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47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
/*!
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* @file kmalloc.h
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* GOAL Kernel memory allocator.
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* Simple two-sided bump allocator.
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* DONE
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*/
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#ifndef JAK_KMALLOC_H
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#define JAK_KMALLOC_H
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#include "common/common_types.h"
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#include "Ptr.h"
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#include "kmachine.h"
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/*!
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* A kheap has a top/bottom linear allocator
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*/
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struct kheapinfo {
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Ptr<u8> base; //! beginning of heap
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Ptr<u8> top; //! current location of bottom of top allocations
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Ptr<u8> current; //! current location of top of bottom allocations
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Ptr<u8> top_base; //! end of heap
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};
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// Kernel heaps
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extern Ptr<kheapinfo> kglobalheap;
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extern Ptr<kheapinfo> kdebugheap;
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// flags for kmalloc/ksmalloc
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constexpr u32 KMALLOC_TOP = 0x2000; //! Flag to allocate temporary memory from heap top
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constexpr u32 KMALLOC_MEMSET = 0x1000; //! Flag to clear memory
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constexpr u32 KMALLOC_ALIGN_256 = 0x100;
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constexpr u32 KMALLOC_ALIGN_64 = 0x40;
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constexpr u32 KMALLOC_ALIGN_16 = 0x10;
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// kmalloc funcions
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Ptr<u8> ksmalloc(Ptr<kheapinfo> heap, s32 size, u32 flags, char const* name);
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void kheapstatus(Ptr<kheapinfo> heap);
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Ptr<kheapinfo> kinitheap(Ptr<kheapinfo> heap, Ptr<u8> mem, s32 size);
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u32 kheapused(Ptr<kheapinfo> heap);
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Ptr<u8> kmalloc(Ptr<kheapinfo> heap, s32 size, u32 flags, char const* name);
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void kfree(Ptr<u8> a);
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void kmalloc_init_globals();
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#endif // JAK_KMALLOC_H
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