ref: 887ae1a17b54babf6a0946872bf6faaac1427be1
dir: /sys/src/9/omap4/mem.h/
#define KiB 1024u /* Kibi 0x0000000000000400 */ #define MiB 1048576u /* Mebi 0x0000000000100000 */ #define GiB 1073741824u /* Gibi 000000000040000000 */ #define HOWMANY(x, y) (((x)+((y)-1))/(y)) #define ROUNDUP(x, y) (HOWMANY((x), (y))*(y)) /* ceiling */ #define ROUNDDN(x, y) (((x)/(y))*(y)) /* floor */ #define MIN(a, b) ((a) < (b)? (a): (b)) #define MAX(a, b) ((a) > (b)? (a): (b)) #define PGROUND(s) ROUNDUP(s, BY2PG) #define ROUND(s, sz) (((s)+(sz-1))&~(sz-1)) #define PPN(x) ((x)&~(BY2PG-1)) #define F(v, o, w) (((v) & ((1<<(w))-1))<<(o)) #define FMASK(o, w) (((1<<(w))-1)<<(o)) #define KZERO 0xF0000000 #define KTZERO 0xF2000000 #define VECTORS 0xFFFF0000 #define MACHADDR 0xFFFF1000 #define UZERO 0 #define UTZERO BY2PG #define USTKTOP 0xE0000000 /* we map MMIO somewhere here */ #define IZERO 0xE0000000 #define NIOPAGES ROUNDDN((KZERO - IZERO) / BY2PG, 256) #define KSTKSIZ (16*KiB) #define KSTACK KSTKSIZ #define USTKSIZE (8*MiB) #define HZ (100) /* clock frequency */ #define MS2HZ (1000/HZ) /* millisec per clock tick */ #define MAXSYSARG 7 #define MAXMACH 2 #define BI2BY 8 #define BY2WD 4 #define BY2V 8 #define BY2PG 4096 #define PGSHIFT 12 #define PTEMAPMEM 1048576 #define PTEPERTAB (PTEMAPMEM/BY2PG) #define SEGMAPSIZE 1984 #define SSEGMAPSIZE 16 #define BLOCKALIGN 32 #define PTEVALID (1<<0) #define PTERONLY 0 #define PTEWRITE (1<<1) #define PTEUNCACHED (1<<2) #define PTEKERNEL (1<<3) #define PHYSDRAM 0x80000000 #define DRAMSIZ (1024 * MiB) #define L1PT PHYSDRAM #define L1SIZ (16 * KiB) #define IOPT (L1PT + L1SIZ) #define L2SIZ (1 * KiB) #define PRIVL2 (IOPT + L2SIZ * (NIOPAGES / 256)) #define PHYSVECTORS ROUNDUP(PRIVL2 + L2SIZ, BY2PG) #define FIRSTMACH (PHYSVECTORS + BY2PG)