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SAMA5D4: Fix ISRAM base address: 0x00200000, not like the SAMA5D3 SRAM at 0x00300000

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This commit is contained in:
Gregory Nutt 2014-06-18 13:03:10 -06:00
parent b013a0fa48
commit 151d84709f
4 changed files with 28 additions and 6 deletions
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22
configs/sama5d4-ek/README.txt
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@ -2944,6 +2944,28 @@ Configurations
DataFlash, SD card or from a TFTPC sever via the Boot ROM.
Data also is positioned in SDRAM.
Here are the steps that I use to execute this program in SRAM
using only the ROM Bootloader:
a) Hold the DIS_BOOT button and
b) With the DIS_BOOT button pressed, power cycle the board.
c) The serial should show RomBOOT in a terminal window (at 115200
8N1) and nothing more.
d) Press ENTER in the terminal window a few times to enable JTAG.
e) Start the Segger GDB server. It should successfully connect to
the board via JTAG.
f) Start GDB
gdb> target remote localhost:2331
gdb> mon halt (don't do mon reset)
gdb> load nuttx
gdb> mon reg pc (make sure that the PC is 0x200040
gdb> ... and debug ...
To-Do List
==========

4
configs/sama5d4-ek/ramtest/defconfig
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@ -282,8 +282,8 @@ CONFIG_BOOT_RUNFROMISRAM=y
#
# Boot Memory Configuration
#
CONFIG_RAM_START=0x00300000
CONFIG_RAM_VSTART=0x00300000
CONFIG_RAM_START=0x00200000
CONFIG_RAM_VSTART=0x00200000
CONFIG_RAM_SIZE=114688
CONFIG_ARCH_HAVE_SDRAM=y
# CONFIG_BOOT_SDRAM_DATA is not set

4
configs/sama5d4-ek/scripts/ddram.ld
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@ -33,7 +33,7 @@
*
****************************************************************************/
/* The SAMA5D4 has 128 KB of ISRAM beginning at virtual address 0x0030:0000.
/* The SAMA5D4 has 128 KB of ISRAM beginning at virtual address 0x0020:0000.
* This memory configuration, however, loads into the 256MB SDRAM on board
* the SAMA5D4-EK which lies at 0x2000:0000. An offset 0x00008000 is
* reserved by the bootloader.
@ -44,7 +44,7 @@
MEMORY
{
isram (W!RX) : ORIGIN = 0x300000, LENGTH = 128K - 16K
isram (W!RX) : ORIGIN = 0x00200000, LENGTH = 128K - 16K
sdram (W!RX) : ORIGIN = 0x20008000, LENGTH = 256M - 32K
}

4
configs/sama5d4-ek/scripts/isram.ld
View File

@ -33,7 +33,7 @@
*
****************************************************************************/
/* The SAMA5D44 has 128 KB of ISRAM beginning at virtual address 0x0030:0000.
/* The SAMA5D44 has 128 KB of ISRAM beginning at virtual address 0x0020:0000.
*
* Vectors in low memory are assumed and 16KB of ISRAM is reserved at the
* high end of ISRAM for the page table.
@ -41,7 +41,7 @@
MEMORY
{
isram (W!RX) : ORIGIN = 0x300000, LENGTH = 128K - 16K
isram (W!RX) : ORIGIN = 0x00200000, LENGTH = 128K - 16K
}
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")