Date: Tue, 8 Jul 2014 08:18:45 +0000 (UTC) From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r268386 - in projects/arm64/sys: arm64/arm64 conf Message-ID: <201407080818.s688IjTO020710@svn.freebsd.org>
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Author: andrew Date: Tue Jul 8 08:18:44 2014 New Revision: 268386 URL: http://svnweb.freebsd.org/changeset/base/268386 Log: Add a basic nexus driver based on the ARM copy. Added: projects/arm64/sys/arm64/arm64/nexus.c (contents, props changed) Modified: projects/arm64/sys/conf/files.arm64 Added: projects/arm64/sys/arm64/arm64/nexus.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ projects/arm64/sys/arm64/arm64/nexus.c Tue Jul 8 08:18:44 2014 (r268386) @@ -0,0 +1,375 @@ +/*- + * Copyright 1998 Massachusetts Institute of Technology + * + * Permission to use, copy, modify, and distribute this software and + * its documentation for any purpose and without fee is hereby + * granted, provided that both the above copyright notice and this + * permission notice appear in all copies, that both the above + * copyright notice and this permission notice appear in all + * supporting documentation, and that the name of M.I.T. not be used + * in advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. M.I.T. makes + * no representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied + * warranty. + * + * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS + * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT + * SHALL M.I.T. 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. + * + */ + +/* + * This code implements a `root nexus' for Arm Architecture + * machines. The function of the root nexus is to serve as an + * attachment point for both processors and buses, and to manage + * resources which are common to all of them. In particular, + * this code implements the core resource managers for interrupt + * requests, DMA requests (which rightfully should be a part of the + * ISA code but it's easier to do it here for now), I/O port addresses, + * and I/O memory address space. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/module.h> +#include <machine/bus.h> +#include <sys/rman.h> +#include <sys/interrupt.h> + +#include <machine/vmparam.h> +#include <machine/pcb.h> +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <machine/resource.h> +//#include <machine/intr.h> + +#include "opt_platform.h" + +#ifdef FDT +#include <dev/fdt/fdt_common.h> +#include <machine/fdt.h> +#include "ofw_bus_if.h" +#endif + +static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); + +struct nexus_device { + struct resource_list nx_resources; +}; + +#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) + +static struct rman mem_rman; + +static int nexus_probe(device_t); +static int nexus_attach(device_t); +static int nexus_print_child(device_t, device_t); +static device_t nexus_add_child(device_t, u_int, const char *, int); +static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, + u_long, u_long, u_long, u_int); +static int nexus_activate_resource(device_t, device_t, int, int, + struct resource *); +static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, + enum intr_polarity pol); +static int nexus_deactivate_resource(device_t, device_t, int, int, + struct resource *); + +static int nexus_setup_intr(device_t dev, device_t child, struct resource *res, + int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep); +static int nexus_teardown_intr(device_t, device_t, struct resource *, void *); + +#ifdef FDT +static int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, + int icells, pcell_t *intr); +#endif + +static device_method_t nexus_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, nexus_probe), + DEVMETHOD(device_attach, nexus_attach), + /* Bus interface */ + DEVMETHOD(bus_print_child, nexus_print_child), + DEVMETHOD(bus_add_child, nexus_add_child), + DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), + DEVMETHOD(bus_activate_resource, nexus_activate_resource), + DEVMETHOD(bus_config_intr, nexus_config_intr), + DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), + DEVMETHOD(bus_setup_intr, nexus_setup_intr), + DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), +#ifdef FDT + DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), +#endif + { 0, 0 } +}; + +static devclass_t nexus_devclass; +static driver_t nexus_driver = { + "nexus", + nexus_methods, + 1 /* no softc */ +}; +DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); + +static int +nexus_probe(device_t dev) +{ + + device_quiet(dev); /* suppress attach message for neatness */ + + return (BUS_PROBE_DEFAULT); +} + +static int +nexus_attach(device_t dev) +{ + + mem_rman.rm_start = 0; + mem_rman.rm_end = ~0ul; + mem_rman.rm_type = RMAN_ARRAY; + mem_rman.rm_descr = "I/O memory addresses"; + if (rman_init(&mem_rman) || rman_manage_region(&mem_rman, 0, ~0)) + panic("nexus_probe mem_rman"); + + /* + * First, deal with the children we know about already + */ + bus_generic_probe(dev); + bus_generic_attach(dev); + + return (0); +} + +static int +nexus_print_child(device_t bus, device_t child) +{ + int retval = 0; + + retval += bus_print_child_header(bus, child); + retval += printf("\n"); + + return (retval); +} + +static device_t +nexus_add_child(device_t bus, u_int order, const char *name, int unit) +{ + device_t child; + struct nexus_device *ndev; + + ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); + if (!ndev) + return (0); + resource_list_init(&ndev->nx_resources); + + child = device_add_child_ordered(bus, order, name, unit); + + /* should we free this in nexus_child_detached? */ + device_set_ivars(child, ndev); + + return (child); +} + + +/* + * Allocate a resource on behalf of child. NB: child is usually going to be a + * child of one of our descendants, not a direct child of nexus0. + * (Exceptions include footbridge.) + */ +static struct resource * +nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, + u_long start, u_long end, u_long count, u_int flags) +{ + struct resource *rv; + struct rman *rm; + int needactivate = flags & RF_ACTIVE; + + switch (type) { + case SYS_RES_MEMORY: + case SYS_RES_IOPORT: + rm = &mem_rman; + break; + + default: + return (0); + } + + rv = rman_reserve_resource(rm, start, end, count, flags, child); + if (rv == 0) + return (0); + + rman_set_rid(rv, *rid); + rman_set_bushandle(rv, rman_get_start(rv)); + + if (needactivate) { + if (bus_activate_resource(child, type, *rid, rv)) { + rman_release_resource(rv); + return (0); + } + } + + return (rv); +} + +static int +nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, + enum intr_polarity pol) +{ +#if 0 + int ret = ENODEV; + + if (arm_config_irq) + ret = (*arm_config_irq)(irq, trig, pol); + + return (ret); +#endif + panic("nexus_config_intr"); +} + +static int +nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, + driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep) +{ +#if 0 + int irq; + + if ((rman_get_flags(res) & RF_SHAREABLE) == 0) + flags |= INTR_EXCL; + + for (irq = rman_get_start(res); irq <= rman_get_end(res); irq++) { + arm_setup_irqhandler(device_get_nameunit(child), + filt, intr, arg, irq, flags, cookiep); + arm_unmask_irq(irq); + } + return (0); +#endif + panic("nexus_setup_intr"); +} + +static int +nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) +{ + +#if 0 + return (arm_remove_irqhandler(rman_get_start(r), ih)); +#endif + panic("nexus_teardown_intr"); +} + + +static int +nexus_activate_resource(device_t bus, device_t child, int type, int rid, + struct resource *r) +{ + int err; + bus_addr_t paddr; + bus_size_t psize; + bus_space_handle_t vaddr; + + if ((err = rman_activate_resource(r)) != 0) + return (err); + + /* + * If this is a memory resource, map it into the kernel. + */ + if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { + paddr = (bus_addr_t)rman_get_start(r); + psize = (bus_size_t)rman_get_size(r); +#if 0 +#ifdef FDT + err = bus_space_map(fdtbus_bs_tag, paddr, psize, 0, &vaddr); + if (err != 0) { + rman_deactivate_resource(r); + return (err); + } + rman_set_bustag(r, fdtbus_bs_tag); +#else + vaddr = (bus_space_handle_t)pmap_mapdev((vm_offset_t)paddr, + (vm_size_t)psize); + if (vaddr == 0) { + rman_deactivate_resource(r); + return (ENOMEM); + } + rman_set_bustag(r, (void *)1); +#endif +#endif + panic("nexus_activate_resource"); + rman_set_virtual(r, (void *)vaddr); + rman_set_bushandle(r, vaddr); + } + return (0); +} + +static int +nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, + struct resource *r) +{ + bus_size_t psize; + bus_space_handle_t vaddr; + + psize = (bus_size_t)rman_get_size(r); + vaddr = rman_get_bushandle(r); + + if (vaddr != 0) { +#if 0 +#ifdef FDT + bus_space_unmap(fdtbus_bs_tag, vaddr, psize); +#else + pmap_unmapdev((vm_offset_t)vaddr, (vm_size_t)psize); +#endif +#endif + panic("nexus_deactivate_resource"); + rman_set_virtual(r, NULL); + rman_set_bushandle(r, 0); + } + + return (rman_deactivate_resource(r)); +} + +#ifdef FDT +static int +nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, + pcell_t *intr) +{ + fdt_pic_decode_t intr_decode; + phandle_t intr_offset; + int i, rv, interrupt, trig, pol; + + intr_offset = OF_xref_phandle(iparent); + for (i = 0; i < icells; i++) + intr[i] = cpu_to_fdt32(intr[i]); + + for (i = 0; fdt_pic_table[i] != NULL; i++) { + intr_decode = fdt_pic_table[i]; + rv = intr_decode(intr_offset, intr, &interrupt, &trig, &pol); + + if (rv == 0) { + /* This was recognized as our PIC and decoded. */ + interrupt = FDT_MAP_IRQ(intr_parent, interrupt); + return (interrupt); + } + } + + /* Not in table, so guess */ + interrupt = FDT_MAP_IRQ(intr_parent, fdt32_to_cpu(intr[0])); + + return (interrupt); +} +#endif + Modified: projects/arm64/sys/conf/files.arm64 ============================================================================== --- projects/arm64/sys/conf/files.arm64 Tue Jul 8 08:11:52 2014 (r268385) +++ projects/arm64/sys/conf/files.arm64 Tue Jul 8 08:18:44 2014 (r268386) @@ -13,6 +13,7 @@ arm64/arm64/in_cksum.c optional inet | arm64/arm64/locore.S standard no-obj arm64/arm64/machdep.c standard arm64/arm64/mem.c standard +arm64/arm64/nexus.c standard arm64/arm64/pmap.c standard arm64/arm64/stack_machdep.c standard arm64/arm64/support.c standard
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