Mercurial > hg > Members > innparusu > xv6_rpi_port

comparison uprogs/memlayout.h @ 0:c450faca55f4

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Init
author Tatsuki IHA <innparusu@cr.ie.u-ryukyu.ac.jp>
date Sun, 22 Oct 2017 18:25:39 +0900
parents
children
comparison
equal deleted inserted replaced
-1:000000000000 0:c450faca55f4
1 // Memory layout
2
3 #define EXTMEM 0x8000 /* start of kernel code */
4 #define PHYSTOP 0x8000000 /* assuming 128M RAM; need a fix to find the true RAM size */
5 #define DEVSPACE 0xFE000000 /* i/o registers */
6
7 // Key addresses for address space layout (see kmap in vm.c for layout)
8 #define KERNBASE 0x80000000 // First kernel virtual address
9 #define KERNLINK (KERNBASE+EXTMEM) // Address where kernel is linked
10 #define USERBOUND 0x40000000 // maximum user space due to one page pgd
11
12 #define MACHADDR (KERNBASE+0x2000)
13 #define PA_START 0x0
14 #define PHYSIO 0x20000000
15 #define RAMSIZE (128*MByte)
16 #define IOSIZE (16*MByte)
17 #define TVSIZE 0x1000
18
19 static inline uint v2p(void *a) { return ((uint) (a)) - KERNBASE; }
20 static inline void *p2v(uint a) { return (void *) ((a) + KERNBASE); }
21
22 #define V2P(a) (((uint) (a)) - KERNBASE)
23 #define P2V(a) (((void *) (a)) + KERNBASE)
24
25 #define V2P_WO(x) ((x) - KERNBASE) // same as V2P, but without casts
26 #define P2V_WO(x) ((x) + KERNBASE) // same as V2P, but without casts
27