From: Sebastien Bourdeauducq <sebastien@milkymist.org>
Date: Thu, 11 Jul 2013 16:36:26 +0000 (+0200)
Subject: software: share crt0
X-Git-Tag: 24jan2021_ls180~2875
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=25506c1ab5194dcbe8048ccda6f7c1f29118a65f;p=litex.git

software: share crt0
---

diff --git a/software/bios/Makefile b/software/bios/Makefile
index 973fb3ab..9a7ef979 100644
--- a/software/bios/Makefile
+++ b/software/bios/Makefile
@@ -1,7 +1,7 @@
 M2DIR=../..
 include $(M2DIR)/software/common.mak
 
-OBJECTS=crt0.o isr.o sdram.o main.o boot-helper.o boot.o dataflow.o
+OBJECTS=isr.o sdram.o main.o boot-helper.o boot.o dataflow.o
 
 all: bios.bin
 
@@ -17,7 +17,9 @@ all: bios.bin
 bios.elf: linker.ld $(OBJECTS) libs
 
 %.elf:
-	$(LD) $(LDFLAGS) -T $< -N -o $@ $(OBJECTS) \
+	$(LD) $(LDFLAGS) -T $< -N -o $@ \
+		$(M2DIR)/software/libbase/crt0.o \
+		$(OBJECTS) \
 		-L$(M2DIR)/software/libnet \
 		-L$(M2DIR)/software/libbase \
 		-L$(M2DIR)/software/libcompiler-rt \
diff --git a/software/bios/crt0.S b/software/bios/crt0.S
deleted file mode 100644
index 62797209..00000000
--- a/software/bios/crt0.S
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * LatticeMico32 C startup code.
- *
- * 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 AUTHOR 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 AUTHOR 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.
- */
-
-/* Exception handlers - Must be 32 bytes long. */
-.section    .text, "ax", @progbits
-.global     _start
-_start:
-_reset_handler:
-	xor	r0, r0, r0
-	wcsr	IE, r0
-	mvhi	r1, hi(_reset_handler)
-	ori	r1, r1, lo(_reset_handler)
-	wcsr	EBA, r1
-	bi	_crt0
-	nop
-	nop
-
-_breakpoint_handler:
-	bi _breakpoint_handler
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_instruction_bus_error_handler:
-	bi _instruction_bus_error_handler
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_watchpoint_hander:
-	bi _watchpoint_hander
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_data_bus_error_handler:
-	bi _data_bus_error_handler
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_divide_by_zero_handler:
-	bi _divide_by_zero_handler
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_interrupt_handler:
-	sw      (sp+0), ra
-	calli   .save_all
-	calli   isr
-	bi      .restore_all_and_eret
-	nop
-	nop
-	nop
-	nop
-
-macaddress:
-	.byte 0x10
-	.byte 0xe2
-	.byte 0xd5
-	.byte 0x00
-	.byte 0x00
-	.byte 0x00
-
-	/* padding to align to a 32-bit boundary */
-	.byte 0x00
-	.byte 0x00
-
-_crt0:
-	/* Setup stack and global pointer */
-	mvhi    sp, hi(_fstack)
-	ori     sp, sp, lo(_fstack)
-	mvhi    gp, hi(_gp)
-	ori     gp, gp, lo(_gp)
-
-	/* Clear BSS */
-	mvhi    r1, hi(_fbss)
-	ori     r1, r1, lo(_fbss)
-	mvhi    r3, hi(_ebss)
-	ori     r3, r3, lo(_ebss)
-.clearBSS:
-	be      r1, r3, .callMain
-	sw      (r1+0), r0
-	addi    r1, r1, 4
-	bi      .clearBSS
-
-.callMain:
-	bi      main
-
-.save_all:
-	addi    sp, sp, -56
-	sw      (sp+4), r1
-	sw      (sp+8), r2
-	sw      (sp+12), r3
-	sw      (sp+16), r4
-	sw      (sp+20), r5
-	sw      (sp+24), r6
-	sw      (sp+28), r7
-	sw      (sp+32), r8
-	sw      (sp+36), r9
-	sw      (sp+40), r10
-	sw      (sp+48), ea
-	sw      (sp+52), ba
-	/* ra needs to be moved from initial stack location */
-	lw      r1, (sp+56)
-	sw      (sp+44), r1
-	ret
-
-.restore_all_and_eret:
-	lw      r1, (sp+4)
-	lw      r2, (sp+8)
-	lw      r3, (sp+12)
-	lw      r4, (sp+16)
-	lw      r5, (sp+20)
-	lw      r6, (sp+24)
-	lw      r7, (sp+28)
-	lw      r8, (sp+32)
-	lw      r9, (sp+36)
-	lw      r10, (sp+40)
-	lw      ra, (sp+44)
-	lw      ea, (sp+48)
-	lw      ba, (sp+52)
-	addi    sp, sp, 56
-	eret
diff --git a/software/libbase/Makefile b/software/libbase/Makefile
index 11e944d0..e58da5ce 100644
--- a/software/libbase/Makefile
+++ b/software/libbase/Makefile
@@ -3,7 +3,7 @@ include $(M2DIR)/software/common.mak
 
 OBJECTS=setjmp.o libc.o errno.o crc16.o crc32.o console.o system.o id.o uart.o qsort.o strtod.o
 
-all: libbase.a libbase-nofloat.a
+all: crt0.o libbase.a libbase-nofloat.a
 
 # pull in dependency info for *existing* .o files
 -include $(OBJECTS:.o=.d)
diff --git a/software/libbase/crt0.S b/software/libbase/crt0.S
new file mode 100644
index 00000000..62797209
--- /dev/null
+++ b/software/libbase/crt0.S
@@ -0,0 +1,167 @@
+/*
+ * LatticeMico32 C startup code.
+ *
+ * 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 AUTHOR 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 AUTHOR 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.
+ */
+
+/* Exception handlers - Must be 32 bytes long. */
+.section    .text, "ax", @progbits
+.global     _start
+_start:
+_reset_handler:
+	xor	r0, r0, r0
+	wcsr	IE, r0
+	mvhi	r1, hi(_reset_handler)
+	ori	r1, r1, lo(_reset_handler)
+	wcsr	EBA, r1
+	bi	_crt0
+	nop
+	nop
+
+_breakpoint_handler:
+	bi _breakpoint_handler
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+
+_instruction_bus_error_handler:
+	bi _instruction_bus_error_handler
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+
+_watchpoint_hander:
+	bi _watchpoint_hander
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+
+_data_bus_error_handler:
+	bi _data_bus_error_handler
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+
+_divide_by_zero_handler:
+	bi _divide_by_zero_handler
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+
+_interrupt_handler:
+	sw      (sp+0), ra
+	calli   .save_all
+	calli   isr
+	bi      .restore_all_and_eret
+	nop
+	nop
+	nop
+	nop
+
+macaddress:
+	.byte 0x10
+	.byte 0xe2
+	.byte 0xd5
+	.byte 0x00
+	.byte 0x00
+	.byte 0x00
+
+	/* padding to align to a 32-bit boundary */
+	.byte 0x00
+	.byte 0x00
+
+_crt0:
+	/* Setup stack and global pointer */
+	mvhi    sp, hi(_fstack)
+	ori     sp, sp, lo(_fstack)
+	mvhi    gp, hi(_gp)
+	ori     gp, gp, lo(_gp)
+
+	/* Clear BSS */
+	mvhi    r1, hi(_fbss)
+	ori     r1, r1, lo(_fbss)
+	mvhi    r3, hi(_ebss)
+	ori     r3, r3, lo(_ebss)
+.clearBSS:
+	be      r1, r3, .callMain
+	sw      (r1+0), r0
+	addi    r1, r1, 4
+	bi      .clearBSS
+
+.callMain:
+	bi      main
+
+.save_all:
+	addi    sp, sp, -56
+	sw      (sp+4), r1
+	sw      (sp+8), r2
+	sw      (sp+12), r3
+	sw      (sp+16), r4
+	sw      (sp+20), r5
+	sw      (sp+24), r6
+	sw      (sp+28), r7
+	sw      (sp+32), r8
+	sw      (sp+36), r9
+	sw      (sp+40), r10
+	sw      (sp+48), ea
+	sw      (sp+52), ba
+	/* ra needs to be moved from initial stack location */
+	lw      r1, (sp+56)
+	sw      (sp+44), r1
+	ret
+
+.restore_all_and_eret:
+	lw      r1, (sp+4)
+	lw      r2, (sp+8)
+	lw      r3, (sp+12)
+	lw      r4, (sp+16)
+	lw      r5, (sp+20)
+	lw      r6, (sp+24)
+	lw      r7, (sp+28)
+	lw      r8, (sp+32)
+	lw      r9, (sp+36)
+	lw      r10, (sp+40)
+	lw      ra, (sp+44)
+	lw      ea, (sp+48)
+	lw      ba, (sp+52)
+	addi    sp, sp, 56
+	eret
diff --git a/software/videomixer/Makefile b/software/videomixer/Makefile
index 4e97ceb6..b4e6c183 100644
--- a/software/videomixer/Makefile
+++ b/software/videomixer/Makefile
@@ -1,7 +1,7 @@
 M2DIR=../..
 include $(M2DIR)/software/common.mak
 
-OBJECTS=crt0.o isr.o time.o fb.o dvisampler0.o dvisampler1.o main.o
+OBJECTS=isr.o time.o fb.o dvisampler0.o dvisampler1.o main.o
 
 all: videomixer.bin videomixer.fbi
 
@@ -18,7 +18,9 @@ all: videomixer.bin videomixer.fbi
 videomixer.elf: linker.ld $(OBJECTS) libs
 
 %.elf:
-	$(LD) $(LDFLAGS) -T $< -N -o $@ $(OBJECTS) \
+	$(LD) $(LDFLAGS) -T $< -N -o $@ \
+		$(M2DIR)/software/libbase/crt0.o \
+		$(OBJECTS) \
 		-L$(M2DIR)/software/libbase \
 		-L$(M2DIR)/software/libcompiler-rt \
 		-lbase -lcompiler-rt
diff --git a/software/videomixer/crt0.S b/software/videomixer/crt0.S
deleted file mode 100644
index 62797209..00000000
--- a/software/videomixer/crt0.S
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * LatticeMico32 C startup code.
- *
- * 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 AUTHOR 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 AUTHOR 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.
- */
-
-/* Exception handlers - Must be 32 bytes long. */
-.section    .text, "ax", @progbits
-.global     _start
-_start:
-_reset_handler:
-	xor	r0, r0, r0
-	wcsr	IE, r0
-	mvhi	r1, hi(_reset_handler)
-	ori	r1, r1, lo(_reset_handler)
-	wcsr	EBA, r1
-	bi	_crt0
-	nop
-	nop
-
-_breakpoint_handler:
-	bi _breakpoint_handler
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_instruction_bus_error_handler:
-	bi _instruction_bus_error_handler
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_watchpoint_hander:
-	bi _watchpoint_hander
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_data_bus_error_handler:
-	bi _data_bus_error_handler
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_divide_by_zero_handler:
-	bi _divide_by_zero_handler
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-	nop
-
-_interrupt_handler:
-	sw      (sp+0), ra
-	calli   .save_all
-	calli   isr
-	bi      .restore_all_and_eret
-	nop
-	nop
-	nop
-	nop
-
-macaddress:
-	.byte 0x10
-	.byte 0xe2
-	.byte 0xd5
-	.byte 0x00
-	.byte 0x00
-	.byte 0x00
-
-	/* padding to align to a 32-bit boundary */
-	.byte 0x00
-	.byte 0x00
-
-_crt0:
-	/* Setup stack and global pointer */
-	mvhi    sp, hi(_fstack)
-	ori     sp, sp, lo(_fstack)
-	mvhi    gp, hi(_gp)
-	ori     gp, gp, lo(_gp)
-
-	/* Clear BSS */
-	mvhi    r1, hi(_fbss)
-	ori     r1, r1, lo(_fbss)
-	mvhi    r3, hi(_ebss)
-	ori     r3, r3, lo(_ebss)
-.clearBSS:
-	be      r1, r3, .callMain
-	sw      (r1+0), r0
-	addi    r1, r1, 4
-	bi      .clearBSS
-
-.callMain:
-	bi      main
-
-.save_all:
-	addi    sp, sp, -56
-	sw      (sp+4), r1
-	sw      (sp+8), r2
-	sw      (sp+12), r3
-	sw      (sp+16), r4
-	sw      (sp+20), r5
-	sw      (sp+24), r6
-	sw      (sp+28), r7
-	sw      (sp+32), r8
-	sw      (sp+36), r9
-	sw      (sp+40), r10
-	sw      (sp+48), ea
-	sw      (sp+52), ba
-	/* ra needs to be moved from initial stack location */
-	lw      r1, (sp+56)
-	sw      (sp+44), r1
-	ret
-
-.restore_all_and_eret:
-	lw      r1, (sp+4)
-	lw      r2, (sp+8)
-	lw      r3, (sp+12)
-	lw      r4, (sp+16)
-	lw      r5, (sp+20)
-	lw      r6, (sp+24)
-	lw      r7, (sp+28)
-	lw      r8, (sp+32)
-	lw      r9, (sp+36)
-	lw      r10, (sp+40)
-	lw      ra, (sp+44)
-	lw      ea, (sp+48)
-	lw      ba, (sp+52)
-	addi    sp, sp, 56
-	eret