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efi_loader: fix description of memory functions

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* Add missing function descriptions
* Adjust to Sphinx style

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Heinrich Schuchardt 2023-01-08 01:00:00 +01:00
parent e9cc7029e8
commit 0763c02eee
1 changed files with 62 additions and 20 deletions
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82
lib/efi_loader/efi_memory.c
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@ -78,12 +78,19 @@ static u64 checksum(struct efi_pool_allocation *alloc)
return ret;
}
/*
/**
* efi_mem_cmp() - comparator function for sorting memory map
*
* Sorts the memory list from highest address to lowest address
*
* When allocating memory we should always start from the highest
* address chunk, so sort the memory list such that the first list
* iterator gets the highest address and goes lower from there.
*
* @priv: unused
* @a: first memory area
* @b: second memory area
* Return: 1 if @a is before @b, -1 if @b is before @a, 0 if equal
*/
static int efi_mem_cmp(void *priv, struct list_head *a, struct list_head *b)
{
@ -98,11 +105,22 @@ static int efi_mem_cmp(void *priv, struct list_head *a, struct list_head *b)
return -1;
}
/**
* desc_get_end() - get end address of memory area
*
* @desc: memory descriptor
* Return: end address + 1
*/
static uint64_t desc_get_end(struct efi_mem_desc *desc)
{
return desc->physical_start + (desc->num_pages << EFI_PAGE_SHIFT);
}
/**
* efi_mem_sort() - sort memory map
*
* Sort the memory map and then try to merge adjacent memory areas.
*/
static void efi_mem_sort(void)
{
struct list_head *lhandle;
@ -148,12 +166,13 @@ static void efi_mem_sort(void)
}
}
/** efi_mem_carve_out - unmap memory region
/**
* efi_mem_carve_out() - unmap memory region
*
* @map: memory map
* @carve_desc: memory region to unmap
* @overlap_only_ram: the carved out region may only overlap RAM
* Return Value: the number of overlapping pages which have been
* Return: the number of overlapping pages which have been
* removed from the map,
* EFI_CARVE_NO_OVERLAP, if the regions don't overlap,
* EFI_CARVE_OVERLAPS_NONRAM, if the carve and map overlap,
@ -403,6 +422,13 @@ static efi_status_t efi_check_allocated(u64 addr, bool must_be_allocated)
return EFI_NOT_FOUND;
}
/**
* efi_find_free_memory() - find free memory pages
*
* @len: size of memory area needed
* @max_addr: highest address to allocate
* Return: pointer to free memory area or 0
*/
static uint64_t efi_find_free_memory(uint64_t len, uint64_t max_addr)
{
struct list_head *lhandle;
@ -445,13 +471,13 @@ static uint64_t efi_find_free_memory(uint64_t len, uint64_t max_addr)
return 0;
}
/*
* Allocate memory pages.
/**
* efi_allocate_pages - allocate memory pages
*
* @type type of allocation to be performed
* @memory_type usage type of the allocated memory
* @pages number of pages to be allocated
* @memory allocated memory
* @type: type of allocation to be performed
* @memory_type: usage type of the allocated memory
* @pages: number of pages to be allocated
* @memory: allocated memory
* Return: status code
*/
efi_status_t efi_allocate_pages(enum efi_allocate_type type,
@ -507,6 +533,13 @@ efi_status_t efi_allocate_pages(enum efi_allocate_type type,
return EFI_SUCCESS;
}
/**
* efi_alloc() - allocate memory pages
*
* @len: size of the memory to be allocated
* @memory_type: usage type of the allocated memory
* Return: pointer to the allocated memory area or NULL
*/
void *efi_alloc(uint64_t len, int memory_type)
{
uint64_t ret = 0;
@ -552,7 +585,7 @@ efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages)
}
/**
* efi_alloc_aligned_pages - allocate
* efi_alloc_aligned_pages() - allocate aligned memory pages
*
* @len: len in bytes
* @memory_type: usage type of the allocated memory
@ -673,15 +706,15 @@ efi_status_t efi_free_pool(void *buffer)
return ret;
}
/*
* Get map describing memory usage.
/**
* efi_get_memory_map() - get map describing memory usage.
*
* @memory_map_size on entry the size, in bytes, of the memory map buffer,
* @memory_map_size: on entry the size, in bytes, of the memory map buffer,
* on exit the size of the copied memory map
* @memory_map buffer to which the memory map is written
* @map_key key for the memory map
* @descriptor_size size of an individual memory descriptor
* @descriptor_version version number of the memory descriptor structure
* @memory_map: buffer to which the memory map is written
* @map_key: key for the memory map
* @descriptor_size: size of an individual memory descriptor
* @descriptor_version: version number of the memory descriptor structure
* Return: status code
*/
efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
@ -741,8 +774,8 @@ efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
*
* The caller is responsible for calling FreePool() if the call succeeds.
*
* @memory_map buffer to which the memory map is written
* @map_size size of the memory map
* @map_size: size of the memory map
* @memory_map: buffer to which the memory map is written
* Return: status code
*/
efi_status_t efi_get_memory_map_alloc(efi_uintn_t *map_size,
@ -818,6 +851,11 @@ efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
return EFI_SUCCESS;
}
/**
* efi_add_known_memory() - add memory banks to map
*
* This function may be overridden for specific architectures.
*/
__weak void efi_add_known_memory(void)
{
u64 ram_top = board_get_usable_ram_top(0) & ~EFI_PAGE_MASK;
@ -844,7 +882,11 @@ __weak void efi_add_known_memory(void)
}
}
/* Add memory regions for U-Boot's memory and for the runtime services code */
/**
* add_u_boot_and_runtime() - add U-Boot code to memory map
*
* Add memory regions for U-Boot's memory and for the runtime services code.
*/
static void add_u_boot_and_runtime(void)
{
unsigned long runtime_start, runtime_end, runtime_pages;