This provides memory mappings with the ability to be initialized in their
paged-out state and be paged in on demand. This is especially nice for
anonymous memory mappings as they no longer have to allocate all memory
at mem_map time. This also allows for file mappings to be implemented by
simply providing backing store location tokens.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
This is part of a series to move memory management functions
away from the z_ namespace and into its own namespace. Also
make documentation available via doxygen.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
Sometimes the generic address range checker is not adequate
(think Xtensa cached/uncached pointers). This provides a way
to implement custom memory range checkers for those
situations. When enabled, sys_mm_is_phys_addr_in_range()
and sys_mm_is_virt_addr_in_range() must be implemented.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
Many RTOS applications assume the virtual and physical address
is 1:1 mapping, so add the 1:1 mapping support in z_phys_map()
to easy adapt these applications.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
According to Kconfig guidelines, boolean prompts must not start with
"Enable...". The following command has been used to automate the changes
in this patch:
sed -i "s/bool \"[Ee]nables\? \(\w\)/bool \"\U\1/g" **/Kconfig*
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Introduce a hidden kconfig CONFIG_KERNEL_VM_SUPPORT which
enables some kconfigs that are required for virtual memory
support. CONFIG_KERNEL_VM_BASE, CONFIG_KERNEL_VM_OFFSET,
and CONFIG_KERNEL_VM_SIZE are moved under this new kconfig
so these can be enabled independent of CONFIG_MMU.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This moves CONFIG_MMU and its children from arch/Kconfig into
kernel/Kconfig. These are used to enable kernel support of MMU
so they should be under kernel/.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
Nicolas Pitre