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- /*
- * 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 */
- #define TSTKTOP (USTKTOP-USTKSIZE) /* sysexec temporary stack */
- #define TSTKSIZ 256
- /* 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
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