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nes-proj/cpu/cc2538/cc2538.lds

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New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
/*
* Copyright (c) 2013, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* 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.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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.
*/
/*
* cc2538 linker configuration file. This is not the actual file used at link
* stage. Rather, it is used as input for the auto-generation of the actual
* ld script, which is called cc2538.ld and will be in the project directory
*/
#if (LPM_CONF_MAX_PM==2) && (LPM_CONF_ENABLE != 0)
cc2538: lpm: Give access to the SRAM non-retention area for PM2 If PM2 is enabled with LPM_CONF_MAX_PM, but not active, the non-retention area of the SRAM can be useful to place temporary data that does not fit in the low-leakage SRAM, typically after having called lpm_set_max_pm(LPM_PM1). Hence, give access to this non-retention area thanks to .nrdata* sections. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-11-25 14:43:37 +00:00
#define NRSRAM_START 0x20000000
#define NRSRAM_LEN 0x00004000
#define SRAM_START 0x20004000
#define SRAM_LEN 0x00004000
New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
#else
cc2538: lpm: Give access to the SRAM non-retention area for PM2 If PM2 is enabled with LPM_CONF_MAX_PM, but not active, the non-retention area of the SRAM can be useful to place temporary data that does not fit in the low-leakage SRAM, typically after having called lpm_set_max_pm(LPM_PM1). Hence, give access to this non-retention area thanks to .nrdata* sections. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-11-25 14:43:37 +00:00
#define SRAM_START 0x20000000
#define SRAM_LEN 0x00008000
New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
#endif
CC2538: Add FLASH_CONF_ORIGIN and FLASH_CONF_SIZE config parameters.
2014-05-02 15:35:58 +00:00
#ifdef FLASH_CONF_ORIGIN
#define FLASH_ORIGIN FLASH_CONF_ORIGIN
#else
#error FLASH_CONF_ORIGIN is not specified. Please define FLASH_CONF_ORIGIN in contiki-conf.h.
#endif
#ifdef FLASH_CONF_SIZE
#define FLASH_SIZE FLASH_CONF_SIZE
#else
#error FLASH_CONF_SIZE is not specified. Please define FLASH_CONF_SIZE in contiki-conf.h.
#endif
#define FLASH_CCA_LENGTH 44
#define FLASH_LENGTH (FLASH_SIZE - FLASH_CCA_LENGTH)
#define FLASH_CCA_ORIGIN (FLASH_ORIGIN + FLASH_LENGTH)
New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
MEMORY
{
CC2538: Add FLASH_CONF_ORIGIN and FLASH_CONF_SIZE config parameters.
2014-05-02 15:35:58 +00:00
FLASH (rx) : ORIGIN = FLASH_ORIGIN, LENGTH = FLASH_LENGTH
FLASH_CCA (RX) : ORIGIN = FLASH_CCA_ORIGIN, LENGTH = FLASH_CCA_LENGTH
cc2538: lpm: Give access to the SRAM non-retention area for PM2 If PM2 is enabled with LPM_CONF_MAX_PM, but not active, the non-retention area of the SRAM can be useful to place temporary data that does not fit in the low-leakage SRAM, typically after having called lpm_set_max_pm(LPM_PM1). Hence, give access to this non-retention area thanks to .nrdata* sections. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-11-25 14:43:37 +00:00
#if (LPM_CONF_MAX_PM==2) && (LPM_CONF_ENABLE != 0)
NRSRAM (RWX) : ORIGIN = NRSRAM_START, LENGTH = NRSRAM_LEN
#endif
New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
SRAM (RWX) : ORIGIN = SRAM_START, LENGTH = SRAM_LEN
}
SECTIONS
{
.text :
{
_text = .;
KEEP(*(.vectors))
*(.text*)
*(.rodata*)
_etext = .;
} > FLASH= 0
cc2538: Move SoC data to a dedicated section to save space Some SoC data requires huge alignments. E.g., the µDMA channel control table has to be 1024-byte aligned. This table was simply aligned to 1024 bytes in the C code, which had the following consequences, wasting a lot of RAM: - As this table could be placed anywhere in .bss, there could be an alignment gap of up to 1023 bytes between the preceding data and this table. - The size of this table was also aligned to 1024 bytes, regardless of UDMA_CONF_MAX_CHANNEL, making this configuration option supposed to save RAM just useless. - .bss was also aligned to at least 1024 bytes, creating a huge alignment gap between .data and .bss. Instead of relying on the compiler to force this alignment, and on the linker to automatically place data, this change places carefully such SoC data in RAM using the linker script. A dedicated section is created to place such SoC data requiring huge alignments, and it is put at the beginning of the SRAM in order to ensure a maximal alignment without any gap. In this way, the alignment of .bss also remains normal, and the size of this table is not constrained by its alignment, but only by its contents (i.e. by UDMA_CONF_MAX_CHANNEL). In the case of the µDMA channel control table, the data is still zeroed by udma_init() (instead of also being zeroed as part of .bss). Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-12-19 20:30:35 +00:00
.socdata (NOLOAD) :
{
*(.udma_channel_control_table)
} > SRAM
New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
.data :
{
_data = .;
*(.data*)
_edata = .;
} > SRAM AT > FLASH
cc2538: Fix .data LMA/VMA mismatch with some toolchains Some toolchains, like Sourcery CodeBench Lite 2013.05-23 arm-none-eabi (http://sourcery.mentor.com/public/gnu_toolchain/arm-none-eabi/) automatically force the alignment of an output section LMA to use the maximum alignment of all its input sections. This toolchain uses GNU binutils 2.23, and this automatic behavior is the same as the manual behavior of the ALIGN_WITH_INPUT feature of GNU binutils 2.24+. This behavior is not an issue per se, but it creates a gap between _etext and the LMA of the .data output section if _etext does not have the same alignment, while reset_handler() initialized this section by copying the data from _etext to its VMA, hence an offset in the addresses of loaded data, and missing data. This commit fixes this issue by making reset_handler() directly use the LMA of the .data section using LOADADDR(.data), rather than assuming that _etext is this LMA. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
2015-05-17 19:07:10 +00:00
_ldata = LOADADDR(.data);
New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
.ARM.exidx :
{
*(.ARM.exidx*)
} > FLASH
.bss :
{
_bss = .;
*(.bss*)
*(COMMON)
_ebss = .;
} > SRAM
cc2538: lpm: Give access to the SRAM non-retention area for PM2 If PM2 is enabled with LPM_CONF_MAX_PM, but not active, the non-retention area of the SRAM can be useful to place temporary data that does not fit in the low-leakage SRAM, typically after having called lpm_set_max_pm(LPM_PM1). Hence, give access to this non-retention area thanks to .nrdata* sections. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-11-25 14:43:37 +00:00
#if (LPM_CONF_MAX_PM==2) && (LPM_CONF_ENABLE != 0)
cc2538: Set the type of the .nrdata output section to NOLOAD The .nrdata section is volatile, so its initialization must be controlled by the application, and not be automatically done by the startup code. It should neither be zeroed like .bss, nor be initialized from data in flash memory like .data. This was already supposed to be the case, but the output section type of .nrdata was not set to NOLOAD, causing the generated ELF .nrdata section header to be of type PROGBITS instead of NOBITS, i.e. load data was generated to be programmed in RAM, thus producing huge unprogrammable .bin files. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-12-13 16:06:48 +00:00
.nrdata (NOLOAD) :
cc2538: lpm: Give access to the SRAM non-retention area for PM2 If PM2 is enabled with LPM_CONF_MAX_PM, but not active, the non-retention area of the SRAM can be useful to place temporary data that does not fit in the low-leakage SRAM, typically after having called lpm_set_max_pm(LPM_PM1). Hence, give access to this non-retention area thanks to .nrdata* sections. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-11-25 14:43:37 +00:00
{
_nrdata = .;
*(.nrdata*)
_enrdata = .;
} > NRSRAM
#endif
New Platform: TI CC2538 Development Kit This commit adds cpu, platform and example files, providing support for running Contiki on TI's cc2538 DK
2013-01-12 22:44:42 +00:00
.flashcca :
{
KEEP(*(.flashcca))
} > FLASH_CCA
}