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Diffstat (limited to 'documentation/UEFI_from_spec/EFI_MEMORY_DESCRIPTOR')
| -rw-r--r-- | documentation/UEFI_from_spec/EFI_MEMORY_DESCRIPTOR | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/documentation/UEFI_from_spec/EFI_MEMORY_DESCRIPTOR b/documentation/UEFI_from_spec/EFI_MEMORY_DESCRIPTOR deleted file mode 100644 index 72e8cc9..0000000 --- a/documentation/UEFI_from_spec/EFI_MEMORY_DESCRIPTOR +++ /dev/null @@ -1,60 +0,0 @@ -typedef struct { - UINT32 Type; - EFI_PHYSICAL_ADDRESS PhysicalStart; - EFI_VIRTUAL_ADDRESS VirtualStart; - UINT64 NumberOfPages; - UINT64 Attribute; -} EFI_MEMORY_DESCRIPTOR; - - -Type Type of the memory region. Type EFI_MEMORY_TYPE is defined in the AllocatePages() function description. -PhysicalStart Physical address of the first byte in the memory region. Physical start must be aligned on a 4 KB boundary. - -VirtualStart Virtual address of the first byte in the memory region. Virtual start must be aligned on a 4 KB boundary. NumberOfPages Number of 4 KB pages in the memory region. -Attribute Attributes of the memory region that describe the bit mask of capabilities for that memory region, and not - necessarily the current settings for that memory region. - - - -//******************************************************* -// Memory Attribute Definitions -//******************************************************* -// These types can be “ORed” together as needed. -#define EFI_MEMORY_UC 0x0000000000000001 -#define EFI_MEMORY_WC 0x0000000000000002 -#define EFI_MEMORY_WT 0x0000000000000004 -#define EFI_MEMORY_WB 0x0000000000000008 -#define EFI_MEMORY_UCE 0x0000000000000010 -#define EFI_MEMORY_WP 0x0000000000001000 -#define EFI_MEMORY_RP 0x0000000000002000 -#define EFI_MEMORY_XP 0x0000000000004000 -#define EFI_MEMORY_RUNTIME 0x8000000000000000 - -EFI_MEMORY_UC Memory cacheability attribute: The memory region supports being configured as not cacheable. -EFI_MEMORY_WC Memory cacheability attribute: The memory region supports being configured as write combining. -EFI_MEMORY_WT Memory cacheability attribute: The memory region supports being configured as cacheable with - a “write through” policy. Writes that hit in the cache will also be written to main memory. -EFI_MEMORY_WB Memory cacheability attribute: The memory region supports being configured as cacheable with - a “write back” policy. Reads and writes that hit in the cache do not propagate to main memory. - Dirty data is written back to main memory when a new cache line is allocated. -EFI_MEMORY_UCE Memory cacheability attribute: The memory region supports being configured as not cacheable, - exported, and supports the “fetch and add” semaphore mechanism. -EFI_MEMORY_WP Physical memory protection attribute: The memory region supports being configured as - write-protected by system hardware. -EFI_MEMORY_RP Physical memory protection attribute: The memory region supports being configured as - read-protected by system hardware. -EFI_MEMORY_XP Physical memory protection attribute: The memory region supports being configured so it is - protected by system hardware from executing code. -EFI_MEMORY_RUNTIME Runtime memory attribute: The memory region needs to be given a virtual mapping by the - operating system when SetVirtualAddressMap() is called (described in Chapter 7.3.) - - -//******************************************************* -//EFI_VIRTUAL_ADDRESS -//******************************************************* -typedef UINT64 -EFI_VIRTUAL_ADDRESS; -//******************************************************* -// Memory Descriptor Version Number -//******************************************************* -#define EFI_MEMORY_DESCRIPTOR_VERSION 1 |