Tiberiu Chibici
e3b3584734
==================================================== Mainly changed: Tasking + Implemented multitasking
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/*
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* memory_alloc.c
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*
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* Created on: Aug 27, 2011
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* Author: Tiberiu
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*/
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#include <memory-add.h>
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extern uint32 mem_kernel_end;
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extern uint8 mem_initialized;
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// Used prior to proper initialization
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uint32 _malloc_init1 (uint32 size, uint8 page_aligned)
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{
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uint32 ret = mem_kernel_end;
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if (page_aligned && (ret & 0xfff)) ret = (ret & 0xfffff000) + 0x1000;
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mem_kernel_end = size + ret;
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Log("Mem","%#Allocated %u bytes (%spage aligned) at end of kernel (0x%x).\n", ColorLightMagenta, size, ((page_aligned) ? "" : "not "), ret);
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return (ret);
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}
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uint32 _malloc_init2 (uint32 size, uint8 page_aligned, uint32* phys)
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{
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uint32 ret = MemHeapAlloc(size, page_aligned, KernelHeap, KernelDirectory);
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if (phys)
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{
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*phys = PagingGetPhysical(ret, KernelDirectory) + (ret & 0xFFF);
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Log("Mem","%#Allocated %u bytes (%spage aligned) at address 0x%x (phys=%x).\n", ColorLightMagenta, size, ((page_aligned) ? "" : "not "), ret, *phys);
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}
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else {
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Log("Mem","%#Allocated %u bytes (%spage aligned) at address 0x%x.\n", ColorLightMagenta, size, ((page_aligned) ? "" : "not "), ret);
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}
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return ret;
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}
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// Allocate 'size' bytes
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void* kmalloc (uint32 size)
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{
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if (!mem_initialized) return 0;
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if (mem_initialized == 1) return (void*)_malloc_init1(size, 0);
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return (void*)_malloc_init2(size,0,0);
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}
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// Allocate 'size' bytes, page aligned
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void* kmalloc_a(uint32 size)
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{
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if (!mem_initialized) return 0;
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if (mem_initialized == 1) return (void*)_malloc_init1(size, 1);
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return (void*)_malloc_init2(size,1,0);
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}
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void* kmalloc_p(uint32 size, uint32* phys)
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{
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if (!mem_initialized) return 0;
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if (mem_initialized == 1) {
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*phys = _malloc_init1(size,0);
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return (void*)(*phys);
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}
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return (void*)_malloc_init2(size,0,phys);
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}
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void* kmalloc_ap(uint32 size, uint32* phys)
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{
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if (!mem_initialized) return 0;
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uint32 ret;
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if (mem_initialized == 1) {
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*phys = ret = _malloc_init1(size,1);
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}
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else ret = _malloc_init2(size,1,phys);
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return (void*)ret;
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}
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void* kmrealloc (void* original, uint32 newsz)
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{
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void* re = kmalloc(newsz);
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memcpy (re, original, newsz);
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kfree(original);
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return re;
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}
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