On Thu, Mar 21, 2013 at 04:36:38PM +0100, Alexandre Belloni wrote:
> The cfa-10036 comes in two flavours, with either 128MB or 256MB of RAM
> on it.
>
> Since it's not stored anywhere, we need to runtime detect it by
> introducing the cfa10036_get_ram_size function which is similar to
> get_ram_size. As we run from RAM, we can then use _text and __bss_stop
> to prevent poking in the barebox memory which is not supported on other
> platforms.
>
> Signed-off-by: Alexandre Belloni <[email protected]>
> Cc: Maxime Ripard <[email protected]>
> ---
> arch/arm/boards/crystalfontz-cfa10036/cfa10036.c | 72
> +++++++++++++++++++++-
> 1 file changed, 71 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> index 1bc20cf..37cc17e 100644
> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> @@ -39,6 +39,8 @@
> #include <asm/armlinux.h>
> #include <asm/mmu.h>
>
> +#include <asm-generic/sections.h>
> +
> #include <mach/fb.h>
>
> #include <generated/mach-types.h>
> @@ -90,9 +92,77 @@ static struct i2c_gpio_platform_data i2c_gpio_pdata = {
> .udelay = 5, /* ~100 kHz */
> };
>
> +/*
> + * Copied from get_ram_size in common/memory.c
> + */
> +long cfa10036_get_ram_size(volatile long *base, long maxsize)
> +{
When I asked for a local version of this function I had something like
this in mind, not a complete copy of the function.
volatile u32 *base = (void *)IMX_MEMORY_BASE;
volatile u32 *ofs = base + SZ_128M;
*base = *ofs = 0xdeadbeef;
*ofs = 0x11223344;
if (*base == 0x11223344)
return SZ_128M;
else
return SZ_256M;
Sascha
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