> Newer kernels support dynamically allocating this parameter RAM. Older > kernels use whatever u-boot chose. > > Why do you want to set it to a particular address?
There should be some code to set SMC1_BASE to the 0x87FC offset of the DPRAM, whatever SMC1_BASE is fixed or dynamically allocated . My kernel is 2.6.25, this SMC1_BASE value can be transferred to kernel by dts tree, but I have not find the code to set it to 0x87FC offset of the DPRAM. Or there is another way to solve it ? ----- Original Message ----- From: "Scott Wood" <scottw...@freescale.com> To: "hellohello" <hellohello...@163.com> Cc: <linuxppc-dev@lists.ozlabs.org> Sent: Saturday, May 22, 2010 1:28 AM Subject: Re: Problem of PowerPc 82xx when using smc > On 05/20/2010 10:33 PM, hellohello wrote: >>> No, it shouldn't -- rx_bd_base is of type "cbd_t *", so the multiplication >>> already happens as part of pointer arithmetic. >> ---Yes, you are right. I made a basic mistake. >> >> But now I have another question. >> The SMC1 params can be relocated to any offset of the DPRAM on a 64 byte >> boundary, not as the SCC1, which must be at 0x8000 offset of the DPRAM. >> The SMC1 params base is set at 0x87FC offset of the DPRAM. >> >> So if I want SMC1 params start at 0x200 in DPRAM , I should set 0x200 to >> the 0x87FC offset of the DPRAM. >> I have see this code in u-boot, but I can not find this code in neither >> cpm_uart_cpm2.c nor cpm_uart_core.c. >> >> Should I add these code to cpm_uart_core.c? > > Newer kernels support dynamically allocating this parameter RAM. Older > kernels use whatever u-boot chose. > > Why do you want to set it to a particular address? > > -Scott > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
