ref: f1a32c955360268a7bc901de057e6e451c979853
dir: /sys/src/9/teg2/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 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) ROUND(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 KSTACK (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 */ /* * 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 */ /* address at which to copy and execute rebootcode */ #define REBOOTADDR KADDR(0x100) /* * Legacy... */ #define BLOCKALIGN CACHELINESZ /* only used in allocb.c */ /* * 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? */ /* * These bits are completely artificial. * With a little work these move to port. */ #define PTEVALID (1<<0) #define PTERONLY 0 #define PTEWRITE (1<<1) #define PTECACHED 0 #define PTEUNCACHED (1<<2) /* * 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