diff options
Diffstat (limited to 'board/mpc8266ads')
| -rw-r--r-- | board/mpc8266ads/mpc8266ads.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/board/mpc8266ads/mpc8266ads.c b/board/mpc8266ads/mpc8266ads.c index 501e610..c6c8d76 100644 --- a/board/mpc8266ads/mpc8266ads.c +++ b/board/mpc8266ads/mpc8266ads.c @@ -46,7 +46,7 @@ * PSDMR_BUFCMD adds a clock * 0 no extra clock */ -#define CONFIG_PBI 0 +#define CONFIG_PBI PSDMR_PBI #define PESSIMISTIC_SDRAM 0 #define EAMUX 0 /* EST requires EAMUX */ #define BUFCMD 0 @@ -379,6 +379,25 @@ long int initdram(int board_type) sdram_size = 1 << (rows + cols + banks + width); + /* hack for high density memory (512MB per CS) */ + /* !!!!! Will ONLY work with Page Based Interleave !!!!! + ( PSDMR[PBI] = 1 ) + */ + /* mamory actually has 11 column addresses, but the memory controller + doesn't really care. + the calculations that follow will however move the rows so that + they are muxed one bit off if you use 11 bit columns. + The solution is to tell the memory controller the correct size of the memory + but change the number of columns to 10 afterwards. + The 11th column addre will still be mucxed correctly onto the bus. + + Also be aware that the MPC8266ADS board Rev B has not connected + Row addres 13 to anything. + + The fix is to connect ADD16 (from U37-47) to SADDR12 (U28-126) + */ + if (cols > 10) + cols = 10; #if(CONFIG_PBI == 0) /* bank-based interleaving */ rowst = ((32 - 6) - (rows + cols + width)) * 2; |