Re: [Minios-devel] [PATCH v2 13/18] mini-os: add function to map one frame

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>]

Juergen Gross, on Fri 05 Aug 2016 19:35:57 +0200, wrote:
> Add a function to map one physical frame to a specified virtual
> address as read/write. This will be used later multiple times.
> 
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>

Reviewed-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>

> ---
>  include/arm/arch_mm.h | 2 ++
>  include/mm.h          | 1 +
>  mm.c                  | 5 +++++
>  3 files changed, 8 insertions(+)
> 
> diff --git a/include/arm/arch_mm.h b/include/arm/arch_mm.h
> index 085d4e5..f4685d8 100644
> --- a/include/arm/arch_mm.h
> +++ b/include/arm/arch_mm.h
> @@ -14,6 +14,8 @@ extern uint32_t physical_address_offset;    /* Add this to 
> a virtual address to get
>  
>  #define L1_PAGETABLE_SHIFT      12
>  
> +#define L1_PROT          0
> +
>  #define to_phys(x)                 (((paddr_t)(x)+physical_address_offset) & 
> 0xffffffff)
>  #define to_virt(x)                 ((void *)(((x)-physical_address_offset) & 
> 0xffffffff))
>  
> diff --git a/include/mm.h b/include/mm.h
> index 9244e26..6add683 100644
> --- a/include/mm.h
> +++ b/include/mm.h
> @@ -72,6 +72,7 @@ int do_map_frames(unsigned long addr,
>          const unsigned long *f, unsigned long n, unsigned long stride,
>       unsigned long increment, domid_t id, int *err, unsigned long prot);
>  int unmap_frames(unsigned long va, unsigned long num_frames);
> +int map_frame_rw(unsigned long addr, unsigned long mfn);
>  #ifdef HAVE_LIBC
>  extern unsigned long heap, brk, heap_mapped, heap_end;
>  #endif
> diff --git a/mm.c b/mm.c
> index ff071ca..fd66115 100644
> --- a/mm.c
> +++ b/mm.c
> @@ -319,6 +319,11 @@ int free_physical_pages(xen_pfn_t *mfns, int n)
>      return HYPERVISOR_memory_op(XENMEM_decrease_reservation, &reservation);
>  }
>  
> +int map_frame_rw(unsigned long addr, unsigned long mfn)
> +{
> +    return do_map_frames(addr, &mfn, 1, 1, 1, DOMID_SELF, NULL, L1_PROT);
> +}
> +
>  #ifdef HAVE_LIBC
>  void *sbrk(ptrdiff_t increment)
>  {
> -- 
> 2.6.6
> 

-- 
Samuel
<c> xlnt comme sujet de stage je peux essayer de donner une description 
formelle de automake
 -+- #ens-mim -+-

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