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sys/powerpc/ofw/ofw_initrd.c
- This file was added.
| /*- | |||||
| * Copyright (C) 2018 Breno Leitao | |||||
| * | |||||
| * 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 TOOLS GMBH 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> | |||||
| __FBSDID("$FreeBSD$"); | |||||
| #include <sys/param.h> | |||||
| #include <sys/kernel.h> | |||||
| #include <sys/systm.h> | |||||
| #include <sys/module.h> | |||||
| #include <sys/types.h> | |||||
| #include <sys/proc.h> | |||||
| #include <vm/vm.h> | |||||
| #include <vm/pmap.h> | |||||
| #include <machine/bus.h> | |||||
| #include <dev/ofw/openfirm.h> | |||||
| #include <dev/ofw/ofw_bus.h> | |||||
| #include <dev/ofw/ofw_bus_subr.h> | |||||
| #include "opt_md.h" | |||||
| #ifdef MD_ROOT_MEM | |||||
| extern u_char *mfs_root; | |||||
| extern uint32_t mfs_root_size; | |||||
| #else | |||||
| #warning "MD_ROOT_MEM should be set to use ofw initrd as a md device" | |||||
| #endif | |||||
| /* bus entry points */ | |||||
| static int ofw_initrd_probe(device_t dev); | |||||
| static int ofw_initrd_attach(device_t dev); | |||||
| static void ofw_initrd_identify(driver_t *driver, device_t parent); | |||||
| struct ofw_initrd_softc { | |||||
| device_t sc_dev; | |||||
| vm_paddr_t start; | |||||
| vm_paddr_t end; | |||||
| }; | |||||
| static int | |||||
| ofw_initrd_probe(device_t dev) | |||||
| { | |||||
| phandle_t chosen; | |||||
| pcell_t cell[2]; | |||||
| /* limit this device to one unit */ | |||||
| if (device_get_unit(dev) != 0) | |||||
| return (ENXIO); | |||||
| chosen = OF_finddevice("/chosen"); | |||||
| if (chosen <= 0) { | |||||
| return (ENXIO); | |||||
| } | |||||
| if (OF_getencprop(chosen, "linux,initrd-start", cell, | |||||
| sizeof(cell)) <= 0 || | |||||
jhibbits: This should be a ||, since both are needed. | |||||
| OF_getencprop(chosen, "linux,initrd-end", cell, | |||||
| sizeof(cell)) <= 0) { | |||||
| return (ENXIO); | |||||
| } | |||||
Not Done Inline ActionsOne nit: add parentheses around the return value. Then good to go. jhibbits: One nit: add parentheses around the return value. Then good to go. | |||||
| device_set_desc(dev, "OFW initrd memregion loader"); | |||||
| return BUS_PROBE_DEFAULT; | |||||
| } | |||||
| static int | |||||
| ofw_initrd_attach(device_t dev) | |||||
| { | |||||
| struct ofw_initrd_softc *sc; | |||||
| vm_paddr_t start, end; | |||||
| phandle_t chosen; | |||||
| pcell_t cell[2]; | |||||
| ssize_t size; | |||||
| sc = device_get_softc(dev); | |||||
| chosen = OF_finddevice("/chosen"); | |||||
| if (chosen <= 0) { | |||||
| device_printf(dev, "/chosen not found\n"); | |||||
| return (ENXIO); | |||||
| } | |||||
| size = OF_getencprop(chosen, "linux,initrd-start", cell, sizeof(cell)); | |||||
| if (size == 4) | |||||
| start = cell[0]; | |||||
| else if (size == 8) | |||||
| start = (uint64_t)cell[0] << 32 | cell[1]; | |||||
| else { | |||||
| device_printf(dev, "Wrong linux,initrd-start size\n"); | |||||
| return (ENXIO); | |||||
| } | |||||
| size = OF_getencprop(chosen, "linux,initrd-end", cell, sizeof(cell)); | |||||
| if (size == 4) | |||||
| end = cell[0]; | |||||
| else if (size == 8) | |||||
| end = (uint64_t)cell[0] << 32 | cell[1]; | |||||
| else{ | |||||
| device_printf(dev, "Wrong linux,initrd-end size\n"); | |||||
| return (ENXIO); | |||||
| } | |||||
| if (end - start > 0) { | |||||
| mfs_root = (u_char *) PHYS_TO_DMAP(start); | |||||
| mfs_root_size = end - start; | |||||
| return (0); | |||||
| } | |||||
| return (ENXIO); | |||||
| } | |||||
| static void | |||||
Not Done Inline ActionsSince only one initrd should be here, you can limit it here with: if (device_find_child(parent, "initrd", -1) != NULL) return; jhibbits: Since only one initrd should be here, you can limit it here with:
if (device_find_child… | |||||
| ofw_initrd_identify(driver_t *driver, device_t parent) | |||||
| { | |||||
| if (BUS_ADD_CHILD(parent, 10, "initrd", -1) == NULL) | |||||
| device_printf(parent, "add ofw_initrd child failed\n"); | |||||
| } | |||||
| static device_method_t ofw_initrd_methods[] = { | |||||
| DEVMETHOD(device_identify, ofw_initrd_identify), | |||||
| DEVMETHOD(device_probe, ofw_initrd_probe), | |||||
| DEVMETHOD(device_attach, ofw_initrd_attach), | |||||
| DEVMETHOD_END | |||||
| }; | |||||
| static driver_t ofw_initrd_driver = { | |||||
| "ofw_initrd", | |||||
| ofw_initrd_methods, | |||||
| sizeof(struct ofw_initrd_softc) | |||||
| }; | |||||
| static devclass_t ofw_initrd_devclass; | |||||
| DRIVER_MODULE(ofw_initrd, ofwbus, ofw_initrd_driver, ofw_initrd_devclass, | |||||
| NULL, NULL); | |||||
This should be a ||, since both are needed.