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Put the global object tables in separate page pairs. |
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Relocated the global object table regions to reside on page boundaries. |
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Attempted to simplify region allocation by putting the object table copy in a |
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Attempt to provide memory mapping to the lower memory object table. |
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Used the linker script symbol correctly. |
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Avoid the task entry routine if ASID is zero. |
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Added missing stack pointer initialisation to invoke_task. |
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Make sure that the task entry routine gets used after direct mapping updates. |
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Merged set_task into invoke_task, making sure that the ASID becomes set. |
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Produce a steady display of the value in plot_value. |
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Introduced a special routine that is used to enter the task. |
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Invoke task 1 and only switch between tasks 1 and 2. |
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Added task invocation support and the invocation of task zero. |
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Adjusted the value-plotting pattern and the test pattern arguments. |
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Adjusted colour value calculations. |
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Added simple value display, merging the pixel type with the pattern to show the |
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Separated the pixel-setting operations from the text pixel functions. |
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Consolidated task initialisation code. |
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Tidied instruction usage, signatures, and improved a variable comment. |
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Fixed restoration of floating point registers. |
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Properly reset the TLB mappings. |
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Moved the task management and the example task into separate files. |
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Introduced convenience headers for configuration-related file selection. |
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Renamed board-specific.h to init.h. |
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Moved board-specific timer operations to the appropriate files. |
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Allow task zero to plot a pattern and to run with the other tasks. |
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Moved paging definitions into a new header file, adjusting the table address. |
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Switched to using stacks accessible via the same virtual address region. |
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Switched to mapped stack regions, keeping stack pointers within their regions. |
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Added missing multiplication registers to loading and storing. |
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Added explicit clearing of TLB mappings. |
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Fixed page table indexing in the TLB miss handler. |
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Introduced kernel regions for task register storage. |
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Removed superfluous TLB mapping entry. |
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Put the page tables and the stacks in unmapped space, with the stacks occupying |
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Tidied up stack location calculations. |
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Added a generic exception handler to handle TLB misses during exceptions. |
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Minor formatting changes. |
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Fixed absent EPC initialisation. |
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Permit different test patterns. |
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Masking interrupts should not be necessary. |
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Introduced more immediate TLB miss handling in order to avoid stack usage and |
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Added a potentially useful TLB page miss mapping function. |
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Introduced a method of invoking task routines for testing. |
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Added elements of a task switching mechanism. |
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Introduced the start of a more complicated page mapping scheme. |
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Separated error level and interrupt initialisation. |
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Added missing ASID sections to EntryHi register values. |
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Moved status register saving and adjustment, saving the unmodified value. |
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Make a copy of the global offset table for user mode use. |
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Attempt to prevent a system hang by saving certain registers early. |
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Ensure that the GP is set up appropriately for interrupt and TLB miss handling. |
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Disable user mode transitions for now. |
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Fixed the operation of the enter_user_mode function. |
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Merged changes from the branch upon reverting to position-independent code. |
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Switched to position-independent code to enable user mode execution. |
stage2-non-pic |
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Pass parameters to the plot_pattern function. |
stage2-non-pic |
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Merged fixes. |
stage2-non-pic |
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Fixed initial TLB mapping. |
stage2-non-pic |
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Moved tlb_handle into the interrupt handling file. Added an idle wait loop. |
stage2-non-pic |
