145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/*
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* Memory and machine-specific definitions. Used in C and assembler.
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*/
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#define KiB 1024u /* Kibi 0x0000000000000400 */
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#define MiB 1048576u /* Mebi 0x0000000000100000 */
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#define GiB 1073741824u /* Gibi 000000000040000000 */
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/*
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* Sizes:
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* L0 L1 L2 L3
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* 4K 2M 1G 512G
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* 16K 32M 64G 128T
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* 64K 512M 4T -
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*/
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#define PGSHIFT 16 /* log(BY2PG) */
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#define BY2PG (1ULL<<PGSHIFT) /* bytes per page */
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#define ROUND(s, sz) (((s)+(sz-1))&~(sz-1))
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#define PGROUND(s) ROUND(s, BY2PG)
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/* effective virtual address space */
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#define EVASHIFT 34
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#define EVAMASK ((1ULL<<EVASHIFT)-1)
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#define PTSHIFT (PGSHIFT-3)
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#define PTLEVELS (((EVASHIFT-PGSHIFT)+PTSHIFT-1)/PTSHIFT)
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#define PTLX(v, l) ((((v) & EVAMASK) >> (PGSHIFT + (l)*PTSHIFT)) & ((1 << PTSHIFT)-1))
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#define PGLSZ(l) (1ULL << (PGSHIFT + (l)*PTSHIFT))
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#define PTL1X(v, l) (L1TABLEX(v, l) | PTLX(v, l))
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#define L1TABLEX(v, l) (L1TABLE(v, l) << PTSHIFT)
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#define L1TABLES ((-KSEG0+PGLSZ(2)-1)/PGLSZ(2))
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#define L1TABLE(v, l) (L1TABLES - ((PTLX(v, 2) % L1TABLES) >> (((l)-1)*PTSHIFT)) + (l)-1)
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#define L1TOPSIZE (1ULL << (EVASHIFT - PTLEVELS*PTSHIFT))
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#define MAXMACH 4 /* max # cpus system can run */
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#define MACHSIZE (8*KiB)
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#define KSTACK (8*KiB)
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#define STACKALIGN(sp) ((sp) & ~7) /* bug: assure with alloc */
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#define TRAPFRAMESIZE (38*8)
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/* reserved dram for ucalloc() and fbmemalloc() at the end of KZERO (physical) */
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#define UCRAMBASE (-KZERO - UCRAMSIZE)
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#define UCRAMSIZE (8*MiB)
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#define VDRAM (0xFFFFFFFFC0000000ULL) /* 0x40000000 - 0x80000000 */
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#define KTZERO (VDRAM + 0x100000) /* 0x40100000 - kernel text start */
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#define VIRTIO (0xFFFFFFFFB0000000ULL) /* 0x30000000 */
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#define KZERO (0xFFFFFFFF80000000ULL) /* 0x00000000 - kernel address space */
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#define VMAP (0xFFFFFFFF00000000ULL) /* 0x00000000 - 0x40000000 */
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#define KMAPEND (0xFFFFFFFF00000000ULL) /* 0x140000000 */
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#define KMAP (0xFFFFFFFE00000000ULL) /* 0x40000000 */
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#define KSEG0 (0xFFFFFFFE00000000ULL)
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#define L1 (L1TOP-L1SIZE)
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#define L1SIZE ((L1TABLES+PTLEVELS-2)*BY2PG)
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#define L1TOP ((MACHADDR(MAXMACH-1)-L1TOPSIZE)&-BY2PG)
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#define MACHADDR(n) (KTZERO-((n)+1)*MACHSIZE)
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#define CONFADDR (VDRAM + 0x10000) /* 0x40010000 */
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#define BOOTARGS ((char*)CONFADDR)
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#define BOOTARGSLEN 0x10000
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#define REBOOTADDR (VDRAM-KZERO + 0x20000) /* 0x40020000 */
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#define UZERO 0ULL /* user segment */
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#define UTZERO (UZERO+0x10000) /* user text start */
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#define USTKTOP ((EVAMASK>>1)-0xFFFF) /* user segment end +1 */
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#define USTKSIZE (16*1024*1024) /* user stack size */
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#define BLOCKALIGN 64 /* only used in allocb.c */
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/*
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* Sizes
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*/
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#define BI2BY 8 /* bits per byte */
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#define BY2SE 4
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#define BY2WD 8
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#define BY2V 8 /* only used in xalloc.c */
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#define PTEMAPMEM (1024*1024)
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#define PTEPERTAB (PTEMAPMEM/BY2PG)
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#define SEGMAPSIZE 8192
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#define SSEGMAPSIZE 16
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#define PPN(x) ((x)&~(BY2PG-1))
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#define SHARE_NONE 0
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#define SHARE_OUTER 2
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#define SHARE_INNER 3
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#define CACHE_UC 0
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#define CACHE_WB 1
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#define CACHE_WT 2
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#define CACHE_WB_NA 3
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#define MA_MEM_WB 0
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#define MA_MEM_WT 1
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#define MA_MEM_UC 2
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#define MA_DEV_nGnRnE 3
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#define MA_DEV_nGnRE 4
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#define MA_DEV_nGRE 5
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#define MA_DEV_GRE 6
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#define PTEVALID 1
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#define PTEBLOCK 0
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#define PTETABLE 2
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#define PTEPAGE 2
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#define PTEMA(x) ((x)<<2)
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#define PTEAP(x) ((x)<<6)
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#define PTESH(x) ((x)<<8)
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#define PTEAF (1<<10)
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#define PTENG (1<<11)
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#define PTEPXN (1ULL<<53)
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#define PTEUXN (1ULL<<54)
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#define PTEKERNEL PTEAP(0)
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#define PTEUSER PTEAP(1)
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#define PTEWRITE PTEAP(0)
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#define PTERONLY PTEAP(2)
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#define PTENOEXEC (PTEPXN|PTEUXN)
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#define PTECACHED PTEMA(MA_MEM_WB)
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#define PTEWT PTEMA(MA_MEM_WT)
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#define PTEUNCACHED PTEMA(MA_MEM_UC)
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#define PTEDEVICE PTEMA(MA_DEV_nGnRE)
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/*
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* Physical machine information from here on.
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* PHYS addresses as seen from the arm cpu.
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* BUS addresses as seen from peripherals
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*/
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#define PHYSDRAM 0
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#define MIN(a, b) ((a) < (b)? (a): (b))
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#define MAX(a, b) ((a) > (b)? (a): (b))
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