[U-Boot] [PATCH v3] x86: baytrail: pci region 3 is not always mapped to end of ram

[Bin Meng]

On Thu, Jun 4, 2015 at 12:37 AM,  <andrew at bradfordembedded.com> wrote:
> From: Andrew Bradford <andrew.bradford at kodakalaris.com>
>
> Baytrail physically maps the first 2 GB of SDRAM from 0x0 to 0x7FFFFFFF
> and additional SDRAM is mapped from 0x100000000 and up.  There is a
> physical memory hole from 0x80000000 to 0xFFFFFFFF for other uses.
> Because of this, PCI region 3 should only try to use up to the amount of
> SDRAM or 0x80000000, which ever is less.
>
> Signed-off-by: Andrew Bradford <andrew.bradford at kodakalaris.com>
> ---
> v3: Fix build breakage due to semicolon
> v2: limit maximum size to lesser of SDRAM or 0x80000000
> ---
>  arch/x86/cpu/baytrail/pci.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/cpu/baytrail/pci.c b/arch/x86/cpu/baytrail/pci.c
> index 6c291f9..48409de 100644
> --- a/arch/x86/cpu/baytrail/pci.c
> +++ b/arch/x86/cpu/baytrail/pci.c
> @@ -39,7 +39,7 @@ void board_pci_setup_hose(struct pci_controller *hose)
>         pci_set_region(hose->regions + 3,
>                        0,
>                        0,
> -                      gd->ram_size,
> +                      gd->ram_size < 0x80000000 ? gd->ram_size : 0x80000000,
>                        PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
>
>         hose->region_count = 4;
> --

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>