HisiPkg: D01: Move bootwrapper to SRAM

Reserving DDR memory is a very tricky thing to do. We always need to make
sure we don't overlap with memory regions the guest uncondionally uses.

However, we need to keep the bootwrapper code resident in memory for CPU
hotplug. So let's just move it into SRAM. There it can stay happily ever
after.

Unfortunately we need to make sure we only copy the bootwrapper to SRAM,
not a full NAND block. So this patch also introduces a bounce buffer for
NAND access.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Wei Xu <xuwei5@huawei.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/HisiPkg/D01BoardPkg/Bds/BootMenu.c b/HisiPkg/D01BoardPkg/Bds/BootMenu.c
index 4bc9cda82..c5380cb2b 100644
--- a/HisiPkg/D01BoardPkg/Bds/BootMenu.c
+++ b/HisiPkg/D01BoardPkg/Bds/BootMenu.c
@@ -772,14 +772,14 @@ BootLinuxAtagLoader (
 

 EFI_STATUS LoadLinuxAtSecEnd()

 {

-    LinuxEntry entry = (LinuxEntry)(TEXT_DDR_BASE);

+    LinuxEntry entry = (LinuxEntry)(TEXT_SRAM_BASE);

     EFI_STATUS Status = EFI_SUCCESS;

     ArmDisableDataCache();

     ArmCleanInvalidateDataCache();

     ArmDisableInstructionCache ();

     ArmInvalidateInstructionCache ();

     ArmDisableMmu();

-    DEBUG(( EFI_D_ERROR, "MOVE PC TEXT_DDR_BASE\n"));

+    DEBUG(( EFI_D_ERROR, "MOVE PC TEXT_SRAM_BASE\n"));

     (void)entry();

     return Status;

 }

@@ -791,7 +791,7 @@ EFI_STATUS RunBootwrapper()
   *(UINTN*)(UINTN)(0xe302b000 + 0x18) = 0;

   *(UINTN*)(UINTN)(0xe302b000 + 0x1c) = 0;

 

-  *(volatile UINT32 *)(0xe0000000 + 0x100) = TEXT_DDR_BASE;

+  *(volatile UINT32 *)(0xe0000000 + 0x100) = TEXT_SRAM_BASE;

 

   ArmCleanDataCache();

   *(UINT8*)(0xf4007000) = 'G';