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Support 32MB system RAM configurations#82

Merged
ljsebald merged 6 commits intoKallistiOS:masterfrom
darcagn:32mb-mk4
Jan 3, 2023
Merged

Support 32MB system RAM configurations#82
ljsebald merged 6 commits intoKallistiOS:masterfrom
darcagn:32mb-mk4

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@darcagn darcagn commented Jan 2, 2023

Patches introduce

  • Check in startup.s to determine if 32MB system RAM is present, and if so, set up stack appropriately
  • _arch_mem_top variable representing top of memory, along with related kernel tweaks and macros
  • Example memory-testing program demonstrating use of new 32MB features
  • Patches for GCC 4.7.4 and 9.3.0 (including Apple Silicon patch) supporting stack changes
  • Patches for GCC 4.7.4 and 9.3.0 adding builtin defines KOS_GCC_PATCHED, KOS_GCC_PATCHLEVEL, and KOS_GCC_32MB.

Thanks go to

  • tsowell for discovering how to add 32MB to Dreamcast consoles and for original AMX3 patch
  • GyroVorbis for his invaluable assistance and support
  • Cepawiel for his support and creating lxdream-nitro branch with 32MB support

darcagn added 6 commits January 2, 2023 00:38
@darcagn
Kernel patches to enable 32MB memory size on modified Dreamcasts and …
46784aa 
…NAOMI systems
@darcagn
Added support for falling back to 16MB behavior if toolchain isn't up…
d8afbad 
…dated with latest 32MB stack patch
@darcagn
Updated incorrect function reference in code comment in arch.h
2f3d13a
@darcagn
Add memory testing application as example for utilizing system memory…
0dc7647 
… size functions; Tweak 32MB macros in arch.h; Add name to AUTHORS file
@darcagn
Patches for GCC 4.7.4, 9.3.0, and 9.3.0-AppleSilicon: Add custom buil…
f0a8ccb 
…t-in defines for KOS; patch GCC to set up stack for 32MB memory if available
@darcagn
Cast _arch_mem_top macro to uint32 in 16MB toolchain fallback to elim…
1bebd16 
…inate warnings; change #warning to #pragma message to prevent build failures in files using -Werror
@ljsebald ljsebald merged commit 233498b into KallistiOS:master Jan 3, 2023
@darcagn darcagn deleted the 32mb-mk4 branch January 3, 2023 17:28
@cepawiel cepawiel mentioned this pull request Sep 17, 2023
Merged
@QuzarDC QuzarDC added this to the v2.1.0 milestone Feb 3, 2025
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@darcagn @ljsebald @QuzarDC