Add AVR32 start function
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2970 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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@ -43,16 +43,21 @@ endif
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ifeq ($(WINTOOL),y)
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NUTTX = "${shell cygpath -w $(TOPDIR)/nuttx}"
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CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
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INCLUDES = -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
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-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
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-I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}" \
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-I "${shell cygpath -w $(TOPDIR)/sched}"
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else
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NUTTX = $(TOPDIR)/nuttx
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CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common \
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INCLUDES = -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common \
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-I$(ARCH_SRCDIR)/$(ARCH_SUBDIR) -I$(TOPDIR)/sched
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endif
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CPPFLAGS += $(INCLUDES)
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CFLAGS += $(INCLUDES)
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CXXFLAGS += $(INCLUDES)
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AFLAGS += $(INCLUDES)
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HEAD_AOBJ = $(HEAD_ASRC:.S=$(OBJEXT))
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ASRCS = $(CHIP_ASRCS) $(CMN_ASRCS)
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@ -35,7 +35,7 @@
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# The start-up, "head", file
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HEAD_ASRC =
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HEAD_ASRC = up_nommuhead.S
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# Common AVR/AVR32 files
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180
arch/avr/src/avr32/up_nommuhead.S
Normal file
180
arch/avr/src/avr32/up_nommuhead.S
Normal file
@ -0,0 +1,180 @@
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/****************************************************************************
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* arch/avr32/src/arm/up_nommuhead.S
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <arch/avr32/avr32.h>
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#include "up_internal.h"
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#include "up_arch.h"
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/****************************************************************************
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* External Symbols
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****************************************************************************/
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.global _sbss /* Start of .bss. Defined by ld.script */
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.global _ebss /* End of .bss. Defined by ld.script */
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#ifdef CONFIG_BOOT_RUNFROMFLASH
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.global _sdata /* Start of .data section in RAM */
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.global _edata /* End of .data section in RAM */
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.global _erdonly /* Start of .data section in FLASH */
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#endif
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.global up_lowinit /* Perform low level initialization */
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.global up_boardinit /* Low-level board initialization */
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.global os_start /* NuttX entry point */
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.global vectors /* Vector base address */
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/****************************************************************************
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* Macros
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****************************************************************************/
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#ifdef CONFIG_DEBUG
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.macro showprogress, code
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.endm
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.macro doputc, code
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mov r12, \code
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mcall up_putc
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.endm
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#else
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.macro showprogress, code
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.endm
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.macro doputc, code
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.endm
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#endif
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/****************************************************************************
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* OS Entry Point
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****************************************************************************/
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/* The following entry point must be linked to execute at 0x80000000 if it
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* is to execute upon reset.
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*/
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.text
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.global __start
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.type __start, @function
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__start:
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/* Set the IDLE thread stack pointer. This stack will be used
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* through NuttX initialization and will, eventually, be inherited
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* by the IDLE thread when threading is enabled.
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*/
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lddpc r0, .Lstackbase
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ld.w sp, r0[0]
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/* Set up the vector base address so interrupts can be enabled. */
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lda.w r0, vectors
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mtsr AVR32_EVBA, r0
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/* Enable exception processing */
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csrf AVR32_SR_EM_SHIFT
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showprogress 'A'
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/* Clear system BSS section */
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lda.w r0, _sbss /* R =Start of .bss */
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lda.w r1, _ebss /* r1=End of .bss */
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mov r2, 0 /* Value to write to .bss */
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rjmp 2f /* Start at the bottom of the loop */
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1:
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st.d r0++, r2 /* Zero .bss */
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2:
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cp r0, r1 /* Finished? */
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brlo 1b /* No... keep looping */
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showprogress 'B'
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/* Copy system .data sections to new home in RAM. */
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#ifdef CONFIG_BOOT_RUNFROMFLASH
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lda.w r0, _sdata /* r0=Start of .data section in RAM */
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lda.w r1, _edata /* r1=End of .data section in RAM */
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lda.w r2, _erdonly /* r2=Start of .data in FLASH */
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rjmp 4f /* Start at the bottom of the loop */
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3:
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ld.d r4, r2++ /* Fetch the next data value */
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st.d r0++, r4 /* Write it to the .data section */
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4:
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cp r0, r1 /* Finished? */
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brlo 3b /* No... keep looping */
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showprogress 'C'
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#endif
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/* Clear the frame pointer and link register since this is the outermost
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* frame.
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*/
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mov r7, 0
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mov lr, 0
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/* Perform low-level initialization */
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mcall up_lowinit
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doputc 'D'
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/* Board specific early initialization */
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mcall up_ledinit
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/* Then jump to OS entry (will not return) */
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rjmp os_start
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.Lstackbase:
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.long _ebss+CONFIG_IDLETHREAD_STACKSIZE-4
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.size __start, .-__start
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/* This global variable is unsigned long g_heapbase and is
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* exported from here only because of its coupling to other
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* uses of _ebss in this file
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*/
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.data
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.align 4
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.globl g_heapbase
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.type g_heapbase, object
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g_heapbase:
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.long _ebss+CONFIG_IDLETHREAD_STACKSIZE
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.size g_heapbase, .-g_heapbase
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.end
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