Mercurial > hg > Members > mitsuki > xv6_rpi2_port
diff uprogs/memlayout.h @ 0:ed10291ff195
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author | mir3636 |
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date | Sun, 06 Jan 2019 19:27:03 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/uprogs/memlayout.h Sun Jan 06 19:27:03 2019 +0900 @@ -0,0 +1,18 @@ +// Memory layout + +// Key addresses for address space layout (see kmap in vm.c for layout) +#define KERNBASE 0x80000000 // First kernel virtual address +#define USERBOUND 0x40000000 // maximum user space due to one page pgd + +#define MACHADDR (KERNBASE+0x2000) +#define TVSIZE 0x1000 + +static inline uint v2p(void *a) { return ((uint) (a)) - KERNBASE; } +static inline void *p2v(uint a) { return (void *) ((a) + KERNBASE); } + +#define V2P(a) (((uint) (a)) - KERNBASE) +#define P2V(a) (((void *) (a)) + KERNBASE) + +#define V2P_WO(x) ((x) - KERNBASE) // same as V2P, but without casts +#define P2V_WO(x) ((x) + KERNBASE) // same as V2P, but without casts +