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https://github.com/Ed94/pikuma_ps1.git
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ed
748b58c5c5
Need to rewrite the ps1 lua metaprogram sometime soonish. Getting too bloated... need to consolidate code paths. In this push codebase structure is starting to get a bit more realized. Decided todo now to match Pikuma's linking module files vods beginning to reorganize its codebase as well. Atoms & atom components are not in their on *.atom.c files. (Not calling it tape.c as I don't really bake tapes like that outside of the unity c file so far...) The lua metaprogram has had additional features added to it yet again to avoid hardcoding module handling and supporting multiple atom files per-module. Either after the camera or cd-rom section I'll be most likely pausing to fully refactor the metaprogram. Possibly as a full re-write to get the loc minimal.
39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
#ifdef INTELLISENSE_DIRECTIVES
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# include "gen/macs.h"
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# include "gen/offsets.h"
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# include "lottes_tape.h"
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#endif
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ATOM_FILE_DEBUGGER_LINE_MARKER(mips_atom_c);
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#pragma region Baked Atoms
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enum {
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bios_flushcache = 0x44,
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bios_table_addr = 0xA0,
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};
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/* Flushes the Instruction Cache (PSX A-function 0x44 via BIOS stub at 0xA0).
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* Sequence (per MIPS ABI; arguments in arg registers, RA pushed to stack):
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* 1. sp -= 8; sw $ra, 4($sp) ; save RA
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* 2. $a0 = bios_flushcache (arg0)
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* 3. $t0 = bios_table_addr ; t0 = &BIOS A-function table
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* 4. jalr $t0, $ra ; call BIOS(flushcache)
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* nop ; branch delay slot
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* 5. lw $ra, 4($sp); jr $ra ; restore & return
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* 6. sp += 8
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*/
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internal MipsAtom_(mips_flush_icache) {
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add_ui(rstack_ptr, rstack_ptr, -MipsStackAlignment), // sp -= 8
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store_word(rret_addr, rstack_ptr, S_(U4)), // sw $ra, 4($sp)
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add_ui(rret_0, rdiscard, bios_flushcache), // addiu $a0, $0, 0x44
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add_ui(rtmp_0, rdiscard, bios_table_addr), // addiu $t0, $0, 0xA0
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jump_link(rtmp_0, rret_addr), nop, // jalr $t0, $ra, BD slot
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load_word(rret_addr, rstack_ptr, S_(U4)), // lw $ra, 4($sp)
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jump_reg(rret_addr), // jr $ra
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add_ui(rstack_ptr, rstack_ptr, MipsStackAlignment), // sp += 8 (BD)
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mac_yield(),
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};
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#pragma endregion Baked Atoms
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