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Add support for .data and .bss in SDRAM

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This commit is contained in:
Gregory Nutt 2014-01-28 14:35:03 -06:00
parent 65382b9085
commit 79ea83d421
3 changed files with 208 additions and 37 deletions
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111
configs/sama5d3x-ek/README.txt
View File

@ -1284,8 +1284,8 @@ NOR FLASH Support
SDRAM Support
=============
Configuration
-------------
SRAM Heap Configuration
-----------------------
In these configurations, .data and .bss are retained in ISRAM. SDRAM can
be initialized and included in the heap. Relevant configuration settings:
@ -1350,6 +1350,40 @@ SDRAM Support
RAMTest: Pattern test: 20000000 268435456 33333333 cccccccc
RAMTest: Address-in-address test: 20000000 268435456
SDRAM Data Configuration
------------------------
In these configurations, .data and .bss are retained in ISRAM by default.
.data and .bss can also be retained in SDRAM using these slightly
different configuration settings. In this configuration, ISRAM is
used only for the Cortex-A5 page table for the IDLE thread stack.
System Type->ATSAMA5 Peripheral Support
CONFIG_SAMA5_MPDDRC=y : Enable the DDR controller
System Type->External Memory Configuration
CONFIG_SAMA5_DDRCS=y : Tell the system that DRAM is at the DDR CS
CONFIG_SAMA5_DDRCS_SIZE=268435456 : 2Gb DRAM -> 256GB
CONFIG_SAMA5_DDRCS_LPDDR2=y : Its DDR2
CONFIG_SAMA5_MT47H128M16RT=y : This is the type of DDR2
System Type->Heap Configuration
CONFIG_SAMA5_ISRAM_HEAP=n : These do not apply in this case
CONFIG_SAMA5_DCRS_HEAP=n
System Type->Boot Memory Configuration
CONFIG_RAM_START=0x20000000 : Physical address of SDRAM
CONFIG_RAM_VSTART=0x20000000 : Virtual address of SDRAM
CONFIG_RAM_SIZE=268435456 : Size of SDRAM
CONFIG_BOOT_SDRAM_DATA=y : Data is in SDRAM
Care must be used applied these RAM locations; the graphics
configurations use SDRAM in an incompatible way to set aside
LCD framebuffers.
Memory Management
CONFIG_MM_REGIONS=1 : One heap memory region: ISDRAM
NAND Support
============
@ -2676,38 +2710,41 @@ Configurations
be loaded via SAM-BA. The are the relevant configuration options
are provided above in the section entitled "NOR FLASH Support".
4. Data resides in ISRAM, but can be moved to SDRAM as described above
under "SDRAM Data Configuration."
The following features are pre-enabled in the demo configuration, but not
in the nsh configuration:
4. SDRAM is supported. .data and .bss is still retained in ISRAM, but
5. SDRAM is supported. .data and .bss is still retained in ISRAM, but
SDRAM is initializeed and the SDRAM memory is included in the heap.
Relevant configuration settings are provided in the paragraph entitled
"SDRAM Support" above.
5. The Real Time Clock/Calendar RTC) is enabled. See the sectino entitled
6. The Real Time Clock/Calendar RTC) is enabled. See the sectino entitled
"RTC" above.
6. The Embest or Ronetix CPU module includes an Atmel AT25DF321A,
7. The Embest or Ronetix CPU module includes an Atmel AT25DF321A,
32-megabit, 2.7-volt SPI serial flash. Support for that serial
FLASH can is enabled in this configuration. See the paragraph
entitle "AT25 Serial FLASH" for detailed configuration settings.
7. Support for HSMCI car slots. The SAMA5D3x-EK provides a two SD memory
8. Support for HSMCI car slots. The SAMA5D3x-EK provides a two SD memory
card slots: (1) a full size SD card slot (J7 labelled MCI0), and (2)
a microSD memory card slot (J6 labelled MCI1). The full size SD card
slot connects via HSMCI0; the microSD connects vi HSMCI1. Relevant
configuration settings can be found in the section entitle "HSMCI
Card Slots" above.
8. Support the USB high-speed device (UDPHS) driver is enabled. See the
9. Support the USB high-speed device (UDPHS) driver is enabled. See the
section above entitled "USB High-Speed Device" for relevant NuttX
configuration settings.
9. The USB high-speed EHCI and the low-/full- OHCI host drivers are supported
in this configuration. See the section above entitle "USB High-Speed Host"
for relevant configuration information.
10. The USB high-speed EHCI and the low-/full- OHCI host drivers are supported
in this configuration. See the section above entitle "USB High-Speed Host"
for relevant configuration information.
10. Support SAMA5D3 TRNG peripheral is enabled so that it provides
11. Support SAMA5D3 TRNG peripheral is enabled so that it provides
/dev/random. See the section entitled "TRNG and /dev/random"
above for detailed configuration information.
@ -2812,63 +2849,66 @@ Configurations
4. This configuration has support for NSH built-in applications enabled.
However, no built-in applications are selected in the base configuration.
5. This configuration has support for the FAT file system built in. However,
5. Data resides in ISRAM, but can be moved to SDRAM as described above
under "SDRAM Data Configuration."
6. This configuration has support for the FAT file system built in. However,
by default, there are no block drivers initialized. The FAT file system can
still be used to create RAM disks.
6. SDRAM support can be enabled by modifying your NuttX configuration as
7. SDRAM support can be enabled by modifying your NuttX configuration as
described above in the paragraph entitle "SDRAM Support"
7. The Embest or Ronetix CPU module includes an Atmel AT25DF321A,
8. The Embest or Ronetix CPU module includes an Atmel AT25DF321A,
32-megabit, 2.7-volt SPI serial flash. Support for that serial
FLASH can be enabled by modifying the NuttX configuration as
described above in the paragraph entitled "AT25 Serial FLASH".
8. Enabling HSMCI support. The SAMA5D3x-EK provides a two SD memory card
9. Enabling HSMCI support. The SAMA5D3x-EK provides a two SD memory card
slots: (1) a full size SD card slot (J7 labeled MCI0), and (2) a
microSD memory card slot (J6 labeled MCI1). The full size SD card
slot connects via HSMCI0; the microSD connects vi HSMCI1. Support
for both SD slots can be enabled with the settings provided in the
paragraph entitled "HSMCI Card Slots" above.
9. Support the USB low-, high- and full-speed OHCI host driver can be enabled
by changing the NuttX configuration file as described in the section
entitled "USB High-Speed Host" above.
10. Support the USB low-, high- and full-speed OHCI host driver can be enabled
by changing the NuttX configuration file as described in the section
entitled "USB High-Speed Host" above.
10. Support the USB high-speed USB device driver (UDPHS) can be enabled
11. Support the USB high-speed USB device driver (UDPHS) can be enabled
by changing the NuttX configuration file as described above in the
section entitled "USB High-Speed Device."
11. AT24 Serial EEPROM. A AT24C512 Serial EEPPROM was used for tested
12. AT24 Serial EEPROM. A AT24C512 Serial EEPPROM was used for tested
I2C. There is, however, no AT24 EEPROM on board the SAMA5D3x-EK:
The serial EEPROM was mounted on an external adaptor board and
connected to the SAMA5D3x-EK thusly. See the section above entitle
"AT24 Serial EEPROM" for further information.
12. I2C Tool. NuttX supports an I2C tool at apps/system/i2c that can be
13. I2C Tool. NuttX supports an I2C tool at apps/system/i2c that can be
used to peek and poke I2C devices. See the discussion above under
"I2C Tool" for detailed configuration settings.
13. Networking support via the can be added to NSH by modifying the
14. Networking support via the can be added to NSH by modifying the
configuration. See the "Networking" section above for detailed
configuration settings.
14. You can enable the touchscreen and a touchscreen by following the
15. You can enable the touchscreen and a touchscreen by following the
configuration instrcutions in the section entitled "Touchscreen
Testing" above.
15. The Real Time Clock/Calendar RTC) may be enabled by reconfiguring NuttX.
16. The Real Time Clock/Calendar RTC) may be enabled by reconfiguring NuttX.
See the section entitled "RTC" above for detailed configuration settings.
16. This example can be configured to exercise the watchdog timer test
17. This example can be configured to exercise the watchdog timer test
(apps/examples/watchdog). See the detailed configuration settings in
the section entitled "Watchdog Timer" above.
17. This example can be configured to enable the SAMA5 TRNG peripheral so
18. This example can be configured to enable the SAMA5 TRNG peripheral so
that it provides /dev/random. See the section entitled "TRNG and
/dev/random" above for detailed configuration information.
18. See also the sections above for additional configuration options:
19. See also the sections above for additional configuration options:
"AT24 Serial EEPROM", "CAN Usage", "SAMA5 ADC Support", "SAMA5 PWM
Support", "OV2640 Camera Interface", "I2S Audio Support"
@ -3047,6 +3087,9 @@ Configurations
NOTE: In order to boot in this configuration, you need to close the
BMS jumper.
4. Data resides in ISRAM, but can be moved to SDRAM as described above
under "SDRAM Data Configuration."
STATUS:
See the To-Do list below
@ -3069,18 +3112,14 @@ To-Do List
have been using the norboot configuration to start the program in NOR
FLASH (see just above). See "Creating and Using NORBOOT" above.
3) Currently, these configurations keep all .bss and .data in internal SRAM.
The SDRAM is available for heap, but not for static data. This is
because the SDRAM does not get configured until after the system has
booted; until after .bss and .data have been initialized. To change
this, the solution would be to port the Bareboard assembly language
setup into the NuttX assembly language startup and execute it BEFORE
initializing .bss and .data.
4) Neither USB OHCI nor EHCI support Isochronous endpoints. Interrupt
3) Neither USB OHCI nor EHCI support Isochronous endpoints. Interrupt
endpoint support in the EHCI driver is untested (but works in similar
EHCI drivers).
4) The logic in "SDRAM Data Configuration" has generated some crashes.
Perhaps there are some issues with SDRAM when uses as the primary
heap?
5) HSCMI TX DMA support is currently commented out.
6) I believe that there is an issue when the internal AT25 FLASH is

3
configs/sama5d3x-ek/nsh/defconfig
View File

@ -211,6 +211,7 @@ CONFIG_ARCH_HAVE_IRQPRIO=y
# CONFIG_ADDRENV is not set
CONFIG_ARCH_HAVE_VFORK=y
CONFIG_ARCH_HAVE_MMU=y
CONFIG_ARCH_NAND_HWECC=y
CONFIG_ARCH_IRQPRIO=y
CONFIG_ARCH_STACKDUMP=y
# CONFIG_ENDIAN_BIG is not set
@ -248,6 +249,7 @@ CONFIG_RAM_SIZE=114688
CONFIG_FLASH_START=0x10000000
CONFIG_FLASH_VSTART=0x10000000
CONFIG_FLASH_SIZE=134217728
# CONFIG_ARCH_HAVE_SDRAM is not set
#
# Board Selection
@ -359,7 +361,6 @@ CONFIG_DEV_NULL=y
# CONFIG_LCD is not set
# CONFIG_MMCSD is not set
# CONFIG_MTD is not set
CONFIG_ARCH_NAND_HWECC=y
# CONFIG_PIPES is not set
# CONFIG_PM is not set
# CONFIG_POWER is not set

131
configs/sama5d3x-ek/scripts/nor-ddram.ld Normal file
View File

@ -0,0 +1,131 @@
/****************************************************************************
* configs/sama5d3x-ek/scripts/nor-ddram.ld
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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 OWNER 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.
*
****************************************************************************/
/* The SAMA5D3x-EK has 128MB of NOR flash at CS0 (0x1000:0000). In this
* configuration, the .text and a copy of the .data section will be loaded
* into NOR flash. NuttX .data, .bss, the IDLE stack, and the primary
* heap will be allocated in SRAM. The SAMA5D3 has 128 KB of ISRAM beginning
* at virtual address 0x0030:0000.
*
* The SAMA5D3 has 128 KB of ISRAM beginning at virtual address 0x0030:0000
* And 256Mb of SDRAm at address 0x2000:0000. This script assumes ISRAM used
* only for the page table. All variables are retained in SDRAM.
*
* Vectors in low memory are assumed to reside at the beginning of NOR flash.
*/
MEMORY
{
norflash (W!RX) : ORIGIN = 0x10000000, LENGTH = 128M
isram (WR) : ORIGIN = 0x00304000, LENGTH = 128K - 16K
sdram (W!RX) : ORIGIN = 0x20000000, LENGTH = 256K
}
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(entry)
ENTRY(_stext)
SECTIONS
{
.text : {
_stext = ABSOLUTE(.);
*(.vectors)
*(.text .text.*)
*(.fixup)
*(.gnu.warning)
*(.rodata .rodata.*)
*(.gnu.linkonce.t.*)
*(.glue_7)
*(.glue_7t)
*(.got)
*(.gcc_except_table)
*(.gnu.linkonce.r.*)
*(.ARM.extab*)
*(.gnu.linkonce.armextab.*)
_etext = ABSOLUTE(.);
} > norflash
.init_section : {
_sinit = ABSOLUTE(.);
*(.init_array .init_array.*)
_einit = ABSOLUTE(.);
} > norflash
.ARM.extab : {
*(.ARM.extab*)
} > norflash
/* .ARM.exidx is sorted, so has to go in its own output section. */
PROVIDE_HIDDEN (__exidx_start = .);
.ARM.exidx :
{
*(.ARM.exidx* .gnu.linkonce.armexidx.*)
} > norflash
PROVIDE_HIDDEN (__exidx_end = .);
.data : {
_sdata = ABSOLUTE(.);
*(.data .data.*)
*(.gnu.linkonce.d.*)
CONSTRUCTORS
_edata = ABSOLUTE(.);
} > sdram AT > norflash
_eronly = LOADADDR(.data);
.bss : {
_sbss = ABSOLUTE(.);
*(.bss .bss.*)
*(.gnu.linkonce.b.*)
*(COMMON)
_ebss = ABSOLUTE(.);
} > sdram
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_info 0 : { *(.debug_info) }
.debug_line 0 : { *(.debug_line) }
.debug_pubnames 0 : { *(.debug_pubnames) }
.debug_aranges 0 : { *(.debug_aranges) }
}