Target support for qemu -M mips

With serial, NE2000, IDE support. Tested in big-endian mode. Memory size hard-coded to 128M for now, so don't play with the -m option.

Hi Vlad,

Quoted 4 lines · Vlad Lungu

With serial, NE2000, IDE support. Tested in big-endian mode. Memory size hard-coded to 128M for now, so don't play with the -m option.

very interesting B-). Applied to u-boot-mips/testing branch.

I'd like to give it a try, but I have to admit that I've never tested qemu for U-Boot/Mips; I've tested only with Linux/Mips kernel. Could you give me some HOWTOs, steps to reproduce, expected output results, etc. Or any usuful pointers...

Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>

include/configs/qemu-mips.h +0 -0

index 1f93ad7..3a02342 100644
@@ -112,6 +112,11 @@
 

Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>

include/configs/qemu-mips.h +5 -0

index 1f93ad7..3a02342 100644
@@ -112,6 +112,11 @@
 
 #define	CFG_PROMPT		"qemu-mips # "	/* Monitor Command Prompt    */
 
+#define CONFIG_AUTO_COMPLETE
+#define CONFIG_CMDLINE_EDITING
+#define CFG_HUSH_PARSER
+#define CFG_PROMPT_HUSH_PS2	"> "
+
 #define	CFG_CBSIZE		256		/* Console I/O Buffer Size   */
 #define	CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16)  /* Print Buffer Size */
 #define	CFG_MAXARGS		16		/* max number of command args*/

Signature · 1 line

1.5.3.7

Could review this patch please?

make qemu_mips_config ; make

Copy (or symlink) u-boot.bin to mips_bios.bin and launch qemu-system-mips -L . /dev/null
-L . so that qemu picks the BIOS from the current directory and /dev/null because qemu wants a disk image. Qemu willl load and launch U-Boot.

Add -hda file.img to Qemu cmd line in order to emulate a hard-disk and do ide reset
at the U-Boot prompt ; the disk (or disks) should be identified. Check U-Boot doc for booting fromHD :-)

Add -tftp / and then do dhcp (or directly tftp) and then bootelf (on vmlinux) or bootm (on uimage).

Main purpose is to be able to develop U-Boot modules with no hardware. Secondary is for me to learn how it works :-) in order
to develop a free BIOS for the MTI Malta board, as emulated by Qemu (comes with PCI and stuff). Or even for the real board. I have that sort-of-working too, but I'm not very happy with the PCI bus driver .

Quoted 8 lines · Vlad Lungu

make qemu_mips_config ; make

Copy (or symlink) u-boot.bin to mips_bios.bin and launch qemu-system-mips -L . /dev/null
-L . so that qemu picks the BIOS from the current directory and /dev/null because qemu wants a disk image. Qemu willl load and launch U-Boot.

$ cd u-boot.git
$ make distclean
$ make qemu_mips_config
$ make CROSS_COMPILE=mips-linux-
$ cp -a u-boot.bin mips_bios.bin
$ qemu-system-mips -L . /dev/nulll

at this point, qemu console window appears but I can't see any u-boot's bootlog. I tried qemu on Debian testing or the latest CVS, but the same results.

I use u-boot-1.3.1 + qemu patch, gcc 4.2.1 and binutils 2.18.50.0.1.

Am I miss something?

Shinya

Quoted 17 lines · Shinya Kuribayashi

Quoted 8 lines · Vlad Lungu

make qemu_mips_config ; make

Copy (or symlink) u-boot.bin to mips_bios.bin and launch qemu-system-mips -L . /dev/null
-L . so that qemu picks the BIOS from the current directory and /dev/null because qemu wants a disk image. Qemu willl load and launch U-Boot.

$ cd u-boot.git
$ make distclean
$ make qemu_mips_config
$ make CROSS_COMPILE=mips-linux-
$ cp -a u-boot.bin mips_bios.bin
$ qemu-system-mips -L . /dev/nulll

Quoted 5 lines

at this point, qemu console window appears but I can't see any u-boot's bootlog. I tried qemu on Debian testing or the latest CVS, but the same results.

I've test it on debian unstable with qemu from it and it's work with this cmd

qemu-system-mips -L . /dev/null -nographic

Quoted 28 lines · Jean-Christophe PLAGNIOL-VILLARD

Quoted 17 lines · Shinya Kuribayashi

Quoted 8 lines · Vlad Lungu

make qemu_mips_config ; make

Copy (or symlink) u-boot.bin to mips_bios.bin and launch qemu-system-mips -L . /dev/null
-L . so that qemu picks the BIOS from the current directory and /dev/null because qemu wants a disk image. Qemu willl load and launch U-Boot.

$ cd u-boot.git
$ make distclean
$ make qemu_mips_config
$ make CROSS_COMPILE=mips-linux-
$ cp -a u-boot.bin mips_bios.bin
$ qemu-system-mips -L . /dev/nulll

Quoted 5 lines

at this point, qemu console window appears but I can't see any u-boot's bootlog. I tried qemu on Debian testing or the latest CVS, but the same results.

I've test it on debian unstable with qemu from it and it's work with this cmd

Quoted 2 lines

qemu-system-mips -L . /dev/null -nographic

Thanks, J-C. You beat me to it. It's etiher that to work without a graphical interface or press Ctrl-Alt-3 to get to
the serial console (Ctrl-Alt-2 is the qemu monitor shortcut, Ctrl-Alt-1 is the VGA emulation, unused and probably not working).

With serial, NE2000, IDE support. Tested in big-endian mode. Memory size hard-coded to 128M for now, so don't play with the -m option.

Signed-off-by Vlad Lungu <[email protected]>

---

MAKEALL                         |    1 +
Makefile                        |    6 ++
board/qemu-mips/Makefile        |   45 +++++++++++
board/qemu-mips/README          |   11 +++
board/qemu-mips/config.mk       |   11 +++
board/qemu-mips/flash.c         |   43 ++++++++++
board/qemu-mips/lowlevel_init.S |   41 ++++++++++
board/qemu-mips/qemu-mips.c     |   89 +++++++++++++++++++++
board/qemu-mips/u-boot.lds      |   70 +++++++++++++++++
include/configs/qemu-mips.h     |  164 
+++++++++++++++++++++++++++++++++++++++
10 files changed, 481 insertions(+), 0 deletions(-)

create mode 100644 board/qemu-mips/Makefile create mode 100644 board/qemu-mips/README create mode 100644 board/qemu-mips/config.mk create mode 100644 board/qemu-mips/flash.c create mode 100644 board/qemu-mips/lowlevel_init.S create mode 100644 board/qemu-mips/qemu-mips.c create mode 100644 board/qemu-mips/u-boot.lds create mode 100644 include/configs/qemu-mips.h

MAKEALL +1 -0

index a02412b..7647d67 100755
@@ -524,6 +524,7 @@ LIST_arm="        \
 
 LIST_mips4kc="        \
    incaip        \
+    qemu_mips    \

"

LIST_mips5kc=" \

Makefile +0 -0

index 1ff80b5..3e1b074 100644

Makefile +5 -0

+    @mkdir -p $(obj)include
+    @ >$(obj)include/config.h
+    @echo "#define CONFIG_QEMU_MIPS 1" >>$(obj)include/config.h
+    @$(MKCONFIG) -a qemu-mips mips mips qemu-mips
+
 #########################################################################
 ## MIPS64 5Kc
 #########################################################################

board/qemu-mips/Makefile new file +45 -0

new file mode 100644
index 0000000..23be447
@@ -0,0 +1,45 @@
+#
+# (C) Copyright 2003-2006
+# Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB    = $(obj)lib$(BOARD).a
+
+COBJS    = $(BOARD).o flash.o
+SOBJS    = lowlevel_init.o
+
+SRCS    := $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS    := $(addprefix $(obj),$(COBJS))
+SOBJS    := $(addprefix $(obj),$(SOBJS))
+
+$(LIB):     $(OBJS) $(SOBJS)
+    $(AR) $(ARFLAGS) $@ $(OBJS) $(SOBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################

board/qemu-mips/README new file +11 -0

new file mode 100644
index 0000000..39570b1
@@ -0,0 +1,11 @@
+By Vlad Lungu vlad at comsys.ro 2007-Oct-01
+----------------------------------------
+Qemu is a full system emulator. See
+
+http://fabrice.bellard.free.fr/qemu
+
+Limitations & comments
+----------------------
+Supports the "-m mips" configuration of qemu: serial,NE2000,IDE.
+Support is big endian only for now (or at least this is what I tested).
+Derived from au1x00 with a lot of things cut out.

board/qemu-mips/config.mk new file +0 -0

new file mode 100644
index 0000000..61269ce

board/qemu-mips/config.mk new file +10 -0

+#
+# Qemu -M mips system emulator
+# See http://fabrice.bellard.free.fr/qemu
+#
+
+# ROM version
+TEXT_BASE = 0xbfc00000
+
+# RAM version
+#TEXT_BASE = 0x80001000

board/qemu-mips/flash.c new file +26 -0

new file mode 100644
index 0000000..49f0134
@@ -0,0 +1,43 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#if 0
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];    /* info for FLASH 

chips */
+#endif

board/qemu-mips/flash.c new file +10 -0

+{
+    printf ("Skipping flash_init\n");
+    return (0);
+}
+
+int write_buff ( void * info, uchar * src, ulong addr, ulong cnt)
+{
+    printf ("write_buff not implemented\n");
+    return (-1);
+}

board/qemu-mips/lowlevel_init.S new file +41 -0

new file mode 100644
index 0000000..28166bc
@@ -0,0 +1,41 @@
+/* Memory sub-system initialization code */
+
+#include <config.h>
+#include <version.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+
+    .text
+    .set noreorder
+    .set mips32
+
+    .globl    lowlevel_init
+lowlevel_init:
+
+    /*
+     * Step 2) Establish Status Register
+     * (set BEV, clear ERL, clear EXL, clear IE)
+     */
+    li    t1, 0x00400000
+    mtc0    t1, CP0_STATUS
+
+    /*
+     * Step 3) Establish CP0 Config0
+     * (set K0=3)
+     */
+    li    t1, 0x00000003
+    mtc0    t1, CP0_CONFIG
+
+    /*
+     * Step 7) Establish Cause
+     * (set IV bit)
+     */
+    li    t1, 0x00800000
+    mtc0    t1, CP0_CAUSE
+
+    /* Establish Wired (and Random) */
+    mtc0    zero, CP0_WIRED
+    nop
+
+    j    ra
+    nop

board/qemu-mips/qemu-mips.c new file +26 -0

new file mode 100644
index 0000000..345bb95
@@ -0,0 +1,89 @@
+/*
+ * (C) Copyright 2007
+ * Vlad Lungu vlad at comsys.ro
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/mipsregs.h>

board/qemu-mips/qemu-mips.c new file +43 -0

+int checkboard (void)
+{
+    u32 proc_id;
+    u32 config1;
+
+    proc_id = read_32bit_cp0_register(CP0_PRID);
+    printf("Board: Qemu -M mips CPU: ");
+    switch (proc_id) {
+    case 0x00018000:
+        printf("4Kc");
+        break;
+    case 0x00018400:
+        printf("4KEcR1");
+        break;
+    case 0x00019000:
+        printf("4KEc");
+        break;
+    case 0x00019300:
+        config1 = read_mips32_cp0_config1();
+        if (config1&1)
+            printf("24Kf");
+            else
+            printf("24Kc");
+        break;
+    case 0x00019500:
+        printf("34Kf");
+        break;
+    case 0x00000400:
+        printf("R4000");
+        break;
+    case 0x00018100:
+        config1 = read_mips32_cp0_config1();
+        if (config1&1)
+            printf("5Kf");
+            else
+            printf("5Kc");
+        break;
+    case 0x000182a0:
+        printf("20Kc");
+        break;
+
+    default:
+        printf("unknown");

board/qemu-mips/u-boot.lds new file +27 -0

new file mode 100644
index 0000000..8793320
@@ -0,0 +1,70 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk Engineering, <[email protected]>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+OUTPUT_FORMAT("elf32-bigmips", "elf32-bigmips", "elf32-bigmips")
+*/
+OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", 

"elf32-tradbigmips")

board/qemu-mips/u-boot.lds new file +31 -0

+OUTPUT_ARCH(mips)
+ENTRY(_start)
+SECTIONS
+{
+    . = 0x00000000;
+
+    . = ALIGN(4);
+    .text       :
+    {
+      *(.text)
+    }
+
+    . = ALIGN(4);
+    .rodata  : { *(.rodata) }
+
+    . = ALIGN(4);
+    .data  : { *(.data) }
+
+    . = ALIGN(16);
+    _gp = .;
+
+    .got  : { +    __got_start = .;
+        *(.got) +    __got_end = .;
+    }
+
+    . = ALIGN(4);
+    .sdata  : { *(.sdata) }
+
+    . = .;
+    __u_boot_cmd_start = .;
+    .u_boot_cmd : { *(.u_boot_cmd) }

include/configs/qemu-mips.h new file +113 -0

new file mode 100644
index 0000000..1f93ad7
@@ -0,0 +1,164 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * This file contains the configuration parameters for the dbau1x00 board.
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#define CONFIG_MIPS32        1  /* MIPS32 CPU core    */
+#define CONFIG_QEMU_MIPS        1
+#define CONFIG_MISC_INIT_R
+
+#undef DEBUG
+
+/*IP address is default used by Qemu*/
+#define CONFIG_IPADDR        10.0.2.15             /* Our IP address */
+#define CONFIG_SERVERIP        10.0.2.2         /* Server IP address*/
+
+#define CONFIG_BOOTDELAY    10    /* autoboot after 10 seconds    */
+
+#define CONFIG_BAUDRATE        115200
+
+/* valid baudrates */
+#define CFG_BAUDRATE_TABLE    { 9600, 19200, 38400, 57600, 115200 }
+
+#define    CONFIG_TIMESTAMP        /* Print image info with timestamp */
+#undef    CONFIG_BOOTARGS
+
+#define    CONFIG_EXTRA_ENV_SETTINGS                    \
+    "addmisc=setenv bootargs ${bootargs} "                \
+        "console=ttyS0,${baudrate} "                \
+        "panic=1\0"                        \
+    "bootfile=/tftpboot/vmlinux\0"                \
+    "load=tftp 80500000 ${u-boot}\0"                \
+    ""
+
+#define CONFIG_BOOTCOMMAND    "bootp;bootelf"
+
+
+/*
+ * BOOTP options
+ */
+#define CONFIG_BOOTP_BOOTFILESIZE
+#define CONFIG_BOOTP_BOOTPATH
+#define CONFIG_BOOTP_GATEWAY
+#define CONFIG_BOOTP_HOSTNAME
+
+
+/*
+ * Command line configuration.
+ */
+#include <config_cmd_default.h>
+
+#define CONFIG_CMD_ELF
+#define CONFIG_CMD_FAT
+#define CONFIG_CMD_EXT2
+#undef  CONFIG_CMD_IMLS
+#undef  CONFIG_CMD_FLASH
+#undef  CONFIG_CMD_LOADB
+#undef  CONFIG_CMD_LOADS
+#define CONFIG_CMD_DHCP
+
+#define CONFIG_DRIVER_NE2000
+#define CONFIG_DRIVER_NE2000_BASE    (0xb4000300)
+
+#define CFG_NO_FLASH
+#define CFG_NS16550
+#define CFG_NS16550_SERIAL
+#define CFG_NS16550_REG_SIZE    1
+#define CFG_NS16550_CLK         115200
+#define CFG_NS16550_COM1        (0xb40003f8)
+#define CONFIG_CONS_INDEX    1
+
+#define CONFIG_CMD_IDE
+#define CONFIG_DOS_PARTITION
+
+#define CFG_IDE_MAXBUS    2
+#define CFG_ATA_IDE0_OFFSET    (0x1f0)
+#define CFG_ATA_IDE1_OFFSET    (0x170)
+#define CFG_ATA_DATA_OFFSET    (0)
+#define CFG_ATA_REG_OFFSET    (0)
+#define CFG_ATA_BASE_ADDR    (0xb4000000)
+
+#define CFG_IDE_MAXDEVICE    (4)
+
+/*
+ * Miscellaneous configurable options
+ */
+#define    CFG_LONGHELP                /* undef to save memory      */
+
+#define    CFG_PROMPT        "qemu-mips # "    /* Monitor Command 

Prompt */

include/configs/qemu-mips.h new file +3 -0

+
+#define    CFG_CBSIZE        256        /* Console I/O Buffer Size   */
+#define    CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16)  /* Print 

Buffer Size */

include/configs/qemu-mips.h new file +9 -0

+#define    CFG_MAXARGS        16        /* max number of command args*/
+
+#define CFG_MALLOC_LEN        128*1024
+
+#define CFG_BOOTPARAMS_LEN    128*1024
+
+#define CFG_MHZ            132
+
+#define CFG_HZ                  (CFG_MHZ * 1000000) /* FIXME causes 

overflow in net.c */

include/configs/qemu-mips.h new file +4 -0

+
+#define CFG_SDRAM_BASE        0x80000000     /* Cached addr */
+
+#define    CFG_LOAD_ADDR        0x81000000     /* default load 

address */

include/configs/qemu-mips.h new file +25 -0

+
+#define CFG_MEMTEST_START    0x80100000
+#define CFG_MEMTEST_END        0x80800000
+
+/*-----------------------------------------------------------------------
+ * FLASH and environment organization
+ */
+
+/* The following #defines are needed to get flash environment right */
+#define    CFG_MONITOR_BASE    TEXT_BASE
+#define    CFG_MONITOR_LEN        (192 << 10)
+
+#define CFG_INIT_SP_OFFSET    0x400000
+
+/* We boot from this flash, selected with dip switch */
+#define CFG_FLASH_BASE        0xbfc00000
+
+#define    CFG_ENV_IS_NOWHERE    1
+
+/* Address and size of Primary Environment Sector    */
+#define CFG_ENV_SIZE        0x10000
+#undef CONFIG_NET_MULTI
+
+#define MEM_SIZE 128
+

Dear Vlad,

There are some coding style issues, but I'm fine with contents of the patch itself. Please find comments below and resubmit.

please update .lds to the latest board/dbau1x00/u-boot.lds, etc. I'd like to see

	. = .;

	_gp = ALIGN(16) + 0x7ff0;
and
	.u_boot_cmd : {
	  __u_boot_cmd_start = .;
	  *(.u_boot_cmd)
	  __u_boot_cmd_end = .;
	}

and so on. I understand it works well without such changes, but it's better to keep all target together.

Quoted 4 lines

please update .lds to the latest board/dbau1x00/u-boot.lds, etc. I'd like to see

	. = .;

What does this do ?

Quoted 1 line

	_gp = ALIGN(16) + 0x7ff0;

Any opinions on using a single ldscript per platform, eventually preprocessed with gcc -E to allow
for board-specific differences? At least for MIPS, all scripts are essentally the same.

Quoted 5 lines

Any opinions on using a single ldscript per platform, eventually preprocessed with gcc -E to allow
for board-specific differences? At least for MIPS, all scripts are essentally the same.

Looking at cpu/mpc5xxx/u-boot.lds, it seems good. Or something like linux/arch/mips/kernel/vmlinux.lds.S is good alternative (I don't know whether it's possible or not, though).