22 lines
828 B
C
22 lines
828 B
C
// Memory layout
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#define EXTMEM 0x100000 // Start of extended memory
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#define PHYSTOP 0xE000000 // Top physical memory
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#define DEVSPACE 0xFE000000 // Other devices are at high addresses
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// Key addresses for address space layout (see kmap in vm.c for layout)
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#define KERNBASE 0x80000000 // First kernel virtual address
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#define KERNLINK (KERNBASE+EXTMEM) // Address where kernel is linked
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#ifndef __ASSEMBLER__
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static inline uint v2p(void *a) { return ((uint) (a)) - KERNBASE; }
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static inline void *p2v(uint a) { return (void *) ((a) + KERNBASE); }
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#endif
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#define V2P(a) (((uint) (a)) - KERNBASE)
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#define P2V(a) (((void *) (a)) + KERNBASE)
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#define V2P_WO(x) ((x) - KERNBASE) // same as V2P, but without casts
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#define P2V_WO(x) ((x) + KERNBASE) // same as V2P, but without casts
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