File: [cvs.NetBSD.org] / src / sys / arch / arm / fdt / cpu_fdt.c (download)
Revision 1.4.2.1, Sat Apr 7 04:12:11 2018 UTC (6 years ago) by pgoyette
Branch: pgoyette-compat
Changes since 1.4: +10 -6
lines
Sync with HEAD. 77 conflicts resolved - all of them $NetBSD$
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/* $NetBSD: cpu_fdt.c,v 1.4.2.1 2018/04/07 04:12:11 pgoyette Exp $ */
/*-
* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
* 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 ``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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cpu_fdt.c,v 1.4.2.1 2018/04/07 04:12:11 pgoyette Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/lwp.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <dev/fdt/fdtvar.h>
#include <arm/armreg.h>
#include <arm/cpu.h>
#include <arm/cpufunc.h>
static int cpu_fdt_match(device_t, cfdata_t, void *);
static void cpu_fdt_attach(device_t, device_t, void *);
enum cpu_fdt_type {
ARM_CPU_UP = 1,
ARM_CPU_ARMV7,
ARM_CPU_ARMV8,
};
struct cpu_fdt_softc {
device_t sc_dev;
int sc_phandle;
};
static const struct of_compat_data compat_data[] = {
{ "arm,arm1176jzf-s", ARM_CPU_UP },
{ "arm,cortex-a5", ARM_CPU_ARMV7 },
{ "arm,cortex-a7", ARM_CPU_ARMV7 },
{ "arm,cortex-a8", ARM_CPU_ARMV7 },
{ "arm,cortex-a9", ARM_CPU_ARMV7 },
{ "arm,cortex-a12", ARM_CPU_ARMV7 },
{ "arm,cortex-a15", ARM_CPU_ARMV7 },
{ "arm,cortex-a17", ARM_CPU_ARMV7 },
{ "arm,cortex-a53", ARM_CPU_ARMV8 },
{ "arm,cortex-a57", ARM_CPU_ARMV8 },
{ "arm,cortex-a72", ARM_CPU_ARMV8 },
{ "arm,cortex-a73", ARM_CPU_ARMV8 },
{ NULL }
};
CFATTACH_DECL_NEW(cpu_fdt, sizeof(struct cpu_fdt_softc),
cpu_fdt_match, cpu_fdt_attach, NULL, NULL);
static int
cpu_fdt_match(device_t parent, cfdata_t cf, void *aux)
{
struct fdt_attach_args * const faa = aux;
const int phandle = faa->faa_phandle;
enum cpu_fdt_type type;
int is_compatible;
bus_addr_t mpidr;
is_compatible = of_match_compat_data(phandle, compat_data);
if (!is_compatible)
return 0;
type = of_search_compatible(phandle, compat_data)->data;
switch (type) {
case ARM_CPU_ARMV7:
case ARM_CPU_ARMV8:
/* XXX NetBSD requires all CPUs to be in the same cluster */
if (fdtbus_get_reg(phandle, 0, &mpidr, NULL) != 0)
return 0;
const u_int bp_clid = cpu_clusterid();
const u_int clid = __SHIFTOUT(mpidr, MPIDR_AFF1);
if (bp_clid != clid)
return 0;
break;
default:
break;
}
return is_compatible;
}
static void
cpu_fdt_attach(device_t parent, device_t self, void *aux)
{
struct cpu_fdt_softc * const sc = device_private(self);
struct fdt_attach_args * const faa = aux;
const int phandle = faa->faa_phandle;
enum cpu_fdt_type type;
bus_addr_t mpidr;
cpuid_t cpuid;
sc->sc_dev = self;
sc->sc_phandle = phandle;
type = of_search_compatible(phandle, compat_data)->data;
switch (type) {
case ARM_CPU_ARMV7:
case ARM_CPU_ARMV8:
if (fdtbus_get_reg(phandle, 0, &mpidr, NULL) != 0) {
aprint_error(": missing 'reg' property\n");
return;
}
cpuid = __SHIFTOUT(mpidr, MPIDR_AFF0);
break;
default:
cpuid = 0;
break;
}
/* Attach the CPU */
cpu_attach(self, cpuid);
}