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aarch64: Add a memory-simulated flash for UEFI

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EDK2 execution requires a flash device at address 0.

The new added device is not a fully functional flash. It doesn't
implement any spec of a flash device. Instead, a piece of memory is used
to simulate the flash simply.

Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This commit is contained in:
Michael Zhao
2022-04-05 10:52:22 +08:00
committed by Rob Bradford
parent 9dd107bb03
commit d1b2a3fca9
3 changed files with 56 additions and 3 deletions
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6
arch/src/aarch64/layout.rs
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@@ -42,11 +42,11 @@
// | Legacy devices space |
// | |
// 144 M +---------------------------------------------------------------|
// | |
// | Reserved (now GIC is here) |
// 64 M +---------------------------------------------------------------+
// | |
// | UEFI space |
// | |
// 4 M +---------------------------------------------------------------+
// | UEFI flash |
// 0GB +---------------------------------------------------------------+
//
//