Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Move the bus_* functions from machdep.c to bus.c .

Browse Source
This commit is contained in:
leo 1998-03-13 21:05:10 +00:00
parent a830b47531
commit 4e466a839d
3 changed files with 712 additions and 668 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

709
sys/arch/atari/atari/bus.c Normal file
View File

@ -0,0 +1,709 @@
/* $NetBSD: bus.c,v 1.1 1998/03/13 21:05:10 leo Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center and by Chris G. Demetriou.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <machine/cpu.h>
#include <m68k/cacheops.h>
#include <machine/bus.h>
static int _bus_dmamap_load_buffer __P((bus_dma_tag_t tag, bus_dmamap_t,
void *, bus_size_t, struct proc *, int, vm_offset_t *,
int *, int));
static int _bus_dmamem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size,
bus_size_t alignment, bus_size_t boundary,
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
vm_offset_t low, vm_offset_t high));
extern vm_offset_t avail_end;
int
bus_space_map(t, bpa, size, flags, mhp)
bus_space_tag_t t;
bus_addr_t bpa;
bus_size_t size;
int flags;
bus_space_handle_t *mhp;
{
vm_offset_t va;
u_long pa, endpa;
pa = m68k_trunc_page(bpa + t);
endpa = m68k_round_page((bpa + t + size) - 1);
#ifdef DIAGNOSTIC
if (endpa <= pa)
panic("bus_mem_map: overflow");
#endif
va = kmem_alloc_pageable(kernel_map, endpa - pa);
if (va == 0)
return 1;
*mhp = (caddr_t)(va + (bpa & PGOFSET));
for(; pa < endpa; pa += NBPG, va += NBPG) {
pmap_enter(pmap_kernel(), (vm_offset_t)va, pa,
VM_PROT_READ|VM_PROT_WRITE, TRUE);
if (!(flags & BUS_SPACE_MAP_CACHEABLE))
pmap_changebit(pa, PG_CI, TRUE);
}
return (0);
}
void
bus_space_unmap(t, memh, size)
bus_space_tag_t t;
bus_space_handle_t memh;
bus_size_t size;
{
vm_offset_t va, endva;
va = m68k_trunc_page(memh);
endva = m68k_round_page((memh + size) - 1);
#ifdef DIAGNOSTIC
if (endva < va)
panic("unmap_iospace: overflow");
#endif
kmem_free(kernel_map, va, endva - va);
}
/*
* Get a new handle for a subregion of an already-mapped area of bus space.
*/
int bus_space_subregion(t, memh, off, sz, mhp)
bus_space_tag_t t;
bus_space_handle_t memh;
bus_size_t off, sz;
bus_space_handle_t *mhp;
{
*mhp = memh + off;
return 0;
}
/*
* Common function for DMA map creation. May be called by bus-specific
* DMA map creation functions.
*/
int
bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, flags, dmamp)
bus_dma_tag_t t;
bus_size_t size;
int nsegments;
bus_size_t maxsegsz;
bus_size_t boundary;
int flags;
bus_dmamap_t *dmamp;
{
struct atari_bus_dmamap *map;
void *mapstore;
size_t mapsize;
/*
* Allocate and initialize the DMA map. The end of the map
* is a variable-sized array of segments, so we allocate enough
* room for them in one shot.
*
* Note we don't preserve the WAITOK or NOWAIT flags. Preservation
* of ALLOCNOW notifies others that we've reserved these resources,
* and they are not to be freed.
*
* The bus_dmamap_t includes one bus_dma_segment_t, hence
* the (nsegments - 1).
*/
mapsize = sizeof(struct atari_bus_dmamap) +
(sizeof(bus_dma_segment_t) * (nsegments - 1));
if ((mapstore = malloc(mapsize, M_DMAMAP,
(flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL)
return (ENOMEM);
bzero(mapstore, mapsize);
map = (struct atari_bus_dmamap *)mapstore;
map->_dm_size = size;
map->_dm_segcnt = nsegments;
map->_dm_maxsegsz = maxsegsz;
map->_dm_boundary = boundary;
map->_dm_flags = flags & ~(BUS_DMA_WAITOK|BUS_DMA_NOWAIT);
map->dm_mapsize = 0; /* no valid mappings */
map->dm_nsegs = 0;
*dmamp = map;
return (0);
}
/*
* Common function for DMA map destruction. May be called by bus-specific
* DMA map destruction functions.
*/
void
bus_dmamap_destroy(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
free(map, M_DMAMAP);
}
/*
* Common function for loading a DMA map with a linear buffer. May
* be called by bus-specific DMA map load functions.
*/
int
bus_dmamap_load(t, map, buf, buflen, p, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
{
vm_offset_t lastaddr;
int seg, error;
/*
* Make sure that on error condition we return "no valid mappings".
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
if (buflen > map->_dm_size)
return (EINVAL);
seg = 0;
error = _bus_dmamap_load_buffer(t, map, buf, buflen, p, flags,
&lastaddr, &seg, 1);
if (error == 0) {
map->dm_mapsize = buflen;
map->dm_nsegs = seg + 1;
}
return (error);
}
/*
* Like _bus_dmamap_load(), but for mbufs.
*/
int
bus_dmamap_load_mbuf(t, map, m0, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct mbuf *m0;
int flags;
{
vm_offset_t lastaddr;
int seg, error, first;
struct mbuf *m;
/*
* Make sure that on error condition we return "no valid mappings."
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
#ifdef DIAGNOSTIC
if ((m0->m_flags & M_PKTHDR) == 0)
panic("_bus_dmamap_load_mbuf: no packet header");
#endif
if (m0->m_pkthdr.len > map->_dm_size)
return (EINVAL);
first = 1;
seg = 0;
error = 0;
for (m = m0; m != NULL && error == 0; m = m->m_next) {
error = _bus_dmamap_load_buffer(t, map, m->m_data, m->m_len,
NULL, flags, &lastaddr, &seg, first);
first = 0;
}
if (error == 0) {
map->dm_mapsize = m0->m_pkthdr.len;
map->dm_nsegs = seg + 1;
}
return (error);
}
/*
* Like _bus_dmamap_load(), but for uios.
*/
int
bus_dmamap_load_uio(t, map, uio, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct uio *uio;
int flags;
{
panic("bus_dmamap_load_uio: not implemented");
}
/*
* Like _bus_dmamap_load(), but for raw memory allocated with
* bus_dmamem_alloc().
*/
int
bus_dmamap_load_raw(t, map, segs, nsegs, size, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_dma_segment_t *segs;
int nsegs;
bus_size_t size;
int flags;
{
panic("bus_dmamap_load_raw: not implemented");
}
/*
* Common function for unloading a DMA map. May be called by
* bus-specific DMA map unload functions.
*/
void
bus_dmamap_unload(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
/*
* No resources to free; just mark the mappings as
* invalid.
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
}
/*
* Common function for DMA map synchronization. May be called
* by bus-specific DMA map synchronization functions.
*/
void
bus_dmamap_sync(t, map, off, len, ops)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_addr_t off;
bus_size_t len;
int ops;
{
int i, pa_off, inc, seglen;
u_long pa, end_pa;
#if !defined(M68040) && !defined(M68060)
return;
#endif
if (t == BUS_PCI_DMA_TAG)
pa_off = 0x80000000; /* XXX */
else pa_off = 0;
/* Flush granularity */
inc = (len > 1024) ? NBPG : 16;
for (i = 0; i < map->dm_nsegs && len > 0; i++) {
if (map->dm_segs[i].ds_len <= off) {
/* Segment irrelevant - before requested offset */
off -= map->dm_segs[i].ds_len;
continue;
}
seglen = map->dm_segs[i].ds_len - off;
if (seglen > len)
seglen = len;
len -= seglen;
pa = map->dm_segs[i].ds_addr + off - pa_off;
end_pa = pa + seglen;
if (inc == 16) {
pa &= ~15;
while (pa < end_pa) {
DCFL(pa);
pa += 16;
}
} else {
pa &= ~PGOFSET;
while (pa < end_pa) {
DCFP(pa);
pa += NBPG;
}
}
}
}
/*
* Common function for DMA-safe memory allocation. May be called
* by bus-specific DMA memory allocation functions.
*/
int
bus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags)
bus_dma_tag_t t;
bus_size_t size, alignment, boundary;
bus_dma_segment_t *segs;
int nsegs;
int *rsegs;
int flags;
{
return (_bus_dmamem_alloc_range(t, size, alignment, boundary,
segs, nsegs, rsegs, flags, 0, trunc_page(avail_end)));
}
/*
* Common function for freeing DMA-safe memory. May be called by
* bus-specific DMA memory free functions.
*/
void
bus_dmamem_free(t, segs, nsegs)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
{
vm_page_t m;
bus_addr_t addr, offset;
struct pglist mlist;
int curseg;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
/*
* Build a list of pages to free back to the VM system.
*/
TAILQ_INIT(&mlist);
for (curseg = 0; curseg < nsegs; curseg++) {
for (addr = segs[curseg].ds_addr;
addr < (segs[curseg].ds_addr + segs[curseg].ds_len);
addr += PAGE_SIZE) {
m = PHYS_TO_VM_PAGE(addr - offset);
TAILQ_INSERT_TAIL(&mlist, m, pageq);
}
}
#if defined(UVM)
uvm_pglistfree(&mlist);
#else
vm_page_free_memory(&mlist);
#endif
}
/*
* Common function for mapping DMA-safe memory. May be called by
* bus-specific DMA memory map functions.
*/
int
bus_dmamem_map(t, segs, nsegs, size, kvap, flags)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
size_t size;
caddr_t *kvap;
int flags;
{
vm_offset_t va;
bus_addr_t addr, offset;
int curseg;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
size = round_page(size);
#if defined(UVM)
va = uvm_km_valloc(kernel_map, size);
#else
va = kmem_alloc_pageable(kernel_map, size);
#endif
if (va == 0)
return (ENOMEM);
*kvap = (caddr_t)va;
for (curseg = 0; curseg < nsegs; curseg++) {
for (addr = segs[curseg].ds_addr;
addr < (segs[curseg].ds_addr + segs[curseg].ds_len);
addr += NBPG, va += NBPG, size -= NBPG) {
if (size == 0)
panic("_bus_dmamem_map: size botch");
#if defined(PMAP_NEW)
pmap_kenter_pa(va, addr - offset,
VM_PROT_READ | VM_PROT_WRITE);
#else
pmap_enter(pmap_kernel(), va, addr - offset,
VM_PROT_READ | VM_PROT_WRITE, TRUE);
#endif
}
}
return (0);
}
/*
* Common function for unmapping DMA-safe memory. May be called by
* bus-specific DMA memory unmapping functions.
*/
void
bus_dmamem_unmap(t, kva, size)
bus_dma_tag_t t;
caddr_t kva;
size_t size;
{
#ifdef DIAGNOSTIC
if ((u_long)kva & PGOFSET)
panic("_bus_dmamem_unmap");
#endif
size = round_page(size);
#if defined(UVM)
uvm_km_free(kernel_map, (vm_offset_t)kva, size);
#else
kmem_free(kernel_map, (vm_offset_t)kva, size);
#endif
}
/*
* Common functin for mmap(2)'ing DMA-safe memory. May be called by
* bus-specific DMA mmap(2)'ing functions.
*/
int
bus_dmamem_mmap(t, segs, nsegs, off, prot, flags)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs, off, prot, flags;
{
int i, offset;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
for (i = 0; i < nsegs; i++) {
#ifdef DIAGNOSTIC
if (off & PGOFSET)
panic("_bus_dmamem_mmap: offset unaligned");
if (segs[i].ds_addr & PGOFSET)
panic("_bus_dmamem_mmap: segment unaligned");
if (segs[i].ds_len & PGOFSET)
panic("_bus_dmamem_mmap: segment size not multiple"
" of page size");
#endif
if (off >= segs[i].ds_len) {
off -= segs[i].ds_len;
continue;
}
return (m68k_btop((caddr_t)segs[i].ds_addr - offset + off));
}
/* Page not found. */
return (-1);
}
/**********************************************************************
* DMA utility functions
**********************************************************************/
/*
* Utility function to load a linear buffer. lastaddrp holds state
* between invocations (for multiple-buffer loads). segp contains
* the starting segment on entrace, and the ending segment on exit.
* first indicates if this is the first invocation of this function.
*/
static int
_bus_dmamap_load_buffer(t, map, buf, buflen, p, flags, lastaddrp, segp, first)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
vm_offset_t *lastaddrp;
int *segp;
int first;
{
bus_size_t sgsize;
bus_addr_t curaddr, lastaddr, offset;
caddr_t vaddr = buf;
int seg;
pmap_t pmap;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
if (p != NULL)
pmap = p->p_vmspace->vm_map.pmap;
else
pmap = pmap_kernel();
lastaddr = *lastaddrp;
for (seg = *segp; buflen > 0 && seg < map->_dm_segcnt; ) {
/*
* Get the physical address for this segment.
*/
curaddr = (bus_addr_t)pmap_extract(pmap, (vm_offset_t)vaddr);
/*
* Compute the segment size, and adjust counts.
*/
sgsize = NBPG - ((u_long)vaddr & PGOFSET);
if (buflen < sgsize)
sgsize = buflen;
/*
* Insert chunk into a segment, coalescing with
* previous segment if possible.
*/
if (first) {
map->dm_segs[seg].ds_addr = curaddr + offset;
map->dm_segs[seg].ds_len = sgsize;
first = 0;
} else {
if (curaddr == lastaddr &&
(map->dm_segs[seg].ds_len + sgsize) <=
map->_dm_maxsegsz)
map->dm_segs[seg].ds_len += sgsize;
else {
seg++;
map->dm_segs[seg].ds_addr = curaddr + offset;
map->dm_segs[seg].ds_len = sgsize;
}
}
lastaddr = curaddr + sgsize;
vaddr += sgsize;
buflen -= sgsize;
}
*segp = seg;
*lastaddrp = lastaddr;
/*
* Did we fit?
*/
if (buflen != 0)
return (EFBIG); /* XXX better return value here? */
return (0);
}
/*
* Allocate physical memory from the given physical address range.
* Called by DMA-safe memory allocation methods.
*/
static int
_bus_dmamem_alloc_range(t, size, alignment, boundary, segs, nsegs, rsegs,
flags, low, high)
bus_dma_tag_t t;
bus_size_t size, alignment, boundary;
bus_dma_segment_t *segs;
int nsegs;
int *rsegs;
int flags;
vm_offset_t low;
vm_offset_t high;
{
vm_offset_t curaddr, lastaddr;
bus_addr_t offset;
vm_page_t m;
struct pglist mlist;
int curseg, error;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
/* Always round the size. */
size = round_page(size);
/*
* Allocate pages from the VM system.
*/
TAILQ_INIT(&mlist);
#if defined(UVM)
error = uvm_pglistalloc(size, low, high, alignment, boundary,
&mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0);
#else
error = vm_page_alloc_memory(size, low, high,
alignment, boundary, &mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0);
#endif
if (error)
return (error);
/*
* Compute the location, size, and number of segments actually
* returned by the VM code.
*/
m = mlist.tqh_first;
curseg = 0;
lastaddr = VM_PAGE_TO_PHYS(m);
segs[curseg].ds_addr = lastaddr + offset;
segs[curseg].ds_len = PAGE_SIZE;
m = m->pageq.tqe_next;
for (; m != NULL; m = m->pageq.tqe_next) {
curaddr = VM_PAGE_TO_PHYS(m);
#ifdef DIAGNOSTIC
if (curaddr < low || curaddr >= high) {
printf("vm_page_alloc_memory returned non-sensical"
" address 0x%lx\n", curaddr);
panic("_bus_dmamem_alloc_range");
}
#endif
if (curaddr == (lastaddr + PAGE_SIZE))
segs[curseg].ds_len += PAGE_SIZE;
else {
curseg++;
segs[curseg].ds_addr = curaddr + offset;
segs[curseg].ds_len = PAGE_SIZE;
}
lastaddr = curaddr;
}
*rsegs = curseg + 1;
return (0);
}

668
sys/arch/atari/atari/machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.59 1998/03/10 11:42:53 leo Exp $ */
/* $NetBSD: machdep.c,v 1.60 1998/03/13 21:05:10 leo Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -75,18 +75,10 @@
#include <net/netisr.h>
#define MAXMEM 64*1024*CLSIZE /* XXX - from cmap.h */
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <sys/sysctl.h>
#include <m68k/cpu.h>
#include <m68k/cacheops.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
@ -95,21 +87,11 @@
#include <machine/reg.h>
#include <machine/psl.h>
#include <machine/pte.h>
#include <machine/iomap.h>
#include <machine/bus.h>
#include <dev/cons.h>
static void bootsync __P((void));
static void call_sicallbacks __P((void));
static int _bus_dmamap_load_buffer __P((bus_dma_tag_t tag, bus_dmamap_t,
void *, bus_size_t, struct proc *, int, vm_offset_t *,
int *, int));
static int _bus_dmamem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size,
bus_size_t alignment, bus_size_t boundary,
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
vm_offset_t low, vm_offset_t high));
static void identifycpu __P((void));
static void netintr __P((void));
void straymfpint __P((int, u_short));
@ -1084,651 +1066,3 @@ cpu_exec_aout_makecmds(p, epp)
return(error);
}
int
bus_space_map(t, bpa, size, flags, mhp)
bus_space_tag_t t;
bus_addr_t bpa;
bus_size_t size;
int flags;
bus_space_handle_t *mhp;
{
vm_offset_t va;
u_long pa, endpa;
pa = m68k_trunc_page(bpa + t);
endpa = m68k_round_page((bpa + t + size) - 1);
#ifdef DIAGNOSTIC
if (endpa <= pa)
panic("bus_mem_map: overflow");
#endif
va = kmem_alloc_pageable(kernel_map, endpa - pa);
if (va == 0)
return 1;
*mhp = (caddr_t)(va + (bpa & PGOFSET));
for(; pa < endpa; pa += NBPG, va += NBPG) {
pmap_enter(pmap_kernel(), (vm_offset_t)va, pa,
VM_PROT_READ|VM_PROT_WRITE, TRUE);
if (!(flags & BUS_SPACE_MAP_CACHEABLE))
pmap_changebit(pa, PG_CI, TRUE);
}
return (0);
}
void
bus_space_unmap(t, memh, size)
bus_space_tag_t t;
bus_space_handle_t memh;
bus_size_t size;
{
vm_offset_t va, endva;
va = m68k_trunc_page(memh);
endva = m68k_round_page((memh + size) - 1);
#ifdef DIAGNOSTIC
if (endva < va)
panic("unmap_iospace: overflow");
#endif
kmem_free(kernel_map, va, endva - va);
}
/*
* Get a new handle for a subregion of an already-mapped area of bus space.
*/
int bus_space_subregion(t, memh, off, sz, mhp)
bus_space_tag_t t;
bus_space_handle_t memh;
bus_size_t off, sz;
bus_space_handle_t *mhp;
{
*mhp = memh + off;
return 0;
}
/*
* Common function for DMA map creation. May be called by bus-specific
* DMA map creation functions.
*/
int
bus_dmamap_create(t, size, nsegments, maxsegsz, boundary, flags, dmamp)
bus_dma_tag_t t;
bus_size_t size;
int nsegments;
bus_size_t maxsegsz;
bus_size_t boundary;
int flags;
bus_dmamap_t *dmamp;
{
struct atari_bus_dmamap *map;
void *mapstore;
size_t mapsize;
/*
* Allocate and initialize the DMA map. The end of the map
* is a variable-sized array of segments, so we allocate enough
* room for them in one shot.
*
* Note we don't preserve the WAITOK or NOWAIT flags. Preservation
* of ALLOCNOW notifies others that we've reserved these resources,
* and they are not to be freed.
*
* The bus_dmamap_t includes one bus_dma_segment_t, hence
* the (nsegments - 1).
*/
mapsize = sizeof(struct atari_bus_dmamap) +
(sizeof(bus_dma_segment_t) * (nsegments - 1));
if ((mapstore = malloc(mapsize, M_DMAMAP,
(flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL)
return (ENOMEM);
bzero(mapstore, mapsize);
map = (struct atari_bus_dmamap *)mapstore;
map->_dm_size = size;
map->_dm_segcnt = nsegments;
map->_dm_maxsegsz = maxsegsz;
map->_dm_boundary = boundary;
map->_dm_flags = flags & ~(BUS_DMA_WAITOK|BUS_DMA_NOWAIT);
map->dm_mapsize = 0; /* no valid mappings */
map->dm_nsegs = 0;
*dmamp = map;
return (0);
}
/*
* Common function for DMA map destruction. May be called by bus-specific
* DMA map destruction functions.
*/
void
bus_dmamap_destroy(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
free(map, M_DMAMAP);
}
/*
* Common function for loading a DMA map with a linear buffer. May
* be called by bus-specific DMA map load functions.
*/
int
bus_dmamap_load(t, map, buf, buflen, p, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
{
vm_offset_t lastaddr;
int seg, error;
/*
* Make sure that on error condition we return "no valid mappings".
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
if (buflen > map->_dm_size)
return (EINVAL);
seg = 0;
error = _bus_dmamap_load_buffer(t, map, buf, buflen, p, flags,
&lastaddr, &seg, 1);
if (error == 0) {
map->dm_mapsize = buflen;
map->dm_nsegs = seg + 1;
}
return (error);
}
/*
* Like _bus_dmamap_load(), but for mbufs.
*/
int
bus_dmamap_load_mbuf(t, map, m0, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct mbuf *m0;
int flags;
{
vm_offset_t lastaddr;
int seg, error, first;
struct mbuf *m;
/*
* Make sure that on error condition we return "no valid mappings."
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
#ifdef DIAGNOSTIC
if ((m0->m_flags & M_PKTHDR) == 0)
panic("_bus_dmamap_load_mbuf: no packet header");
#endif
if (m0->m_pkthdr.len > map->_dm_size)
return (EINVAL);
first = 1;
seg = 0;
error = 0;
for (m = m0; m != NULL && error == 0; m = m->m_next) {
error = _bus_dmamap_load_buffer(t, map, m->m_data, m->m_len,
NULL, flags, &lastaddr, &seg, first);
first = 0;
}
if (error == 0) {
map->dm_mapsize = m0->m_pkthdr.len;
map->dm_nsegs = seg + 1;
}
return (error);
}
/*
* Like _bus_dmamap_load(), but for uios.
*/
int
bus_dmamap_load_uio(t, map, uio, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct uio *uio;
int flags;
{
panic("bus_dmamap_load_uio: not implemented");
}
/*
* Like _bus_dmamap_load(), but for raw memory allocated with
* bus_dmamem_alloc().
*/
int
bus_dmamap_load_raw(t, map, segs, nsegs, size, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_dma_segment_t *segs;
int nsegs;
bus_size_t size;
int flags;
{
panic("bus_dmamap_load_raw: not implemented");
}
/*
* Common function for unloading a DMA map. May be called by
* bus-specific DMA map unload functions.
*/
void
bus_dmamap_unload(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
/*
* No resources to free; just mark the mappings as
* invalid.
*/
map->dm_mapsize = 0;
map->dm_nsegs = 0;
}
/*
* Common function for DMA map synchronization. May be called
* by bus-specific DMA map synchronization functions.
*/
void
bus_dmamap_sync(t, map, off, len, ops)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_addr_t off;
bus_size_t len;
int ops;
{
int i, pa_off, inc, seglen;
u_long pa, end_pa;
#if !defined(M68040) && !defined(M68060)
return;
#endif
if (t == BUS_PCI_DMA_TAG)
pa_off = 0x80000000; /* XXX */
else pa_off = 0;
/* Flush granularity */
inc = (len > 1024) ? NBPG : 16;
for (i = 0; i < map->dm_nsegs && len > 0; i++) {
if (map->dm_segs[i].ds_len <= off) {
/* Segment irrelevant - before requested offset */
off -= map->dm_segs[i].ds_len;
continue;
}
seglen = map->dm_segs[i].ds_len - off;
if (seglen > len)
seglen = len;
len -= seglen;
pa = map->dm_segs[i].ds_addr + off - pa_off;
end_pa = pa + seglen;
if (inc == 16) {
pa &= ~15;
while (pa < end_pa) {
DCFL(pa);
pa += 16;
}
} else {
pa &= ~PGOFSET;
while (pa < end_pa) {
DCFP(pa);
pa += NBPG;
}
}
}
}
/*
* Common function for DMA-safe memory allocation. May be called
* by bus-specific DMA memory allocation functions.
*/
int
bus_dmamem_alloc(t, size, alignment, boundary, segs, nsegs, rsegs, flags)
bus_dma_tag_t t;
bus_size_t size, alignment, boundary;
bus_dma_segment_t *segs;
int nsegs;
int *rsegs;
int flags;
{
return (_bus_dmamem_alloc_range(t, size, alignment, boundary,
segs, nsegs, rsegs, flags, 0, trunc_page(avail_end)));
}
/*
* Common function for freeing DMA-safe memory. May be called by
* bus-specific DMA memory free functions.
*/
void
bus_dmamem_free(t, segs, nsegs)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
{
vm_page_t m;
bus_addr_t addr, offset;
struct pglist mlist;
int curseg;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
/*
* Build a list of pages to free back to the VM system.
*/
TAILQ_INIT(&mlist);
for (curseg = 0; curseg < nsegs; curseg++) {
for (addr = segs[curseg].ds_addr;
addr < (segs[curseg].ds_addr + segs[curseg].ds_len);
addr += PAGE_SIZE) {
m = PHYS_TO_VM_PAGE(addr - offset);
TAILQ_INSERT_TAIL(&mlist, m, pageq);
}
}
#if defined(UVM)
uvm_pglistfree(&mlist);
#else
vm_page_free_memory(&mlist);
#endif
}
/*
* Common function for mapping DMA-safe memory. May be called by
* bus-specific DMA memory map functions.
*/
int
bus_dmamem_map(t, segs, nsegs, size, kvap, flags)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs;
size_t size;
caddr_t *kvap;
int flags;
{
vm_offset_t va;
bus_addr_t addr, offset;
int curseg;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
size = round_page(size);
#if defined(UVM)
va = uvm_km_valloc(kernel_map, size);
#else
va = kmem_alloc_pageable(kernel_map, size);
#endif
if (va == 0)
return (ENOMEM);
*kvap = (caddr_t)va;
for (curseg = 0; curseg < nsegs; curseg++) {
for (addr = segs[curseg].ds_addr;
addr < (segs[curseg].ds_addr + segs[curseg].ds_len);
addr += NBPG, va += NBPG, size -= NBPG) {
if (size == 0)
panic("_bus_dmamem_map: size botch");
#if defined(PMAP_NEW)
pmap_kenter_pa(va, addr - offset,
VM_PROT_READ | VM_PROT_WRITE);
#else
pmap_enter(pmap_kernel(), va, addr - offset,
VM_PROT_READ | VM_PROT_WRITE, TRUE);
#endif
}
}
return (0);
}
/*
* Common function for unmapping DMA-safe memory. May be called by
* bus-specific DMA memory unmapping functions.
*/
void
bus_dmamem_unmap(t, kva, size)
bus_dma_tag_t t;
caddr_t kva;
size_t size;
{
#ifdef DIAGNOSTIC
if ((u_long)kva & PGOFSET)
panic("_bus_dmamem_unmap");
#endif
size = round_page(size);
#if defined(UVM)
uvm_km_free(kernel_map, (vm_offset_t)kva, size);
#else
kmem_free(kernel_map, (vm_offset_t)kva, size);
#endif
}
/*
* Common functin for mmap(2)'ing DMA-safe memory. May be called by
* bus-specific DMA mmap(2)'ing functions.
*/
int
bus_dmamem_mmap(t, segs, nsegs, off, prot, flags)
bus_dma_tag_t t;
bus_dma_segment_t *segs;
int nsegs, off, prot, flags;
{
int i, offset;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
for (i = 0; i < nsegs; i++) {
#ifdef DIAGNOSTIC
if (off & PGOFSET)
panic("_bus_dmamem_mmap: offset unaligned");
if (segs[i].ds_addr & PGOFSET)
panic("_bus_dmamem_mmap: segment unaligned");
if (segs[i].ds_len & PGOFSET)
panic("_bus_dmamem_mmap: segment size not multiple"
" of page size");
#endif
if (off >= segs[i].ds_len) {
off -= segs[i].ds_len;
continue;
}
return (m68k_btop((caddr_t)segs[i].ds_addr - offset + off));
}
/* Page not found. */
return (-1);
}
/**********************************************************************
* DMA utility functions
**********************************************************************/
/*
* Utility function to load a linear buffer. lastaddrp holds state
* between invocations (for multiple-buffer loads). segp contains
* the starting segment on entrace, and the ending segment on exit.
* first indicates if this is the first invocation of this function.
*/
static int
_bus_dmamap_load_buffer(t, map, buf, buflen, p, flags, lastaddrp, segp, first)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
vm_offset_t *lastaddrp;
int *segp;
int first;
{
bus_size_t sgsize;
bus_addr_t curaddr, lastaddr, offset;
caddr_t vaddr = buf;
int seg;
pmap_t pmap;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
if (p != NULL)
pmap = p->p_vmspace->vm_map.pmap;
else
pmap = pmap_kernel();
lastaddr = *lastaddrp;
for (seg = *segp; buflen > 0 && seg < map->_dm_segcnt; ) {
/*
* Get the physical address for this segment.
*/
curaddr = (bus_addr_t)pmap_extract(pmap, (vm_offset_t)vaddr);
/*
* Compute the segment size, and adjust counts.
*/
sgsize = NBPG - ((u_long)vaddr & PGOFSET);
if (buflen < sgsize)
sgsize = buflen;
/*
* Insert chunk into a segment, coalescing with
* previous segment if possible.
*/
if (first) {
map->dm_segs[seg].ds_addr = curaddr + offset;
map->dm_segs[seg].ds_len = sgsize;
first = 0;
} else {
if (curaddr == lastaddr &&
(map->dm_segs[seg].ds_len + sgsize) <=
map->_dm_maxsegsz)
map->dm_segs[seg].ds_len += sgsize;
else {
seg++;
map->dm_segs[seg].ds_addr = curaddr + offset;
map->dm_segs[seg].ds_len = sgsize;
}
}
lastaddr = curaddr + sgsize;
vaddr += sgsize;
buflen -= sgsize;
}
*segp = seg;
*lastaddrp = lastaddr;
/*
* Did we fit?
*/
if (buflen != 0)
return (EFBIG); /* XXX better return value here? */
return (0);
}
/*
* Allocate physical memory from the given physical address range.
* Called by DMA-safe memory allocation methods.
*/
static int
_bus_dmamem_alloc_range(t, size, alignment, boundary, segs, nsegs, rsegs,
flags, low, high)
bus_dma_tag_t t;
bus_size_t size, alignment, boundary;
bus_dma_segment_t *segs;
int nsegs;
int *rsegs;
int flags;
vm_offset_t low;
vm_offset_t high;
{
vm_offset_t curaddr, lastaddr;
bus_addr_t offset;
vm_page_t m;
struct pglist mlist;
int curseg, error;
if (t == BUS_PCI_DMA_TAG)
offset = 0x80000000; /* XXX */
else offset = 0;
/* Always round the size. */
size = round_page(size);
/*
* Allocate pages from the VM system.
*/
TAILQ_INIT(&mlist);
#if defined(UVM)
error = uvm_pglistalloc(size, low, high, alignment, boundary,
&mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0);
#else
error = vm_page_alloc_memory(size, low, high,
alignment, boundary, &mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0);
#endif
if (error)
return (error);
/*
* Compute the location, size, and number of segments actually
* returned by the VM code.
*/
m = mlist.tqh_first;
curseg = 0;
lastaddr = VM_PAGE_TO_PHYS(m);
segs[curseg].ds_addr = lastaddr + offset;
segs[curseg].ds_len = PAGE_SIZE;
m = m->pageq.tqe_next;
for (; m != NULL; m = m->pageq.tqe_next) {
curaddr = VM_PAGE_TO_PHYS(m);
#ifdef DIAGNOSTIC
if (curaddr < low || curaddr >= high) {
printf("vm_page_alloc_memory returned non-sensical"
" address 0x%lx\n", curaddr);
panic("_bus_dmamem_alloc_range");
}
#endif
if (curaddr == (lastaddr + PAGE_SIZE))
segs[curseg].ds_len += PAGE_SIZE;
else {
curseg++;
segs[curseg].ds_addr = curaddr + offset;
segs[curseg].ds_len = PAGE_SIZE;
}
lastaddr = curaddr;
}
*rsegs = curseg + 1;
return (0);
}

3
sys/arch/atari/conf/files.atari
View File

@ -1,5 +1,5 @@
#
# $NetBSD: files.atari,v 1.47 1998/02/16 22:12:46 thorpej Exp $
# $NetBSD: files.atari,v 1.48 1998/03/13 21:05:20 leo Exp $
maxpartitions 16
@ -161,6 +161,7 @@ file dev/cons.c ite
file dev/cninit.c ite
file arch/atari/atari/atari_init.c
file arch/atari/atari/autoconf.c
file arch/atari/atari/bus.c
file arch/atari/atari/conf.c
file arch/atari/atari/disksubr.c
file arch/atari/atari/dkbad.c