On 11/06/2012 11:09, Teemu Keskinarkaus wrote: > Hi, > Hi,
> I need to access IRAM from U-boot in MX53 based HW. This is part of the data > transfer between kernel and U-boot. I've already done the kernel part and now > I need to do the U-boot part. > > I tried this: > > #define IRAM_ADDRESS IRAM_BASE_ADDR + IRAM_SIZE - SZ_4K > > unsigned long *iram = (unsigned long*)IRAM_ADDRESS; > unsigned long data; > > data = *iram; > > But with that code the U-boot just gets stuck when trying to access the IRAM. > I looked and it seems that IRAM is added to MMU definitions and virtual > address is the same as physical. In u-boot, the MMU is not turned on. This was done by design to make things simpler. I do not know what you are talking about. > > So questions is. How should I access the IRAM if the method I'm using is not > correct or what's wrong in my method? MX53LOCO U-Boot > md 0xF8000000 f8000000: 5f04dbd6 e0a62773 fa92b272 e85f7213 ..._s'..r....r_. f8000010: 946065a3 fbe525ce 0cedf27e d2f2e4df .e`..%..~....... f8000020: e7d76787 e8e97cfe 49927a97 d2b1a033 .g...|...z.I3... f8000030: e84ac878 ec76c015 4fde5c14 338d88c8 x.J...v..\.O...3 f8000040: f797b909 fabf35ba 9dee0101 61b6c523 .....5......#..a f8000050: 3a9057e3 dbea4c77 8347b4bd bcbce01a .W.:wL....G..... iram is read flawlessy. Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sba...@denx.de ===================================================================== _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
