ref: 600bbfe4aaa9ad0f73d8d73eef1b7670e5f7d3a3
dir: /os/fads/mem.h/
/* * 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 BY2V 8 /* bytes per double word */ #define BY2PG 4096 /* bytes per page */ #define WD2PG (BY2PG/BY2WD) /* words per page */ #define PGSHIFT 12 /* log(BY2PG) */ #define ROUND(s, sz) (((s)+(sz-1))&~(sz-1)) #define PGROUND(s) ROUND(s, BY2PG) #define CACHELINELOG 4 #define CACHELINESZ (1<<CACHELINELOG) #define MAXMACH 1 /* max # cpus system can run */ #define MACHSIZE BY2PG /* * Time */ #define HZ 100 /* clock frequency */ #define MS2HZ (1000/HZ) /* millisec per clock tick */ #define TK2SEC(t) ((t)/HZ) /* ticks to seconds */ #define MS2TK(t) ((t)/MS2HZ) /* milliseconds to ticks */ #define MHz 1000000 /* * MSR bits */ #define POW 0x40000 /* enable power mgmt */ #define TGPR 0x20000 /* GPR0-3 remapped; 603/603e specific */ #define ILE 0x10000 /* interrupts little endian */ #define EE 0x08000 /* enable external/decrementer interrupts */ #define PR 0x04000 /* =1, user mode */ #define FPE 0x02000 /* enable floating point */ #define ME 0x01000 /* enable machine check exceptions */ #define FE0 0x00800 #define SE 0x00400 /* single-step trace */ #define BE 0x00200 /* branch trace */ #define FE1 0x00100 #define MSR_IP 0x00040 /* =0, vector to nnnnn; =1, vector to FFFnnnnn */ #define IR 0x00020 /* enable instruction address translation */ #define DR 0x00010 /* enable data address translation */ #define RI 0x00002 /* exception is recoverable */ #define LE 0x00001 /* little endian mode */ #define KMSR (ME|FE0|FE1|FPE) #define UMSR (KMSR|PR|EE|IR|DR) /* * Magic registers */ #define MACH 30 /* R30 is m-> */ #define USER 29 /* R29 is up-> */ #define IOMEMR 28 /* R28 will be iomem-> */ /* * Fundamental addresses */ #define UREGSIZE ((8+32)*4) /* * MMU */ /* L1 table entry and Mx_TWC flags */ #define PTEVALID (1<<0) #define PTEWT (1<<1) /* write through */ #define PTE4K (0<<2) #define PTE512K (1<<2) #define PTE8MB (3<<2) #define PTEG (1<<4) /* guarded */ /* L2 table entry and Mx_RPN flags (also PTEVALID) */ #define PTECI (1<<1) /* cache inhibit */ #define PTESH (1<<2) /* page is shared; ASID ignored */ #define PTELPS (1<<3) /* large page size */ #define PTEWRITE 0x9F0 /* TLB and MxEPN flag */ #define TLBVALID (1<<9) /* * Address spaces */ #define KUSEG 0x00000000 #define KSEG0 0x20000000 #define KSEGM 0xE0000000 /* mask to check which seg */ #define KZERO KSEG0 /* base of kernel address space */ #define KTZERO (KZERO+0x3000) /* first address in kernel text */ #define KSTACK 8192 /* Size of kernel stack */ #define CONFADDR (KZERO|0x200000) /* where qboot leaves configuration info */ /* * Exception codes (trap vectors) */ #define CRESET 0x01 #define CMCHECK 0x02 #define CDSI 0x03 #define CISI 0x04 #define CEI 0x05 #define CALIGN 0x06 #define CPROG 0x07 #define CFPU 0x08 #define CDEC 0x09 #define CSYSCALL 0x0C #define CTRACE 0x0D #define CFPA 0x0E /* rest are power-implementation dependent (8xx) */ #define CEMU 0x10 #define CIMISS 0x11 #define CDMISS 0x12 #define CITLBE 0x13 #define CDTLBE 0x14 #define CDBREAK 0x1C #define CIBREAK 0x1D #define CPBREAK 0x1E #define CDPORT 0x1F /* * MPC8xx physical addresses */ /* those encouraged by mpc8bug */ #define PHYSDRAM 0x00000000 #define PHYSBCSR 0x02100000 #define PHYSIMM 0x02200000 #define PHYSFLASH 0x02800000 /* remaining ones are our choice */ #define PHYSSDRAM 0x03000000 #define PHYSPCMCIA 0x04000000 #define PCMCIALEN (8*MB) /* chosen to allow mapping by single TLB entry */ #define ISAIO (KZERO|PHYSPCMCIA) /* for inb.s */ /* * MPC8xx dual-ported CPM memory physical addresses */ #define PHYSDPRAM (PHYSIMM+0x2000) #define DPLEN1 0x200 #define DPLEN2 0x400 #define DPLEN3 0x800 #define DPBASE (PHYSDPRAM+DPLEN1) #define KEEP_ALIVE_KEY 0x55ccaa33 /* clock and rtc register key */