diff options
| author | Simon Glass | 2021-12-29 11:57:44 -0700 |
|---|---|---|
| committer | Heinrich Schuchardt | 2021-12-31 06:45:01 +0100 |
| commit | 184be592580178dd149800459c8817199160ca22 (patch) | |
| tree | 485af892153fed74be34057e825bd105ea785d45 /lib/efi | |
| parent | 9079486461c369df3f5a1d8bfb5003f8769554dc (diff) | |
efi: Add a few comments to the stub
Comment some functions that need more information.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Diffstat (limited to 'lib/efi')
| -rw-r--r-- | lib/efi/efi_stub.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/efi/efi_stub.c b/lib/efi/efi_stub.c index b3393e47fae..31f1e1a72a1 100644 --- a/lib/efi/efi_stub.c +++ b/lib/efi/efi_stub.c @@ -225,6 +225,22 @@ static int get_codeseg32(void) return cs32; } +/** + * setup_info_table() - sets up a table containing information from EFI + * + * We must call exit_boot_services() before jumping out of the stub into U-Boot + * proper, so that U-Boot has full control of peripherals, memory, etc. + * + * Once we do this, we cannot call any boot-services functions so we must find + * out everything we need to before doing that. + * + * Set up a struct efi_info_hdr table which can hold various records (e.g. + * struct efi_entry_memmap) with information obtained from EFI. + * + * @priv: Pointer to our private information which contains the list + * @size: Size of the table to allocate + * Return: 0 if OK, non-zero on error + */ static int setup_info_table(struct efi_priv *priv, int size) { struct efi_info_hdr *info; @@ -248,6 +264,19 @@ static int setup_info_table(struct efi_priv *priv, int size) return 0; } +/** + * add_entry_addr() - Add a new entry to the efi_info list + * + * This adds an entry, consisting of a tag and two lots of data. This avoids the + * caller having to coalesce the data first + * + * @priv: Pointer to our private information which contains the list + * @type: Type of the entry to add + * @ptr1: Pointer to first data block to add + * @size1: Size of first data block in bytes (can be 0) + * @ptr2: Pointer to second data block to add + * @size2: Size of second data block in bytes (can be 0) + */ static void add_entry_addr(struct efi_priv *priv, enum efi_entry_t type, void *ptr1, int size1, void *ptr2, int size2) { |