| 0,0 → 1,154 |
|---|
| /* |
| * Copyright (C) 2005 Martin Decky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - 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. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR 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. |
| */ |
| |
| /** @addtogroup genarch |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <genarch/ofw/ofw.h> |
| #include <arch/asm.h> |
| #include <stdarg.h> |
| #include <cpu.h> |
| #include <arch/types.h> |
| |
| uintptr_t ofw_cif; /**< OpenFirmware Client Interface address. */ |
| |
| phandle ofw_chosen; |
| ihandle ofw_stdout; |
| ihandle ofw_mmu; |
| |
| void ofw_init(void) |
| { |
| ofw_chosen = ofw_find_device("/chosen"); |
| if (ofw_chosen == -1) |
| ofw_done(); |
| |
| if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0) |
| ofw_stdout = 0; |
| |
| if (ofw_get_property(ofw_chosen, "mmu", &ofw_mmu, sizeof(ofw_mmu)) <= 0) |
| ofw_mmu = 0; |
| } |
| |
| void ofw_done(void) |
| { |
| (void) ofw_call("exit", 0, 1, NULL); |
| cpu_halt(); |
| } |
| |
| /** Perform a call to OpenFirmware client interface. |
| * |
| * @param service String identifying the service requested. |
| * @param nargs Number of input arguments. |
| * @param nret Number of output arguments. This includes the return value. |
| * @param rets Buffer for output arguments or NULL. The buffer must accomodate nret - 1 items. |
| * |
| * @return Return value returned by the client interface. |
| */ |
| ofw_arg_t ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets, ...) |
| { |
| va_list list; |
| ofw_args_t args; |
| int i; |
| |
| args.service = service; |
| args.nargs = nargs; |
| args.nret = nret; |
| |
| va_start(list, rets); |
| for (i = 0; i < nargs; i++) |
| args.args[i] = va_arg(list, ofw_arg_t); |
| va_end(list); |
| |
| for (i = 0; i < nret; i++) |
| args.args[i + nargs] = 0; |
| |
| (void) ofw(&args); |
| |
| for (i = 1; i < nret; i++) |
| rets[i - 1] = args.args[i + nargs]; |
| |
| return args.args[nargs]; |
| } |
| |
| void ofw_putchar(const char ch) |
| { |
| if (ofw_stdout == 0) |
| return; |
| |
| (void) ofw_call("write", 3, 1, NULL, ofw_stdout, &ch, 1); |
| } |
| |
| phandle ofw_find_device(const char *name) |
| { |
| return (phandle) ofw_call("finddevice", 1, 1, NULL, name); |
| } |
| |
| int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen) |
| { |
| return (int) ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen); |
| } |
| |
| /** Translate virtual address to physical address using OpenFirmware. |
| * |
| * Use this function only when OpenFirmware is in charge. |
| * |
| * @param virt Virtual address. |
| * @return NULL on failure or physical address on success. |
| */ |
| void *ofw_translate(const void *virt) |
| { |
| ofw_arg_t result[4]; |
| int shift; |
| |
| if (!ofw_mmu) |
| return NULL; |
| |
| if (ofw_call("call-method", 3, 5, result, "translate", ofw_mmu, virt) != 0) |
| return NULL; |
| |
| if (result[0] != -1) |
| return NULL; |
| |
| if (sizeof(unative_t) == 8) |
| shift = 32; |
| else |
| shift = 0; |
| |
| return (void *) ((result[2]<<shift)|result[3]); |
| } |
| |
| void *ofw_claim(const void *addr, const int size, const int align) |
| { |
| return (void *) ofw_call("claim", 3, 1, NULL, addr, size, align); |
| } |
| |
| /** @} |
| */ |