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/* $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai Exp $ */ /*- * Copyright (C) 1995, 1996 Wolfgang Solfrank. * Copyright (C) 1995, 1996 TooLs GmbH. * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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. */ /*- * Copyright (C) 2000 Benno Rice. * 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 Benno Rice ``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: release/9.1.0/sys/powerpc/ofw/ofw_real.c 222613 2011-06-02 14:12:37Z nwhitehorn $"); #include <sys/param.h> #include <sys/kernel.h> #include <sys/lock.h> #include <sys/mutex.h> #include <sys/systm.h> #include <vm/vm.h> #include <vm/vm_page.h> #include <vm/pmap.h> #include <machine/bus.h> #include <machine/md_var.h> #include <machine/ofw_machdep.h> #include <machine/pmap.h> #include <machine/stdarg.h> #include <dev/ofw/openfirm.h> #include <dev/ofw/ofwvar.h> #include "ofw_if.h" static int ofw_real_init(ofw_t, void *openfirm); static int ofw_real_test(ofw_t, const char *name); static phandle_t ofw_real_peer(ofw_t, phandle_t node); static phandle_t ofw_real_child(ofw_t, phandle_t node); static phandle_t ofw_real_parent(ofw_t, phandle_t node); static phandle_t ofw_real_instance_to_package(ofw_t, ihandle_t instance); static ssize_t ofw_real_getproplen(ofw_t, phandle_t package, const char *propname); static ssize_t ofw_real_getprop(ofw_t, phandle_t package, const char *propname, void *buf, size_t buflen); static int ofw_real_nextprop(ofw_t, phandle_t package, const char *previous, char *buf, size_t); static int ofw_real_setprop(ofw_t, phandle_t package, const char *propname, const void *buf, size_t len); static ssize_t ofw_real_canon(ofw_t, const char *device, char *buf, size_t len); static phandle_t ofw_real_finddevice(ofw_t, const char *device); static ssize_t ofw_real_instance_to_path(ofw_t, ihandle_t instance, char *buf, size_t len); static ssize_t ofw_real_package_to_path(ofw_t, phandle_t package, char *buf, size_t len); static int ofw_real_call_method(ofw_t, ihandle_t instance, const char *method, int nargs, int nreturns, cell_t *args_and_returns); static int ofw_real_interpret(ofw_t ofw, const char *cmd, int nreturns, cell_t *returns); static ihandle_t ofw_real_open(ofw_t, const char *device); static void ofw_real_close(ofw_t, ihandle_t instance); static ssize_t ofw_real_read(ofw_t, ihandle_t instance, void *addr, size_t len); static ssize_t ofw_real_write(ofw_t, ihandle_t instance, const void *addr, size_t len); static int ofw_real_seek(ofw_t, ihandle_t instance, u_int64_t pos); static caddr_t ofw_real_claim(ofw_t, void *virt, size_t size, u_int align); static void ofw_real_release(ofw_t, void *virt, size_t size); static void ofw_real_enter(ofw_t); static void ofw_real_exit(ofw_t); static ofw_method_t ofw_real_methods[] = { OFWMETHOD(ofw_init, ofw_real_init), OFWMETHOD(ofw_peer, ofw_real_peer), OFWMETHOD(ofw_child, ofw_real_child), OFWMETHOD(ofw_parent, ofw_real_parent), OFWMETHOD(ofw_instance_to_package, ofw_real_instance_to_package), OFWMETHOD(ofw_getproplen, ofw_real_getproplen), OFWMETHOD(ofw_getprop, ofw_real_getprop), OFWMETHOD(ofw_nextprop, ofw_real_nextprop), OFWMETHOD(ofw_setprop, ofw_real_setprop), OFWMETHOD(ofw_canon, ofw_real_canon), OFWMETHOD(ofw_finddevice, ofw_real_finddevice), OFWMETHOD(ofw_instance_to_path, ofw_real_instance_to_path), OFWMETHOD(ofw_package_to_path, ofw_real_package_to_path), OFWMETHOD(ofw_test, ofw_real_test), OFWMETHOD(ofw_call_method, ofw_real_call_method), OFWMETHOD(ofw_interpret, ofw_real_interpret), OFWMETHOD(ofw_open, ofw_real_open), OFWMETHOD(ofw_close, ofw_real_close), OFWMETHOD(ofw_read, ofw_real_read), OFWMETHOD(ofw_write, ofw_real_write), OFWMETHOD(ofw_seek, ofw_real_seek), OFWMETHOD(ofw_claim, ofw_real_claim), OFWMETHOD(ofw_release, ofw_real_release), OFWMETHOD(ofw_enter, ofw_real_enter), OFWMETHOD(ofw_exit, ofw_real_exit), { 0, 0 } }; static ofw_def_t ofw_real = { OFW_STD_REAL, ofw_real_methods, 0 }; OFW_DEF(ofw_real); static ofw_def_t ofw_32bit = { OFW_STD_32BIT, ofw_real_methods, 0 }; OFW_DEF(ofw_32bit); MALLOC_DEFINE(M_OFWREAL, "ofwreal", "Open Firmware Real Mode Bounce Page"); static int (*openfirmware)(void *); static vm_offset_t of_bounce_phys; static caddr_t of_bounce_virt; static off_t of_bounce_offset; static size_t of_bounce_size; static struct mtx of_bounce_mtx; extern int ofw_real_mode; extern struct pmap ofw_pmap; /* * After the VM is up, allocate a wired, low memory bounce page. */ static void ofw_real_bounce_alloc(void *); SYSINIT(ofw_real_bounce_alloc, SI_SUB_KMEM, SI_ORDER_ANY, ofw_real_bounce_alloc, NULL); static void ofw_real_start(void) { mtx_lock(&of_bounce_mtx); of_bounce_offset = 0; } static void ofw_real_stop(void) { mtx_unlock(&of_bounce_mtx); } static void ofw_real_bounce_alloc(void *junk) { /* * Check that ofw_real is actually in use before allocating wads * of memory. Do this by checking if our mutex has been set up. */ if (!mtx_initialized(&of_bounce_mtx)) return; /* * Allocate a page of contiguous, wired physical memory that can * fit into a 32-bit address space and accessed from real mode. */ mtx_lock(&of_bounce_mtx); of_bounce_virt = contigmalloc(PAGE_SIZE, M_OFWREAL, 0, 0, ulmin(platform_real_maxaddr(), BUS_SPACE_MAXADDR_32BIT), PAGE_SIZE, PAGE_SIZE); of_bounce_phys = vtophys(of_bounce_virt); of_bounce_size = PAGE_SIZE; /* * For virtual-mode OF, direct map this physical address so that * we have a 32-bit virtual address to give OF. */ if (!ofw_real_mode && !hw_direct_map) pmap_kenter(of_bounce_phys, of_bounce_phys); mtx_unlock(&of_bounce_mtx); } static cell_t ofw_real_map(const void *buf, size_t len) { static char emergency_buffer[255]; cell_t phys; mtx_assert(&of_bounce_mtx, MA_OWNED); if (of_bounce_virt == NULL) { /* * If we haven't set up the MMU, then buf is guaranteed * to be accessible to OF, because the only memory we * can use right now is memory mapped by firmware. */ if (!pmap_bootstrapped) return (cell_t)(uintptr_t)buf; /* * XXX: It is possible for us to get called before the VM has * come online, but after the MMU is up. We don't have the * bounce buffer yet, but can no longer presume a 1:1 mapping. * Copy into the emergency buffer, and reset at the end. */ of_bounce_virt = emergency_buffer; of_bounce_phys = (vm_offset_t)of_bounce_virt; of_bounce_size = sizeof(emergency_buffer); } /* * Make sure the bounce page offset satisfies any reasonable * alignment constraint. */ of_bounce_offset += sizeof(register_t) - (of_bounce_offset % sizeof(register_t)); if (of_bounce_offset + len > of_bounce_size) { panic("Oversize Open Firmware call!"); return 0; } if (buf != NULL) memcpy(of_bounce_virt + of_bounce_offset, buf, len); else return (0); phys = of_bounce_phys + of_bounce_offset; of_bounce_offset += len; return (phys); } static void ofw_real_unmap(cell_t physaddr, void *buf, size_t len) { mtx_assert(&of_bounce_mtx, MA_OWNED); if (of_bounce_virt == NULL) return; if (physaddr == 0) return; memcpy(buf,of_bounce_virt + (physaddr - of_bounce_phys),len); } /* Initialiser */ static int ofw_real_init(ofw_t ofw, void *openfirm) { openfirmware = (int (*)(void *))openfirm; mtx_init(&of_bounce_mtx, "OF Bounce Page", MTX_DEF, 0); of_bounce_virt = NULL; return (0); } /* * Generic functions */ /* Test to see if a service exists. */ static int ofw_real_test(ofw_t ofw, const char *name) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t service; cell_t missing; } args; args.name = (cell_t)(uintptr_t)"test"; args.nargs = 1; args.nreturns = 1; ofw_real_start(); args.service = ofw_real_map(name, strlen(name) + 1); argsptr = ofw_real_map(&args, sizeof(args)); if (args.service == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.missing); } /* * Device tree functions */ /* Return the next sibling of this node or 0. */ static phandle_t ofw_real_peer(ofw_t ofw, phandle_t node) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t node; cell_t next; } args; args.name = (cell_t)(uintptr_t)"peer"; args.nargs = 1; args.nreturns = 1; args.node = node; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); if (openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.next); } /* Return the first child of this node or 0. */ static phandle_t ofw_real_child(ofw_t ofw, phandle_t node) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t node; cell_t child; } args; args.name = (cell_t)(uintptr_t)"child"; args.nargs = 1; args.nreturns = 1; args.node = node; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); if (openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.child); } /* Return the parent of this node or 0. */ static phandle_t ofw_real_parent(ofw_t ofw, phandle_t node) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t node; cell_t parent; } args; args.name = (cell_t)(uintptr_t)"parent"; args.nargs = 1; args.nreturns = 1; args.node = node; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); if (openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.parent); } /* Return the package handle that corresponds to an instance handle. */ static phandle_t ofw_real_instance_to_package(ofw_t ofw, ihandle_t instance) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t instance; cell_t package; } args; args.name = (cell_t)(uintptr_t)"instance-to-package"; args.nargs = 1; args.nreturns = 1; args.instance = instance; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); if (openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.package); } /* Get the length of a property of a package. */ static ssize_t ofw_real_getproplen(ofw_t ofw, phandle_t package, const char *propname) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t package; cell_t propname; int32_t proplen; } args; args.name = (cell_t)(uintptr_t)"getproplen"; args.nargs = 2; args.nreturns = 1; ofw_real_start(); args.package = package; args.propname = ofw_real_map(propname, strlen(propname) + 1); argsptr = ofw_real_map(&args, sizeof(args)); if (args.propname == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.proplen); } /* Get the value of a property of a package. */ static ssize_t ofw_real_getprop(ofw_t ofw, phandle_t package, const char *propname, void *buf, size_t buflen) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t package; cell_t propname; cell_t buf; cell_t buflen; int32_t size; } args; args.name = (cell_t)(uintptr_t)"getprop"; args.nargs = 4; args.nreturns = 1; ofw_real_start(); args.package = package; args.propname = ofw_real_map(propname, strlen(propname) + 1); args.buf = ofw_real_map(buf, buflen); args.buflen = buflen; argsptr = ofw_real_map(&args, sizeof(args)); if (args.propname == 0 || args.buf == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_unmap(args.buf, buf, buflen); ofw_real_stop(); return (args.size); } /* Get the next property of a package. */ static int ofw_real_nextprop(ofw_t ofw, phandle_t package, const char *previous, char *buf, size_t size) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t package; cell_t previous; cell_t buf; cell_t flag; } args; args.name = (cell_t)(uintptr_t)"nextprop"; args.nargs = 3; args.nreturns = 1; ofw_real_start(); args.package = package; args.previous = ofw_real_map(previous, (previous != NULL) ? (strlen(previous) + 1) : 0); args.buf = ofw_real_map(buf, size); argsptr = ofw_real_map(&args, sizeof(args)); if (args.buf == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_unmap(args.buf, buf, size); ofw_real_stop(); return (args.flag); } /* Set the value of a property of a package. */ /* XXX Has a bug on FirePower */ static int ofw_real_setprop(ofw_t ofw, phandle_t package, const char *propname, const void *buf, size_t len) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t package; cell_t propname; cell_t buf; cell_t len; cell_t size; } args; args.name = (cell_t)(uintptr_t)"setprop"; args.nargs = 4; args.nreturns = 1; ofw_real_start(); args.package = package; args.propname = ofw_real_map(propname, strlen(propname) + 1); args.buf = ofw_real_map(buf, len); args.len = len; argsptr = ofw_real_map(&args, sizeof(args)); if (args.propname == 0 || args.buf == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.size); } /* Convert a device specifier to a fully qualified pathname. */ static ssize_t ofw_real_canon(ofw_t ofw, const char *device, char *buf, size_t len) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t device; cell_t buf; cell_t len; int32_t size; } args; args.name = (cell_t)(uintptr_t)"canon"; args.nargs = 3; args.nreturns = 1; ofw_real_start(); args.device = ofw_real_map(device, strlen(device) + 1); args.buf = ofw_real_map(buf, len); args.len = len; argsptr = ofw_real_map(&args, sizeof(args)); if (args.device == 0 || args.buf == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_unmap(args.buf, buf, len); ofw_real_stop(); return (args.size); } /* Return a package handle for the specified device. */ static phandle_t ofw_real_finddevice(ofw_t ofw, const char *device) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t device; cell_t package; } args; args.name = (cell_t)(uintptr_t)"finddevice"; args.nargs = 1; args.nreturns = 1; ofw_real_start(); args.device = ofw_real_map(device, strlen(device) + 1); argsptr = ofw_real_map(&args, sizeof(args)); if (args.device == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.package); } /* Return the fully qualified pathname corresponding to an instance. */ static ssize_t ofw_real_instance_to_path(ofw_t ofw, ihandle_t instance, char *buf, size_t len) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t instance; cell_t buf; cell_t len; int32_t size; } args; args.name = (cell_t)(uintptr_t)"instance-to-path"; args.nargs = 3; args.nreturns = 1; ofw_real_start(); args.instance = instance; args.buf = ofw_real_map(buf, len); args.len = len; argsptr = ofw_real_map(&args, sizeof(args)); if (args.buf == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_unmap(args.buf, buf, len); ofw_real_stop(); return (args.size); } /* Return the fully qualified pathname corresponding to a package. */ static ssize_t ofw_real_package_to_path(ofw_t ofw, phandle_t package, char *buf, size_t len) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t package; cell_t buf; cell_t len; int32_t size; } args; args.name = (cell_t)(uintptr_t)"package-to-path"; args.nargs = 3; args.nreturns = 1; ofw_real_start(); args.package = package; args.buf = ofw_real_map(buf, len); args.len = len; argsptr = ofw_real_map(&args, sizeof(args)); if (args.buf == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_unmap(args.buf, buf, len); ofw_real_stop(); return (args.size); } /* Call the method in the scope of a given instance. */ static int ofw_real_call_method(ofw_t ofw, ihandle_t instance, const char *method, int nargs, int nreturns, cell_t *args_and_returns) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t method; cell_t instance; cell_t args_n_results[12]; } args; cell_t *ap, *cp; int n; args.name = (cell_t)(uintptr_t)"call-method"; args.nargs = 2; args.nreturns = 1; if (nargs > 6) return (-1); ofw_real_start(); args.nargs = nargs + 2; args.nreturns = nreturns + 1; args.method = ofw_real_map(method, strlen(method) + 1); args.instance = instance; ap = args_and_returns; for (cp = args.args_n_results + (n = nargs); --n >= 0;) *--cp = *(ap++); argsptr = ofw_real_map(&args, sizeof(args)); if (args.method == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); if (args.args_n_results[nargs]) return (args.args_n_results[nargs]); for (cp = args.args_n_results + nargs + (n = args.nreturns); --n > 0;) *(ap++) = *--cp; return (0); } static int ofw_real_interpret(ofw_t ofw, const char *cmd, int nreturns, cell_t *returns) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t slot[16]; } args; cell_t status; int i = 0, j = 0; args.name = (cell_t)(uintptr_t)"interpret"; args.nargs = 1; ofw_real_start(); args.nreturns = ++nreturns; args.slot[i++] = ofw_real_map(cmd, strlen(cmd) + 1); argsptr = ofw_real_map(&args, sizeof(args)); if (openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); status = args.slot[i++]; while (i < 1 + nreturns) returns[j++] = args.slot[i++]; return (status); } /* * Device I/O functions */ /* Open an instance for a device. */ static ihandle_t ofw_real_open(ofw_t ofw, const char *device) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t device; cell_t instance; } args; args.name = (cell_t)(uintptr_t)"open"; args.nargs = 1; args.nreturns = 1; ofw_real_start(); args.device = ofw_real_map(device, strlen(device) + 1); argsptr = ofw_real_map(&args, sizeof(args)); if (args.device == 0 || openfirmware((void *)argsptr) == -1 || args.instance == 0) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.instance); } /* Close an instance. */ static void ofw_real_close(ofw_t ofw, ihandle_t instance) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t instance; } args; args.name = (cell_t)(uintptr_t)"close"; args.nargs = 1; args.nreturns = 0; args.instance = instance; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); openfirmware((void *)argsptr); ofw_real_stop(); } /* Read from an instance. */ static ssize_t ofw_real_read(ofw_t ofw, ihandle_t instance, void *addr, size_t len) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t instance; cell_t addr; cell_t len; int32_t actual; } args; args.name = (cell_t)(uintptr_t)"read"; args.nargs = 3; args.nreturns = 1; ofw_real_start(); args.instance = instance; args.addr = ofw_real_map(addr, len); args.len = len; argsptr = ofw_real_map(&args, sizeof(args)); if (args.addr == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_unmap(args.addr, addr, len); ofw_real_stop(); return (args.actual); } /* Write to an instance. */ static ssize_t ofw_real_write(ofw_t ofw, ihandle_t instance, const void *addr, size_t len) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t instance; cell_t addr; cell_t len; int32_t actual; } args; args.name = (cell_t)(uintptr_t)"write"; args.nargs = 3; args.nreturns = 1; ofw_real_start(); args.instance = instance; args.addr = ofw_real_map(addr, len); args.len = len; argsptr = ofw_real_map(&args, sizeof(args)); if (args.addr == 0 || openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.actual); } /* Seek to a position. */ static int ofw_real_seek(ofw_t ofw, ihandle_t instance, u_int64_t pos) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t instance; cell_t poshi; cell_t poslo; cell_t status; } args; args.name = (cell_t)(uintptr_t)"seek"; args.nargs = 3; args.nreturns = 1; args.instance = instance; args.poshi = pos >> 32; args.poslo = pos; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); if (openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return (-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return (args.status); } /* * Memory functions */ /* Claim an area of memory. */ static caddr_t ofw_real_claim(ofw_t ofw, void *virt, size_t size, u_int align) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t virt; cell_t size; cell_t align; cell_t baseaddr; } args; args.name = (cell_t)(uintptr_t)"claim"; args.nargs = 3; args.nreturns = 1; args.virt = (cell_t)(uintptr_t)virt; args.size = size; args.align = align; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); if (openfirmware((void *)argsptr) == -1) { ofw_real_stop(); return ((void *)-1); } ofw_real_unmap(argsptr, &args, sizeof(args)); ofw_real_stop(); return ((void *)(uintptr_t)args.baseaddr); } /* Release an area of memory. */ static void ofw_real_release(ofw_t ofw, void *virt, size_t size) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; cell_t virt; cell_t size; } args; args.name = (cell_t)(uintptr_t)"release"; args.nargs = 2; args.nreturns = 0; args.virt = (cell_t)(uintptr_t)virt; args.size = size; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); openfirmware((void *)argsptr); ofw_real_stop(); } /* * Control transfer functions */ /* Suspend and drop back to the Open Firmware interface. */ static void ofw_real_enter(ofw_t ofw) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; } args; args.name = (cell_t)(uintptr_t)"enter"; args.nargs = 0; args.nreturns = 0; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); openfirmware((void *)argsptr); /* We may come back. */ ofw_real_stop(); } /* Shut down and drop back to the Open Firmware interface. */ static void ofw_real_exit(ofw_t ofw) { vm_offset_t argsptr; struct { cell_t name; cell_t nargs; cell_t nreturns; } args; args.name = (cell_t)(uintptr_t)"exit"; args.nargs = 0; args.nreturns = 0; ofw_real_start(); argsptr = ofw_real_map(&args, sizeof(args)); openfirmware((void *)argsptr); for (;;) /* just in case */ ; ofw_real_stop(); }