Hi,
On 17-01-15 23:44, Ian Campbell wrote:
On Thu, 2015-01-15 at 15:52 +0100, Hans de Goede wrote:
The DRAM Base differs between sun9i and the others and we cannot use
math in various places like the environment setting and linker scripts,
so "simply" define everything which contains the SDRAM_BASE twice.
Is it really not possible to use maths in linker scripts? How have I
never noticed that...
I'm not 100% sure on that, I'm sure that it is not possible in the
environment stuff, so I thought lets play it safe and just write it
out fully for everything. I will drop the unconfirmed linker script
reference from the commit message for v2
Anyway, given that things only differ in the most significant nibble of
the RAM base address I think something like this might work:
/* NB: find out if one of these is already available somewhere */
#define __stringify(x) #x
#define stringify(x) __stringify(x)
#define SDRAM_OFFSET(x) 0x2##x /* or 0x4 */
#define CONFIG_SYS_SDRAM_BASE SDRAM_OFFSET(0000000)
#define MEM_LAYOUT_ENV_SETTINGS \
"kernel_addr_r=" stringify(SDRAM_OFFSET(200000)) "\0"
...
Yeah I think that will work. I'll do that for v2 (it may take a few
days before I get around to doing / posting a v2).
Regards,
Hans
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