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  1. 18 Jun, 2001 1 commit
    • Mike Stephens's avatar
      Reimplement enhancements to kernel Dynamic Area support from · 3f877936
      Mike Stephens authored 
      Ursula. Quite a hairy code merge really, so let's hope it is
worth it to someone. What you get (back after 2 or 3 years):
- much more efficient for largish numbers of DAs (relevance
  to current build = approx 0)
- fancy reason codes to support fast update of
  Switcher bar display (relevance = 0)
- support for clamped maximum area sizes, to avoid address
  space exhaustion with big memory (relevance = 0)
- better implementation of shrinkable DAs, performance
  wise (if lots of DAs, relevance = approx 0)
- support for 'Sparse' DAs. Holey dynamic areas, Batman!
  (relevance, go on someone use the darned things)
Moderately development tested on HAL/32bit ARM9 desktop.
Note the Switcher should be compiled to use the new
reason codes 6&7, for fabled desktop builds.

Also, during this work, so I could see the wood for the
trees, redid some source code clean up, removing pre-Medusa
stuff (like I did about 3 years ago on Ursula, sigh). That's
why loads of source files have changed. The new DA stuff
is confined pretty much to hdr.KernelWS and s.ChangeDyn.

Ta.

Version 5.35, 4.79.2.38. Tagged as 'Kernel-5_35-4_79_2_38'
      3f877936
  3. 15 Jun, 2001 1 commit
    • Mike Stephens's avatar
      Merge in long command line support from Ursula kernel. · 8727ebaa
      Mike Stephens authored 
      Look for LongCommandLine flag, command line size currently
set at 1k.
For HAL/32bit builds, the kernel buffer space is at high
(top bit set) address, which may break some code using signed
comparisons. So *beware* that there may be some latent
bugs in old kernel code using these buffers, not yet found.
One such bug, in s.Arthur2 found and fixed.
Tested moderately on ARM9 desktop build.
Lovely to reimplement things I did two and half years ago.

Version 5.35, 4.79.2.37. Tagged as 'Kernel-5_35-4_79_2_37'
      8727ebaa
  5. 13 Jun, 2001 1 commit
    • Mike Stephens's avatar
      Changes to Lazy task swapping to support abort handler in abort mode (now that we can count to 32). · a0f4966c
      Mike Stephens authored 
      LazyFixup now ensures all app pages are mapped in before handing
on a real (no-lazy) abort. This allows an abort handler in app
space itself, without scrambling the details of the original
abort (via a lazy abort in abort mode).
Many a happy minute spent coding and testing for recursive
aborts and fixups, but lets just pretend it doesn't happen
shall we.
Tested with simple popbang code on ARM9 desktop build.

Version 5.35, 4.79.2.36. Tagged as 'Kernel-5_35-4_79_2_36'
      a0f4966c
  7. 11 Jun, 2001 1 commit
  9. 06 Jun, 2001 1 commit
    • Mike Stephens's avatar
      Further work on Lazy task swapping: · ae287104
      Mike Stephens authored 
        hooks to give correct mapping info for OS_Memory 0
  same for OS_ReadMemMapEntries
  same for OS_FindMemMapEntries
  Lazy fixup routine no longer assumes an abort in current
  app space must be a truant page. However, work in this
  area not complete (no support yet for abort handler code
  in app space itself, eg. for C trampoline)
Good to know this will be a big performance boost when
our products use one monolithic application (sarcasm).
Ta

Version 5.35, 4.79.2.32. Tagged as 'Kernel-5_35-4_79_2_32'
      ae287104
  11. 22 May, 2001 1 commit
    • Mike Stephens's avatar
      Reimplement Lazy task swapping, an amusing idea from Ursula, would have done... · bdc4f843
      Mike Stephens authored 
      Reimplement Lazy task swapping, an amusing idea from Ursula, would have done it sooner but couldn't be bothered (humour).

Currently activates for all ARMs flagged as base-restored
abort model. No handling of eg. StrongARM pre-revT bug, but
then the kernel no longer runs on StrongARM (progress).
Still some details to fix: all aborts in current app space
assumed to be missing pages, but this must be fixed to
handle abort code in app space, things like debuggers
marking code read only.

Plus, small fixes:
  OS_Memory 8 returns vaguely useful info for RAM,VRAM
  in HAL build (temporary partial implementation)
  Broken handling of old BBC commands with (fx,tv etc)
  with no spaces fixed (fudgeulike code from Ursula,
  now 32-bit).

Version 5.35, 4.79.2.31. Tagged as 'Kernel-5_35-4_79_2_31'
      bdc4f843
  13. 17 May, 2001 1 commit
    • Kevin Bracey's avatar
      * Fixed the IIC code. · 390c26e8
      Kevin Bracey authored 
      * Kernel puts sensible default FIQ handler in through the HAL.
* Fix to temporary page uncaching code.

Version 5.35, 4.79.2.30. Tagged as 'Kernel-5_35-4_79_2_30'
      390c26e8
  15. 01 May, 2001 1 commit
  17. 20 Apr, 2001 1 commit
  19. 11 Apr, 2001 1 commit
  21. 19 Mar, 2001 1 commit
  23. 16 Mar, 2001 1 commit
  25. 08 Mar, 2001 1 commit
    • Kevin Bracey's avatar
      Added some missing IIC and USB files. · 9d13b691
      Kevin Bracey authored 
      An attempt to do NVMemory by using part of the Flash that the OS is sitting
in for Customer L. Programming algorithm works, but I'm not confident that the
Kernel does the right thing yet.

Version 5.35, 4.79.2.19. Tagged as 'Kernel-5_35-4_79_2_19'
      9d13b691
  27. 07 Mar, 2001 1 commit
  29. 01 Mar, 2001 1 commit
  31. 13 Feb, 2001 1 commit
  33. 25 Jan, 2001 1 commit
  35. 23 Jan, 2001 3 commits
  37. 12 Jan, 2001 1 commit
    • Mike Stephens's avatar
      kernel now attempts to substitute video mode numbers in face of h/w with... · 6a293f53
      Mike Stephens authored 
      kernel now attempts to substitute video mode numbers in face of h/w with limited bits-per-pixel support (not tested yet)

HAL_API document added - early draft only, of interest to those
writing or modifying HALs for new h/w
ARMop_API document added - early draft only, of interest only
to those modifying kernel to support new ARM cores
*** polite comments on HAL_API welcome ***

Version 5.35, 4.79.2.15. Tagged as 'Kernel-5_35-4_79_2_15'
      6a293f53
  39. 09 Jan, 2001 1 commit
  41. 10 Nov, 2000 2 commits
  43. 23 Oct, 2000 1 commit
  45. 20 Oct, 2000 2 commits
  47. 17 Oct, 2000 1 commit
  49. 16 Oct, 2000 3 commits
  51. 10 Oct, 2000 2 commits
  53. 09 Oct, 2000 1 commit
  55. 06 Oct, 2000 1 commit
  57. 05 Oct, 2000 5 commits