/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2003 Matthew N. Dodd * 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include /* And all this for BIOS_PADDRTOVADDR() */ #include #include #include #include #include #include #define SMAPI_START 0xf0000 #define SMAPI_STEP 0x10 #define SMAPI_OFF 0 #define SMAPI_LEN 4 #define SMAPI_SIG "$SMB" #define RES2HDR(res) ((struct smapi_bios_header *)rman_get_virtual(res)) #define ADDR2HDR(addr) ((struct smapi_bios_header *)BIOS_PADDRTOVADDR(addr)) struct smapi_softc { struct cdev * cdev; device_t dev; struct resource * res; int rid; u_int32_t smapi32_entry; struct smapi_bios_header *header; }; extern u_long smapi32_offset; extern u_short smapi32_segment; static d_ioctl_t smapi_ioctl; static struct cdevsw smapi_cdevsw = { .d_version = D_VERSION, .d_ioctl = smapi_ioctl, .d_name = "smapi", .d_flags = D_NEEDGIANT, }; static void smapi_identify(driver_t *, device_t); static int smapi_probe(device_t); static int smapi_attach(device_t); static int smapi_detach(device_t); static int smapi_modevent(module_t, int, void *); static int smapi_header_cksum(struct smapi_bios_header *); extern int smapi32(struct smapi_bios_parameter *, struct smapi_bios_parameter *); extern int smapi32_new(u_long, u_short, struct smapi_bios_parameter *, struct smapi_bios_parameter *); static int smapi_ioctl (struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td) { struct smapi_softc *sc = dev->si_drv1; int error; switch (cmd) { case SMAPIOGHEADER: bcopy((caddr_t)sc->header, data, sizeof(struct smapi_bios_header)); error = 0; break; case SMAPIOCGFUNCTION: smapi32_offset = sc->smapi32_entry; error = smapi32((struct smapi_bios_parameter *)data, (struct smapi_bios_parameter *)data); break; default: error = ENOTTY; } return (error); } static int smapi_header_cksum (struct smapi_bios_header *header) { u_int8_t *ptr; u_int8_t cksum; int i; ptr = (u_int8_t *)header; cksum = 0; for (i = 0; i < header->length; i++) { cksum += ptr[i]; } return (cksum); } static void smapi_identify (driver_t *driver, device_t parent) { device_t child; u_int32_t addr; int length; int rid; if (!device_is_alive(parent)) return; addr = bios_sigsearch(SMAPI_START, SMAPI_SIG, SMAPI_LEN, SMAPI_STEP, SMAPI_OFF); if (addr != 0) { rid = 0; length = ADDR2HDR(addr)->length; child = BUS_ADD_CHILD(parent, 5, "smapi", -1); device_set_driver(child, driver); bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length); device_set_desc(child, "SMAPI BIOS"); } return; } static int smapi_probe (device_t dev) { struct resource *res; int rid; int error; error = 0; rid = 0; res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); if (res == NULL) { device_printf(dev, "Unable to allocate memory resource.\n"); error = ENOMEM; goto bad; } if (smapi_header_cksum(RES2HDR(res))) { device_printf(dev, "SMAPI header checksum failed.\n"); error = ENXIO; goto bad; } bad: if (res) bus_release_resource(dev, SYS_RES_MEMORY, rid, res); return (error); } static int smapi_attach (device_t dev) { struct make_dev_args args; struct smapi_softc *sc; int error; sc = device_get_softc(dev); error = 0; sc->dev = dev; sc->rid = 0; sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid, RF_ACTIVE); if (sc->res == NULL) { device_printf(dev, "Unable to allocate memory resource.\n"); error = ENOMEM; goto bad; } sc->header = (struct smapi_bios_header *)rman_get_virtual(sc->res); sc->smapi32_entry = (u_int32_t)BIOS_PADDRTOVADDR( sc->header->prot32_segment + sc->header->prot32_offset); make_dev_args_init(&args); args.mda_devsw = &smapi_cdevsw; args.mda_uid = UID_ROOT; args.mda_gid = GID_WHEEL; args.mda_mode = 0600; args.mda_si_drv1 = sc; error = make_dev_s(&args, &sc->cdev, "%s%d", smapi_cdevsw.d_name, device_get_unit(sc->dev)); if (error != 0) goto bad; device_printf(dev, "Version: %d.%02d, Length: %d, Checksum: 0x%02x\n", bcd2bin(sc->header->version_major), bcd2bin(sc->header->version_minor), sc->header->length, sc->header->checksum); device_printf(dev, "Information=0x%b\n", sc->header->information, "\020" "\001REAL_VM86" "\002PROTECTED_16" "\003PROTECTED_32"); if (bootverbose) { if (sc->header->information & SMAPI_REAL_VM86) device_printf(dev, "Real/VM86 mode: Segment 0x%04x, Offset 0x%04x\n", sc->header->real16_segment, sc->header->real16_offset); if (sc->header->information & SMAPI_PROT_16BIT) device_printf(dev, "16-bit Protected mode: Segment 0x%08x, Offset 0x%04x\n", sc->header->prot16_segment, sc->header->prot16_offset); if (sc->header->information & SMAPI_PROT_32BIT) device_printf(dev, "32-bit Protected mode: Segment 0x%08x, Offset 0x%08x\n", sc->header->prot32_segment, sc->header->prot32_offset); } return (0); bad: if (sc->res) bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); return (error); } static int smapi_detach (device_t dev) { struct smapi_softc *sc; sc = device_get_softc(dev); destroy_dev(sc->cdev); if (sc->res) bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res); return (0); } static device_method_t smapi_methods[] = { /* Device interface */ DEVMETHOD(device_identify, smapi_identify), DEVMETHOD(device_probe, smapi_probe), DEVMETHOD(device_attach, smapi_attach), DEVMETHOD(device_detach, smapi_detach), { 0, 0 } }; static driver_t smapi_driver = { "smapi", smapi_methods, sizeof(struct smapi_softc), }; static int smapi_modevent (module_t mod, int what, void *arg) { device_t * devs; int count; int i; switch (what) { case MOD_LOAD: break; case MOD_UNLOAD: devclass_get_devices(devclass_find(smapi_driver.name), &devs, &count); for (i = 0; i < count; i++) { device_delete_child(device_get_parent(devs[i]), devs[i]); } free(devs, M_TEMP); break; default: break; } return (0); } DRIVER_MODULE(smapi, nexus, smapi_driver, smapi_modevent, NULL); MODULE_VERSION(smapi, 1);