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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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This commit adds a virtual memory range queue to the process descriptor
in order to keep track of mapped pages and free their respective frames
upon program exit.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Use the OSMORA kernel configuration framework to add options for L5Lunos
to parse during early startup.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Introduce lazy allocation in the vm_map() function. When passing a zero
value to any of the base address fields of the map spec, allocate our
own memory.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Place a guard page at the end of every mapping to catch overflows before
they start corrupting the system.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Introduce a machine independent mechanism to map multiple pages through
the new vm_map() function
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Lunos's virtual memory system is split into two parts, the machine
dependent MMU layer and the machine independent layer. The MMU side
exposes a standard bridge header that allows the MI layer to interface
with the MD layer.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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This commit implements an interface to allow other parts of Lunos to
talk to the MMU:
- Added the 'vas' structure as the virtual address space
- Added MMU specific prot flags
- Added mmu_map_single() to map pages
- Added mmu_this_vas() to grab the current VAS
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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