[src/trunk]: src/sys/arch/hpcmips/stand/romboot simple boot loader for ROM

[shin <shin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/413a05f3bccd
branches:  trunk
changeset: 519651:413a05f3bccd
user:      shin <shin%NetBSD.org@localhost>
date:      Sun Dec 23 13:27:56 2001 +0000

description:
simple boot loader for ROM

supported platform: LASER5 L-Router(L-Board)

diffstat:

 sys/arch/hpcmips/stand/romboot/Makefile         |   19 +++
 sys/arch/hpcmips/stand/romboot/romboot.S        |  121 ++++++++++++++++++++++++
 sys/arch/hpcmips/stand/romboot/romboot.ldscript |   11 ++
 3 files changed, 151 insertions(+), 0 deletions(-)

diffs (163 lines):

diff -r 0952397d0067 -r 413a05f3bccd sys/arch/hpcmips/stand/romboot/Makefile
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/hpcmips/stand/romboot/Makefile   Sun Dec 23 13:27:56 2001 +0000
@@ -0,0 +1,19 @@
+#      $NetBSD: Makefile,v 1.1 2001/12/23 13:27:56 shin Exp $
+
+CC?=           ${CROSSDIR}cc
+AS?=           ${CROSSDIR}as
+LD?=           ${CROSSDIR}ld
+OBJCOPY?=      ${CROSSDIR}objcopy
+
+AFLAGS+=       -x assembler-with-cpp -traditional-cpp
+
+all: romboot.bin
+
+clean:
+       rm -f romboot.bin romboot romboot.o
+
+romboot: romboot.o
+       $(LD) -o $@ -N -T romboot.ldscript -Ttext 0 -e _start $?
+
+romboot.bin: romboot
+       $(OBJCOPY) --remove-section=.reginfo -O binary $? $@
diff -r 0952397d0067 -r 413a05f3bccd sys/arch/hpcmips/stand/romboot/romboot.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/hpcmips/stand/romboot/romboot.S  Sun Dec 23 13:27:56 2001 +0000
@@ -0,0 +1,121 @@
+/*     $NetBSD*        */
+
+/*-
+ * Copyright (c) 2001 Takao Shinohara.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * simple boot loader for ROM
+ *
+ * supported platform: LASER5 L-Router(L-Board)
+ */    
+       
+#define zero   $0
+#define AT     $at
+#define v0     $2
+#define v1     $3
+#define a0     $4
+#define a1     $5
+#define a2     $6
+#define a3     $7
+#define t0     $8
+#define t1     $9
+#define t2     $10
+#define t3     $11
+#define t4     $12
+#define t5     $13
+#define t6     $14
+#define t7     $15
+#define s0     $16
+#define s1     $17
+#define s2     $18
+#define s3     $19
+#define s4     $20
+#define s5     $21
+#define s6     $22
+#define s7     $23
+#define t8     $24
+#define t9     $25
+#define k0     $26
+#define k1     $27
+#define gp     $28
+#define sp     $29
+#define s8     $30
+#define ra     $31
+
+#define MIPS_KSEG1_START       0xa0000000
+#define KERNEL_LOADADDR                0x80030000
+
+       .text
+       .set    noreorder
+       .globl  _start
+_start:
+       bal     1f                      # ra = ROM address + 8
+       nop
+1:     subu    a0, ra, 8               # a0 = ROM address
+       move    s0, a0                  # keep it in s0 
+       la      t0, _etext
+       la      t1, _ftext
+       subu    t0, t1                  # t0 = size of boot loader
+       addu    a0, t0                  # a0 = kernel address in ROM
+       li      a1, KERNEL_LOADADDR
+       li      t2, (1024*1024*3)       # max kernel size = 3MB - boot
+       subu    t2, t0
+       addu    t2, a1                  # kernel end address
+       or      a1, MIPS_KSEG1_START    # convert to kseg1 addr
+       or      t2, MIPS_KSEG1_START    # convert to kseg1 addr
+2:
+       lw      v0, 0(a0)
+       sw      v0, 0(a1)
+       addu    a0, 4
+       bltu    a1, t2, 2b
+       addu    a1, 4                   # BDSLOT
+
+       li      a0, 1                   # argc = 1
+       addu    a1, sp, -16             # argv
+       la      t0, argv0
+       addu    t0, s0
+       sw      t0, 0(a1)               # argv[0] = "netbsd"
+       sw      zero, 4(a1)             # argv[1] = NULL
+       la      a2, bootinfo
+       addu    a2, s0
+       move    a3, zero
+       li      t9, KERNEL_LOADADDR
+       jr      t9
+       nop
+
+argv0: .asciiz "netbsd"
+
+bootinfo:
+       .word   34              # len
+       .word   0x13536135      # magic
+       .word   0               # fb_addr
+       .word   0, 0            # fb_line_bytes, fb_width, fb_height, fb_type
+       .word   2               # BI_CNUSE_SERIAL
+       .word   0x04104500      # VR4122
+       .word   0x03810200      # LASER5 L-BOARD
+/*
+ * kernel binary image begins here.
+ */
diff -r 0952397d0067 -r 413a05f3bccd sys/arch/hpcmips/stand/romboot/romboot.ldscript
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/hpcmips/stand/romboot/romboot.ldscript   Sun Dec 23 13:27:56 2001 +0000
@@ -0,0 +1,11 @@
+OUTPUT_ARCH(mips)
+ENTRY(_start)
+SECTIONS
+{
+  .text      :
+  {
+    _ftext = . ;
+    *(.text)
+   _etext = .;
+  }
+}