Setup the SAMA5D4-EK NSH configuration to use the DRAMBOOT loader by default
This commit is contained in:
Gregory Nutt
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2be17d64b3
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654fd5ff2d
@ -378,9 +378,11 @@ Creating and Using DRAMBOOT
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mv nuttx.bin dramboot.bin
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4. Build the "real" DRAM configuration. This will create the nuttx.hex
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that you will load using dramboot.
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that you will load using dramboot. Note that you must select
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CONFIG_SAMA5D4EK_DRAM_BOOT=y. This controls the origin at which the
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code is linked and positions it correctly for the DRAMBOOT program.
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5. Restart the system holding DIS_BOOT. You should see the RamBOOT
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5. Restart the system holding DIS_BOOT. You should see the RomBOOT
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prompt on the 115200 8N1 serial console (and nothing) more. Hit
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the ENTER key with the focus on your terminal window a few time.
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This will enable JTAG.
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@ -2677,7 +2679,7 @@ SAMA4D4-EK Configuration Options
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CONFIG_RAM_START=0x20000000
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CONFIG_RAM_VSTART - The virutal start address of installed DRAM
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CONFIG_RAM_VSTART - The virtual start address of installed DRAM
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CONFIG_RAM_VSTART=0x20000000
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@ -2926,6 +2928,7 @@ Configurations
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Now for the gory details:
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dramboot:
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This is a little program to help debug of code in DRAM. It does the
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following:
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@ -3037,10 +3040,20 @@ Configurations
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3. This configuration executes out of SDRAM flash and is loaded into
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SDRAM from NAND, Serial DataFlash, SD card or from a TFTPC sever via
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U-Boot or BareBox. Data also is positioned in SDRAM.
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U-Boot, BareBox, or the DRAMBOOT configuration described above. Data
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also is positioned in SDRAM.
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I did most testing with nuttx.bin on an SD card. These are the
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commands that I used to boot NuttX from the SD card:
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The load address is different for the DRAMBOOT program and the Linux
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bootloaders. This can easily be reconfigured, however:
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CONFIG_SAMA5D4EK_DRAM_BOOT=y
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See the section above entitled "Creating and Using DRAMBOOT" above
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for more information.
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At times, have have tested with nuttx.bin on an SD card and booting
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with U-Boot. These are the commands that I used to boot NuttX from
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the SD card:
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U-Boot> fatload mmc 0 0x20008000 nuttx.bin
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U-Boot> go 0x20008040
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@ -3093,7 +3106,8 @@ Configurations
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STATUS:
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See the To-Do list below
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ramtest
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ramtest:
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This is a stripped down version of NSH that runs out of
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internal SRAM. It configures SDRAM and supports only the RAM test
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at apps/examples/ramtest. This configuration is useful for
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@ -42,7 +42,11 @@ ifeq ($(CONFIG_SAMA5_BOOT_ISRAM),y)
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endif
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ifeq ($(CONFIG_SAMA5_BOOT_SDRAM),y)
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LDSCRIPT = ddram.ld
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ifeq ($(CONFIG_SAMA5D4EK_DRAM_BOOT),y)
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LDSCRIPT = dramboot.ld
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else
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LDSCRIPT = uboot.ld
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endif
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endif
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ifeq ($(WINTOOL),y)
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@ -42,7 +42,11 @@ ifeq ($(CONFIG_SAMA5_BOOT_ISRAM),y)
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endif
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ifeq ($(CONFIG_SAMA5_BOOT_SDRAM),y)
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LDSCRIPT = ddram.ld
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ifeq ($(CONFIG_SAMA5D4EK_DRAM_BOOT),y)
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LDSCRIPT = dramboot.ld
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else
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LDSCRIPT = uboot.ld
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endif
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endif
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ifeq ($(WINTOOL),y)
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@ -307,6 +307,7 @@ CONFIG_NSH_MMCSDMINOR=0
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# CONFIG_SAMA5D4EK_384MHZ is not set
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CONFIG_SAMA5D4EK_396MHZ=y
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# CONFIG_SAMA5D4EK_528MHZ is not set
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CONFIG_SAMA5D4EK_DRAM_BOOT=y
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#
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# RTOS Features
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@ -42,7 +42,11 @@ ifeq ($(CONFIG_SAMA5_BOOT_ISRAM),y)
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endif
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ifeq ($(CONFIG_SAMA5_BOOT_SDRAM),y)
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LDSCRIPT = ddram.ld
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ifeq ($(CONFIG_SAMA5D4EK_DRAM_BOOT),y)
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LDSCRIPT = dramboot.ld
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else
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LDSCRIPT = uboot.ld
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endif
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endif
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ifeq ($(WINTOOL),y)
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123
configs/sama5d4-ek/scripts/dramboot.ld
Normal file
123
configs/sama5d4-ek/scripts/dramboot.ld
Normal file
@ -0,0 +1,123 @@
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/****************************************************************************
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* configs/sama5d4-ek/scripts/dramboot.ld
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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/* The SAMA5D4 has 128 KB of ISRAM beginning at virtual address 0x0020:0000.
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* This memory configuration, however, loads into the 256MB SDRAM on board
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* the SAMA5D4-EK which lies at 0x2000:0000.
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*
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* Vectors in low memory are assumed and 16KB of ISRAM is reserved at the
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* high end of ISRAM for the page table.
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*/
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MEMORY
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{
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isram (W!RX) : ORIGIN = 0x00200000, LENGTH = 128K - 16K
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sdram (W!RX) : ORIGIN = 0x20000000, LENGTH = 256M
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}
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OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
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OUTPUT_ARCH(arm)
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ENTRY(entry)
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ENTRY(_stext)
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SECTIONS
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{
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.text : {
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_stext = ABSOLUTE(.);
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*(.vectors)
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*(.text .text.*)
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*(.fixup)
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*(.gnu.warning)
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*(.rodata .rodata.*)
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*(.gnu.linkonce.t.*)
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*(.glue_7)
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*(.glue_7t)
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*(.got)
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*(.gcc_except_table)
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*(.gnu.linkonce.r.*)
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*(.ARM.extab*)
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*(.gnu.linkonce.armextab.*)
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_etext = ABSOLUTE(.);
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} > sdram
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.init_section : {
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_sinit = ABSOLUTE(.);
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*(.init_array .init_array.*)
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_einit = ABSOLUTE(.);
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} > sdram
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.ARM.extab : {
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*(.ARM.extab*)
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} > sdram
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/* .ARM.exidx is sorted, so has to go in its own output section. */
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PROVIDE_HIDDEN (__exidx_start = .);
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.ARM.exidx :
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{
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*(.ARM.exidx* .gnu.linkonce.armexidx.*)
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} > sdram
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PROVIDE_HIDDEN (__exidx_end = .);
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.data : {
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_sdata = ABSOLUTE(.);
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*(.data .data.*)
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*(.gnu.linkonce.d.*)
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CONSTRUCTORS
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_edata = ABSOLUTE(.);
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} > sdram
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.bss : {
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_sbss = ABSOLUTE(.);
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*(.bss .bss.*)
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*(.gnu.linkonce.b.*)
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*(COMMON)
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_ebss = ABSOLUTE(.);
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} > sdram
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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.stab.excl 0 : { *(.stab.excl) }
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.stab.exclstr 0 : { *(.stab.exclstr) }
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.stab.index 0 : { *(.stab.index) }
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.stab.indexstr 0 : { *(.stab.indexstr) }
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.comment 0 : { *(.comment) }
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.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_info 0 : { *(.debug_info) }
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.debug_line 0 : { *(.debug_line) }
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.debug_pubnames 0 : { *(.debug_pubnames) }
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.debug_aranges 0 : { *(.debug_aranges) }
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}
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@ -1,5 +1,5 @@
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/****************************************************************************
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* configs/sama5d4-ek/scripts/ddram.ld
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* configs/sama5d4-ek/scripts/uboot.ld
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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@ -36,7 +36,7 @@
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/* The SAMA5D4 has 128 KB of ISRAM beginning at virtual address 0x0020:0000.
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* This memory configuration, however, loads into the 256MB SDRAM on board
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* the SAMA5D4-EK which lies at 0x2000:0000. An offset 0x00008000 is
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* reserved by the bootloader.
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* reserved for used by the U-boot bootloader.
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*
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* Vectors in low memory are assumed and 16KB of ISRAM is reserved at the
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* high end of ISRAM for the page table.
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