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/*
* Memory and machine-specific definitions. Used in C and assembler.
*/
/*
* Sizes
*/
#define BI2BY 8 /* bits per byte */
#define BI2WD 32 /* bits per word */
#define BY2WD 4 /* bytes per word */
#define BY2PG 4096 /* bytes per page */
#define WD2PG (BY2PG/BY2WD) /* words per page */
#define PGSHIFT 12 /* log(BY2PG) */
#define PGROUND(s) (((s)+(BY2PG-1))&~(BY2PG-1))
#define MAXMACH 1 /* max # cpus system can run */
/*
* Time
*/
#define HZ 20 /* clock frequency */
#define MS2HZ (1000/HZ) /* millisec per clock tick */
#define TK2SEC(t) ((t)/HZ) /* ticks to seconds */
#define TK2MS(t) ((((ulong)(t))*1000)/HZ) /* ticks to milliseconds */
#define MS2TK(t) ((((ulong)(t))*HZ)/1000) /* milliseconds to ticks */
/*
* PSR bits
*/
#define PSREC 0x00002000
#define PSREF 0x00001000
#define PSRSUPER 0x00000080
#define PSRPSUPER 0x00000040
#define PSRET 0x00000020
#define SPL(n) (n<<8)
/*
* Magic registers
*/
#define MACH 6 /* R6 is m-> */
#define USER 5 /* R5 is u-> */
/*
* Fundamental addresses
*/
#define USERADDR 0xE0000000
#define UREGADDR (USERADDR+BY2PG-((32+6)*BY2WD))
#define BOOTSTACK (KTZERO-0*BY2PG)
#define TRAPS (KTZERO-2*BY2PG)
/*
* MMU
*/
#define VAMASK 0x3FFFFFFF
#define NPMEG (1<<12)
#define BY2SEGM (1<<18)
#define PG2SEGM (1<<6)
#define NTLBPID (1+NCONTEXT) /* TLBPID 0 is unallocated */
#define NCONTEXT 8
#define CONTEXT 0x30000000 /* in ASI 2 */
/*
* MMU regions
*/
#define INVALIDSEGM 0xFFFC0000 /* highest seg of VA reserved as invalid */
#define INVALIDPMEG 0x7F
#define SCREENSEGM 0xFFF80000
#define SCREENPMEG 0x7E
#define ROMSEGM 0xFFE80000
#define ROMEND 0xFFEA0000
#define PG2ROM ((ROMEND-ROMSEGM)/BY2PG)
#define IOSEGM0 ROMSEGM /* see mmuinit() */
#define NIOSEGM ((SCREENSEGM-ROMSEGM)/BY2SEGM)
#define IOPMEG0 (SCREENPMEG-NIOSEGM)
#define IOSEGM ROMEND
#define IOEND SCREENSEGM
#define TOPPMEG IOPMEG0
/*
* MMU entries
*/
#define PTEVALID (1<<31)
#define PTERONLY (0<<30)
#define PTEWRITE (1<<30)
#define PTEKERNEL (1<<29)
#define PTENOCACHE (1<<28)
#define PTEMAINMEM (0<<26)
#define PTEIO (1<<26)
#define PTEACCESS (1<<25)
#define PTEMODIFY (1<<24)
#define PTEUNCACHED 0
#define PTEMAPMEM (1024*1024)
#define PTEPERTAB (PTEMAPMEM/BY2PG)
#define SEGMAPSIZE 16
#define INVALIDPTE 0
#define PPN(pa) ((pa>>12)&0xFFFF)
/*
* Weird addresses in various ASI's
*/
#define CACHETAGS 0x80000000 /* ASI 2 */
#define CACHEDATA 0x90000000 /* ASI 2 */
#define SER 0x60000000 /* ASI 2 */
#define SEVAR 0x60000004 /* ASI 2 */
#define ASER 0x60000008 /* ASI 2 */
#define ASEVAR 0x6000000C /* ASI 2 */
#define ENAB 0x40000000 /* ASI 2 */
#define ENABCACHE 0x10
#define ENABRESET 0x04
/*
* Virtual addresses
*/
#define VTAG(va) ((va>>22)&0x03F)
#define VPN(va) ((va>>13)&0x1FF)
#define PARAM ((char*)0x40500000)
#define TLBFLUSH_ 0x01
/*
* Address spaces
*/
#define UZERO 0x00000000 /* base of user address space */
#define UTZERO (UZERO+BY2PG) /* first address in user text */
#define TSTKTOP 0x10000000 /* end of new stack in sysexec */
#define TSTKSIZ 32
#define USTKTOP (TSTKTOP-TSTKSIZ*BY2PG) /* byte just beyond user stack */
#define KZERO 0xE0000000 /* base of kernel address space */
#define KTZERO (KZERO+4*BY2PG) /* first address in kernel text */
#define USTKSIZE (4*1024*1024) /* size of user stack */
#define MACHSIZE 4096
#define isphys(x) (((ulong)(x)&0xF0000000) == KZERO)