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efi: Add a few comments to the stub

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Comment some functions that need more information.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Simon Glass 2021-12-29 11:57:44 -07:00 committed by Heinrich Schuchardt
parent 9079486461
commit 184be59258
1 changed files with 29 additions and 0 deletions
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29
lib/efi/efi_stub.c
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@ -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)
{