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Re: [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes
From: |
Thomas Petazzoni |
Subject: |
Re: [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes |
Date: |
Wed, 26 Jan 2005 23:24:51 +0100 |
User-agent: |
Debian Thunderbird 1.0 (X11/20050116) |
Hello,
Fabrice Bellard wrote:
I would accept the "e9 hack" only if it was dynamically configurable and
if it used a generic character device (as the serial or parallel ports)
to output its results. The command line option should be '-port-e9
stdio' or something similar.
Enclosed is a first try to convert port E9 hack to use the character
device framework of Qemu.
I've tested vc, stdio, null and pty outputs. They all work.
Some comments :
- Support is limited to one port E9, so I've added a #error assertion
in vl.h. I'm not sure if's the correct place, correct way to do it.
- Port E9 doesn't support reading, so I have not implemented read
event handlers. The purpose of the ioport_read function is only to
return 0xE9. This allows the guest OS to test whether the port E9 hack
is available or not.
Feedback welcome.
Thomas
--
PETAZZONI Thomas - address@hidden
http://thomas.enix.org - Jabber: address@hidden
KOS: http://kos.enix.org/ - SOS: http://sos.enix.org
Fingerprint : 0BE1 4CF3 CEA4 AC9D CC6E 1624 F653 CB30 98D3 F7A7
Index: Makefile.target
===================================================================
RCS file: /cvsroot/qemu/qemu/Makefile.target,v
retrieving revision 1.55
diff -u -u -r1.55 Makefile.target
--- Makefile.target 15 Jan 2005 12:02:56 -0000 1.55
+++ Makefile.target 26 Jan 2005 22:20:17 -0000
@@ -316,7 +316,7 @@
# Hardware support
VL_OBJS+= ide.o ne2000.o pckbd.o vga.o $(SOUND_HW) dma.o $(AUDIODRV)
VL_OBJS+= fdc.o mc146818rtc.o serial.o i8259.o i8254.o pc.o
-VL_OBJS+= cirrus_vga.o mixeng.o apic.o parallel.o
+VL_OBJS+= cirrus_vga.o mixeng.o apic.o parallel.o port-e9.o
endif
ifeq ($(TARGET_ARCH), ppc)
VL_OBJS+= ppc.o ide.o ne2000.o pckbd.o vga.o $(SOUND_HW) dma.o $(AUDIODRV)
Index: vl.c
===================================================================
RCS file: /cvsroot/qemu/qemu/vl.c,v
retrieving revision 1.117
diff -u -u -r1.117 vl.c
--- vl.c 15 Jan 2005 21:50:11 -0000 1.117
+++ vl.c 26 Jan 2005 22:20:19 -0000
@@ -136,6 +136,7 @@
int full_screen = 0;
TextConsole *vga_console;
CharDriverState *serial_hds[MAX_SERIAL_PORTS];
+CharDriverState *port_e9_hds[MAX_PORT_E9_PORTS];
CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
/***********************************************************/
@@ -2845,6 +2846,7 @@
QEMU_OPTION_monitor,
QEMU_OPTION_serial,
QEMU_OPTION_parallel,
+ QEMU_OPTION_port_e9,
QEMU_OPTION_loadvm,
QEMU_OPTION_full_screen,
QEMU_OPTION_pidfile,
@@ -2908,6 +2910,7 @@
{ "monitor", 1, QEMU_OPTION_monitor },
{ "serial", 1, QEMU_OPTION_serial },
{ "parallel", 1, QEMU_OPTION_parallel },
+ { "port-e9", 1, QEMU_OPTION_port_e9 },
{ "loadvm", HAS_ARG, QEMU_OPTION_loadvm },
{ "full-screen", 0, QEMU_OPTION_full_screen },
{ "pidfile", HAS_ARG, QEMU_OPTION_pidfile },
@@ -2990,6 +2993,8 @@
char monitor_device[128];
char serial_devices[MAX_SERIAL_PORTS][128];
int serial_device_index;
+ char port_e9_devices[MAX_PORT_E9_PORTS][128];
+ int port_e9_device_index;
char parallel_devices[MAX_PARALLEL_PORTS][128];
int parallel_device_index;
const char *loadvm = NULL;
@@ -3029,7 +3034,12 @@
for(i = 1; i < MAX_PARALLEL_PORTS; i++)
parallel_devices[i][0] = '\0';
parallel_device_index = 0;
-
+
+ pstrcpy(port_e9_devices[0], sizeof(port_e9_devices[0]), "vc");
+ for(i = 1; i < MAX_PORT_E9_PORTS; i++)
+ port_e9_devices[i][0] = '\0';
+ port_e9_device_index = 0;
+
nb_tun_fds = 0;
net_if_type = -1;
nb_nics = 1;
@@ -3349,6 +3359,15 @@
sizeof(parallel_devices[0]), optarg);
parallel_device_index++;
break;
+ case QEMU_OPTION_port_e9:
+ if (port_e9_device_index >= MAX_PORT_E9_PORTS) {
+ fprintf(stderr, "qemu: too many port e9 ports\n");
+ exit(1);
+ }
+ pstrcpy(port_e9_devices[port_e9_device_index],
+ sizeof(port_e9_devices[0]), optarg);
+ port_e9_device_index++;
+ break;
case QEMU_OPTION_loadvm:
loadvm = optarg;
break;
@@ -3585,6 +3604,19 @@
}
}
+ for(i = 0; i < MAX_PORT_E9_PORTS; i++) {
+ if (port_e9_devices[i][0] != '\0') {
+ port_e9_hds[i] = qemu_chr_open(port_e9_devices[i]);
+ if (!port_e9_hds[i]) {
+ fprintf(stderr, "qemu: could not open port e9 device '%s'\n",
+ port_e9_devices[i]);
+ exit(1);
+ }
+ if (!strcmp(port_e9_devices[i], "vc"))
+ qemu_chr_printf(port_e9_hds[i], "port_e9_%d console\n", i);
+ }
+ }
+
/* setup cpu signal handlers for MMU / self modifying code handling */
#if !defined(CONFIG_SOFTMMU)
Index: vl.h
===================================================================
RCS file: /cvsroot/qemu/qemu/vl.h,v
retrieving revision 1.66
diff -u -u -r1.66 vl.h
--- vl.h 15 Jan 2005 12:02:56 -0000 1.66
+++ vl.h 26 Jan 2005 22:20:19 -0000
@@ -230,6 +230,16 @@
extern CharDriverState *parallel_hds[MAX_PARALLEL_PORTS];
+/* port E9 ports */
+
+#define MAX_PORT_E9_PORTS 1
+
+#if (MAX_PORT_E9_PORTS != 1)
+ #error "No more than one port E9 is supported"
+#endif
+
+extern CharDriverState *port_e9_hds[MAX_PORT_E9_PORTS];
+
/* network redirectors support */
#define MAX_NICS 8
@@ -643,6 +653,10 @@
typedef struct ParallelState ParallelState;
ParallelState *parallel_init(int base, int irq, CharDriverState *chr);
+/* port-e9.c */
+
+CharDriverState *port_e9_init(CharDriverState *chr);
+
/* i8259.c */
void pic_set_irq(int irq, int level);
Index: hw/pc.c
===================================================================
RCS file: /cvsroot/qemu/qemu/hw/pc.c,v
retrieving revision 1.35
diff -u -u -r1.35 pc.c
--- hw/pc.c 15 Jan 2005 12:02:56 -0000 1.35
+++ hw/pc.c 26 Jan 2005 22:20:19 -0000
@@ -547,6 +547,12 @@
}
}
+ for(i = 0; i < MAX_PORT_E9_PORTS; i++) {
+ if(port_e9_hds[i]) {
+ port_e9_init(port_e9_hds[i]);
+ }
+ }
+
if (pci_enabled) {
for(i = 0; i < nb_nics; i++) {
pci_ne2000_init(pci_bus, &nd_table[i]);
/*
* QEMU Port 0xe9 hack
*
* Copyright (c) 2000-2004 E. Marty, the bochs team, D. Decotigny
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <unistd.h>
#include <inttypes.h>
#include "vl.h"
static void port_e9_write(void *opaque, uint32_t address, uint32_t data)
{
CharDriverState *chr;
chr = opaque;
qemu_chr_write(chr, & data, 1);
}
static uint32_t port_e9_read(void *opaque, uint32_t address)
{
return 0xE9;
}
CharDriverState *port_e9_init (CharDriverState *chr)
{
register_ioport_write(0xe9, 1, 1, port_e9_write, chr);
register_ioport_read (0xe9, 1, 1, port_e9_read, chr);
return chr;
}
- [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes, Thomas Petazzoni, 2005/01/15
- Re: [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes, Johannes Schindelin, 2005/01/17
- Re: [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes, Thomas Petazzoni, 2005/01/17
- Re: [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes, Fabrice Bellard, 2005/01/17
- Re: [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes,
Thomas Petazzoni <=
- Re: [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes, James Mastros, 2005/01/26
- Re: [Qemu-devel] [PATCH] Port E9 hack, for debugging purposes, Thomas Petazzoni, 2005/01/27