2013-01-26 16:33:21 +00:00
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/*
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* Memory and machine-specific definitions. Used in C and assembler.
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*/
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#define KiB 1024u /* Kibi 0x0000000000000400 */
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#define MiB 1048576u /* Mebi 0x0000000000100000 */
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#define GiB 1073741824u /* Gibi 000000000040000000 */
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#define MIN(a, b) ((a) < (b)? (a): (b))
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#define MAX(a, b) ((a) > (b)? (a): (b))
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/*
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* Not sure where these macros should go.
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* This probably isn't right but will do for now.
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* The macro names are problematic too.
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*/
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/*
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* In B(o), 'o' is the bit offset in the register.
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* For multi-bit fields use F(v, o, w) where 'v' is the value
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* of the bit-field of width 'w' with LSb at bit offset 'o'.
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*/
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#define B(o) (1<<(o))
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#define F(v, o, w) (((v) & ((1<<(w))-1))<<(o))
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#define FCLR(d, o, w) ((d) & ~(((1<<(w))-1)<<(o)))
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#define FEXT(d, o, w) (((d)>>(o)) & ((1<<(w))-1))
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#define FINS(d, o, w, v) (FCLR((d), (o), (w))|F((v), (o), (w)))
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#define FSET(d, o, w) ((d)|(((1<<(w))-1)<<(o)))
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#define FMASK(o, w) (((1<<(w))-1)<<(o))
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/*
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* Sizes
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*/
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#define BY2PG (4*KiB) /* bytes per page */
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#define PGSHIFT 12 /* log(BY2PG) */
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2018-02-11 17:08:03 +00:00
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#define PGROUND(s) ROUND(s, BY2PG)
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2013-01-26 16:33:21 +00:00
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#define ROUND(s, sz) (((s)+(sz-1))&~(sz-1))
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/* max # of cpus system can run. tegra2 cpu ids are two bits wide. */
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#define MAXMACH 4
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#define MACHSIZE BY2PG
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#define L1SIZE (4 * BY2PG)
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#define KSTKSIZE (16*KiB) /* was 8K */
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#define STACKALIGN(sp) ((sp) & ~7) /* bug: assure with alloc */
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/*
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* Magic registers
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*/
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#define USER 9 /* R9 is up-> */
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#define MACH 10 /* R10 is m-> */
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/*
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* Address spaces.
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* KTZERO is used by kprof and dumpstack (if any).
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*
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* KZERO (0xc0000000) is mapped to physical 0 (start of dram).
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* u-boot claims to occupy the first 4 MB of dram, but we're willing to
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* step on it once we're loaded.
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*
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* L2 PTEs are stored in 4K before cpu0's Mach (8K to 12K above KZERO).
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* cpu0's Mach struct is at L1 - MACHSIZE(4K) to L1 (12K to 16K above KZERO).
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* L1 PTEs are stored from L1 to L1+32K (16K to 48K above KZERO).
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* plan9.ini is loaded at CONFADDR (4MB).
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* KTZERO may be anywhere after that.
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*/
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#define KSEG0 0xC0000000 /* kernel segment */
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/* mask to check segment; good for 1GB dram */
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#define KSEGM 0xC0000000
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#define KZERO KSEG0 /* kernel address space */
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#define L1 (KZERO+16*KiB) /* cpu0 l1 page table; 16KiB aligned */
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#define CONFADDR (KZERO+0x400000) /* unparsed plan9.ini */
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#define CACHECONF (CONFADDR+48*KiB)
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/* KTZERO must match loadaddr in mkfile */
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#define KTZERO (KZERO+0x410000) /* kernel text start */
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#define L2pages (2*MiB) /* high memory reserved for l2 page tables */
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#define RESRVDHIMEM (64*KiB + MiB + L2pages) /* avoid HVECTOR, l2 pages */
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/* we assume that we have 1 GB of ram, which is true for all trimslices. */
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#define DRAMSIZE GiB
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#define UZERO 0 /* user segment */
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#define UTZERO (UZERO+BY2PG) /* user text start */
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/*
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* moved USTKTOP down to 1GB to keep MMIO space out of user space.
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* moved it down another MB to utterly avoid KADDR(stack_base) mapping
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* to high exception vectors. see confinit().
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*/
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#define USTKTOP (0x40000000 - 64*KiB - MiB) /* user segment end +1 */
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#define USTKSIZE (8*1024*1024) /* user stack size */
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/* address at which to copy and execute rebootcode */
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#define REBOOTADDR KADDR(0x100)
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/*
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* Legacy...
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*/
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#define BLOCKALIGN CACHELINESZ /* only used in allocb.c */
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#define KSTACK KSTKSIZE
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/*
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* Sizes
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*/
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#define BI2BY 8 /* bits per byte */
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#define BY2SE 4
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#define BY2WD 4
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#define BY2V 8 /* only used in xalloc.c */
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#define CACHELINESZ 32 /* bytes per cache line */
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#define PTEMAPMEM (1024*1024)
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#define PTEPERTAB (PTEMAPMEM/BY2PG)
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#define SEGMAPSIZE 1984 /* magic 16*124 */
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#define SSEGMAPSIZE 16 /* magic */
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#define PPN(x) ((x)&~(BY2PG-1)) /* pure page number? */
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/*
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* With a little work these move to port.
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*/
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#define PTEVALID (1<<0)
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#define PTERONLY 0
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#define PTEWRITE (1<<1)
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#define PTEUNCACHED (1<<2)
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#define PTEKERNEL (1<<3)
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/*
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* Physical machine information from here on.
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*/
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#define PHYSDRAM 0
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#define PHYSIO 0x50000000 /* cpu */
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#define VIRTIO PHYSIO
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#define PHYSL2BAG 0x50043000 /* l2 cache bag-on-the-side */
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#define PHYSEVP 0x6000f100 /* undocumented `exception vector' */
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#define PHYSCONS 0x70006000 /* uart console */
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#define PHYSIOEND 0xc0000000 /* end of ahb mem & pcie */
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#define PHYSAHB 0xc0000000 /* ahb bus */
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#define VIRTAHB 0xb0000000
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#define P2VAHB(pa) ((pa) - PHYSAHB + VIRTAHB)
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#define PHYSNOR 0xd0000000
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#define VIRTNOR 0x40000000
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