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https://github.com/Zeal-Operating-System/ZealOS.git
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82 lines
2 KiB
HolyC
Executable file
82 lines
2 KiB
HolyC
Executable file
U0 BlkPoolAdd(CBlkPool *bp, CMemBlk *m, I64 pags)
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{//Add mem to BlkPool.
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if (sys_mem_init_flag)
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MemSet(m, sys_mem_init_val, pags * MEM_PAG_SIZE);
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PUSHFD
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CLI
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while (LBts(&bp->locked_flags, BPlf_LOCKED))
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PAUSE
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m->next = bp->mem_free_list;
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m->pags = pags;
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m->mb_signature = MBS_UNUSED_SIGNATURE_VAL;
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bp->alloced_u8s += pags << MEM_PAG_BITS;
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bp->mem_free_list = m;
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LBtr(&bp->locked_flags, BPlf_LOCKED);
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POPFD
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}
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U0 BlkPoolInit(CBlkPool *bp, I64 pags)
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{//Make mem chunk into a BlkPool.
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I64 num;
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CMemBlk *m;
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MemSet(bp, 0, sizeof(CBlkPool));
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m = (bp(U8 *) + sizeof(CBlkPool) + MEM_PAG_SIZE - 1) & ~(MEM_PAG_SIZE - 1);
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num = (bp(U8 *) + pags << MEM_PAG_BITS - m(U8 *)) >> MEM_PAG_BITS;
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bp->alloced_u8s = (pags-num) << MEM_PAG_BITS; //Compensate before num added.
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BlkPoolAdd(bp, m, num);
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}
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U0 BlkPoolsInit()
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{
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I64 i, total, lo, hi, code_heap_limit;
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CMemE820 *m20 = MEM_E820;
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Bool first = TRUE;
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total = MemBIOSTotal;
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if (total <= 0x80000000)
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code_heap_limit = total;
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else if (total <= 0x100000000)
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code_heap_limit = total / 4;
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else
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code_heap_limit = 0x80000000;
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i = code_heap_limit - SYS_16MEG_AREA_LIMIT; //See $LK,"RLf_16MEG_SYS_CODE_BP",A="FF:::/Kernel/Memory/PageTables.ZC,RLf_16MEG_SYS_CODE_BP"$
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BlkPoolAdd(sys_code_bp, SYS_16MEG_AREA_LIMIT, i >> MEM_PAG_BITS);
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mem_heap_limit = i + SYS_16MEG_AREA_LIMIT - 1;
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if (code_heap_limit<total)
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{
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while (m20->type)
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{
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if (m20->type == MEM_E820t_USABLE)
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{
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lo = m20->base;
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hi = m20->base + m20->len;
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if (lo<code_heap_limit)
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{
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if (hi > code_heap_limit)
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lo = code_heap_limit;
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else
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hi = lo; //cancel
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}
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if (code_heap_limit <= lo < hi)
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{
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if (first)
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{
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BlkPoolInit(lo, (hi - lo) >> MEM_PAG_BITS);
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sys_data_bp = lo;
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Fs->data_heap = HeapCtrlInit(, Fs, sys_data_bp);
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first = FALSE;
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}
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else
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BlkPoolAdd(sys_data_bp, lo, (hi - lo) >> MEM_PAG_BITS);
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}
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}
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m20++;
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}
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}
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LBts(&sys_run_level, RLf_FULL_HEAPS);
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}
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