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Diffstat (limited to 'sys/arch/hppa64/dev/mem.c')
| -rw-r--r-- | sys/arch/hppa64/dev/mem.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/sys/arch/hppa64/dev/mem.c b/sys/arch/hppa64/dev/mem.c new file mode 100644 index 00000000000..4b6fcc17fe0 --- /dev/null +++ b/sys/arch/hppa64/dev/mem.c @@ -0,0 +1,268 @@ +/* $OpenBSD: mem.c,v 1.1 2005/04/01 10:40:47 mickey Exp $ */ + +/* + * Copyright (c) 2005 Michael Shalayeff + * All rights reserved. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN + * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT + * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +/* + * Copyright (c) 1991,1992,1994, The University of Utah and + * the Computer Systems Laboratory (CSL). All rights reserved. + * + * Subject to your agreements with CMU, + * permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS + * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF + * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * CSL requests users of this software to return to csl-dist@cs.utah.edu any + * improvements that they make and grant CSL redistribution rights. + * + * Utah $Hdr: mem.c 1.9 94/12/16$ + */ +/* + * Mach Operating System + * Copyright (c) 1992 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/buf.h> +#include <sys/malloc.h> +#include <sys/proc.h> +#include <sys/uio.h> +#include <sys/types.h> +#include <sys/device.h> +#include <sys/errno.h> +#include <sys/ioctl.h> +#include <sys/file.h> + +#include <uvm/uvm.h> + +#include <machine/conf.h> +#include <machine/bus.h> +#include <machine/iomod.h> +#include <machine/autoconf.h> +#include <machine/pmap.h> + +struct mem_softc { + struct device sc_dev; +}; + +int memmatch(struct device *, void *, void *); +void memattach(struct device *, struct device *, void *); + +struct cfattach mem_ca = { + sizeof(struct mem_softc), memmatch, memattach +}; + +struct cfdriver mem_cd = { + NULL, "mem", DV_DULL +}; + +caddr_t zeropage; + +int +memmatch(parent, cfdata, aux) + struct device *parent; + void *cfdata; + void *aux; +{ + struct confargs *ca = aux; + + if (strcmp(ca->ca_name, "memory")) + return 0; + + return 1; +} + +void +memattach(parent, self, aux) + struct device *parent; + struct device *self; + void *aux; +{ + struct pdc_iodc_minit pdc_minit PDC_ALIGNMENT; + /* struct mem_softc *sc = (struct mem_softc *)self; */ + struct confargs *ca = aux; + int err; + +/* TODO scan the memory regions list */ + + if ((err = pdc_call((iodcio_t)pdc, 0, PDC_IODC, PDC_IODC_NINIT, + &pdc_minit, ca->ca_hpa, PAGE0->imm_spa_size)) < 0) + pdc_minit.max_spa = PAGE0->imm_max_mem; + + printf(": size %d", pdc_minit.max_spa / (1024*1024)); + if (pdc_minit.max_spa % (1024*1024)) + printf(".%d", pdc_minit.max_spa % (1024*1024)); + printf("MB\n"); +} + +int +mmopen(dev, flag, ioflag, p) + dev_t dev; + int flag; + int ioflag; + struct proc *p; +{ + return (0); +} + +/*ARGSUSED*/ +int +mmclose(dev, flag, mode, p) + dev_t dev; + int flag, mode; + struct proc *p; +{ + return (0); +} + +int +mmrw(dev, uio, flags) + dev_t dev; + struct uio *uio; + int flags; +{ + struct iovec *iov; + vaddr_t v, o; + int error = 0; + u_int c; + + while (uio->uio_resid > 0 && error == 0) { + iov = uio->uio_iov; + if (iov->iov_len == 0) { + uio->uio_iov++; + uio->uio_iovcnt--; + if (uio->uio_iovcnt < 0) + panic("mmrw"); + continue; + } + switch (minor(dev)) { + + case 0: /* /dev/mem */ + + /* If the address isn't in RAM, bail. */ + v = uio->uio_offset; + if (btoc(v) > physmem) { + error = EFAULT; + /* this will break us out of the loop */ + continue; + } + c = ctob(physmem) - v; + c = min(c, uio->uio_resid); + error = uiomove((caddr_t)v, c, uio); + break; + + case 1: /* /dev/kmem */ + v = uio->uio_offset; + o = v & PAGE_MASK; + c = min(uio->uio_resid, (int)(PAGE_SIZE - o)); + if (btoc(v) > physmem && !uvm_kernacc((caddr_t)v, + c, (uio->uio_rw == UIO_READ) ? B_READ : B_WRITE)) { + error = EFAULT; + /* this will break us out of the loop */ + continue; + } + error = uiomove((caddr_t)v, c, uio); + break; + + case 2: /* /dev/null */ + if (uio->uio_rw == UIO_WRITE) + uio->uio_resid = 0; + return (0); + + case 12: /* /dev/zero */ + /* Write to /dev/zero is ignored. */ + if (uio->uio_rw == UIO_WRITE) { + uio->uio_resid = 0; + return (0); + } + /* + * On the first call, allocate and zero a page + * of memory for use with /dev/zero. + */ + if (zeropage == NULL) { + zeropage = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); + bzero(zeropage, PAGE_SIZE); + } + c = min(iov->iov_len, PAGE_SIZE); + error = uiomove(zeropage, c, uio); + break; + + default: + return (ENXIO); + } + } + + return (error); +} + +paddr_t +mmmmap(dev, off, prot) + dev_t dev; + off_t off; + int prot; +{ + if (minor(dev) != 0) + return (-1); + + /* + * Allow access only in RAM. + */ +#if 0 + if (off < ctob(firstusablepage) || + off >= ctob(lastusablepage + 1)) + return (-1); +#endif + return (btop(off)); +} + +int +mmioctl(dev, cmd, data, flags, p) + dev_t dev; + u_long cmd; + caddr_t data; + int flags; + struct proc *p; +{ + return (EOPNOTSUPP); +} |