Hi,
Can an old u-boot (e.g. 1.1.2) boot a latest powerpc based kernel (e.g. 2.6.33)? I noticed that the bd_info in the latest u-boot is different from the one in 1.1.2. The custom board with u-boot 1.1.2 passed only the first 6 parameters to a 2.4 kernel shown as below.
typedef struct bd_info { /*======================================================================*/ unsigned long bi_memstart; /* start of DRAM memory */ unsigned long bi_memsize; /* size of DRAM memory in bytes */ unsigned long bi_intfreq; /* Internal Freq, in MHz */ unsigned long bi_busfreq; /* Bus Freq, in MHz */ unsigned char bi_enetaddr[6]; /* Ethernet adress */ unsigned long bi_baudrate; /* Console Baudrate */ unsigned long bi_flashstart; /* start of FLASH memory */ unsigned long bi_flashsize; /* size of FLASH memory */ unsigned long bi_flashoffset; /* reserved area for startup monitor */ unsigned long bi_sramstart; /* start of SRAM memory */ unsigned long bi_sramsize; /* size of SRAM memory */ #if defined(CONFIG_5xx) || defined(CONFIG_8xx) || defined(CONFIG_8260) \ || defined(CONFIG_E500) unsigned long bi_immr_base; /* base of IMMR register */ #endif <...snipped> }
The customer does't want to upgrade u-boot. If linux drivers are ported to the new powerpc arch, is u-boot 1.1.2 still able to boot the new kernel? Besides the bd_info, what else the powerpc kernel expect from u-boot?
Thanks, -Shawn.