U-Boot on new board: JTAG-loading fails at BSS memset step
I'm trying to bring up U-Boot on a very simple board of mine: a BF532 with 32 MB SDRAM. Initially I couldn't get any SDRAM functionality to work but with the help of the BfSdcCalculation spreadsheet posted here I was able to get my SDGCTL/SDRRC/SDBCTL registers configured properly such that I can do an exhaustive test of all 32 MB of memory by adding the following code to the end of initcode.c and loading/running it via gnICE JTAG:
/ * ... */
serial_putc('>');
serial_putc('\n');
/* Full memory coverage */
volatile unsigned short *mem_test_16;
volatile unsigned char *mem_test_8;
unsigned short patterns[] = { 0x5555, 0xAAAA, 0xFFFF, 0x0000 };
int patt_ndx;
for (patt_ndx = 0; patt_ndx < 4; ++patt_ndx)
{
mem_test_16 = (unsigned short *)(0x02000000);
unsigned short pattern = patterns[patt_ndx];
serial_putc('\n');
serial_putc('T');
serial_putc(':');
serial_put_word16(pattern);
serial_putc('\n');
serial_put_word32((unsigned int)mem_test_16);
while (mem_test_16 > 2)
{
--mem_test_16;
*mem_test_16 = pattern;
__builtin_bfin_ssync();
if (*mem_test_16 != pattern)
{
serial_put_word16(pattern);
serial_putc(':');
serial_put_word32((unsigned int)mem_test_16);
serial_putc(':');
serial_put_word16(*mem_test_16);
serial_putc('\n');
}
}
}
serial_deinit();
}
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This GDB was configured as "--host=x86_64-unknown-linux-gnu --target=bfin-elf"...
(gdb) target remote :2000
Remote debugging using :2000
0xef000000 in ?? ()
(gdb) load init.elf
Loading section .text, size 0xca8 lma 0xffa08000
Start address 0xffa08000, load size 3240
Transfer rate: 143204 bits/sec, 3240 bytes/write.
(gdb) c
Continuing.
Program received signal SIGTRAP, Trace/breakpoint trap.
bfin_reset () at reset.c:45
45 asm(
(gdb) load u-boot
Loading section .text.pre, size 0x1f8 lma 0x1fc0000
Loading section .text.init, size 0xc98 lma 0x1fc01f8
Loading section .text, size 0xad50 lma 0x1fc0e90
Loading section .rodata, size 0x4a5c lma 0x1fcbbe0
Loading section .data, size 0x9ca lma 0x1fd063c
Loading section .u_boot_cmd, size 0x408 lma 0x1fd1008
Loading section .text_l1, size 0x28 lma 0x1fd1410
Start address 0x1fc0000, load size 70710
Transfer rate: 1484724 bits/sec, 7071 bytes/write.
(gdb) call memset(&_bss_vma, 0, &_bss_len)
Program received signal SIGTRAP, Trace/breakpoint trap.
0x01fc15aa in memset ()
The program being debugged was signaled while in a function called from GDB.
GDB remains in the frame where the signal was received.
To change this behavior use "set unwindonsignal on"
Evaluation of the expression containing the function (memset) will be abandoned.
(gdb) c
I tried changing the unwindonsignal behaviour, but get this error:
I should note that I can build, JTAG-load, and run U-Boot on my BF533-STAMP board using the same procedure.
I'm running with the following environment:
U-Boot-2010.06-2010R1-RC2
bfin-elf-gcc (ADI-2010R1-RC4) 4.3.5
BF532-0.6
Micron MT48LC16M16A2-7E SDRAM chip
CLKIN = 12.00 MHz
VCO_MULT = 28
CCLK_DIV = 1 (CCLK = 336 MHz)
SCLK_DIV = 4 (SCLK = 84 MHz)
EBIU_SDGCTL = 0x80911109
EBIU_SDRRC = 0x028A
I've attached the u-boot board config file I'm using. Any suggestions?
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polycam-bf532.h.zip 1.8 K
