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efi_loader: Extract adding a conventional memory in separate routine

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Adding a conventional memory region to the memory map may require ram_top
limitation and it can be also commonly used. Extract adding a conventional
memory to the memory map in a separate routine for generic use.

Signed-off-by: Aiden Park <aiden.park@intel.com>
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Park, Aiden 2019-09-03 17:43:43 +00:00 committed by Heinrich Schuchardt
parent 5b4746fd6b
commit b5b9eff26d
2 changed files with 54 additions and 32 deletions
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4
include/efi_loader.h
View File

@ -478,6 +478,10 @@ efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
/* Adds a range into the EFI memory map */
efi_status_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
bool overlap_only_ram);
/* Adds a conventional range into the EFI memory map */
efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
u64 ram_top);
/* Called by board init to initialize the EFI drivers */
efi_status_t efi_driver_init(void);
/* Called by board init to initialize the EFI memory map */

82
lib/efi_loader/efi_memory.c
View File

@ -655,6 +655,54 @@ efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
return EFI_SUCCESS;
}
/**
* efi_add_conventional_memory_map() - add a RAM memory area to the map
*
* @ram_start: start address of a RAM memory area
* @ram_end: end address of a RAM memory area
* @ram_top: max address to be used as conventional memory
* Return: status code
*/
efi_status_t efi_add_conventional_memory_map(u64 ram_start, u64 ram_end,
u64 ram_top)
{
u64 pages;
/* Remove partial pages */
ram_end &= ~EFI_PAGE_MASK;
ram_start = (ram_start + EFI_PAGE_MASK) & ~EFI_PAGE_MASK;
if (ram_end <= ram_start) {
/* Invalid mapping */
return EFI_INVALID_PARAMETER;
}
pages = (ram_end - ram_start) >> EFI_PAGE_SHIFT;
efi_add_memory_map(ram_start, pages,
EFI_CONVENTIONAL_MEMORY, false);
/*
* Boards may indicate to the U-Boot memory core that they
* can not support memory above ram_top. Let's honor this
* in the efi_loader subsystem too by declaring any memory
* above ram_top as "already occupied by firmware".
*/
if (ram_top < ram_start) {
/* ram_top is before this region, reserve all */
efi_add_memory_map(ram_start, pages,
EFI_BOOT_SERVICES_DATA, true);
} else if ((ram_top >= ram_start) && (ram_top < ram_end)) {
/* ram_top is inside this region, reserve parts */
pages = (ram_end - ram_top) >> EFI_PAGE_SHIFT;
efi_add_memory_map(ram_top, pages,
EFI_BOOT_SERVICES_DATA, true);
}
return EFI_SUCCESS;
}
__weak void efi_add_known_memory(void)
{
u64 ram_top = board_get_usable_ram_top(0) & ~EFI_PAGE_MASK;
@ -672,42 +720,12 @@ __weak void efi_add_known_memory(void)
/* Add RAM */
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
u64 ram_end, ram_start, pages;
u64 ram_end, ram_start;
ram_start = (uintptr_t)map_sysmem(gd->bd->bi_dram[i].start, 0);
ram_end = ram_start + gd->bd->bi_dram[i].size;
/* Remove partial pages */
ram_end &= ~EFI_PAGE_MASK;
ram_start = (ram_start + EFI_PAGE_MASK) & ~EFI_PAGE_MASK;
if (ram_end <= ram_start) {
/* Invalid mapping, keep going. */
continue;
}
pages = (ram_end - ram_start) >> EFI_PAGE_SHIFT;
efi_add_memory_map(ram_start, pages,
EFI_CONVENTIONAL_MEMORY, false);
/*
* Boards may indicate to the U-Boot memory core that they
* can not support memory above ram_top. Let's honor this
* in the efi_loader subsystem too by declaring any memory
* above ram_top as "already occupied by firmware".
*/
if (ram_top < ram_start) {
/* ram_top is before this region, reserve all */
efi_add_memory_map(ram_start, pages,
EFI_BOOT_SERVICES_DATA, true);
} else if ((ram_top >= ram_start) && (ram_top < ram_end)) {
/* ram_top is inside this region, reserve parts */
pages = (ram_end - ram_top) >> EFI_PAGE_SHIFT;
efi_add_memory_map(ram_top, pages,
EFI_BOOT_SERVICES_DATA, true);
}
efi_add_conventional_memory_map(ram_start, ram_end, ram_top);
}
}