MIPS: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.
Signed-off-by: Vlad Lungu <vlad@comsys.ro>
diff --git a/board/qemu-mips/Makefile b/board/qemu-mips/Makefile
new file mode 100644
index 0000000..23be447
--- /dev/null
+++ b/board/qemu-mips/Makefile
@@ -0,0 +1,45 @@
+#
+# (C) Copyright 2003-2006
+# Wolfgang Denk, DENX Software Engineering, wd@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
+
+#########################################################################
diff --git a/board/qemu-mips/README b/board/qemu-mips/README
new file mode 100644
index 0000000..39570b1
--- /dev/null
+++ b/board/qemu-mips/README
@@ -0,0 +1,11 @@
+By Vlad Lungu vlad@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.
diff --git a/board/qemu-mips/config.mk b/board/qemu-mips/config.mk
new file mode 100644
index 0000000..4d4078a
--- /dev/null
+++ b/board/qemu-mips/config.mk
@@ -0,0 +1,10 @@
+#
+# Qemu -M mips system emulator
+# See http://fabrice.bellard.free.fr/qemu
+#
+
+# ROM version
+TEXT_BASE = 0xbfc00000
+
+# RAM version
+#TEXT_BASE = 0x80001000
diff --git a/board/qemu-mips/flash.c b/board/qemu-mips/flash.c
new file mode 100644
index 0000000..e988272
--- /dev/null
+++ b/board/qemu-mips/flash.c
@@ -0,0 +1,40 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@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>
+/*-----------------------------------------------------------------------
+ * flash_init()
+ *
+ * sets up flash_info and returns size of FLASH (bytes)
+ */
+unsigned long flash_init(void)
+{
+ 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);
+}
diff --git a/board/qemu-mips/lowlevel_init.S b/board/qemu-mips/lowlevel_init.S
new file mode 100644
index 0000000..28166bc
--- /dev/null
+++ b/board/qemu-mips/lowlevel_init.S
@@ -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
diff --git a/board/qemu-mips/qemu-mips.c b/board/qemu-mips/qemu-mips.c
new file mode 100644
index 0000000..a6ad7b9
--- /dev/null
+++ b/board/qemu-mips/qemu-mips.c
@@ -0,0 +1,89 @@
+/*
+ * (C) Copyright 2007
+ * Vlad Lungu vlad@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>
+#include <asm/io.h>
+
+long int initdram(int board_type)
+{
+ /* Sdram is setup by assembler code */
+ /* If memory could be changed, we should return the true value here */
+ return MEM_SIZE*1024*1024;
+}
+
+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");
+ }
+ printf(" proc_id=0x%x\n", proc_id);
+
+ return 0;
+}
+
+int misc_init_r(void)
+{
+ set_io_port_base(0);
+ return 0;
+}
diff --git a/board/qemu-mips/u-boot.lds b/board/qemu-mips/u-boot.lds
new file mode 100644
index 0000000..c2a8566
--- /dev/null
+++ b/board/qemu-mips/u-boot.lds
@@ -0,0 +1,72 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk Engineering, <wd@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
+ */
+
+/*
+OUTPUT_FORMAT("elf32-bigmips", "elf32-bigmips", "elf32-bigmips")
+*/
+OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", "elf32-tradbigmips")
+OUTPUT_ARCH(mips)
+ENTRY(_start)
+SECTIONS
+{
+ . = 0x00000000;
+
+ . = ALIGN(4);
+ .text :
+ {
+ *(.text)
+ }
+
+ . = ALIGN(4);
+ .rodata : { *(.rodata) }
+
+ . = ALIGN(4);
+ .data : { *(.data) }
+
+ . = .;
+ _gp = ALIGN(16) +0x7ff0;
+
+ .got : {
+ __got_start = .;
+ *(.got)
+ __got_end = .;
+ }
+
+ . = ALIGN(4);
+ .sdata : { *(.sdata) }
+
+ . = .;
+ .u_boot_cmd : {
+ __u_boot_cmd_start = .;
+ *(.u_boot_cmd)
+ __u_boot_cmd_end = .;
+ }
+
+ uboot_end_data = .;
+ num_got_entries = (__got_end - __got_start) >> 2;
+
+ . = ALIGN(4);
+ .sbss : { *(.sbss) }
+ .bss : { *(.bss) }
+ uboot_end = .;
+}