File: [local] / sys / arch / mvme88k / dev / mainbus.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:04:37 2008 UTC (16 years, 5 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: mainbus.c,v 1.22 2007/02/11 12:41:29 miod Exp $ */
/*
* Copyright (c) 1998 Steve Murphree, Jr.
* Copyright (c) 2004, Miodrag Vallat.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/reboot.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/extent.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/cmmu.h>
#include <machine/cpu.h>
#ifdef M88100
#include <machine/m8820x.h>
#endif
#ifdef MVME187
#include <machine/mvme187.h>
#endif
#ifdef MVME188
#include <machine/mvme188.h>
#endif
#ifdef MVME197
#include <machine/mvme197.h>
#endif
void mainbus_attach(struct device *, struct device *, void *);
int mainbus_match(struct device *, void *, void *);
int mainbus_print(void *, const char *);
int mainbus_scan(struct device *, void *, void *);
/*
* bus_space routines for 1:1 obio mappings
*/
int mainbus_map(bus_addr_t, bus_size_t, int, bus_space_handle_t *);
void mainbus_unmap(bus_space_handle_t, bus_size_t);
int mainbus_subregion(bus_space_handle_t, bus_size_t, bus_size_t,
bus_space_handle_t *);
void *mainbus_vaddr(bus_space_handle_t);
const struct mvme88k_bus_space_tag mainbus_bustag = {
mainbus_map,
mainbus_unmap,
mainbus_subregion,
mainbus_vaddr
};
bus_addr_t bs_obio_start;
bus_addr_t bs_obio_end;
struct extent *bs_extent;
/*
* Obio (internal IO) space is mapped 1:1 (see pmap_bootstrap() for details).
*
* However, sram attaches as a child of mainbus, but does not reside in
* internal IO space. As a result, we have to allow both 1:1 and regular
* translations, depending upon the address to map.
*/
int
mainbus_map(bus_addr_t addr, bus_size_t size, int flags,
bus_space_handle_t *ret)
{
vaddr_t map;
map = mapiodev((paddr_t)addr, size);
if (map == NULL)
return ENOMEM;
*ret = (bus_space_handle_t)map;
return 0;
}
void
mainbus_unmap(bus_space_handle_t handle, bus_size_t size)
{
/* XXX what to do for non-obio mappings? */
}
int
mainbus_subregion(bus_space_handle_t handle, bus_addr_t offset,
bus_size_t size, bus_space_handle_t *ret)
{
*ret = handle + offset;
return (0);
}
void *
mainbus_vaddr(bus_space_handle_t handle)
{
return (void *)handle;
}
/*
* Map a range [pa, pa+size) in the given map to a kernel address
* in iomap space.
*
* Note: To be flexible, I did not put a restriction on the alignment
* of pa. However, it is advisable to have pa page aligned since otherwise,
* we might have several mappings for a given chunk of the IO page.
*/
vaddr_t
mapiodev(paddr_t addr, int _size)
{
vaddr_t va, iova, off;
paddr_t pa, epa;
psize_t size;
int s, error;
/* sanity checks */
if (_size <= 0)
return NULL;
size = (psize_t)_size;
epa = addr + size;
if (epa < addr && epa != 0)
return NULL;
/* check for 1:1 mapping */
if (addr >= bs_obio_start) {
if (bs_obio_end == 0 || epa <= bs_obio_end)
return ((vaddr_t)addr);
else if (addr <= bs_obio_end)
/* accross obio and non-obio, not supported */
return NULL;
}
pa = trunc_page(addr);
off = addr & PGOFSET;
size = round_page(off + size);
s = splhigh();
error = extent_alloc_region(bs_extent, atop(pa), atop(size),
EX_MALLOCOK | (cold ? 0 : EX_WAITSPACE));
splx(s);
if (error != 0)
return NULL;
va = uvm_km_valloc(kernel_map, size);
if (va == 0) {
extent_free(bs_extent, atop(pa), atop(size),
EX_MALLOCOK | (cold ? 0 : EX_WAITSPACE));
return NULL;
}
iova = va + off;
while (size != 0) {
pmap_enter(pmap_kernel(), va, pa, UVM_PROT_RW,
UVM_PROT_RW | PMAP_WIRED);
size -= PAGE_SIZE;
va += PAGE_SIZE;
pa += PAGE_SIZE;
}
pmap_update(pmap_kernel());
return (iova);
}
/*
* Free up the mapping in iomap.
*/
void
unmapiodev(vaddr_t va, int _size)
{
vaddr_t eva, kva, off;
vsize_t size;
paddr_t pa;
int s, error;
/* sanity checks */
if (_size <= 0)
return;
size = (vsize_t)_size;
eva = va + size;
if (eva < va && eva != 0)
return;
/* check for 1:1 mapping */
if (va >= bs_obio_start) {
if (bs_obio_end == 0 || eva <= bs_obio_end)
return;
else if (va <= bs_obio_end)
/* accross obio and non-obio, not supported */
return;
}
off = va & PGOFSET;
kva = trunc_page(va);
size = round_page(off + size);
if (pmap_extract(pmap_kernel(), kva, &pa) == FALSE)
panic("unmapiodev(%p,%p)", kva, size);
pmap_remove(pmap_kernel(), kva, kva + size);
pmap_update(pmap_kernel());
uvm_km_free(kernel_map, kva, size);
s = splhigh();
error = extent_free(bs_extent, atop(pa), atop(size),
EX_MALLOCOK | (cold ? 0 : EX_WAITSPACE));
#ifdef DIAGNOSTIC
if (error != 0)
printf("unmapiodev(%p pa %p, %p): extent_free failed\n",
kva, pa, size);
#endif
splx(s);
}
/*
* Configuration glue
*/
struct cfattach mainbus_ca = {
sizeof(struct device), mainbus_match, mainbus_attach
};
struct cfdriver mainbus_cd = {
NULL, "mainbus", DV_DULL
};
int
mainbus_match(struct device *parent, void *cf, void *args)
{
return (1);
}
int
mainbus_print(void *args, const char *bus)
{
struct confargs *ca = args;
if (ca->ca_paddr != -1)
printf(" addr 0x%x", ca->ca_paddr);
return (UNCONF);
}
int
mainbus_scan(struct device *parent, void *child, void *args)
{
struct cfdata *cf = child;
struct confargs oca;
bzero(&oca, sizeof oca);
oca.ca_iot = &mainbus_bustag;
oca.ca_dmat = 0; /* XXX no need for a meaningful value yet */
oca.ca_bustype = BUS_MAIN;
oca.ca_paddr = cf->cf_loc[0];
oca.ca_ipl = -1;
oca.ca_name = cf->cf_driver->cd_name;
if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0)
return (0);
config_attach(parent, cf, &oca, mainbus_print);
return (1);
}
void
mainbus_attach(struct device *parent, struct device *self, void *args)
{
extern char cpu_model[];
printf(": %s\n", cpu_model);
/*
* Display cpu/mmu details for the main processor.
*/
cpu_configuration_print(1);
/*
* Initialize an extent to keep track of I/O mappings.
*/
#ifdef M88100
if (CPU_IS88100) {
bs_obio_start = BATC8_VA; /* hardwired BATC */
bs_obio_end = 0;
}
#endif
#ifdef MVME197
if (CPU_IS88110) {
bs_obio_start = OBIO197_START;
bs_obio_end = OBIO197_START + OBIO197_SIZE;
}
#endif
bs_extent = extent_create("bus_space", atop(physmem),
1 + atop(0U - PAGE_SIZE), M_DEVBUF, NULL, 0, EX_NOWAIT);
if (bs_extent == NULL)
panic("unable to allocate bus_space extent");
(void)config_search(mainbus_scan, self, args);
}