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- /* $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai Exp $ */
- /*-
- * SPDX-License-Identifier:BSD-4-Clause AND BSD-2-Clause-FreeBSD
- *
- * 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("$FreeBSD$");
- #include <sys/endian.h>
- #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/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);
- static 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;
- #define IN(x) htobe32(x)
- #define OUT(x) be32toh(x)
- /*
- * To be able to use OFW console on PPC, that requires real mode OFW,
- * the mutex that guards the mapping/unmapping of virtual to physical
- * buffers (of_real_mtx) must be of SPIN type. This is needed because
- * kernel console first locks a SPIN mutex before calling OFW real.
- * By default, of_real_mtx is a sleepable mutex. To make it of SPIN
- * type, use the following tunnable:
- * machdep.ofw.mtx_spin=1
- *
- * Besides that, a few more tunables are needed to select and use the
- * OFW console with real mode OFW.
- *
- * In order to disable the use of OFW FrameBuffer and fallback to the
- * OFW console, use:
- * hw.ofwfb.disable=1
- *
- * To disable the use of FDT (that doesn't support OFW read/write methods)
- * and use real OFW instead, unset the following loader variable:
- * unset usefdt
- *
- * OFW is put in quiesce state in early kernel boot, which usually disables
- * OFW read/write capabilities (in QEMU write continue to work, but
- * read doesn't). To avoid OFW quiesce, use:
- * debug.quiesce_ofw=0
- *
- * Note that disabling OFW quiesce can cause conflicts between kernel and
- * OFW trying to control the same hardware. Thus, it must be used with care.
- * Some conflicts can be avoided by disabling kernel drivers with hints.
- * For instance, to disable a xhci controller and an USB keyboard connected
- * to it, that may be already being used for input by OFW, use:
- * hint.xhci.0.disabled=1
- */
- static struct mtx of_bounce_mtx;
- static struct mtx of_spin_mtx;
- static struct mtx *of_real_mtx;
- static void (*of_mtx_lock)(void);
- static void (*of_mtx_unlock)(void);
- extern int ofw_real_mode;
- /*
- * 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_mtx_lock_spin(void)
- {
- mtx_lock_spin(of_real_mtx);
- }
- static void
- ofw_real_mtx_lock(void)
- {
- mtx_lock(of_real_mtx);
- }
- static void
- ofw_real_mtx_unlock_spin(void)
- {
- mtx_unlock_spin(of_real_mtx);
- }
- static void
- ofw_real_mtx_unlock(void)
- {
- mtx_unlock(of_real_mtx);
- }
- static void
- ofw_real_start(void)
- {
- (*of_mtx_lock)();
- of_bounce_offset = 0;
- }
- static void
- ofw_real_stop(void)
- {
- (*of_mtx_unlock)();
- }
- static void
- ofw_real_bounce_alloc(void *junk)
- {
- caddr_t temp;
- /*
- * 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.
- */
- temp = contigmalloc(4 * PAGE_SIZE, M_OFWREAL, 0, 0,
- ulmin(platform_real_maxaddr(), BUS_SPACE_MAXADDR_32BIT), PAGE_SIZE,
- 4 * PAGE_SIZE);
- if (temp == NULL)
- panic("%s: Not able to allocated contiguous memory\n", __func__);
- mtx_lock(&of_bounce_mtx);
- of_bounce_virt = temp;
- of_bounce_phys = vtophys(of_bounce_virt);
- of_bounce_size = 4 * 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 || DMAP_BASE_ADDRESS != 0))
- 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_real_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 & ~DMAP_BASE_ADDRESS);
- /*
- * 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 &
- ~DMAP_BASE_ADDRESS;
- 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_real_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)
- {
- int mtx_spin;
- openfirmware = (int (*)(void *))openfirm;
- mtx_init(&of_bounce_mtx, "OF Bounce Page", NULL, MTX_DEF);
- mtx_spin = 0;
- TUNABLE_INT_FETCH("machdep.ofw.mtx_spin", &mtx_spin);
- if (mtx_spin) {
- mtx_init(&of_spin_mtx, "OF Real", NULL, MTX_SPIN);
- of_real_mtx = &of_spin_mtx;
- of_mtx_lock = ofw_real_mtx_lock_spin;
- of_mtx_unlock = ofw_real_mtx_unlock_spin;
- } else {
- of_real_mtx = &of_bounce_mtx;
- of_mtx_lock = ofw_real_mtx_lock;
- of_mtx_unlock = ofw_real_mtx_unlock;
- }
- 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 = IN((cell_t)(uintptr_t)"test");
- args.nargs = IN(1);
- args.nreturns = IN(1);
- ofw_real_start();
- args.service = IN(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 (OUT(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 = IN((cell_t)(uintptr_t)"peer");
- args.nargs = IN(1);
- args.nreturns = IN(1);
- args.node = IN(node);
- ofw_real_start();
- argsptr = ofw_real_map(&args, sizeof(args));
- if (openfirmware((void *)argsptr) == -1) {
- ofw_real_stop();
- return (0);
- }
- ofw_real_unmap(argsptr, &args, sizeof(args));
- ofw_real_stop();
- return (OUT(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 = IN((cell_t)(uintptr_t)"child");
- args.nargs = IN(1);
- args.nreturns = IN(1);
- args.node = IN(node);
- ofw_real_start();
- argsptr = ofw_real_map(&args, sizeof(args));
- if (openfirmware((void *)argsptr) == -1) {
- ofw_real_stop();
- return (0);
- }
- ofw_real_unmap(argsptr, &args, sizeof(args));
- ofw_real_stop();
- return (OUT(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 = IN((cell_t)(uintptr_t)"parent");
- args.nargs = IN(1);
- args.nreturns = IN(1);
- args.node = IN(node);
- ofw_real_start();
- argsptr = ofw_real_map(&args, sizeof(args));
- if (openfirmware((void *)argsptr) == -1) {
- ofw_real_stop();
- return (0);
- }
- ofw_real_unmap(argsptr, &args, sizeof(args));
- ofw_real_stop();
- return (OUT(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 = IN((cell_t)(uintptr_t)"instance-to-package");
- args.nargs = IN(1);
- args.nreturns = IN(1);
- args.instance = IN(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 (OUT(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 = IN((cell_t)(uintptr_t)"getproplen");
- args.nargs = IN(2);
- args.nreturns = IN(1);
- ofw_real_start();
- args.package = IN(package);
- args.propname = IN(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 ((ssize_t)(int32_t)OUT(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 = IN((cell_t)(uintptr_t)"getprop");
- args.nargs = IN(4);
- args.nreturns = IN(1);
- ofw_real_start();
- args.package = IN(package);
- args.propname = IN(ofw_real_map(propname, strlen(propname) + 1));
- args.buf = IN(ofw_real_map(buf, buflen));
- args.buflen = IN(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(OUT(args.buf), buf, buflen);
- ofw_real_stop();
- return ((ssize_t)(int32_t)OUT(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 = IN((cell_t)(uintptr_t)"nextprop");
- args.nargs = IN(3);
- args.nreturns = IN(1);
- ofw_real_start();
- args.package = IN(package);
- args.previous = IN(ofw_real_map(previous, (previous != NULL) ? (strlen(previous) + 1) : 0));
- args.buf = IN(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(OUT(args.buf), buf, size);
- ofw_real_stop();
- return (OUT(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 = IN((cell_t)(uintptr_t)"setprop");
- args.nargs = IN(4);
- args.nreturns = IN(1);
- ofw_real_start();
- args.package = IN(package);
- args.propname = IN(ofw_real_map(propname, strlen(propname) + 1));
- args.buf = IN(ofw_real_map(buf, len));
- args.len = IN(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 (OUT(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 = IN((cell_t)(uintptr_t)"canon");
- args.nargs = IN(3);
- args.nreturns = IN(1);
- ofw_real_start();
- args.device = IN(ofw_real_map(device, strlen(device) + 1));
- args.buf = IN(ofw_real_map(buf, len));
- args.len = IN(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(OUT(args.buf), buf, len);
- ofw_real_stop();
- return ((ssize_t)(int32_t)OUT(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 = IN((cell_t)(uintptr_t)"finddevice");
- args.nargs = IN(1);
- args.nreturns = IN(1);
- ofw_real_start();
- args.device = IN(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 (OUT(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 = IN((cell_t)(uintptr_t)"instance-to-path");
- args.nargs = IN(3);
- args.nreturns = IN(1);
- ofw_real_start();
- args.instance = IN(instance);
- args.buf = IN(ofw_real_map(buf, len));
- args.len = IN(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(OUT(args.buf), buf, len);
- ofw_real_stop();
- return ((ssize_t)(int32_t)OUT(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 = IN((cell_t)(uintptr_t)"package-to-path");
- args.nargs = IN(3);
- args.nreturns = IN(1);
- ofw_real_start();
- args.package = IN(package);
- args.buf = IN(ofw_real_map(buf, len));
- args.len = IN(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(OUT(args.buf), buf, len);
- ofw_real_stop();
- return ((ssize_t)(int32_t)OUT(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 = IN((cell_t)(uintptr_t)"call-method");
- args.nargs = IN(2);
- args.nreturns = IN(1);
- if (nargs > 6)
- return (-1);
- ofw_real_start();
- args.nargs = IN(nargs + 2);
- args.nreturns = IN(nreturns + 1);
- args.method = IN(ofw_real_map(method, strlen(method) + 1));
- args.instance = IN(instance);
- ap = args_and_returns;
- for (cp = args.args_n_results + (n = nargs); --n >= 0;)
- *--cp = IN(*(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 (OUT(args.args_n_results[nargs]))
- return (OUT(args.args_n_results[nargs]));
- for (cp = args.args_n_results + nargs + (n = OUT(args.nreturns)); --n > 0;)
- *(ap++) = OUT(*--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 = IN((cell_t)(uintptr_t)"interpret");
- args.nargs = IN(1);
- ofw_real_start();
- args.nreturns = IN(++nreturns);
- args.slot[i++] = IN(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 = OUT(args.slot[i++]);
- while (i < 1 + nreturns)
- returns[j++] = OUT(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 = IN((cell_t)(uintptr_t)"open");
- args.nargs = IN(1);
- args.nreturns = IN(1);
- ofw_real_start();
- args.device = IN(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 (OUT(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 = IN((cell_t)(uintptr_t)"close");
- args.nargs = IN(1);
- args.nreturns = IN(0);
- args.instance = IN(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 = IN((cell_t)(uintptr_t)"read");
- args.nargs = IN(3);
- args.nreturns = IN(1);
- ofw_real_start();
- args.instance = IN(instance);
- args.addr = IN(ofw_real_map(addr, len));
- args.len = IN(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(OUT(args.addr), addr, len);
- ofw_real_stop();
- return ((ssize_t)(int32_t)OUT(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 = IN((cell_t)(uintptr_t)"write");
- args.nargs = IN(3);
- args.nreturns = IN(1);
- ofw_real_start();
- args.instance = IN(instance);
- args.addr = IN(ofw_real_map(addr, len));
- args.len = IN(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 ((ssize_t)(int32_t)OUT(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 = IN((cell_t)(uintptr_t)"seek");
- args.nargs = IN(3);
- args.nreturns = IN(1);
- args.instance = IN(instance);
- args.poshi = IN(pos >> 32);
- args.poslo = IN(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 (OUT(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 = IN((cell_t)(uintptr_t)"claim");
- args.nargs = IN(3);
- args.nreturns = IN(1);
- args.virt = IN((cell_t)(uintptr_t)virt);
- args.size = IN(size);
- args.align = IN(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)(OUT(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 = IN((cell_t)(uintptr_t)"release");
- args.nargs = IN(2);
- args.nreturns = IN(0);
- args.virt = IN((cell_t)(uintptr_t)virt);
- args.size = IN(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 = IN((cell_t)(uintptr_t)"enter");
- args.nargs = IN(0);
- args.nreturns = IN(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 = IN((cell_t)(uintptr_t)"exit");
- args.nargs = IN(0);
- args.nreturns = IN(0);
- ofw_real_start();
- argsptr = ofw_real_map(&args, sizeof(args));
- openfirmware((void *)argsptr);
- for (;;) /* just in case */
- ;
- ofw_real_stop();
- }
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