#include <machine/rtems-bsd-kernel-space.h>
/*-
* Copyright (c) 2015 Ian Lepore <ian@freebsd.org>
* All rights reserved.
*
* 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 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 AUTHOR 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.
*
* The initial ofw_reg_to_paddr() implementation has been copied from powerpc
* ofw_machdep.c OF_decode_addr(). It was added by Marcel Moolenaar, who did not
* assert copyright with the addition but still deserves credit for the work.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/boot.h>
#include <sys/bus.h>
#include <sys/libkern.h>
#include <sys/reboot.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pci.h>
#include <dev/ofw/ofw_subr.h>
static void
get_addr_props(phandle_t node, uint32_t *addrp, uint32_t *sizep, int *pcip)
{
char type[64];
uint32_t addr, size;
int pci, res;
res = OF_getencprop(node, "#address-cells", &addr, sizeof(addr));
if (res == -1)
addr = 2;
res = OF_getencprop(node, "#size-cells", &size, sizeof(size));
if (res == -1)
size = 1;
pci = 0;
if (addr == 3 && size == 2) {
res = OF_getprop(node, "device_type", type, sizeof(type));
if (res != -1) {
type[sizeof(type) - 1] = '\0';
if (strcmp(type, "pci") == 0 ||
strcmp(type, "pciex")== 0)
pci = 1;
}
}
if (addrp != NULL)
*addrp = addr;
if (sizep != NULL)
*sizep = size;
if (pcip != NULL)
*pcip = pci;
}
int
ofw_reg_to_paddr(phandle_t dev, int regno, bus_addr_t *paddr,
bus_size_t *psize, pcell_t *ppci_hi)
{
pcell_t cell[32], pci_hi;
uint64_t addr, raddr, baddr;
uint64_t size, rsize;
uint32_t c, nbridge, naddr, nsize;
phandle_t bridge, parent;
u_int spc, rspc;
int pci, pcib, res;
/* Sanity checking. */
if (dev == 0)
return (EINVAL);
bridge = OF_parent(dev);
if (bridge == 0)
return (EINVAL);
if (regno < 0)
return (EINVAL);
if (paddr == NULL || psize == NULL)
return (EINVAL);
get_addr_props(bridge, &naddr, &nsize, &pci);
res = OF_getencprop(dev, (pci) ? "assigned-addresses" : "reg",
cell, sizeof(cell));
if (res == -1)
return (ENXIO);
if (res % sizeof(cell[0]))
return (ENXIO);
res /= sizeof(cell[0]);
regno *= naddr + nsize;
if (regno + naddr + nsize > res)
return (EINVAL);
pci_hi = pci ? cell[regno] : OFW_PADDR_NOT_PCI;
spc = pci_hi & OFW_PCI_PHYS_HI_SPACEMASK;
addr = 0;
for (c = 0; c < naddr; c++)
addr = ((uint64_t)addr << 32) | cell[regno++];
size = 0;
for (c = 0; c < nsize; c++)
size = ((uint64_t)size << 32) | cell[regno++];
/*
* Map the address range in the bridge's decoding window as given
* by the "ranges" property. If a node doesn't have such property
* or the property is empty, we assume an identity mapping. The
* standard says a missing property indicates no possible mapping.
* This code is more liberal since the intended use is to get a
* console running early, and a printf to warn of malformed data
* is probably futile before the console is fully set up.
*/
parent = OF_parent(bridge);
while (parent != 0) {
get_addr_props(parent, &nbridge, NULL, &pcib);
res = OF_getencprop(bridge, "ranges", cell, sizeof(cell));
if (res < 1)
goto next;
if (res % sizeof(cell[0]))
return (ENXIO);
/* Capture pci_hi if we just transitioned onto a PCI bus. */
if (pcib && pci_hi == OFW_PADDR_NOT_PCI) {
pci_hi = cell[0];
spc = pci_hi & OFW_PCI_PHYS_HI_SPACEMASK;
}
res /= sizeof(cell[0]);
regno = 0;
while (regno < res) {
rspc = (pci ? cell[regno] : OFW_PADDR_NOT_PCI) &
OFW_PCI_PHYS_HI_SPACEMASK;
if (rspc != spc) {
regno += naddr + nbridge + nsize;
continue;
}
raddr = 0;
for (c = 0; c < naddr; c++)
raddr = ((uint64_t)raddr << 32) | cell[regno++];
rspc = (pcib)
? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK
: OFW_PADDR_NOT_PCI;
baddr = 0;
for (c = 0; c < nbridge; c++)
baddr = ((uint64_t)baddr << 32) | cell[regno++];
rsize = 0;
for (c = 0; c < nsize; c++)
rsize = ((uint64_t)rsize << 32) | cell[regno++];
if (addr < raddr || addr >= raddr + rsize)
continue;
addr = addr - raddr + baddr;
if (rspc != OFW_PADDR_NOT_PCI)
spc = rspc;
}
next:
bridge = parent;
parent = OF_parent(bridge);
get_addr_props(bridge, &naddr, &nsize, &pci);
}
KASSERT(addr <= BUS_SPACE_MAXADDR,
("Bus address is too large: %jx", (uintmax_t)addr));
KASSERT(size <= BUS_SPACE_MAXSIZE,
("Bus size is too large: %jx", (uintmax_t)size));
*paddr = addr;
*psize = size;
if (ppci_hi != NULL)
*ppci_hi = pci_hi;
return (0);
}
/*
* This is intended to be called early on, right after the OF system is
* initialized, so pmap may not be up yet.
*/
int
ofw_parse_bootargs(void)
{
phandle_t chosen;
char buf[2048]; /* early stack supposedly big enough */
int err;
chosen = OF_finddevice("/chosen");
if (chosen == -1)
return (chosen);
if ((err = OF_getprop(chosen, "bootargs", buf, sizeof(buf))) != -1) {
boothowto |= boot_parse_cmdline(buf);
return (0);
}
return (err);
}
