On Tue, 2013-08-06 at 20:45 -0700, Roy Franz wrote:
> The x86/AMD64 EFI stubs must us a call wrapper to convert between
> the Linux and EFI ABIs, so void pointers are sufficient. For ARM,
> the ABIs are compatible, so we can directly invoke the function
> pointers. The functions that are used by the ARM stub are updated
> to match the EFI definitions.
>
> Signed-off-by: Roy Franz <roy.franz@xxxxxxxxxx>
> ---
> include/linux/efi.h | 42 +++++++++++++++++++++++++-----------------
> 1 file changed, 25 insertions(+), 17 deletions(-)
>
> diff --git a/include/linux/efi.h b/include/linux/efi.h
> index 51f5641..96bb866 100644
> --- a/include/linux/efi.h
> +++ b/include/linux/efi.h
> @@ -39,6 +39,8 @@
> typedef unsigned long efi_status_t;
> typedef u8 efi_bool_t;
> typedef u16 efi_char16_t; /* UNICODE character */
> +typedef u64 efi_physical_addr_t;
> +typedef void *efi_handle_t;
>
>
> typedef struct {
> @@ -96,6 +98,7 @@ typedef struct {
> #define EFI_MEMORY_DESCRIPTOR_VERSION 1
>
> #define EFI_PAGE_SHIFT 12
> +#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
>
> typedef struct {
> u32 type;
> @@ -157,11 +160,12 @@ typedef struct {
> efi_table_hdr_t hdr;
> void *raise_tpl;
> void *restore_tpl;
> - void *allocate_pages;
> - void *free_pages;
> - void *get_memory_map;
> - void *allocate_pool;
> - void *free_pool;
> + int (*allocate_pages)(int, int, unsigned long, efi_physical_addr_t *);
> + int (*free_pages)(efi_physical_addr_t, unsigned long);
All of the actual function pointers that were added should return an
efi_status_t instead of int. On arm64, I was seeing an unrecognizable
error status because the truncation from 64 to 32 bits.
--Mark
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