc: modify the kconfig for mpu case * user space support requires THREAD_INFO * for MPU version 2, the stack align is at least 2048 bytes * the smallest mpu region is 2048 bytes * the region size must bt power of 2 * the start address of region must be aligned to the region size Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2018-02-01 16:36:47 +08:00
select THREAD_STACK_INFO
arch: arc: MPUv2 enables MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT enable MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT for ARC MPU v2 Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2018-02-12 19:29:54 +08:00
select MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT if ARC_MPU_VER = 2
arch: arc: Add mpu support * add arc mpu driver * modify the corresponding kconfig and kbuild * currently only em_starterkit 2.2's em7d configuration has mpu feature (mpu version 2) * as the minimum region size of arc mpu version 2 is 2048 bytes and region size should be power of 2, the stack size of threads (including main thread and idle thread) should be at least 2048 bytes and power of 2 * for mpu stack guard feature, a stack guard region of 2048 bytes is generated. This brings more memory footprint * For arc mpu version 3, the minimum region size is 32 bytes. * the codes are tested by the mpu_stack_guard_test and stackprot Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-08-15 12:20:42 +08:00
help
arch: arc: add the support of MPU version 3 MPU version 3 is included in em7d of em_starterkit 2.3. The differences of MPU version 3 and version 2 are: * different aux reg interface * The address alignment requirement is 32 bytes * supports secure mode * supports SID (option) * does not support memory region overlap This commit adds the support MPU version 3 and also make some changes to MPU version 2 to have an unified interface. Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2017-11-29 17:42:00 +08:00
Target has ARC MPU (currently only works for EMSK 2.2/2.3 ARCEM7D)