97995404be
It is disabled by default. You need to put LOADER_FIREWIRE_SUPPORT=yes in /etc/make.conf and rebuild loader to enable it. (cd /sys/boot/i386 && make clean && make && make install) You can find a short introduction of dcons at http://wiki.freebsd.org/DebugWithDcons
128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/*-
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* Copyright (c) 2004 Hidetoshi Shimokawa
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include <bootstrap.h>
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#include <sys/param.h>
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#include <btxv86.h>
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#include <dev/dcons/dcons.h>
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void fw_enable(void);
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void fw_poll(void);
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static void dconsole_probe(struct console *cp);
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static int dconsole_init(int arg);
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static void dconsole_putchar(int c);
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static int dconsole_getchar(void);
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static int dconsole_ischar(void);
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static int dcons_started = 0;
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#define DCONS_BUF_SIZE (64*1024)
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static struct dcons_softc sc[DCONS_NPORT];
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uint32_t dcons_paddr;
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/* The buffer must be allocated in BSS becase:
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* - The dcons driver in the kernel is initialized before VM/pmap is
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* initialized, so that the buffer must be allocate in the region
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* that is mapped at the very early boot state.
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* - We expect identiy map only for regions before KERNLOAD
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* (i386:4MB amd64:1MB).
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* - It seems that heap in conventional memory(640KB) is not sufficent
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* and we move it to high address as LOADER_SUPPORT_BZIP2.
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* - BSS is placed in conventional memory.
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*/
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static char dcons_buffer[DCONS_BUF_SIZE + PAGE_SIZE];
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struct console dconsole = {
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"dcons",
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"dumb console port",
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0,
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dconsole_probe,
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dconsole_init,
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dconsole_putchar,
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dconsole_getchar,
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dconsole_ischar
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};
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#define DCONSOLE_AS_MULTI_CONSOLE 1
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static void
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dconsole_probe(struct console *cp)
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{
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/* XXX check the BIOS equipment list? */
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cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
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#if DCONSOLE_AS_MULTI_CONSOLE
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dconsole_init(0);
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cp->c_flags |= (C_ACTIVEIN | C_ACTIVEOUT);
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#endif
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}
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static int
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dconsole_init(int arg)
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{
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char buf[16], *dbuf;
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int size;
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if (dcons_started && arg == 0)
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return 0;
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dcons_started = 1;
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size = DCONS_BUF_SIZE;
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dbuf = (char *)round_page((vm_offset_t)&dcons_buffer[0]);
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dcons_paddr = VTOP(dbuf);
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sprintf(buf, "0x%08x", dcons_paddr);
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setenv("dcons.addr", buf, 1);
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dcons_init((struct dcons_buf *)dbuf, size, sc);
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sprintf(buf, "%d", size);
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setenv("dcons.size", buf, 1);
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fw_enable();
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return(0);
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}
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static void
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dconsole_putchar(int c)
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{
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dcons_putc(&sc[0], c);
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}
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static int
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dconsole_getchar(void)
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{
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fw_poll();
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return (dcons_checkc(&sc[0]));
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}
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static int
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dconsole_ischar(void)
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{
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fw_poll();
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return (dcons_ischar(&sc[0]));
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}
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