diff options
Diffstat (limited to 'board/lwmon5/sdram.c')
| -rw-r--r-- | board/lwmon5/sdram.c | 37 |
1 files changed, 13 insertions, 24 deletions
diff --git a/board/lwmon5/sdram.c b/board/lwmon5/sdram.c index b6863b6..f906b85 100644 --- a/board/lwmon5/sdram.c +++ b/board/lwmon5/sdram.c @@ -473,7 +473,7 @@ static void program_ecc(u32 start_address, blank_string(strlen(str)); } else { /* ECC bit set method for cached memory */ -#if 1 /* test-only: will remove this define later, when ECC problems are solved! */ +#if 0 /* test-only: will remove this define later, when ECC problems are solved! */ /* * Some boards (like lwmon5) need to preserve the memory * content upon ECC generation (for the log-buffer). @@ -486,6 +486,11 @@ static void program_ecc(u32 start_address, current_address = start_address; while (current_address < end_address) { + /* + * TODO: Th following sequence doesn't work correctly. + * Just invalidating and flushing the cache doesn't + * seem to trigger the re-write of the memory. + */ ppcDcbi(current_address); ppcDcbf(current_address); current_address += CFG_CACHELINE_SIZE; @@ -514,19 +519,6 @@ static void program_ecc(u32 start_address, } #endif -static __inline__ u32 get_mcsr(void) -{ - u32 val; - - asm volatile("mfspr %0, 0x23c" : "=r" (val) :); - return val; -} - -static __inline__ void set_mcsr(u32 val) -{ - asm volatile("mtspr 0x23c, %0" : "=r" (val) :); -} - /************************************************************************* * * initdram -- 440EPx's DDR controller is a DENALI Core @@ -534,8 +526,6 @@ static __inline__ void set_mcsr(u32 val) ************************************************************************/ long int initdram (int board_type) { - u32 val; - #if 0 /* test-only: will remove this define later, when ECC problems are solved! */ /* CL=3 */ mtsdram(DDR0_02, 0x00000000); @@ -640,14 +630,6 @@ long int initdram (int board_type) * Perform data eye search if requested. */ denali_core_search_data_eye(CFG_DDR_CACHED_ADDR, CFG_MBYTES_SDRAM << 20); - - /* - * Clear possible errors resulting from data-eye-search. - * If not done, then we could get an interrupt later on when - * exceptions are enabled. - */ - val = get_mcsr(); - set_mcsr(val); #endif #ifdef CONFIG_DDR_ECC @@ -657,5 +639,12 @@ long int initdram (int board_type) program_ecc(CFG_DDR_CACHED_ADDR, CFG_MBYTES_SDRAM << 20, 0); #endif + /* + * Clear possible errors resulting from data-eye-search. + * If not done, then we could get an interrupt later on when + * exceptions are enabled. + */ + set_mcsr(get_mcsr()); + return (CFG_MBYTES_SDRAM << 20); } |