nuttx/boards/z80/ez80/z20x/scripts/z20x_program.linkcmd
Gregory Nutt e814977c0f boards/z80/ez80/z20x/: Add W25 bootloader
The SD boot loader was not satisfactory because 1) the SD slot is on an optional board and, hence, cannot be part of a fundamental solution.  And 2) it is too big.

The only storage on borard is the Winbond W25 SPI-bsed FLASH.  This commit adds support for a bootload to 1) read code in HEX format from a serial port and write it to the W25 FLASH, or 2) read code in binary form from the W25 FLASH into SRAM and execute the loaded program.

boards/z80/ez80/z20x/configs:  Added w25boot configuration
boards/z80/ez80/z20x/src:  Add bootloader logic, w25_main.c.  Add logic to manage shared SRAM memory map so that the loaded program does not clobber the bootloader memory.  Add logic to recover the bootloader memory into the heap after the loaded program as started.
boards/z80/ez80/z20x/scripts:  Rework scripts and configuration to support a bootloader and program build.  The boolloader cannot use all of SRAM; the program must not clobber the SRAM region used by the bootloader.
2020-03-02 14:05:09 -03:00

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/*****************************************************************************/
/* boards/z80/ez80/z20x/scripts/z20x_program.linkcmd */
/* For configurations running entirely out of RAM with nothing in FLASH */
/* */
/* Licensed to the Apache Software Foundation (ASF) under one or more */
/* contributor license agreements. See the NOTICE file distributed with */
/* this work for additional information regarding copyright ownership. The */
/* ASF licenses this file to you under the Apache License, Version 2.0 (the */
/* "License"); you may not use this file except in compliance with the */
/* License. You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT */
/* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the */
/* License for the specific language governing permissions and limitations */
/* under the License. */
/* */
/*****************************************************************************/
-FORMAT=OMF695,INTEL32
-map -maxhexlen=64 -quiet -warnoverlap -xref -unresolved=fatal
-sort NAME=ascending -warn -debug -NOigcase
RANGE ROM $000000 : $01FFFF
RANGE RAM $050000 : $0BFFFF
RANGE EXTIO $000000 : $00FFFF
RANGE INTIO $000000 : $0000FF
CHANGE .RESET is RAM
CHANGE .STARTUP is RAM
CHANGE TEXT is CODE
CHANGE CODE is RAM
CHANGE STRSECT is CODE
ORDER .RESET,.IVECTS,.STARTUP,CODE,DATA
DEFINE __low_romdata = copy base of DATA
DEFINE __low_data = base of DATA
DEFINE __len_data = length of DATA
DEFINE __low_bss = base of BSS
DEFINE __len_bss = length of BSS
DEFINE __stack = highaddr of RAM + 1
DEFINE __heaptop = highaddr of RAM
DEFINE __heapbot = top of RAM + 1
DEFINE __low_romcode = copy base of CODE
DEFINE __low_code = base of CODE
DEFINE __len_code = length of CODE
DEFINE __copy_code_to_ram = 0
DEFINE __crtl = 1
DEFINE __vecstart = $040000
DEFINE __loaderstart = $040400
DEFINE __loaderend = $04ffff
DEFINE __progstart = $050000
DEFINE __progend = $0bffff
DEFINE __CS0_LBR_INIT_PARAM = $04
DEFINE __CS0_UBR_INIT_PARAM = $0b
DEFINE __CS0_CTL_INIT_PARAM = $08
DEFINE __CS0_BMC_INIT_PARAM = $00
DEFINE __CS1_LBR_INIT_PARAM = $00
DEFINE __CS1_UBR_INIT_PARAM = $00
DEFINE __CS1_CTL_INIT_PARAM = $00
DEFINE __CS1_BMC_INIT_PARAM = $00
DEFINE __CS2_LBR_INIT_PARAM = $00
DEFINE __CS2_UBR_INIT_PARAM = $00
DEFINE __CS2_CTL_INIT_PARAM = $00
DEFINE __CS2_BMC_INIT_PARAM = $00
DEFINE __CS3_LBR_INIT_PARAM = $00
DEFINE __CS3_UBR_INIT_PARAM = $00
DEFINE __CS3_CTL_INIT_PARAM = $00
DEFINE __CS3_BMC_INIT_PARAM = $00
DEFINE __RAM_CTL_INIT_PARAM = $80
DEFINE __RAM_ADDR_U_INIT_PARAM = $AF
DEFINE __FLASH_CTL_INIT_PARAM = $88
DEFINE __FLASH_ADDR_U_INIT_PARAM = $00
define _SYS_CLK_FREQ = 20000000
/* arch/z80/src/Makefile.zdsii will append target, object and library paths below */