diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-12-07 12:01:25 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-12-20 11:02:40 +0100 |
| commit | 4a1500db2b42d08e41cea6b84ef2fc8a04a37edd (patch) | |
| tree | 2dc5d4738aae3cacf41aebb0dbc1d23fdf21a75c /ArmVirtPkg | |
| parent | 6bd42402f70ba0db9161fc59301b60ee82ba1c09 (diff) | |
| download | edk2-4a1500db2b42d08e41cea6b84ef2fc8a04a37edd.tar.gz | |
ArmVirtPkg/MemoryInitPeiLib: split memory HOB based on MAX_ALLOC_ADDRESS
The current ArmVirtMemoryInitPeiLib code splits the memory region passed
via PcdSystemMemoryBase/PcdSystemMemorySize in two if the region extends
beyond the MAX_ADDRESS limit. This was introduced for 32-bit ARM, which
may support more than 4 GB of physical address space, but cannot address
all of it via a 1:1 mapping, and a single region that is not mappable
in its entirety is unusable by the PEI core.
AArch64 is in a similar situation now: platforms may support more than
256 TB of physical address space, but only 256 TB is addressable by the
CPU, and so a memory region that extends from below this limit to above
it should be split.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'ArmVirtPkg')
| -rw-r--r-- | ArmVirtPkg/Library/ArmVirtMemoryInitPeiLib/ArmVirtMemoryInitPeiLib.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/ArmVirtPkg/Library/ArmVirtMemoryInitPeiLib/ArmVirtMemoryInitPeiLib.c b/ArmVirtPkg/Library/ArmVirtMemoryInitPeiLib/ArmVirtMemoryInitPeiLib.c index 05afd12824..66925fc05e 100644 --- a/ArmVirtPkg/Library/ArmVirtMemoryInitPeiLib/ArmVirtMemoryInitPeiLib.c +++ b/ArmVirtPkg/Library/ArmVirtMemoryInitPeiLib/ArmVirtMemoryInitPeiLib.c @@ -75,18 +75,18 @@ MemoryPeim ( SystemMemoryTop = PcdGet64 (PcdSystemMemoryBase) +
PcdGet64 (PcdSystemMemorySize);
- if (SystemMemoryTop - 1 > MAX_ADDRESS) {
+ if (SystemMemoryTop - 1 > MAX_ALLOC_ADDRESS) {
BuildResourceDescriptorHob (
EFI_RESOURCE_SYSTEM_MEMORY,
ResourceAttributes,
PcdGet64 (PcdSystemMemoryBase),
- (UINT64)MAX_ADDRESS - PcdGet64 (PcdSystemMemoryBase) + 1
+ (UINT64)MAX_ALLOC_ADDRESS - PcdGet64 (PcdSystemMemoryBase) + 1
);
BuildResourceDescriptorHob (
EFI_RESOURCE_SYSTEM_MEMORY,
ResourceAttributes,
- (UINT64)MAX_ADDRESS + 1,
- SystemMemoryTop - MAX_ADDRESS - 1
+ (UINT64)MAX_ALLOC_ADDRESS + 1,
+ SystemMemoryTop - MAX_ALLOC_ADDRESS - 1
);
} else {
BuildResourceDescriptorHob (
|