[MIPS] Add back support for LASAT platforms

Signed-off-by: Brian Murphy <brian@murphy.dk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 108 insertions, 0 deletions

diff --git a/arch/mips/lasat/image/Makefile b/arch/mips/lasat/image/Makefile
new file mode 100644
index 000000000000..5332449ec040
--- /dev/null
+++ b/arch/mips/lasat/image/Makefile
@@ -0,0 +1,54 @@
+#
+# MAKEFILE FOR THE MIPS LINUX BOOTLOADER AND ROM DEBUGGER
+#
+# i-data Networks
+#
+# Author: Thomas Horsten <thh@i-data.com>
+#
+
+ifndef Version
+ Version = "$(USER)-test"
+endif
+
+MKLASATIMG = mklasatimg
+MKLASATIMG_ARCH = mq2,mqpro,sp100,sp200
+KERNEL_IMAGE = $(TOPDIR)/vmlinux
+KERNEL_START = $(shell $(NM) $(KERNEL_IMAGE) | grep " _text" | cut -f1 -d\ )
+KERNEL_ENTRY = $(shell $(NM) $(KERNEL_IMAGE) | grep kernel_entry | cut -f1 -d\ )
+
+LDSCRIPT= -L$(obj) -Tromscript.normal
+
+HEAD_DEFINES := -D_kernel_start=0x$(KERNEL_START) \
+                -D_kernel_entry=0x$(KERNEL_ENTRY) \
+                -D VERSION="\"$(Version)\"" \
+                -D TIMESTAMP=$(shell date +%s)
+
+$(obj)/head.o: $(obj)/head.S $(KERNEL_IMAGE)
+        $(CC) -fno-pic $(HEAD_DEFINES) -I$(TOPDIR)/include -c -o $@ $<
+
+OBJECTS = head.o kImage.o
+
+rom.sw: $(obj)/rom.sw
+rom.bin:        $(obj)/rom.bin
+
+$(obj)/rom.sw:  $(obj)/rom.bin
+        $(MKLASATIMG) -o $@ -k $^ -m $(MKLASATIMG_ARCH)
+
+$(obj)/rom.bin: $(obj)/rom
+        $(OBJCOPY) -O binary -S $^ $@
+
+# Rule to make the bootloader
+$(obj)/rom: $(addprefix $(obj)/,$(OBJECTS))
+        $(LD) $(LDFLAGS) $(LDSCRIPT) -o $@ $^
+
+$(obj)/%.o: $(obj)/%.gz
+        $(LD) -r -o $@ -b binary $<
+
+$(obj)/%.gz: $(obj)/%.bin
+        gzip -cf -9 $< > $@
+
+$(obj)/kImage.bin: $(KERNEL_IMAGE)
+        $(OBJCOPY) -O binary -S $^ $@
+
+clean:
+        rm -f rom rom.bin rom.sw kImage.bin kImage.o
diff --git a/arch/mips/lasat/image/head.S b/arch/mips/lasat/image/head.S
new file mode 100644
index 000000000000..efb95f2609c2
--- /dev/null
+++ b/arch/mips/lasat/image/head.S
@@ -0,0 +1,31 @@
+#include <asm/lasat/head.h>
+
+        .text
+        .section .text.start, "ax"
+        .set noreorder
+        .set mips3
+
+        /* Magic words identifying a software image */
+        .word   LASAT_K_MAGIC0_VAL
+        .word   LASAT_K_MAGIC1_VAL
+
+        /* Image header version */
+        .word   0x00000002
+
+        /* image start and size */
+        .word   _image_start
+        .word   _image_size
+
+        /* start of kernel and entrypoint in uncompressed image */
+        .word   _kernel_start
+        .word   _kernel_entry
+
+        /* Here we have room for future flags */
+
+        .org    0x40
+reldate:
+        .word   TIMESTAMP
+
+        .org    0x50
+release:
+        .string VERSION
diff --git a/arch/mips/lasat/image/romscript.normal b/arch/mips/lasat/image/romscript.normal
new file mode 100644
index 000000000000..988f8ad189cb
--- /dev/null
+++ b/arch/mips/lasat/image/romscript.normal
@@ -0,0 +1,23 @@
+OUTPUT_ARCH(mips)
+
+SECTIONS
+{
+  .text :
+  {
+    *(.text.start)
+  }
+
+  /* Data in ROM */
+
+  .data ALIGN(0x10) :
+  {
+    *(.data)
+  }
+  _image_start = ADDR(.data);
+  _image_size = SIZEOF(.data);
+
+  .other :
+  {
+    *(.*)
+  }
+}