From e255319c575709d6a12b7dd574a0c9f6868d8bf3 Mon Sep 17 00:00:00 2001
From: Jens Ahrensfeld <jens@jayfield.org>
Date: Sun, 22 Jan 2017 20:15:11 +0000
Subject: [PATCH] - added testbench for de-nano - added workaround for
 DCache_inv_all() for de-nano

git-svn-id: http://moon:8086/svn/mips@124 a8ebac50-d88d-4704-bea3-6648445a41b3
---
 src/Makefile        | 9 +++++++++
 src/libsys/Makefile | 4 ++--
 src/libsys/cop0.c   | 1 +
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/Makefile b/src/Makefile
index a5025fb..3207b6b 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -93,6 +93,15 @@ $(BUILD_DIR)/testbench.elf: $(BUILD_DIR) testbench.c
 	cat $@.srec | $(PACKHEX) > $@.pack
 	$(OBJCOPY) -O ihex -I binary $@.flash.bin $@.hex
 
+$(BUILD_DIR)/testbench_denano.elf: $(BUILD_DIR) testbench_denano.c 
+	$(CC) $(CFLAGS) -O3 -o $@ -DHZ=1000 -DNOSIGNAL -DBATCHMODE -DNOMAIN -Os -g testbench_denano.c paranoia.c delay_mips.c bogomips.c $(LIBS) >$@.map
+	$(OBJDUMP) -d $@ > $@.dis
+	$(OBJCOPY) $@ -O binary $@.bin
+	$(OBJCOPY) -O srec $@ $@.srec
+	$(FLASHGEN) $@.bin $(ENDIAN_FLAGS)
+	cat $@.srec | $(PACKHEX) > $@.pack
+	$(OBJCOPY) -O ihex -I binary $@.flash.bin $@.hex
+
 $(BUILD_DIR)/test_irq.elf: $(BUILD_DIR) test_irq.c
 	$(CC) $(CFLAGS) -o $@ test_irq.c $(LIBS) >$@.map
 	$(OBJDUMP) -d $@ > $@.dis
diff --git a/src/libsys/Makefile b/src/libsys/Makefile
index 316fc18..23e10fb 100644
--- a/src/libsys/Makefile
+++ b/src/libsys/Makefile
@@ -31,8 +31,8 @@ OBJDUMP=mips-elf-objdump
 OBJCOPY=mips-elf-objcopy
 FLASHGEN=flashgen
 
-OBJS-ml402=$(addprefix $(BUILD_DIR)/, libsys.o xcpt.o syscalls.o cop0.o irq.o mips_dbg.o mips_dis.o mips_ps2.o mips_gfx.o console.o screen.o uart.o board.o gpio.o)
-OBJS-denano=$(addprefix $(BUILD_DIR)/, libsys.o xcpt.o syscalls.o cop0.o irq.o mips_dbg.o mips_dis.o console.o uart.o board.o gdb_stub.o)
+OBJS-ml402=$(addprefix $(BUILD_DIR)/, libsys.o xcpt.o syscalls.o cop0.o irq.o mips_dbg.o mips_dis.o mips_ps2.o mips_gfx.o console.o screen.o uart.o board.o gpio.o gdb_stub.o)
+OBJS-denano=$(addprefix $(BUILD_DIR)/, libsys.o xcpt.o syscalls.o cop0.o irq.o mips_dbg.o mips_dis.o console.o uart.o board.o gpio.o gdb_stub.o)
 
 all: $(BUILD_DIR) $(BUILD_DIR)/libsys.a
 	
diff --git a/src/libsys/cop0.c b/src/libsys/cop0.c
index beca1ad..50c845b 100644
--- a/src/libsys/cop0.c
+++ b/src/libsys/cop0.c
@@ -144,6 +144,7 @@ void DCACHE_invalidate_at(uint32_t* pPtr)
 	(
 		"mtc0   %[pPtr], $31\n"
 		"cop0	35\n"
+		"nop"				// fix needed: don't work without nop on de-nano
 		:
 		: [pPtr] "r" (pPtr)
 	);