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ofw_initrd.c
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ofw_machdep.c
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ofw_pcib_pci.c
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ofw_pcibus.c
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ofw_pcibus.h
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ofw_real.c
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ofw_syscons.c
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ofw_syscons.h
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ofwcall32.S
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ofwcall64.S
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openpic_ofw.c
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rtas.c
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Editing: ofw_real.c
/* $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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