https://github.com/devkitpro/gp2x-core

devkitarm core components for GP2X support
https://github.com/devkitpro/gp2x-core

Last synced: 3 months ago
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devkitarm core components for GP2X support

• Host: GitHub
• URL: https://github.com/devkitpro/gp2x-core
• Owner: devkitPro
• License: mit
• Created: 2020-06-21T16:05:09.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2020-08-13T09:00:16.000Z (over 5 years ago)
• Last Synced: 2025-01-13T09:45:44.990Z (about 1 year ago)
• Language: Assembly
• Size: 9.77 KB
• Stars: 2
• Watchers: 7
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# gp2x-core

Core files for running GP2X code on the metal

# How to define memory map

If the following symbols are declared (e.g. in ldflags -Xlinker --defsym=__testSymbol=64), they will be used.

| Symbol | Purpose |

| --- | --- |

| __int_stack_size | number of bytes allocated at top of RAM for interrupt stack (x2, one for FIQ, one for IRQ) |

| __usr_stack_size | number of bytes allocated at top of RAM for user stack |

| __non_heap_allocation | additional bytes reserved underneath the stack for things like TLBs |

| __start_of_heap | pointer to start of available heap space |

| __end_of_heap | pointer to end of available heap space |

| __io_base | base address of IO registers |

| __nand_io_base | base address of NAND IO registers |

| __params_length | length in bytes of parameter region of memory (argc, argv) |