On Thu, Aug 03, 2017 at 03:19:25PM +, Vladimir 'phcoder' Serbinenko wrote:
> Looks good. But out of context the name is not descriptive enough. Can we
> add a comment near declaration to clarify what this functions is for?
Sure - will do.
/
Leif
> Le Thu, Aug 3, 2017 à 12:07 PM, Leif Lindholm a
> écrit :
>
> > There are several implementations of this function in the tree.
> > Add a central version in grub-core/efi/mm.c.
> >
> > Taken from grub-core/loader/i386/linux.c, changing some hard-coded
> > constants
> > to use macros from efi/memory.h.
> >
> > Signed-off-by: Leif Lindholm
> > ---
> > grub-core/kern/efi/mm.c | 44
> > include/grub/efi/efi.h | 1 +
> > 2 files changed, 45 insertions(+)
> >
> > diff --git a/grub-core/kern/efi/mm.c b/grub-core/kern/efi/mm.c
> > index 20a47aaf5..31ca703ec 100644
> > --- a/grub-core/kern/efi/mm.c
> > +++ b/grub-core/kern/efi/mm.c
> > @@ -217,6 +217,50 @@ grub_efi_finish_boot_services (grub_efi_uintn_t
> > *outbuf_size, void *outbuf,
> >return GRUB_ERR_NONE;
> > }
> >
> > +grub_efi_uintn_t
> > +grub_efi_find_mmap_size (void)
> > +{
> > + static grub_efi_uintn_t mmap_size = 0;
> > +
> > + if (mmap_size != 0)
> > +return mmap_size;
> > +
> > + mmap_size = 1 * GRUB_EFI_PAGE_SIZE;
> > + while (1)
> > +{
> > + int ret;
> > + grub_efi_memory_descriptor_t *mmap;
> > + grub_efi_uintn_t desc_size;
> > + grub_efi_uintn_t cur_mmap_size = mmap_size;
> > +
> > + mmap = grub_malloc (cur_mmap_size);
> > + if (! mmap)
> > + return 0;
> > +
> > + ret = grub_efi_get_memory_map (_mmap_size, mmap, 0, _size,
> > 0);
> > + grub_free (mmap);
> > +
> > + if (ret < 0)
> > + {
> > + grub_error (GRUB_ERR_IO, "cannot get memory map");
> > + return 0;
> > + }
> > + else if (ret > 0)
> > + break;
> > +
> > + if (mmap_size < cur_mmap_size)
> > + mmap_size = cur_mmap_size;
> > + mmap_size += GRUB_EFI_PAGE_SIZE;
> > +}
> > +
> > + /* Increase the size a bit for safety, because GRUB allocates more on
> > + later, and EFI itself may allocate more. */
> > + mmap_size += 3 * GRUB_EFI_PAGE_SIZE;
> > +
> > + mmap_size = ALIGN_UP (mmap_size, GRUB_EFI_PAGE_SIZE);
> > + return mmap_size;
> > +}
> > +
> > /* Get the memory map as defined in the EFI spec. Return 1 if successful,
> > return 0 if partial, or return -1 if an error occurs. */
> > int
> > diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
> > index e9c601f34..3984de083 100644
> > --- a/include/grub/efi/efi.h
> > +++ b/include/grub/efi/efi.h
> > @@ -42,6 +42,7 @@ EXPORT_FUNC(grub_efi_allocate_pages)
> > (grub_efi_physical_address_t address,
> > grub_efi_uintn_t pages);
> > void EXPORT_FUNC(grub_efi_free_pages) (grub_efi_physical_address_t
> > address,
> >grub_efi_uintn_t pages);
> > +grub_efi_uintn_t EXPORT_FUNC(grub_efi_find_mmap_size) (void);
> > int
> > EXPORT_FUNC(grub_efi_get_memory_map) (grub_efi_uintn_t *memory_map_size,
> > grub_efi_memory_descriptor_t
> > *memory_map,
> > --
> > 2.11.0
> >
> >
> > ___
> > Grub-devel mailing list
> > Grub-devel@gnu.org
> > https://lists.gnu.org/mailman/listinfo/grub-devel
> >
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