Hello Wolfgang and Stefan,

This is a patch which defines flash_read64 weak in cfi_flash.c, cpu/leon3/cpu_init.c defines this function for SPARC.

SPARC has implemented __raw_readq, it reads 64-bit from any 32-bit address.

For current SPARC architectures (LEON2 and LEON3) each read from the FLASH must lead to a cache miss. This is because FLASH can not be set non-cacheable since program code resides there, and alternatively disabling cache is poor from performance view, or doing a cache flush between each read is even poorer.

Forcing a cache miss on a SPARC is done by a special instruction "lda" - load alternative space, the alternative space number (ASI) is processor implementation specific and can be found in <asm-sparc/asi.h>.

This patch is also available at ftp://ftp.gaisler.com/gaisler.com/uboot/patches.

Best Regards, Daniel Hellstrom

drivers/mtd/cfi_flash.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)

diff --cc drivers/mtd/cfi_flash.c index f04c72d,f04c72d..a55afc9 --- a/drivers/mtd/cfi_flash.c +++ b/drivers/mtd/cfi_flash.c @@@ -239,12 -239,12 +239,14 @@@ static u32 flash_read32(void *addr return __raw_readl(addr); }

--static u64 flash_read64(void *addr) ++static u64 __flash_read64(void *addr) { /* No architectures currently implement __raw_readq() */ return *(volatile u64 *)addr; }

++u64 flash_read64(void *addr)__attribute__((weak, alias("__flash_read64"))); ++ /*----------------------------------------------------------------------- */ #if defined(CFG_ENV_IS_IN_FLASH) || defined(CFG_ENV_ADDR_REDUND) || (CFG_MONITOR_BASE >= CFG_FLASH_BASE)