This is a section of the log from u-boot running on Avnet Microzed board -ARM CORTEX A9:
[Thu Jun 26 17:40:53.656 2014] [Thu Jun 26 17:40:53.656 2014] [Thu Jun 26 17:40:53.656 2014] U-Boot 2013.07 (Jun 26 2014 - 17:34:41) [Thu Jun 26 17:40:53.656 2014] [Thu Jun 26 17:40:53.656 2014] 1 GiB [Thu Jun 26 17:40:53.671 2014] SF: Detected S25FL129P_64K/S25FL128S_64K with page size 64 KiB, total 16 MiB [Thu Jun 26 17:40:53.703 2014] *** Warning - bad CRC, using default environment [Thu Jun 26 17:40:53.703 2014] [Thu Jun 26 17:40:53.703 2014] In: serial [Thu Jun 26 17:40:53.703 2014] Out: serial [Thu Jun 26 17:40:53.703 2014] Err: serial [Thu Jun 26 17:40:53.703 2014] U-BOOT for ab [Thu Jun 26 17:40:53.703 2014] [Thu Jun 26 17:40:53.703 2014] [Thu Jun 26 17:40:53.703 2014] SF: Detected S25FL129P_64K/S25FL128S_64K with page size 64 KiB, total 16 MiB [Thu Jun 26 17:40:54.453 2014] SF: 5242880 bytes @ 0x520000 Read: OK [Thu Jun 26 17:40:54.453 2014] Description: PetaLinux Kernel [Thu Jun 26 17:40:54.453 2014] 0x010000f0 [Thu Jun 26 17:40:54.453 2014] 4620145 Bytes = 4.4 MiB [Thu Jun 26 17:40:54.453 2014] Description: Flattened Device Tree blob [Thu Jun 26 17:40:54.453 2014] 0x01468114 [Thu Jun 26 17:40:54.453 2014] 9766 Bytes = 9.5 KiB [Thu Jun 26 17:40:54.453 2014] Hash algo: crc32 [Thu Jun 26 17:40:54.453 2014] Hash value: 9a94aca8 [Thu Jun 26 17:40:54.453 2014] Hash algo: sha1 [Thu Jun 26 17:40:54.453 2014] Hash value: 97b81e3014decb706ff19e61e1227dace97d4232 [Thu Jun 26 17:40:54.453 2014] crc32+ sha1+ Uncompressing Kernel Image ... OK . . . I noticed that the following lines are coming twice:
SF: Detected S25FL129P_64K/S25FL128S_64K with page size 64 KiB, total 16 MiB
This corresponds to the function spi_flash_probe from drivers/mtd/spi/spi_flash.c
I need to know:
1- Why it is probed twice?
2- The name and location of the file from where this function is called (twice).
3- The second time it is being probed it is considerably slow, why it is so?
These are my u-boot environmental variable;
U-Boot-PetaLinux> printenv autoload=no baudrate=115200 bootdelay=4 bootenvsize=0x00020000 bootenvstart=0x00500000 bootfile=image.ub bootsize=0x00500000 bootstart=0x00000000 clobstart=0x1000000 console=console=ttyPS0,115200 cp_dtb2ram=sf probe 0; sf read ${clobstart} ${dtbstart} ${dtbsize} dtbboot=sf probe 0; sf read ${netstart} ${kernstart} ${kernsize}; sf read ${dtbnetstart} ${dtbstart} ${dtbsize}; bootm ${netstart} - ${dtbnetstart} dtbnetboot=tftp ${netstart} image.ub; tftp ${dtbnetstart} system.dtb; bootm ${netstart} - ${dtbnetstart} dtbnetstart=0x1500000 eraseconf=sf probe 0; sf erase ${confstart} ${confsize} eraseenv=sf probe 0; sf erase ${bootenvstart} ${bootenvsize} ethact=Gem.e000b000 ethaddr=00:0a:35:00:07:c0 fault=echo $img image size is greater than allocated place - $img is NOT UPDATED get_dtb=run cp_dtb2ram; fdt addr ${clobstart} hostname="Peta_MicroZed" install_dtb=sf probe 0; sf erase ${dtbstart} ${dtbsize};sf write ${clobstart} ${dtbstart} ${filesize} install_jffs2=sf probe 0; sf erase ${jffs2start} ${jffs2size};sf write ${clobstart} ${jffs2start} ${filesize} install_kernel=sf probe 0; sf erase ${kernstart} ${kernsize};sf write ${fileaddr} ${kernstart} ${filesize} install_uboot=sf probe 0; sf erase ${bootstart} ${bootsize};sf write ${clobstart} ${bootstart} ${filesize} kernsize=0x00500000 kernstart=0x00520000 load_boot=tftp ${clobstart} BOOT.BIN load_dtb=tftp ${clobstart} system.dtb load_jffs2=tftp ${clobstart} rootfs.jffs2 load_kernel=tftp ${clobstart} image.ub loadaddr=0x1000000 mtdids=nor0=0 mtdparts=mtdparts=0:5M(boot),128K(bootenv),851968(image) nc=setenv stdout nc;setenv stdin nc; ncip=192.168.1.11 netboot=tftp ${netstart} image.ub && bootm netstart=0x1000000 psserial0=setenv stdout ttyPS0;setenv stdin ttyPS0 sd_update_boot=echo Updating BOOT from SD;mmcinfo && fatload mmc 0:1 ${clobstart} BOOT.BIN && run install_uboot sd_update_kernel=echo Updating Kernel from SD;mmcinfo && fatload mmc 0:1 ${clobstart} ${bootfile}&& set fileaddr ${clobstart}&&run install_kernel sdboot=echo boot Petalinux; mmcinfo && fatload mmc 0 ${netstart} ${bootfile}&& bootm serial=setenv stdout serial;setenv stdin serial serverip=192.168.1.11 sfboot=sf probe 0; sf read ${netstart} ${kernstart} ${kernsize}; bootm ${netstart} silent=1 silent-kinux=yes silent_linux=yes test_crc=if imi ${clobstart}; then run test_img; else echo $img Bad CRC - $img is NOT UPDATED; fi test_img=setenv var "if test ${filesize} -gt ${psize}; then run fault; else run ${installcmd}; fi"; run var; setenv var update_boot=setenv img BOOT.BIN; setenv psize ${bootsize}; setenv installcmd install_uboot; run load_boot test_img; setenv img; setenv psize; setenv installcmd update_dtb=setenv img DTB; setenv psize ${dtbsize}; setenv installcmd install_dtb; run load_dtb test_img; setenv img update_jffs2=setenv img JFFS2; setenv psize ${jffs2size}; setenv installcmd install_jffs2; run load_jffs2 test_img; setenv img; setenv psize; setenv installcmd update_kernel=setenv img KERNEL; setenv psize ${kernsize}; setenv installcmd "install_kernel"; run load_kernel test_crc; setenv img; setenv psize; setenv installcmd varify=n Environment size: 3214/131068 bytes 
