Kim Phillips schrieb:
On Tue, 25 Mar 2008 20:41:41 +0100 Andre Schwarz andre.schwarz@matrix-vision.de wrote:
Kim Phillips schrieb:
On Tue, 25 Mar 2008 18:36:47 +0100 Andre Schwarz andre.schwarz@matrix-vision.de wrote:
As far as I can see there are only DDR-I boards from Freescale.
The MDS can do ddr2:
U-Boot 1.3.2-00097-gbc508d1 (Mar 25 2008 - 10:47:17) MPC83XX
Reset Status: Software Hard, External/Internal Soft, External/Internal Hard
CPU: e300c1, MPC8349E, Rev: 30 at 528 MHz, CSB: 264 MHz Board: Freescale MPC8349EMDS I2C: ready SPI: ready DRAM: 256 MB (DDR2, 64-bit, ECC on) ...
Hmmm ... I get :
U-Boot 1.3.2-00075-gc5f497a-dirty (Mar 25 2008 - 19:55:00) MPC83XX
Reset Status: Check Stop, External/Internal Soft, External/Internal Hard
CPU: e300c1, MPC8343, Rev: 31 at 399.999 MHz, CSB: 266 MHz Board: Matrix Vision mvBlueLYNX-M7 I2C: ready SPI: ready DRAM: cs0_bnds = 0x0000000f cs0_config = 0x80844102 DDR:bar=0x00000000 DDR:ar=0x8000001b 256 MB
It's a 32-Bit DDR-II without ECC. 2 Chips are soldered to CS0, i.e. no EPROM present.
Since I expect something like "(DDR2, 32-Bit, ECC off)" and nothing happens there is obviously something wrong with my memory setup. Is this reasonable ?
sounds like memory isn't being configured correctly. Board specific?
Having a closer look to the boards show that I'm currently using 2 Micron MT47H256M8HG-3 with 2GBit each yielding a total of 512MByte DDR-II memory .... this is sad :-( Regarding to part list there should have been 1GBit Elpida chips on it.
I've seen things like this in mpc8349emds code :
#if (CFG_DDR_SIZE != 256) #warning Currenly any ddr size other than 256 is not supported #endif
Is this reasonable ? Why ?
Or am I simply missing a board specific "board_add_ram_info" ?
you can do that if you really, really, really want to see the "(DDR2.." string, but it's optional.
I don't want to see it but to understand where it comes from.
Am I assuming right that your info string "(DDR2, 64-bit, ECC on)" comes from spd_sdram ?
yes.
Kim
regards, Andre
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