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150 lines
3.4 KiB
C
150 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (C) 2019 Leandro Lupori
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/linker_set.h>
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#include <sys/param.h>
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#include <sys/types.h>
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struct thread;
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <dev/ofw/openfirm.h>
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#include <gdb/gdb.h>
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#include "opal.h"
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static gdb_probe_f uart_opal_dbg_probe;
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static gdb_init_f uart_opal_dbg_init;
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static gdb_term_f uart_opal_dbg_term;
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static gdb_getc_f uart_opal_dbg_getc;
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static gdb_putc_f uart_opal_dbg_putc;
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GDB_DBGPORT(uart_opal, uart_opal_dbg_probe,
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uart_opal_dbg_init, uart_opal_dbg_term,
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uart_opal_dbg_getc, uart_opal_dbg_putc);
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static int64_t termnum;
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static int
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uart_opal_dbg_probe(void)
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{
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char buf[64];
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cell_t reg;
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phandle_t dev;
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if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
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return (-1);
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if ((dev = OF_finddevice(buf)) == -1)
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return (-1);
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if (OF_getprop(dev, "device_type", buf, sizeof(buf)) == -1)
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return (-1);
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if (strcmp(buf, "serial") != 0)
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return (-1);
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if (OF_getprop(dev, "compatible", buf, sizeof(buf)) == -1)
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return (-1);
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if (strcmp(buf, "ibm,opal-console-raw") != 0)
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return (-1);
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reg = ~0U;
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OF_getencprop(dev, "reg", ®, sizeof(reg));
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if (reg == ~0U)
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return (-1);
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termnum = reg;
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return (0);
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}
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static void
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uart_opal_dbg_init(void)
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{
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}
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static void
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uart_opal_dbg_term(void)
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{
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}
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static int
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uart_opal_dbg_getc(void)
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{
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char c;
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int err;
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int64_t len;
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uint64_t lenp, bufp;
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len = 1;
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if (pmap_bootstrapped) {
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lenp = vtophys(&len);
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bufp = vtophys(&c);
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} else {
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lenp = (uint64_t)&len;
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bufp = (uint64_t)&c;
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}
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err = opal_call(OPAL_CONSOLE_READ, termnum, lenp, bufp);
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if (err != OPAL_SUCCESS || len != 1)
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return (-1);
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opal_call(OPAL_POLL_EVENTS, NULL);
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return (c);
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}
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static void
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uart_opal_dbg_putc(int c)
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{
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char ch;
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int err;
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int64_t len;
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uint64_t lenp, bufp;
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ch = (unsigned char)c;
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len = 1;
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if (pmap_bootstrapped) {
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lenp = vtophys(&len);
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bufp = vtophys(&ch);
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} else {
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lenp = (uint64_t)&len;
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bufp = (uint64_t)&ch;
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}
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for (;;) {
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err = opal_call(OPAL_CONSOLE_WRITE, termnum, lenp, bufp);
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/* Clear FIFO if needed. */
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if (err == OPAL_BUSY_EVENT)
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opal_call(OPAL_POLL_EVENTS, NULL);
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else
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/* break on success or unrecoverable errors */
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break;
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}
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DELAY(100);
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}
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