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4 Commits

Author SHA1 Message Date
Gerd Hoffmann 0395045ae3 OvmfPkg/VirtNorFlashDxe: add casts to UINTN and UINT32 
This is needed to avoid bit operations being applied to signed integers.

Suggested-by: László Érsek <lersek@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20240116171105.37831-2-kraxel@redhat.com>
 2024-01-18 19:25:14 +00:00
Ard Biesheuvel 83f11f9572 OvmfPkg/VirtNorFlashDxe: drop block I/O protocol implementation 
We never boot from NOR flash, and generally rely on the firmware volume
PI protocols to expose the contents. So drop the block I/O protocol
implementation from VirtNorFlashDxe.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
 2022-10-27 16:52:01 +00:00
Ard Biesheuvel 68d234989b OvmfPkg/VirtNorFlashDxe: remove disk I/O protocol implementation 
We only use NOR flash for firmware volumes, either for executable images
or for the variable store. So we have no need for exposing disk I/O on
top of the NOR flash partitions so let's remove it.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
 2022-10-27 16:52:01 +00:00
Ard Biesheuvel c1ff81f799 OvmfPkg/VirtNorFlashDxe: clone ArmPlatformPkg's NOR flash driver 
QEMU's mach-virt is loosely based on ARM Versatile Express, and inherits
its NOR flash driver, which is now being used on other QEMU emulated
architectures as well.

In order to permit ourselves the freedom to optimize this driver for
use under KVM emulation, let's clone it into OvmfPkg, so we have a
version we can hack without the risk of regressing bare metal platforms.

The cloned version is mostly identical to the original, but it depends
on the newly added VirtNorFlashPlatformLib library class instead of the
original one from ArmPlatformPkg. Beyond that, only cosmetic changes
related to #include order etc were made.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
 2022-10-27 16:52:01 +00:00