ref: b24ed2bfac81798221977ffed8980d2b4eeab199
dir: /sys/src/9/bcm64/mem.h/
/* * Memory and machine-specific definitions. Used in C and assembler. */ #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)) #define PGROUND(s) ROUNDUP(s, BY2PG) #define ROUND(s, sz) (((s)+(sz-1))&~(sz-1)) /* * Sizes: * L0 L1 L2 L3 * 4K 2M 1G 512G * 16K 32M 64G 128T * 64K 512M 4T - */ #define PGSHIFT 12 /* log(BY2PG) */ #define BY2PG (1ULL<<PGSHIFT) /* bytes per page */ /* effective virtual address space */ #define EVASHIFT 36 #define EVAMASK ((1ULL<<EVASHIFT)-1) #define PTSHIFT (PGSHIFT-3) #define PTLEVELS HOWMANY(EVASHIFT-PGSHIFT, PTSHIFT) #define PTLX(v, l) ((((v) & EVAMASK) >> (PGSHIFT + (l)*PTSHIFT)) & ((1 << PTSHIFT)-1)) #define PGLSZ(l) (1ULL << (PGSHIFT + (l)*PTSHIFT)) #define PTL1X(v, l) (L1TABLEX(v, l) | PTLX(v, l)) #define L1TABLEX(v, l) (L1TABLE(v, l) << PTSHIFT) #define L1TABLES HOWMANY(-KZERO, PGLSZ(2)) #define L1TABLE(v, l) (L1TABLES-1 - ((PTLX(v, 2) % L1TABLES) >> (((l)-1)*PTSHIFT)) + (l)-1) #define L1TOPSIZE (1ULL << (EVASHIFT - PTLEVELS*PTSHIFT)) #define MAXMACH 4 /* max # cpus system can run */ #define MACHSIZE (8*KiB) #define KSTACK (8*KiB) #define STACKALIGN(sp) ((sp) & ~7) /* bug: assure with alloc */ #define TRAPFRAMESIZE (38*8) /* * Address spaces. * KTZERO is used by kprof and dumpstack (if any). * * KZERO is mapped to physical 0 (start of ram). */ #define KZERO 0xFFFFFFFF80000000ULL /* kernel address space */ #define SPINTABLE (KZERO+0xd8) #define CONFADDR (KZERO+0x100) #define REBOOTADDR (0x1c00) /* reboot code - physical address */ #define VCBUFFER (KZERO+0x3400) /* videocore mailbox buffer */ #define L1 (L1TOP-L1SIZE) #define L1SIZE ((L1TABLES+PTLEVELS-3)*BY2PG) #define L1TOP ((MACHADDR(MAXMACH-1)-L1TOPSIZE)&-BY2PG) #define MACHADDR(n) (KTZERO-((n)+1)*MACHSIZE) #define KTZERO (KZERO+0x80000) /* kernel text start */ #define FRAMEBUFFER (0xFFFFFFFFC0000000ULL | PTEWT) #define VIRTIO 0xFFFFFFFFE0000000ULL /* i/o registers */ #define ARMLOCAL (VIRTIO+IOSIZE) #define VGPIO 0 /* virtual gpio for pi3 ACT LED */ #define UZERO 0ULL /* user segment */ #define UTZERO (UZERO+0x10000) /* user text start */ #define USTKTOP ((EVAMASK>>1)-0xFFFF) /* user segment end +1 */ #define USTKSIZE (16*1024*1024) /* user stack size */ #define BLOCKALIGN 64 /* only used in allocb.c */ /* * Sizes */ #define BI2BY 8 /* bits per byte */ #define BY2SE 4 #define BY2WD 8 #define BY2V 8 /* only used in xalloc.c */ #define PTEMAPMEM (1024*1024) #define PTEPERTAB (PTEMAPMEM/BY2PG) #define SEGMAPSIZE 1984 #define SSEGMAPSIZE 16 #define PPN(x) ((x)&~(BY2PG-1)) #define SHARE_NONE 0 #define SHARE_OUTER 2 #define SHARE_INNER 3 #define CACHE_UC 0 #define CACHE_WB 1 #define CACHE_WT 2 #define CACHE_WB_NA 3 #define MA_MEM_WB 0 #define MA_MEM_WT 1 #define MA_MEM_UC 2 #define MA_DEV_nGnRnE 3 #define MA_DEV_nGnRE 4 #define MA_DEV_nGRE 5 #define MA_DEV_GRE 6 #define PTEVALID 1 #define PTEBLOCK 0 #define PTETABLE 2 #define PTEPAGE 2 #define PTEMA(x) ((x)<<2) #define PTEAP(x) ((x)<<6) #define PTESH(x) ((x)<<8) #define PTEAF (1<<10) #define PTENG (1<<11) #define PTEKERNEL PTEAP(0) #define PTEUSER PTEAP(1) #define PTEWRITE PTEAP(0) #define PTERONLY PTEAP(2) #define PTEWT PTEMA(MA_MEM_WT) #define PTEUNCACHED PTEMA(MA_MEM_UC) #define PTEDEVICE PTEMA(MA_DEV_nGnRE) /* * Physical machine information from here on. * PHYS addresses as seen from the arm cpu. * BUS addresses as seen from the videocore gpu. */ #define PHYSDRAM 0 #define IOSIZE (16*MiB) #define MIN(a, b) ((a) < (b)? (a): (b)) #define MAX(a, b) ((a) > (b)? (a): (b))