[SeaBIOS] [PATCH] mark VBE mapping as reserved in e820

[Izik Eidus]

On Sat, 23 Jan 2010 16:02:05 -0200
Marcelo Tosatti <mtosatti at redhat.com> wrote:

> 
> Izik, is this still needed? 

Hi,

Look correct acording to the acpi spec.

> 
> From: Izik Eidus <ieidus at redhat.com>
> 
> The vbe was not registered as reserved memory, and therefore windows was
> able to try to map pci devices into this address range.
> 
> Signed-off-by: Marcelo Tosatti <mtosatti at redhat.com>
> 
> diff --git a/src/post.c b/src/post.c
> index fb3b37f..3a1be89 100644
> --- a/src/post.c
> +++ b/src/post.c
> @@ -96,6 +96,9 @@ init_bda(void)
>      ebda->size = esize;
>  }
>  
> +#define VBE_DISPI_LFB_PHYSICAL_ADDRESS  0xE0000000
> +#define VGA_RAM_SIZE (16 * 1024 * 1024)
> +
>  static void
>  ram_probe(void)
>  {
> @@ -140,6 +143,8 @@ ram_probe(void)
>          // other page for EPT real mode pagetable
>          add_e820(0xfffbc000, 4*4096, E820_RESERVED);
>  
> +    add_e820(VBE_DISPI_LFB_PHYSICAL_ADDRESS, VGA_RAM_SIZE, E820_RESERVED);
> +
>      dprintf(1, "Ram Size=0x%08x (0x%08x%08x high)\n"
>              , RamSize, (u32)(RamSizeOver4G >> 32), (u32)RamSizeOver4G);
>  }