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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 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 */
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