diff options
Diffstat (limited to 'drivers/firmware/efi/libstub/arm32-stub.c')
| -rw-r--r-- | drivers/firmware/efi/libstub/arm32-stub.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c index 6f42be4d0084..e1f0b28e1dcb 100644 --- a/drivers/firmware/efi/libstub/arm32-stub.c +++ b/drivers/firmware/efi/libstub/arm32-stub.c @@ -26,6 +26,43 @@ efi_status_t check_platform_features(efi_system_table_t *sys_table_arg) return EFI_SUCCESS; } +static efi_guid_t screen_info_guid = LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID; + +struct screen_info *alloc_screen_info(efi_system_table_t *sys_table_arg) +{ + struct screen_info *si; + efi_status_t status; + + /* + * Unlike on arm64, where we can directly fill out the screen_info + * structure from the stub, we need to allocate a buffer to hold + * its contents while we hand over to the kernel proper from the + * decompressor. + */ + status = efi_call_early(allocate_pool, EFI_RUNTIME_SERVICES_DATA, + sizeof(*si), (void **)&si); + + if (status != EFI_SUCCESS) + return NULL; + + status = efi_call_early(install_configuration_table, + &screen_info_guid, si); + if (status == EFI_SUCCESS) + return si; + + efi_call_early(free_pool, si); + return NULL; +} + +void free_screen_info(efi_system_table_t *sys_table_arg, struct screen_info *si) +{ + if (!si) + return; + + efi_call_early(install_configuration_table, &screen_info_guid, NULL); + efi_call_early(free_pool, si); +} + efi_status_t handle_kernel_image(efi_system_table_t *sys_table, unsigned long *image_addr, unsigned long *image_size, |