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Support for GOARCH=mips64 #8

Merged
merged 45 commits into from
Jul 11, 2024
Merged

Support for GOARCH=mips64 #8

merged 45 commits into from
Jul 11, 2024

Commits on Jun 23, 2024

  1. First steps for mips support

    @clktmr
    clktmr committed Jun 23, 2024
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  2. move entry function to beginning of text section

    @clktmr
    clktmr committed Jun 23, 2024
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  3. Implement _rt0_mips64_noos and rt0_go

    @clktmr
    clktmr committed Jun 23, 2024
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  4. First draft for interrupt handler 

    Saving, restoring context and switching to the ISR goroutine (cpu0.gh)
seems to work so far.  Only syscalls and interrupts are handled so far.
See TODOs for next steps.
    @clktmr
    clktmr committed Jun 23, 2024
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  5. rework implementation of inthandler

    @clktmr
    clktmr committed Jun 23, 2024
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  6. Save a few cycles in creg access

    @clktmr
    clktmr committed Jun 23, 2024
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  7. Use SW interrupts for signaling newwork() 

    The COMPARE register was only used because of a bug in MAME which
doesn't exist anymore in newer versions.  Moreover this implementation
could result in a deadlock because the scheduler also sets this
register.
    @clktmr
    clktmr committed Jun 23, 2024
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  8. Simple default write for debugging

    @clktmr
    clktmr committed Jun 23, 2024
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  9. Support user interrupt vectors

    @clktmr
    clktmr committed Jun 23, 2024
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  10. Fix hardware interrupt handler 

    Don't call the scheduler and enable exceptions in the user handler, it
might call the scheduler.
    @clktmr
    clktmr committed Jun 23, 2024
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  11. Refactor inthandler in preparation for nested IRQ 

    This commit breaks external interrupt handling.  Will be fixed in the
next one.
    @clktmr
    clktmr committed Jun 23, 2024
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  12. Reimplement context saving for external irqs

    @clktmr
    clktmr committed Jun 23, 2024
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  13. Fix save/restoreGPRs by including R23

    @clktmr
    clktmr committed Jun 23, 2024
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  14. Save and restore status register

    @clktmr
    clktmr committed Jun 23, 2024
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  15. Remove broken setAlarm() implementation

    @clktmr
    clktmr committed Jun 23, 2024
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  16. Mitigate sign-extended pointers with TLB

    @clktmr
    clktmr committed Jun 23, 2024
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  17. Don't allow preempting the scheduler for now

    @clktmr
    clktmr committed Jun 23, 2024
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  18. Fix CP0 hazards of ERET

    @clktmr
    clktmr committed Jun 23, 2024
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  19. Declare interrupt handler in go files

    @clktmr
    clktmr committed Jun 23, 2024
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  20. Fix instruction for accessing boolean variable

    @clktmr
    clktmr committed Jun 23, 2024
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Commits on Jun 30, 2024

  1. Increase space for non-heap allocations

    @clktmr
    clktmr committed Jun 30, 2024
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  2. Add dependency to target specific machine package

    @clktmr
    clktmr committed Jun 30, 2024
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  3. Remove incorrect uncached memory accesses 

    Before clearing the memory via uncached access, all cache must be
invalidated before.  Otherwise a cache writeback could happen after
clearing the memory.
    @clktmr
    clktmr committed Jun 30, 2024
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  4. Use Go register notation

    @clktmr
    clktmr committed Jun 30, 2024
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  5. Implement meminit in Go instead of assembly

    @clktmr
    clktmr committed Jun 30, 2024
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  6. Cleanup asm_mips64.h

    @clktmr
    clktmr committed Jun 30, 2024
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  7. Allow target specific unhandled exception handler

    @clktmr
    clktmr committed Jun 30, 2024
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  8. Cleanup tasker implementation

    @clktmr
    clktmr committed Jun 30, 2024
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  9. Use only one of the two SW interrupts

    @clktmr
    clktmr committed Jun 30, 2024
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  10. Consistent naming

    @clktmr
    clktmr committed Jun 30, 2024
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  11. Rework nested exceptions

    @clktmr
    clktmr committed Jun 30, 2024
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  12. Handle fast syscalls properly

    @clktmr
    clktmr committed Jun 30, 2024
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  13. Improve documentation

    @clktmr
    clktmr committed Jun 30, 2024
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  14. Make context restoration preemptable if possbile

    @clktmr
    clktmr committed Jun 30, 2024
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  15. Remove unreachable code

    @clktmr
    clktmr committed Jun 30, 2024
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  16. Allow nesting only for external interrupts 

    The implementation of softwareInterruptHandler can't support nesting, as
it must call the scheduler.
    @clktmr
    clktmr committed Jun 30, 2024
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  17. Initialize cpu to not use any ISA extensions

    @clktmr
    clktmr committed Jun 30, 2024
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  18. Remove dependency to n64 module

    @clktmr
    clktmr committed Jun 30, 2024
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  19. Fix errors reported by ./all.bash

    @clktmr
    clktmr committed Jun 30, 2024
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  20. Fix FPU context save in external interrupt 

    Regarding the TODO comment: Yes, newwork is set by another CPU.  Doesn't
matter at the moment, since only one core is supported.
    @clktmr
    clktmr committed Jun 30, 2024
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  21. Make function declarations arch dependent 

    This allows other archs to implement these in Go instead of assembly.
    @clktmr
    clktmr committed Jun 30, 2024
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  22. Implement cachemaint syscall

    @clktmr
    clktmr committed Jun 30, 2024
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  23. Implement irqctl syscall

    @clktmr
    clktmr committed Jun 30, 2024
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  24. Resolve minor review findings 

    See embeddedgo#8
    @clktmr
    clktmr committed Jun 30, 2024
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  25. Fix meminit() and other minor review findings

    @clktmr
    clktmr committed Jun 30, 2024
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