123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150 |
- /*
- * 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))
- /* max # of cpus system can run. tegra2 cpu ids are two bits wide. */
- #define MAXMACH 4
- #define MACHSIZE BY2PG
- #define L1SIZE (4 * BY2PG)
- #define KSTKSIZE (16*KiB) /* was 8K */
- #define STACKALIGN(sp) ((sp) & ~7) /* bug: assure with alloc */
- /*
- * Magic registers
- */
- #define USER 9 /* R9 is up-> */
- #define MACH 10 /* R10 is m-> */
- /*
- * Address spaces.
- * KTZERO is used by kprof and dumpstack (if any).
- *
- * KZERO (0xc0000000) is mapped to physical 0 (start of dram).
- * u-boot claims to occupy the first 4 MB of dram, but we're willing to
- * step on it once we're loaded.
- *
- * L2 PTEs are stored in 4K before cpu0's Mach (8K to 12K above KZERO).
- * cpu0's Mach struct is at L1 - MACHSIZE(4K) to L1 (12K to 16K above KZERO).
- * L1 PTEs are stored from L1 to L1+32K (16K to 48K above KZERO).
- * plan9.ini is loaded at CONFADDR (4MB).
- * KTZERO may be anywhere after that.
- */
- #define KSEG0 0xC0000000 /* kernel segment */
- /* mask to check segment; good for 1GB dram */
- #define KSEGM 0xC0000000
- #define KZERO KSEG0 /* kernel address space */
- #define L1 (KZERO+16*KiB) /* cpu0 l1 page table; 16KiB aligned */
- #define CONFADDR (KZERO+0x400000) /* unparsed plan9.ini */
- #define CACHECONF (CONFADDR+48*KiB)
- /* KTZERO must match loadaddr in mkfile */
- #define KTZERO (KZERO+0x410000) /* kernel text start */
- #define L2pages (2*MiB) /* high memory reserved for l2 page tables */
- #define RESRVDHIMEM (64*KiB + MiB + L2pages) /* avoid HVECTOR, l2 pages */
- /* we assume that we have 1 GB of ram, which is true for all trimslices. */
- #define DRAMSIZE GiB
- #define UZERO 0 /* user segment */
- #define UTZERO (UZERO+BY2PG) /* user text start */
- #define UTROUND(t) ROUNDUP((t), BY2PG)
- /*
- * moved USTKTOP down to 1GB to keep MMIO space out of user space.
- * moved it down another MB to utterly avoid KADDR(stack_base) mapping
- * to high exception vectors. see confinit().
- */
- #define USTKTOP (0x40000000 - 64*KiB - MiB) /* 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)
- /*
- * Legacy...
- */
- #define BLOCKALIGN CACHELINESZ /* 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 /* bytes per cache line */
- #define PTEMAPMEM (1024*1024)
- #define PTEPERTAB (PTEMAPMEM/BY2PG)
- #define SEGMAPSIZE 1984 /* magic 16*124 */
- #define SSEGMAPSIZE 16 /* magic */
- #define PPN(x) ((x)&~(BY2PG-1)) /* pure page number? */
- /*
- * 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
- #define PHYSIO 0x50000000 /* cpu */
- #define VIRTIO PHYSIO
- #define PHYSL2BAG 0x50043000 /* l2 cache bag-on-the-side */
- #define PHYSEVP 0x6000f100 /* undocumented `exception vector' */
- #define PHYSCONS 0x70006000 /* uart console */
- #define PHYSIOEND 0xc0000000 /* end of ahb mem & pcie */
- #define PHYSAHB 0xc0000000 /* ahb bus */
- #define VIRTAHB 0xb0000000
- #define P2VAHB(pa) ((pa) - PHYSAHB + VIRTAHB)
- #define PHYSNOR 0xd0000000
- #define VIRTNOR 0x40000000
|