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… now should be initialization of VM state in boot.c, an implementation of mpu_enable_subregion, and integration with the m0FaultDispatch library's hardfault-with-context handler
… now should be initialization of VM state in boot.c, an implementation of mpu_enable_subregion, and integration with the m0FaultDispatch library's hardfault-with-context handler
…clude rich logging for unhandled exceptions
…auses the user program to re-execute the faulting instruction; also fixed lack of an error value for pte_group_index_t
…llocatable * begin updating create_system_resources to use vm; still in-progress * add a TODO for vm system init * get rid of unused panic macros * add extra parens to macros in vm.h with arguments for safety
* use correct size when initializing group tables * modify context switch assembly to do vm management (MPU protections, fault in stack before attempting to pop from it) * fix incorrect index <-> address conversion macros * fix incorrect initialization of PTEs when pages are first allocated * fix incorrect page fault copy-in size * updated outdated comments
…o single-byte writes + other awful compiler behavior
…o hardware registers the wrong way
…how to make it cleaner -- things in
… end the struggle with bitfields once and for all (hopefully?) -- source now faults in upon context switch to the user program, but there's more debugging left to do
… blinking! sleep_ms or timer_hw write from user program seems to cause problems
…run concurrently from the same address range in SRAM!
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This will be a draft PR until I add a feature flag to enable/disable VM