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| author |   Arvind Sankar <nivedita@alum.mit.edu> | 2020-04-30 14:28:34 -0400 |
|---|---|---|
| committer |   Ard Biesheuvel <ardb@kernel.org> | 2020-05-01 09:40:02 +0200 |
| commit | eed4e0193ee7b00213791f7732bce0fc0c54f3b3 (patch) | |
| tree | a2a34483e9df5bbb9e372bdd64b0d58ea681055e /drivers/firmware/efi/libstub/efistub.h | |
| parent | efi/x86: Use correct size for boot_params (diff) | |
| download | linux-dev-eed4e0193ee7b00213791f7732bce0fc0c54f3b3.tar.xz linux-dev-eed4e0193ee7b00213791f7732bce0fc0c54f3b3.zip | |
efi/libstub: Add a helper function to split 64-bit values
In several places 64-bit values need to be split up into two 32-bit
fields, in order to be backward-compatible with the old 32-bit ABIs.
Instead of open-coding this, add a helper function to set a 64-bit value
as two 32-bit fields.
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200430182843.2510180-3-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'drivers/firmware/efi/libstub/efistub.h')
| -rw-r--r-- | drivers/firmware/efi/libstub/efistub.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index 5ff63230a1f1..e8aa70ba08d5 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -87,6 +87,13 @@ extern const efi_system_table_t *efi_system_table; ((handle = efi_get_handle_at((array), i)) || true); \ i++) +static inline +void efi_set_u64_split(u64 data, u32 *lo, u32 *hi) +{ + *lo = lower_32_bits(data); + *hi = upper_32_bits(data); +} + /* * Allocation types for calls to boottime->allocate_pages. */ |