mirror of
https://git.planet-casio.com/Lephenixnoir/gint.git
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162b11cc73
This change introduces a centralized memory allocator in the kernel. This interface can call into multiple arenas, including the default OS heap and planned arenas managed by a gint algorithm. The main advantage of this method is that it allows the heap to be extended over previously-unused areas of RAM such as the end of the static RAM region (apart from where the stack resides). Not using the OS heap is also sometimes a matter of correctness since on some OS versions the heap is known to fragment badly and degrade over time. I hope the deep control this interfaces gives over meomry allocation will allow very particular applications like object-specific allocators in fragmented SPU memory. This change does not introduce any new algorithm or arena so programs should behave exactly as before.
175 lines
2.9 KiB
ArmAsm
175 lines
2.9 KiB
ArmAsm
/*
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** gint:core:syscalls - calls to CASIOWIN
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**
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** This file can be seen as a list of everywhere gint relies on the
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** underlying OS. Although I wish to make gint free-standing, there are
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** still a few hard questions, namely:
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** * MMU management, because doing it wrong might break the calculator.
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** * Dynamic allocation, because we can't trash the system heap.
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** * File system, because it's a mess and we might ruin the ROM.
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*/
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.text
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/* Dynamic allocation */
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.global ___malloc
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.global ___free
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.global ___calloc
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.global ___realloc
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/* Bfile driver */
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.global _BFile_Remove
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.global _BFile_Create
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.global _BFile_Open
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.global _BFile_Close
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.global _BFile_Size
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.global _BFile_Write
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.global _BFile_Read
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.global _BFile_FindFirst
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.global _BFile_FindNext
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.global _BFile_FindClose
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/* Return to menu */
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.global ___Timer_Install
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.global ___Timer_Start
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.global ___Timer_Stop
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.global ___Timer_Deinstall
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.global ___PutKeyCode
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.global ___GetKeyWait
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.global ___ClearKeyBuffer
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.global ___GetVRAMAddress
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.global ___ConfigureStatusArea
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#define syscall_(id, syscall_table) \
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mov.l syscall_table, r2 ;\
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mov.l 1f, r0 ;\
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jmp @r2 ;\
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nop ;\
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.align 4 ;\
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1: .long id
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#define syscall(id) syscall_(id, syscall_table)
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#ifdef FX9860G
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/* Dynamic allocation */
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___malloc:
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syscall(0x0acd)
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___free:
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syscall(0x0acc)
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___realloc:
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syscall(0x0e6d)
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/* BFile driver */
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_BFile_Remove:
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syscall(0x0439)
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_BFile_Create:
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syscall(0x0434)
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_BFile_Open:
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syscall(0x042c)
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_BFile_Close:
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syscall(0x042d)
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_BFile_Size:
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syscall(0x042f)
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_BFile_Write:
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syscall(0x0435)
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_BFile_Read:
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syscall(0x0432)
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_BFile_FindFirst:
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syscall(0x043b)
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_BFile_FindNext:
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syscall(0x043c)
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_BFile_FindClose:
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syscall(0x043d)
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/* Return to menu */
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___Timer_Install:
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syscall(0x118)
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___Timer_Start:
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syscall(0x11a)
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___Timer_Stop:
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syscall(0x11b)
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___Timer_Deinstall:
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syscall(0x119)
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___PutKeyCode:
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syscall(0x248)
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___GetKeyWait:
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syscall(0x247)
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___ClearKeyBuffer:
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syscall(0x241)
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___GetVRAMAddress:
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syscall(0x135)
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syscall_table:
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.long 0x80010070
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#endif /* FX9860G */
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#ifdef FXCG50
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/* Dynamic allocation */
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___malloc:
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syscall(0x1f44)
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___free:
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syscall(0x1f42)
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___realloc:
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syscall(0x1f46)
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/* BFile driver */
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_BFile_Remove:
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mov #0, r5
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syscall(0x1db4)
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_BFile_Create:
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syscall(0x1dae)
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_BFile_Open:
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mov #0, r6
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syscall(0x1da3)
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_BFile_Close:
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syscall(0x1da4)
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_BFile_Size:
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syscall(0x1da6)
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_BFile_Write:
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syscall(0x1daf)
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_BFile_Read:
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syscall(0x1dac)
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_BFile_FindFirst:
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syscall(0x1db7)
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_BFile_FindNext:
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syscall(0x1db9)
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_BFile_FindClose:
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syscall(0x1dba)
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/* Return to menu */
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___Timer_Install:
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syscall(0x8d9)
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___Timer_Start:
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syscall(0x8db)
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___Timer_Stop:
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syscall(0x8dc)
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___Timer_Deinstall:
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syscall(0x8da)
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___PutKeyCode:
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syscall(0x12c6)
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___GetKeyWait:
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syscall(0x12bf)
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___ClearKeyBuffer:
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syscall(0x12c7)
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___GetVRAMAddress:
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syscall(0x1e6)
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___ConfigureStatusArea:
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syscall(0x2b7)
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.global ___SpecialMatrixCodeProcessing
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___SpecialMatrixCodeProcessing:
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syscall(0x1e60)
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syscall_table:
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.long 0x80020070
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#endif /* FXCG50 */
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