1. 02 Mar, 2020 2 commits
    • Robert Sprowson's avatar
      Add aligned RMA claim subreason · fd81a66c
      Robert Sprowson authored
      OS_Module
      => R0=24
         R3=size in bytes
         R4=alignment in bytes (must be a power of 2)
      <= R2=base of request
         or error
      Tested with a handful of valid and invalid alignments, and with one grossly larger than the free RMA to trigger an RMA extend to occur.
      
      Version 6.35. Tagged as 'Kernel-6_35'
      fd81a66c
    • ROOL's avatar
      Record various numbers used in other strands of RISC OS and compatible systems · 81b079e8
      ROOL authored
      Detail:
        * various low-numbered dynamic areas used by RISC OS 6 and Pyromaniac
        * OS_ReadSysInfo 8 host platform classes for VirtualRPC, A9Home, Pyromaniac
        * OS_Byte 0,<not 0> MosVer values for various systems since the BBC micro
        * OS_Byte 129,0,255 (BASIC INKEY -256) values for various RISC OS systems
      
      Admin:
        Discovered that these weren't really recorded anywhere during recent
        allocation request. Some information gleaned from http://beebwiki.mdfs.net
      
      Version 6.34. Not tagged
      81b079e8
  2. 27 Feb, 2020 2 commits
    • Jeffrey Lee's avatar
      Fix phantom DA PostGrow errors · 8c2cae4a
      Jeffrey Lee authored
      Dynamic area PostGrow handlers aren't able to return errors, so the V
      flag is likely undefined. Fix AreaGrow so that it ignores any V-set
      condition returned by the call (especially since the CallPostGrow rapper
      will have clobbered any error pointer).
      
      Fixes issue reported on forums:
      https://www.riscosopen.org/forum/forums/4/topics/14662
      
      Version 6.34. Tagged as 'Kernel-6_34'
      8c2cae4a
    • Robert Sprowson's avatar
      Assign a USB flag · 56230247
      Robert Sprowson authored
      The XHCIDriver module adds 64k to get the register address. In an attempt to phase this out (so the registers are the true base address), assign a flag so that loading a suitable XHCIDriver on an old HAL still works.
      
      Version 6.33. Not tagged
      56230247
  3. 12 Feb, 2020 1 commit
    • Jeffrey Lee's avatar
      Be more forgiving of GraphicsV init failures · e4a8bac2
      Jeffrey Lee authored
      * Update OS_ScreenMode 11's handling of drivers which fail to
      initialise. If there was no previous driver, then instead of trying to
      restore that nonexistant driver, stick with the new one. This is mainly
      to help with the case where the kernel's built in modes aren't accepted
      by the driver, and valid modes only become available once an MDF is
      loaded (this can happen with early OMAP3 chip revisions, which have very
      tight sync & porch limits, causing 90% of the kernel's modes to be
      rejected). If the kernel was to revert to the "no driver" state, then
      loading the MDF would still leave you with no video output.
      * Since we can now end up in a state where a driver is selected but
      hasn't been programmed yet, update OS_Byte 19 to detect this (via the
      magic ScreenBlankDPMSState value of 255) and avoid waiting for VSync
      * Update RemovePages & InsertRemovePagesExit (screen DA handlers) to
      avoid infinite loops if the screen DA gets shrunk to zero size (was seen
      while attempting to complete the !Boot sequence while no driver was
      active)
      
      Version 6.33. Tagged as 'Kernel-6_33'
      e4a8bac2
  4. 19 Jan, 2020 1 commit
    • Timothy E Baldwin's avatar
      Fix *Dump on (apparently) empty files. · b4b52fa1
      Timothy E Baldwin authored
      Special case for empty files was crashing, fix by removing
      which also supports files which report a size of zero but
      actually contain data such as Unix device nodes and
      Linux procfs.
      
      Error where start outside file adjusted to permit a start
      exactly at the end of a file to permit (apparently) empty
      files with no output. Doing likewise for non-empty files
      is consistent.
      
      Also fix closing file in case of error reading GS format
      from CMOS.
      
      Version 6.32. Tagged as 'Kernel-6_32'
      b4b52fa1
  5. 18 Jan, 2020 1 commit
    • Jeffrey Lee's avatar
      Fix OS_DynamicArea 21 handling of MaxCamEntry · 5f7b9b37
      Jeffrey Lee authored
      OS_DynamicArea 21 was treating MaxCamEntry as if it was the exclusive
      upper bound, when really it's the inclusive bound. The consequence of
      this was that PMPs were unable to explicitly claim the highest-numbered
      RAM page in the system.
      
      Version 6.31. Tagged as 'Kernel-6_31'
      5f7b9b37
  6. 24 Nov, 2019 3 commits
    • Timothy E Baldwin's avatar
      Permit special field in paths passed to OS_CLI · 2ec9e04e
      Timothy E Baldwin authored
      OS_CLI permits commands to be prefixed with a temporary filing
      system, for example "ADFS:Format"
      
      It also passes commands unrecognised to FileSwitch to be executed,
      so "ADFS::HardDisc4.$.!Boot" first sets the temporary filing to
      ADFS then executes ":HardDisc4.$.!Boot".
      
      This does not work if the path contains a special field,
      currently this results in an error as the special filed
      would be lost.
      
      Unfortunately many programs, including the RISC OS source
      fail because of this.
      
      Instead if a filing system prefix with special field
      is found switch to the Temporary filing system and
      treat the whole command as a path to execute. For example
      passing "IXFS#W:$.HardDisc4.!Boot" sets the temporary filing
      system to "IXFS" then executes "IXFS#W:$.HardDisc4.!Boot".
      
      Version 6.30. Tagged as 'Kernel-6_30'
      2ec9e04e
    • Jeffrey Lee's avatar
      Add OS_DynamicArea 27+28, for supporting lots of RAM · 9224a6ca
      Jeffrey Lee authored
      OS_DynamicArea 27 is the same as OS_DynamicArea 5 ("return free
      memory"), except the result is measured in pages instead of bytes,
      allowing it to behave sensibly on machines with many gigabytes of RAM.
      
      Similarly, OS_DynamicArea 28 is the same as OS_DynamicArea 7 (internal
      DA enumeration call used by TaskManager), except the returned size
      values are measured in pages instead of bytes. A flags word has also
      been added to allow for more expansion in the future.
      
      Hdr:OSMem now also contains some more definitions which external code
      will find useful.
      
      Version 6.29. Tagged as 'Kernel-6_29'
      9224a6ca
    • Robert Sprowson's avatar
      Add GENET to the list of HAL devices · a5db413c
      Robert Sprowson authored
      Version 6.28. Not tagged
      a5db413c
  7. 19 Nov, 2019 2 commits
    • Jeffrey Lee's avatar
      Allow reservation of memory pages · 1f84ad9f
      Jeffrey Lee authored
      This change adds a new OS_Memory reason code, 23, for reserving memory
      without actually assigning it to a dynamic area. Other dynamic areas can
      still use the memory, but only the code that reserved it will be allowed
      to claim exclusive use over it (i.e. PageFlags_Unavailable).
      
      This is useful for systems such as the PCI heap, where physically
      contiguous memory is required, but the memory isn't needed all of the
      time. By reserving the pages, it allows other regular DAs to make use of
      the memory when the PCI heap is small. But when the PCI heap needs to
      grow, it guarantees that (if there's enough free memory in the system)
      the previously reserved pages can be allocated to the PCI heap.
      
      Notes:
      
      * Reservations are handled on an honour system; there's no checking that
      the program that reserved the memory is the one attempting to map it in.
      
      * For regular NeedsSpecificPages DAs, reserved pages can only be used if
      the special "RESV" R0 return value is used.
      
      * For PMP DAs, reserved pages can only be made Unavailable if the entry
      in the page block also specifies the Reserved page flag. The actual
      state of the Reserved flag can't be modified via PMP DA ops, the flag is
      only used to indicate the caller's permission/intent to make the page
      Unavailable.
      
      * If a PMP DA tries to make a Reserved page Unavailable without
      specifying the Reserved flag, the kernel will try to swap it out for a
      replacement page taken from the free pool (preserving the contents and
      generating Service_PagesUnsafe / Service_PagesSafe, as if another DA
      had claimed the page)
      
      Version 6.28. Tagged as 'Kernel-6_28'
      1f84ad9f
    • Timothy E Baldwin's avatar
      Remove some obsolete definitions for clarity · a52c5049
      Timothy E Baldwin authored
       * MinAplWork isn't used.
       * SuperMode isn't used and is less well known than "SWI OS_EnterOS".
       * MEMCADR is now only a magic value returned by OS_UpdateMEMC,
         so it is clearer to include it literally with comment.
      
      Added a comment to explain the baffling combination of
      the MEMC1 control register's address with it's value.
      
      
      Version 6.27. Not tagged
      a52c5049
  8. 09 Nov, 2019 1 commit
  9. 05 Nov, 2019 1 commit
  10. 20 Oct, 2019 2 commits
  11. 30 Sep, 2019 1 commit
    • Jeffrey Lee's avatar
      Allow runtime adjustment of AplWorkMaxSize · 0aeea07f
      Jeffrey Lee authored
      Detail:
      This adds a new OS_DynamicArea reason code, 26, for adjusting
      AplWorkMaxSize at runtime. This allows compatibility tools such as
      Aemulor to adjust the limit without resorting to patching the kernel.
      Any adjustment made to the value will affect the upper limit of
      application space, and the lower limit of dynamic area placement.
      Attempting to adjust beyond the compile-time upper/default limit, or
      such that it will interfere with existing dynamic areas / wimpslots,
      will result in an error.
      
      Relevant forum thread:
      https://www.riscosopen.org/forum/forums/11/topics/14734
      
      Admin:
      Tested on BB-xM, desktop active & inactive
      
      Version 6.24. Tagged as 'Kernel-6_24'
      0aeea07f
  12. 21 Sep, 2019 1 commit
    • Jeffrey Lee's avatar
      Fix a couple of RISCOS_MapInIO bugs · 0ee90f05
      Jeffrey Lee authored
      Detail:
      
      - s/HAL - Fix ADD v. SUB muddle that could prevent addresses from being rounded down correctly. Fix incorrect logical address being returned to caller on pre-ARMv6 machines due to PageTableSync corrupting a1.
      - s/NewReset - Initialising the CMOS RAM cache while in the middle of setting up the processor vectors feels a bit silly. Move the code to just afterwards so that it feels a bit safer, and so that early crashes are easier to debug (processor vectors in stable state)
      
      Admin:
      
      Tested on Iyonix.
      Fixes ROM softload failure reported on forums:
      https://www.riscosopen.org/forum/forums/11/topics/14749
      
      Version 6.23. Tagged as 'Kernel-6_23'
      0ee90f05
  13. 16 Aug, 2019 1 commit
    • Ben Avison's avatar
      Support supersection-mapped memory in OS_Memory 24 · bd294cf9
      Ben Avison authored
      To achieve this:
      * DecodeL1Entry and DecodeL2Entry return 64-bit physical addresses in
        r0 and r1, with additional return values shuffled up to r2 and r3
      * DecodeL1Entry now returns the section size, so callers can distinguish
        section- from supersection-mapped memory
      * PhysAddrToPageNo now accepts a 64-bit address (though since the physical
        RAM table is currently still all 32-bit, it will report any top-word-set
        addresses as being not in RAM)
      
      Version 6.22. Tagged as 'Kernel-6_22'
      bd294cf9
  14. 29 Jun, 2019 1 commit
    • Robert Sprowson's avatar
      Move former ControlList_Interlaced item into SyncPol flags · b3b95b4b
      Robert Sprowson authored
      ControlList_Interlaced is taken to have meant "output interlaced sync on H/V" and "configure DMA to show alternate lines in the framestore on alternate fields", therefore SyncPol flags mean:
      b43
       00 = 'normal' progressive scan
       01 = interlaced sync, but both fields show the same image
       10 = (invalid)
       11 = interlaced sync, fields use alternate lines from the image
      
      Version 6.21. Tagged as 'Kernel-6_21'
      b3b95b4b
  15. 23 Jun, 2019 1 commit
  16. 24 Feb, 2019 1 commit
    • Jeffrey Lee's avatar
      Don't pointlessly doubly-map external framestores · e604b89c
      Jeffrey Lee authored
      Detail:
        s/vdu/vdudriver - When mapping external framestores, only double-map them if the driver supports hardware scrolling. Avoids wasting IO address space, and reduces IO space fragmentation if the framestore address changes
      Admin:
        Tested on Raspberry Pi 3
      
      
      Version 6.19. Tagged as 'Kernel-6_19'
      e604b89c
  17. 20 Jan, 2019 1 commit
    • Jeffrey Lee's avatar
      Palette/gamma optimisations · 831e1d94
      Jeffrey Lee authored
      Detail:
        s/vdu/vdupalxx:
        - Fix conditional code sequence in PV_BulkWrite which meant that the greyscale palette flag was being recalculated when the border or pointer colour was changed.
        - Change PV_1stFlashState / PV_2ndFlashState to act as NOPs in true colour modes, which helps to avoid regular redundant gamma table updates (due to the flashing colour logic in the VSync handler).
      Admin:
        Tested on Raspberry Pi 3
      
      
      Version 6.18. Tagged as 'Kernel-6_18'
      831e1d94
  18. 29 Nov, 2018 1 commit
    • Jeffrey Lee's avatar
      Service_ModeExtension tweak + docs update · 1b15fced
      Jeffrey Lee authored
      Detail:
        s/vdu/legacymodes - Make the Service_ModeExtension implementation automatically use ExtraBytes to request that the row length is a multiple of a word (since things fail with non-word aligned rows)
        hdr/VIDCList - Un-deprecate SyncPol bits 2 & 3 and improve the comments to indicate the difference between SyncPol interlace and control list interlace
      Admin:
        Tested on BB-xM
      
      
      Version 6.17. Tagged as 'Kernel-6_17'
      1b15fced
  19. 19 Nov, 2018 1 commit
    • Jeffrey Lee's avatar
      Fix FindOKMode not recovering properly from unsupported VIDC lists · 6f366d87
      Jeffrey Lee authored
      Detail:
        s/vdu/vduswis - Fix 18 year old register corruption bug in FindOKMode which would prevent it from falling back to Service_ModeTranslation if Service_ModeExtension returned a VIDC list but the VIDC list was rejected by the GraphicsV driver
        s/vdu/vdudriver - Also, change a couple of error cases in ModeChangeSub so that they use the "Screen mode not available" error instead of the incorrect "Not enough screen memory" error.
      Admin:
        Tested on Raspberry Pi 3
        Fixes issue reported on forums where if AnyMode is loaded, numbered modes in unsupported colour depths weren't being replaced with substitutes (although note that there are still some AnyMode-related issues to resolve)
        https://www.riscosopen.org/forum/forums/4/topics/12773
      
      
      Version 6.16. Tagged as 'Kernel-6_16'
      6f366d87
  20. 14 Nov, 2018 1 commit
    • Jeffrey Lee's avatar
      Fix dodgy ranged ICache cleans when using ARMv7MP ARMops · b3c64d93
      Jeffrey Lee authored
      Detail:
        s/ARMops - If the ICacheInvalidate macro was told to pull a2, it would pull it before invoking ICache_InvalidateRange, causing the end address of the range to be lost. Avoid this by only pulling the registers after the ranged call.
        Also optimise MMU_ChangingEntry to go straight to ICache_InvalidateRange instead of doing a redundant range size check.
      Admin:
        Tested on OMAP5
        Potentially fixes lockup/long stall seen when using PhotoDesk, reported by Willi Theiss
      
      
      Version 6.15. Tagged as 'Kernel-6_15'
      b3c64d93
  21. 07 Nov, 2018 1 commit
    • Jeffrey Lee's avatar
      Attempt to tidy up substitute screen mode selection logic · d87c22a4
      Jeffrey Lee authored
      Detail:
        Over the years the OS's substitute screen mode selection logic has grown to be a tangled mess, and the logic it does implement isn't always very useful. Additionally, the kernel is structured in such a way that it can be hard for modules to override it.
        This set of changes aims to fix the many of the problems, by doing the following:
        - Moving all substitute mode selection logic out of the core VDU driver code and into a Service_ModeTranslation handler. This means you now only have one place in the kernel to look instead of several, and modules can override the behaviour by claiming/blocking the service call as appropriate.
        - Moving handling of the built-in VIDC lists out of the core VDU driver code and into a Service_ModeExtension handler. This means programs can now inspect these VIDC lists by issuing the right service call (although you are essentially limited to lists which the GraphicsV driver is OK with)
        - Moving *TV interlace & offset adjustment logic into the Service_ModeExtension handler, since they're legacy things which can be handled more cleanly for MDF/EDID (and the old code was poking memory the kernel didn't own)
        - Adding a Service_EnumerateScreenModes implementation, so that if you end up in the desktop with ScreenModes non-functional, the display manager at least has something useful to show you
        - Enhancing the handling of the built-in numbered modes so that they are now available in any colour depth; the Service_ModeExtension handler (and related handlers) treat the builtin VIDC lists as a set of mode timings, not a discrete set of modes
        - Substitute mode selection logic is a complete re-write. Instead of trying a handful of numbered fallback modes, it now tries:
          - Same mode but at higher colour depths
          - Same mode but at lower colour depths
          - Alternate resolutions (half-width mode with no double-pixel if original request was for double-pixel, and default resolution for monitor type)
        - Combined with the logic to allow the builtin VIDC lists to be used at any colour depth, this means that the kernel should now be able to find substitute modes for machines which lack support for <=8bpp modes (e.g. OMAP5)
        - Additionally the mode substitution code will attempt to retain as many properties of the originally requested mode as possible (eigen values, gap mode type, etc.)
        Other improvements:
        - The kernel now actually vets the builtin VIDC lists instead of assuming that they'll work (which also means they'll have the correct ExtraBytes value, where applicable)
        - The kernel now uses GraphicsV 19 (VetMode2) to vet the mode during the mode switch process, using the result to detect where the framebuffer will be placed. This allows for GraphicsV drivers to switch between DA 2 and external framestores on a per-mode basis.
        - The kernel now supports mode selectors which specify LineLength values which are larger than necessary; this will get translated to a suitable ExtraBytes control list item (+ combined with whatever padding the driver indicates is necessary via the VetMode2 result)
        File changes:
        - hdr/KernelWS - Reserve space for a VIDC list, since the Service_ModeExtension implementation typically can't use the built-in list as-is
        - s/Arthur3 - Issue Service_ModeFileChanged when the configured monitor type is changed, so that DisplayManager + friends are aware that the set of available modes has changed
        - s/GetAll - Fiddle with GETs a bit
        - s/MemMap2 - Extra LTORG
        - s/NewIRQs - Small routine to install/uninstall false VSync routine (previously from PushModeInfo, which wasn't really the appropriate place for it)
        - s/Utility - Hook up the extra service call handlers
        - s/vdu/legacymodes - New file containing the new service call implementations, and some related code
        - s/vdu/vdudecl - Move mode workspace definition here, from vdumodes
        - s/vdu/vdudriver - Remove assorted bits of mode substitution code. Plug in new bits for calling GraphicsV 19 during mode set, and deal with ExtraBytes/LineLength during PushModeInfo
        - s/vdu/vdumodes - Move some workspace definitions to s/vdu/vdudecl. Tweak how the builtin VIDC lists are stored.
        - s/vdu/vduswis - Rip out more mode substitution code. Issue Service_ModeFileChanged when monitor type is changed by OS_ScreenMode.
      Admin:
        Tested on Raspberry Pi 3, Iyonix, IGEPv5
      
      
      Version 6.14. Tagged as 'Kernel-6_14'
      d87c22a4
  22. 16 Sep, 2018 1 commit
    • Jeffrey Lee's avatar
      Improve detection of invalid/unsupported screen modes · 6eb6c11e
      Jeffrey Lee authored
      Detail:
        s/vdu/vdudriver - When using mode selector blocks, don't allow the system to switch into double-vertical, double-pixel, or BBC-gap modes which are in colour depths unsupported by the kernel
      Admin:
        Tested on BB-xM
      
      
      Version 6.13. Tagged as 'Kernel-6_13'
      6eb6c11e
  23. 04 Aug, 2018 1 commit
    • Jeffrey Lee's avatar
      Fix OS_Hardware 3 to be re-entrant · 6f9f922b
      Jeffrey Lee authored
      Detail:
        s/HAL - OS_Hardware 3 (remove HAL device) will now re-scan the device list for the device following the Service_Hardware call, so that the device list won't become corrupt if the service call triggers addition/removal of devices.
      Admin:
        Tested on iMX6
        *HDMIOff now correctly removes the HDMI audio device and SoundDMA's software mixer device (SoundDMA removes mixer in response to the HDMI audio device vanishing, but re-entrancy bug meant that the HDMI device was left on the list)
        Note that this only covers re-entrancy via Service_Hardware. OS_Hardware 2/3/4/5 are not re-entrant from other locations (e.g. IRQ handlers or memory allocation service calls).
      
      
      Version 6.12. Tagged as 'Kernel-6_12'
      6f9f922b
  24. 14 Jul, 2018 1 commit
    • Jeffrey Lee's avatar
      Evict ECFIndex and PalIndex from VDU workspace · bcc668c7
      Jeffrey Lee authored
      Detail:
        ECFIndex and PalIndex claim to be mode variables, but it's impossible for extension modes to specify their values.
        Since they're easy to calculate from the ModeFlags and Log2BPP values, drop them from the mode workspace (+ table of builtin modes) and calculate them on the fly instead.
        File changes:
        - hdr/KernelWS - Drop ECFIndex & PalIndex from workspace
        - s/vdu/vdumodes - Adjust workspace definition, drop ECFIndex & PalIndex values from VWSTAB
        - s/vdu/vdudriver - Remove now-redundant copy loop from ModeChangeSub. Remove code from GenerateModeSelectorVars that sets up the ECFIndex & PalIndex values on the stack
        - s/vdu/vdugrafl - Adjust copy loop in SwitchOutputToSprite/Mask
        - s/vdu/vdupalette, s/vdu/vdupalxx - Add GetPalIndex routine to generate PalIndex on the fly. Drop the obsolete 16bpp palette/gamma table and shuffle the other entries to simplify GetPalIndex a bit.
        - s/vdu/vduplot - Add GetECFIndex routine to generate ECFIndex on the fly. Also, fix things so that mode 0 isn't the only rectangular-pixel mode which uses the special rectangular-pixel ECF patterns (index 0 vs. index 4). Fiddle with ExportedHLine a bit to avoid an out-of-range ADR.
        - s/NewReset - Fix UAL warning for MOV R0, AppSpaceStart. Adjust memset to not assume 512KB is the correct amount
      Admin:
        Tested on Raspberry Pi 3
      
      
      Version 6.11. Tagged as 'Kernel-6_11'
      bcc668c7
  25. 08 Jul, 2018 1 commit
    • Jeffrey Lee's avatar
      Fix OS_Memory 0 "make temporarily uncacheable" not reporting errors · c5569c81
      Jeffrey Lee authored
      Detail:
        s/MemInfo - The wrapper around OS_Memory 0 introduced in Kernel-5_35-4_79_2_311 was preserving the wrong PSR field on exit, causing any error generated by the core code to be lost.
      Admin:
        Tested on Iyonix
        Fixes *screensave saving mostly white pixels (address translation for "external" VRAM should have failed and caused ADFS to fall back to a bounce buffer)
        Is also likely to be the cause of https://www.riscosopen.org/forum/forums/5/topics/11713 (address translation should have failed for soft ROM)
      
      
      Version 6.10. Tagged as 'Kernel-6_10'
      c5569c81
  26. 07 Jul, 2018 1 commit
  27. 30 Jun, 2018 1 commit
    • ROOL's avatar
      Simplify initial AplSpace claim · 526764e1
      ROOL authored
      Detail:
        As the application slot is now a normal dynamic area, there's no need to manipulate the CAM directly. Convert FudgeSomeAppSpace into a OS_ChangeDynamicArea SWI followed by memset().
        ChangeDyn.s: Offset by 32k to account for the -32k that dynamic area -1 has.
        NewReset.s: Delete FudgeSomeAppSpace and replace as above.
      Admin:
        Submission from Timothy Baldwin.
      
      Version 6.08. Tagged as 'Kernel-6_08'
      526764e1
  28. 16 Jun, 2018 1 commit
    • ROOL's avatar
      Various kernel cleanups · bcbd3602
      ROOL authored
      Detail:
        NewReset.s: Remove warning about soft reset, this is not supported any longer
        MsgCode.s: Reload LR after potentially changing mode
        PMF/osinit.s: Delete vestiges of soft reset support
      Admin:
        Submission from Timothy Baldwin.
      
      Version 6.07. Tagged as 'Kernel-6_07'
      bcbd3602
  29. 31 May, 2018 1 commit
    • Jeffrey Lee's avatar
      Update mode variable definitions · 7e7901c8
      Jeffrey Lee authored
      Detail:
        hdr/VduExt:
        - Introduce mode variable 13, for specifying the minimum number of screen banks that are guaranteed to be available. Eventually the kernel will make use of this during mode vetting & selection, to give programs a simple and reliable way of selecting banked screen modes. Currently however it's only supported by VideoOverlay and the corresponding GraphicsV overlay APIs.
        - Extend the mode flags to allow display rotation & flipping to be specified. This is used to indicate that the framebuffer accessed by the CPU is not in the same orientation as what the user is seeing. Again, currently this is only supported by VideoOverlay and the corresponding GraphicsV overlay APIs.
      Admin:
        Tested on OMAP3, OMAP4
      
      
      Version 6.06. Tagged as 'Kernel-6_06'
      7e7901c8
  30. 13 May, 2018 1 commit
  31. 24 Apr, 2018 1 commit
    • Jeffrey Lee's avatar
      Disable error block validity checks · 3c60aa69
      Jeffrey Lee authored
      Detail:
        The error block checks introduced in Kernel-5_35-4_79_2_313 are generating a few too many false positives and edge cases, so take the safe option of just disabling them rather than trying to tweak the rules further. Error pointers will still be checked, but the content of the error blocks will not.
        hdr/Options - Add CheckErrorBlocks switch so we can easily turn the code back on again in the future if necessary
        s/Kernel - Switch out all the code relating to error number checks, except for the dummy load of the first word of the error block, since that's still useful as a pointer validity check
        hdr/KernelWS - Revise SWIDespatch_Size definition so it's easier for it to cope with the various factors which may affect the despatcher size
      Admin:
        Tested on PandaBoard
        Relevant discussion:
        https://www.riscosopen.org/forum/forums/11/topics/11133
      
      
      Version 6.04. Tagged as 'Kernel-6_04'
      3c60aa69
  32. 19 Apr, 2018 1 commit
  33. 15 Apr, 2018 2 commits
    • Robert Sprowson's avatar
      Back to odd numbered development · 38d3d82a
      Robert Sprowson authored
      Version 6.02. Tagged as 'Kernel-6_02'
      38d3d82a
    • Ben Avison's avatar
      Resync with allocations database · cc37d347
      Ben Avison authored
      Detail:
        Resolve allocation clash for vector &2C.  It appears that RISCOS Ltd used
        this vector in RISC OS 6 without getting it allocated - they really should
        have known better, since Hdr:RISCOS has always one of the header files
        centrally managed and coordinated between the two forks of RISC OS.
        Resolved by moving SeriousErrorV to &2D since it is a relatively recent
        addition (April 2016) and hasn't yet featured in a stable RISC OS 5
        release.
        Also correct some comments elsewhere in Hdr:RISCOS.
      
      
      Version 6.01. Tagged as 'Kernel-6_01'
      cc37d347