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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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/*
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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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#define MAXMACH 1 /* max # cpus system can run */
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#define MACHSIZE BY2PG
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#define KSTKSIZE (8*KiB)
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#define STACKALIGN(sp) ((sp) & ~3) /* bug: assure with alloc */
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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 is mapped to physical 0 (start of ram).
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*
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* vectors are at 0, plan9.ini is at KZERO+256 and is limited to 16K by
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* devenv.
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*/
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#define KSEG0 0x80000000 /* kernel segment */
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/* mask to check segment; good for 512MB dram */
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#define KSEGM 0xE0000000
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#define KZERO KSEG0 /* kernel address space */
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#define CONFADDR (KZERO+0x100) /* unparsed plan9.ini */
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#define MACHADDR (KZERO+0x2000) /* Mach structure */
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#define L2 (KZERO+0x3000) /* L2 ptes for vectors etc */
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#define VCBUFFER (KZERO+0x3400) /* videocore mailbox buffer */
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#define FIQSTKTOP (KZERO+0x4000) /* FIQ stack */
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#define L1 (KZERO+0x4000) /* tt ptes: 16KiB aligned */
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#define KTZERO (KZERO+0x8000) /* kernel text start */
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#define VIRTIO 0x7E000000 /* i/o registers */
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#define FRAMEBUFFER 0xA0000000 /* video framebuffer */
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#define UZERO 0 /* user segment */
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#define UTZERO (UZERO+BY2PG) /* user text start */
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#define UTROUND(t) ROUNDUP((t), BY2PG)
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#define USTKTOP 0x20000000 /* user segment end +1 */
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#define USTKSIZE (8*1024*1024) /* user stack size */
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#define TSTKTOP (USTKTOP-USTKSIZE) /* sysexec temporary stack */
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#define TSTKSIZ 256
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/* address at which to copy and execute rebootcode */
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#define REBOOTADDR (KZERO+0x3400)
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/*
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* Legacy...
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*/
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#define BLOCKALIGN 32 /* 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
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#define PTEMAPMEM (1024*1024)
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#define PTEPERTAB (PTEMAPMEM/BY2PG)
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#define SEGMAPSIZE 1984
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#define SSEGMAPSIZE 16
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#define PPN(x) ((x)&~(BY2PG-1))
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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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* PHYS addresses as seen from the arm cpu.
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* BUS addresses as seen from the videocore gpu.
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*/
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#define PHYSDRAM 0
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#define BUSDRAM 0x40000000
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#define DRAMSIZE (512*MiB)
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#define PHYSIO 0x20000000
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#define BUSIO 0x7E000000
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#define IOSIZE (16*MiB)
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