Any reason to use plain error numbers without grub_error?
Le Thu, Aug 3, 2017 à 12:09 PM, Leif Lindholm <leif.lindh...@linaro.org> a
écrit :
> Since ARM platforms do not have a common memory map, add a helper
> function that finds the lowest address region with the EFI_MEMORY_WB
> attribute set in the UEFI memory map.
>
> Required for the arm/arm64 linux loader to restrict the initrd
> location to where it will be accessible by the kernel at runtime.
>
> Signed-off-by: Leif Lindholm <leif.lindh...@linaro.org>
> ---
> grub-core/kern/efi/mm.c | 36 ++++++++++++++++++++++++++++++++++++
> include/grub/efi/efi.h | 3 +++
> 2 files changed, 39 insertions(+)
>
> diff --git a/grub-core/kern/efi/mm.c b/grub-core/kern/efi/mm.c
> index 31ca703ec..8413c19e5 100644
> --- a/grub-core/kern/efi/mm.c
> +++ b/grub-core/kern/efi/mm.c
> @@ -569,3 +569,39 @@ grub_efi_mm_init (void)
> grub_efi_free_pages ((grub_addr_t) memory_map,
> 2 * BYTES_TO_PAGES (MEMORY_MAP_SIZE));
> }
> +
> +#if defined (__aarch64__)
> +grub_err_t
> +grub_efi_get_ram_base(grub_addr_t *base_addr)
> +{
> + grub_efi_memory_descriptor_t *memory_map;
> + grub_efi_memory_descriptor_t *desc;
> + grub_efi_uintn_t mmap_size;
> + grub_efi_uintn_t desc_size;
> + int ret;
> +
> + mmap_size = grub_efi_find_mmap_size();
> +
> + memory_map = grub_malloc (mmap_size);
> + if (! memory_map)
> + return GRUB_ERR_OUT_OF_MEMORY;
> + ret = grub_efi_get_memory_map (&mmap_size, memory_map, NULL,
> + &desc_size, NULL);
> +
> + if (ret < 1)
> + return GRUB_ERR_BUG;
> +
> + for (desc = memory_map, *base_addr = GRUB_UINT_MAX;
> + (grub_addr_t) desc < ((grub_addr_t) memory_map + mmap_size);
> + desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size))
> + {
> + if (desc->attribute & GRUB_EFI_MEMORY_WB)
> + if (desc->physical_start < *base_addr)
> + *base_addr = desc->physical_start;
> + }
> +
> + grub_free(memory_map);
> +
> + return GRUB_ERR_NONE;
> +}
> +#endif
> diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
> index 3984de083..80ab56795 100644
> --- a/include/grub/efi/efi.h
> +++ b/include/grub/efi/efi.h
> @@ -85,6 +85,9 @@ extern void (*EXPORT_VAR(grub_efi_net_config))
> (grub_efi_handle_t hnd,
> #if defined(__arm__) || defined(__aarch64__)
> void *EXPORT_FUNC(grub_efi_get_firmware_fdt)(void);
> #endif
> +#if defined(__aarch64__)
> +grub_err_t EXPORT_FUNC(grub_efi_get_ram_base)(grub_addr_t *);
> +#endif
>
> grub_addr_t grub_efi_modules_addr (void);
>
> --
> 2.11.0
>
>
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> https://lists.gnu.org/mailman/listinfo/grub-devel
>
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
https://lists.gnu.org/mailman/listinfo/grub-devel
