| Commit message (Collapse) | Author | Age |
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Removed old iterations of the project and moved the files from 02-usart
to the root directory since that's the sole place where the action is
and that subproject has outgrown its initial title.
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Before this fix, hfree would neglect to set the prev pointer in the next
used block and such was leaving the prev pointers invalid after
coalescing frees.
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What was in core/ is now moved to arch/stm34l4xxx/peripherals. This new
directory is *supposed to* to contain raw header files defining just the
pertinent register structures for the various peripherals. Peripheral
management belongs somewhere in the new `kern/..` directories. This is
not completely the case at the moment, so more refactoring needs to be
done.
What was sitting in the root has now been moved into the kern/
directory. The kern/ directory is to contain everything else
other than raw device register definitions. The root of the kern/
tree is reserved for standard library-esque headers.
The kern/<peripheral> directory contains management systems for that
peripheral. (At the moment DMA is the only peripheral with a decent
management system.) Preferably these peripheral systems should only
include their correlating header in arch/stm34l4xxx/peripherals, and
use other management systems for handling other peripherals rather
than manipulating their raw registers directly. (Though this ideal
will require much more critical mass of management systems.)
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The new halloc() call allocates memory on the
STM32l's SRAM2 starting right above the DATA
section.
The implementation uses a very-dense, albeit slower, linked-list
allocation as opposed to fancy B-trees or something. However, the
overhead is just 1 32-bit word per allocation and thus allows for
reasonably dense memory-packing on the small 16K memory chip.
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subdirectory.
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