223 lines
4.9 KiB
C
223 lines
4.9 KiB
C
/* @(#)param.h 1.1 94/10/31 SMI */
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/*
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* Copyright (c) 1988 by Sun Microsystems, Inc.
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*
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* This file is intended to contain the basic
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* specific details of a given architecture.
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*/
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#ifndef _sun4c_param_h
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#define _sun4c_param_h
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/*
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* Machine dependent constants for Sun4c.
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*/
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/*
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* The following symbols are required for the Sun4c architecture.
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* OPENPROMS # Open Boot Prom interface
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* MEMSEG # uses 4.1 style memory segments
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* NEWDUMP # uses sparse crash dumping scheme
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* SAIO_COMPAT # OBP uses "bootparam" interface
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*/
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#define OPENPROMS
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#define MEMSEG
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#define NEWDUMP
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#define SAIO_COMPAT
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#ifdef MULTIPROCESSOR
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#define NCPU 4
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#else
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#define NCPU 1
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#endif
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/*
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* All the Sun-4c machines have Virtual Address Cache.
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* So we define VAC here.
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*/
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#define VAC
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/*
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* Define the FPU symbol if we could run on a machine with an external
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* FPU (i.e. not integrated with the normal machine state like the vax).
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*/
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#define FPU
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/*
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* Define the MMU_3LEVEL symbol if we could run on a machine with
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* a three level mmu. We also assume these machines have region
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* and user cache flush operations.
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*/
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/* none at present */
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/*
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* Define IOC if we could run on machines that have an I/O cache.
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*/
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/* none at present */
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/*
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* Define BCOPY_BUF if we could run on machines that have a bcopy buffer.
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*/
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/* none at present */
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/*
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* All the Sun-4c machines have a hole in the virtual address space.
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* So we define VA_HOLE here.
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*/
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#define VA_HOLE
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/*
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* MMU_PAGES* describes the physical page size used by the mapping hardware.
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* PAGES* describes the logical page size used by the system.
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*/
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#define MMU_PAGESIZE 0x1000 /* 4096 bytes */
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#define MMU_PAGESHIFT 12 /* log2(MMU_PAGESIZE) */
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#define MMU_PAGEOFFSET (MMU_PAGESIZE-1) /* Mask of address bits in page */
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#define MMU_PAGEMASK (~MMU_PAGEOFFSET)
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#define PAGESIZE 0x1000 /* All of the above, for logical */
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#define PAGESHIFT 12
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#define PAGEOFFSET (PAGESIZE - 1)
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#define PAGEMASK (~PAGEOFFSET)
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/*
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* DATA_ALIGN is used to define the alignment of the Unix data segment.
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* We leave this 8K so we are Sun4 binary compatible.
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*/
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#define DATA_ALIGN 0x2000
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/*
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* Some random macros for units conversion.
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*/
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/*
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* MMU pages to bytes, and back (with and without rounding)
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*/
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#define mmu_ptob(x) ((x) << MMU_PAGESHIFT)
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#define mmu_btop(x) (((unsigned)(x)) >> MMU_PAGESHIFT)
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#define mmu_btopr(x) ((((unsigned)(x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT))
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/*
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* pages to bytes, and back (with and without rounding)
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*/
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#define ptob(x) ((x) << PAGESHIFT)
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#define btop(x) (((unsigned)(x)) >> PAGESHIFT)
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#define btopr(x) ((((unsigned)(x) + PAGEOFFSET) >> PAGESHIFT))
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/*
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* 2 versions of pages to disk blocks
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*/
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#define mmu_ptod(x) ((x) << (MMU_PAGESHIFT - DEV_BSHIFT))
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#define ptod(x) ((x) << (PAGESHIFT - DEV_BSHIFT))
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/*
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* Delay units are in microseconds.
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*/
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#define DELAY(n) usec_delay(n)
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#define CDELAY(c, n) \
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{ \
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register int N = n; \
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while (--N > 0) { \
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if (c) \
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break; \
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usec_delay(1); \
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} \
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}
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/*
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* Size of u-area and kernel stack in u-area.
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*/
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#define UPAGES 4 /* pages of u-area, NOT including red zone */
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#define KERNSTACK 0x3000 /* size of kernel stack in u-area */
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/*
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* KERNSIZE the amount of vitual address space the kernel
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* uses in all contexts.
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*/
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#define KERNELSIZE (128*1024*1024)
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/*
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* KERNELBASE is the virtual address which
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* the kernel text/data mapping starts in all contexts.
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*/
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#define KERNELBASE (0-KERNELSIZE)
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/*
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* SYSBASE is the virtual address which
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* the kernel allocated memory mapping starts in all contexts.
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*/
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#define SYSBASE (0-(16*1024*1024))
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/*
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* MBPOOLBYTES gives the amount of virtual space to reserve for mbuf
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* storage.
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*/
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#define MBPOOLBYTES (2*1024*1024)
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#define MBPOOLMMUPAGES (MBPOOLBYTES / MMU_PAGESIZE)
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/*
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* GX_BASE - GX_LIMIT: Maximal range that PROM
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* may need for frame buffers.
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* XXX This should not be hard coded (1060915)
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*/
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#define GX_LIMIT SYSBASE
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#define GX_BASE (SYSBASE - PROMAUXMAPSIZE)
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/*
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* BUFBYTES: Maximal size of Disk Buffer Cache
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* BUFBASE - BUFLIMIT: Disk Buffer Cache
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*/
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#define BUFBYTES (2*1024*1024)
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#define BUFPAGES (BUFBYTES / MMU_PAGESIZE)
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#define BUFLIMIT GX_BASE
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#define BUFBASE (BUFLIMIT - BUFBYTES)
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/*
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* HEAPBYTES: Maximal size of Kernel Heap
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* HEAPBASE - HEAPLIMIT: Kernel Heap
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*/
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#define HEAPBYTES (16*1024*1024)
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#define HEAPPAGES (HEAPBYTES / MMU_PAGESIZE)
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#define HEAPLIMIT BUFBASE
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#define HEAPBASE (HEAPLIMIT - HEAPBYTES)
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/*
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* Msgbuf size.
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*/
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#define MSG_BSIZE ((8 * 1024) - sizeof (struct msgbuf_hd))
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/*
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* XXX - Macros for compatibility
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*/
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/* Clicks (MMU PAGES) to disk blocks */
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#define ctod(x) mmu_ptod(x)
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/* Clicks (MMU PAGES) to bytes, and back (with rounding) */
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#define ctob(x) mmu_ptob(x)
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#define btoc(x) mmu_btopr(x)
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/*
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* XXX - Old names for some backwards compatibility
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*/
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#define NBPG MMU_PAGESIZE
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#define PGOFSET MMU_PAGEOFFSET
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#define PGSHIFT MMU_PAGESHIFT
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#define CLSIZE 1
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#define CLSIZELOG2 0
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#define CLBYTES PAGESIZE
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#define CLOFSET PAGEOFFSET
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#define CLSHIFT PAGESHIFT
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#define clrnd(i) (i)
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#endif /* !_sun4c_param_h */
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