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5dc6f19b38
There was a wild pointer in Fdt16550SerialProtHookLib which pointed to an unknown space, which was very wrong and has been fixed. Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Chao Li <lichao@loongson.cn>
39 lines
981 B
C
39 lines
981 B
C
/** @file
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Platform Hook Library instance for 16550 Uart.
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Copyright (c) 2020, ARM Ltd. All rights reserved.<BR>
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Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h>
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#include <Library/PcdLib.h>
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#include <Register/LoongArch64/Csr.h>
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/** Platform hook to retrieve the 16550 UART base address from register
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LOONGARCH_CSR_KS1 that caches the UART base address from early boot
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stage and store it in PcdSerialRegisterBase.
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@retval RETURN_SUCCESS Success.
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@retval RETURN_NOT_FOUND Serial Port information not found.
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**/
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RETURN_STATUS
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EFIAPI
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PlatformHookSerialPortInitialize (
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VOID
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)
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{
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UINT64 UartBase;
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if (PcdGet64 (PcdSerialRegisterBase) != 0) {
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return RETURN_SUCCESS;
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}
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UartBase = CsrRead (LOONGARCH_CSR_KS1);
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return (RETURN_STATUS)PcdSet64S (PcdSerialRegisterBase, (UINTN)UartBase);
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}
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