Thank you for your reply. u-boot 2014.01-rc3
The board MPC8572DS could work well with the u-boot code.However, when I want to boot from the nand flash. There's something wrong. I have modified the CS0 to nand flash. when I make the uboot code, I use the command " make distclean; make MPC8572DS_NAND". * the create_init_ram_area in start.S:* It should create a tlb1_entry 15 in AS1, but instead it creates a tlb1_entry 15 for AS0 and have a wrong size(if the fifth bit of the tlb1_entry 15 value is for the AS.) According to the code, the size of this entry should be 1Mbyte. However the real one is 256Mbyte. in the start_e500 in start.S: there should be a tlb1_entry 2 (for e500 debugging) for AS0 , again when I tracing the execution of the code, I didn't find the tlb entry is constructed. cheers, Y.Fan 2014-02-12 23:11 GMT+01:00 Scott Wood <scottw...@freescale.com>: > On Thu, 2014-01-30 at 15:57 +0100, Y fan wrote: > > Hello, > > > > The memory of the MPC8572DS can't be read correctly after the setup of > the > > tlb1_entry in the 4K boot code. > > What specific memory location can't be read? What part of the code is > failing? > > What version of U-Boot are you running? > > > And also in the create_init_ram code, the tlb1_entry15&14 are set to be > in > > the address space 0 which are supposed to be used in the address space 1. > > There seems somthing wrong with the writing of the TLB entry. But I don't > > know why. Do anyone know the reason? > > If you mean create_init_ram_area in start.S, it is creating the entries > in AS1. What do you see than indicates the contrary? > > -Scott > > >
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