ref: a00b6bdbfa72a1688a866edf5f825720c9874ada
dir: /sys/src/9/kw/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)) /* ceiling */ #define ROUNDDN(x, y) (((x)/(y))*(y)) /* floor */ #define MIN(a, b) ((a) < (b)? (a): (b)) #define MAX(a, b) ((a) > (b)? (a): (b)) /* * Not sure where these macros should go. * This probably isn't right but will do for now. * The macro names are problematic too. */ /* * In B(o), 'o' is the bit offset in the register. * For multi-bit fields use F(v, o, w) where 'v' is the value * of the bit-field of width 'w' with LSb at bit offset 'o'. */ #define B(o) (1<<(o)) #define F(v, o, w) (((v) & ((1<<(w))-1))<<(o)) #define FCLR(d, o, w) ((d) & ~(((1<<(w))-1)<<(o))) #define FEXT(d, o, w) (((d)>>(o)) & ((1<<(w))-1)) #define FINS(d, o, w, v) (FCLR((d), (o), (w))|F((v), (o), (w))) #define FSET(d, o, w) ((d)|(((1<<(w))-1)<<(o))) #define FMASK(o, w) (((1<<(w))-1)<<(o)) /* * Sizes */ #define BY2PG (4*KiB) /* bytes per page */ #define PGSHIFT 12 /* log(BY2PG) */ #define PGROUND(s) ROUNDUP(s, BY2PG) #define ROUND(s, sz) (((s)+(sz-1))&~(sz-1)) #define MAXMACH 1 /* max # cpus system can run */ #define MACHSIZE BY2PG #define KSTKSIZE (8*KiB) #define STACKALIGN(sp) ((sp) & ~3) /* bug: assure with alloc */ /* * Address spaces. * KTZERO is used by kprof and dumpstack (if any). * * KZERO is mapped to physical 0. * u-boot claims to take 0 - 8MB. * * vectors are at 0, plan9.ini is at KZERO+4K and is limited to 16K by * devenv. L2 PTEs for trap vectors & i/o regs are stored from KZERO+56K * to L1-MACHSIZE (KZERO+60K). cpu0's Mach struct is at L1 - MACHSIZE(4K) * to L1 (KZERO+60K to KZERO+64K). L1 PTEs are stored from L1 to L1+32K * (KZERO+64K to KZERO+96K). KTZERO may be anywhere after KZERO+96K. */ #define KSEG0 0x60000000 /* kernel segment */ /* mask to check segment; good for 512MB dram */ #define KSEGM 0xE0000000 #define KZERO KSEG0 /* kernel address space */ #define CONFADDR (KZERO+4*KiB) /* unparsed plan9.ini */ #define L1 (KZERO+64*KiB) /* tt ptes: 16KiB aligned */ #define KTZERO (KZERO+0x800000) /* kernel text start */ #define UZERO 0 /* user segment */ #define UTZERO (UZERO+BY2PG) /* user text start */ #define USTKTOP KZERO /* user segment end +1 */ #define USTKSIZE (8*1024*1024) /* user stack size */ /* address at which to copy and execute rebootcode */ #define REBOOTADDR KADDR(0x100) /* * Time. * Does this need to be here? Used in assembler? */ #define HZ 100 /* clock frequency */ #define MS2HZ (1000/HZ) /* millisec per clock tick */ #define TK2SEC(t) ((t)/HZ) /* ticks to seconds */ /* * More accurate time */ #define CLOCKFREQ (200*1000*1000) /* TCLK on sheeva: 200MHz */ //#define MS2TMR(t) ((ulong)(((uvlong)(t)*CLOCKFREQ)/1000)) //#define US2TMR(t) ((ulong)(((uvlong)(t)*CLOCKFREQ)/1000000)) /* * Legacy... */ #define BLOCKALIGN 32 /* only used in allocb.c */ #define KSTACK KSTKSIZE /* * Sizes */ #define BI2BY 8 /* bits per byte */ #define BY2SE 4 #define BY2WD 4 #define BY2V 8 /* only used in xalloc.c */ #define CACHELINESZ 32 #define PTEMAPMEM (1024*1024) #define PTEPERTAB (PTEMAPMEM/BY2PG) #define SEGMAPSIZE 1984 #define SSEGMAPSIZE 16 #define PPN(x) ((x)&~(BY2PG-1)) /* * With a little work these move to port. */ #define PTEVALID (1<<0) #define PTERONLY 0 #define PTEWRITE (1<<1) #define PTEUNCACHED (1<<2) #define PTEKERNEL (1<<3) /* * Physical machine information from here on. */ #define PHYSDRAM 0 /* from 0x80000000 up is uncached by L2 (see archkw.c) */ #define PHYSCESASRAM 0xc8010000 // #define PHYSSPIFLASH 0xe8000000 /* ignore spi flash */ /* this address is configured by u-boot, and is 0xd0000000 at reset */ #define PHYSIO 0xf1000000 /* internal registers */ #define PHYSCONS (PHYSIO + 0x12000) /* uart */ #define PHYSNAND1 0xf9000000 /* sheeva/openrd (remapped) */ #define PHYSNAND2 0xd8000000 /* guru */ #define PHYSBOOTROM 0xffff0000 /* boot rom */ #define FLASHSIZE (512*MiB) /* but not addressed linearly */ #define VIRTIO PHYSIO