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ArmVirtPkg: store separate console and debug PL011 addresses in GUID HOB

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PlatformPeiLib produces the EarlyPL011BaseAddress GUID HOB, and
FdtPL011SerialPortLib consumes it. Extend the HOB such that it also carry
the base address of the PL011 UART meant for DebugLib usage -- namely the
first UART that is *not* designated by the /chosen node's "stdout-path"
property. Implement this policy in PlatformPeiLib.

Note that as far as the SerialPortLib+console UART is concerned, this
patch makes no difference. That selection remains consistent with the
pre-patch state, and therefore consistent with EarlyFdtPL011SerialPortLib.

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20231008153912.175941-6-lersek@redhat.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=4577
[lersek@redhat.com: add TianoCore BZ reference]
This commit is contained in:
Laszlo Ersek
2023-10-08 17:39:08 +02:00
committed by mergify[bot]
parent 66046aeb6d
commit 115b59d9c6
4 changed files with 61 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c
View File

@@ -9,6 +9,7 @@
#include <PiPei.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
@@ -43,7 +44,7 @@ PlatformPeim (
UINTN FdtSize;
UINTN FdtPages;
UINT64 *FdtHobData;
UINT64 *UartHobData;
EARLY_PL011_BASE_ADDRESS *UartHobData;
FDT_SERIAL_PORTS Ports;
INT32 Node, Prev;
INT32 Parent, Depth;
@@ -72,24 +73,55 @@ PlatformPeim (
UartHobData = BuildGuidHob (&gEarlyPL011BaseAddressGuid, sizeof *UartHobData);
ASSERT (UartHobData != NULL);
*UartHobData = 0;
SetMem (UartHobData, sizeof *UartHobData, 0);
Status = FdtSerialGetPorts (Base, "arm,pl011", &Ports);
if (!EFI_ERROR (Status)) {
UINT64 UartBase;
if (Ports.NumberOfPorts == 1) {
//
// Just one UART; direct both SerialPortLib+console and DebugLib to it.
//
UartHobData->ConsoleAddress = Ports.BaseAddress[0];
UartHobData->DebugAddress = Ports.BaseAddress[0];
} else {
UINT64 ConsoleAddress;
//
// Default to the first port found, but (if there are multiple ports) allow
// the "/chosen" node to override it. Note that if FdtSerialGetConsolePort()
// fails, it does not modify UartBase.
//
UartBase = Ports.BaseAddress[0];
if (Ports.NumberOfPorts > 1) {
FdtSerialGetConsolePort (Base, &UartBase);
Status = FdtSerialGetConsolePort (Base, &ConsoleAddress);
if (EFI_ERROR (Status)) {
//
// At least two UARTs; but failed to get the console preference. Use the
// first UART for SerialPortLib+console, and the second one for
// DebugLib.
//
UartHobData->ConsoleAddress = Ports.BaseAddress[0];
UartHobData->DebugAddress = Ports.BaseAddress[1];
} else {
//
// At least two UARTs; and console preference available. Use the
// preferred UART for SerialPortLib+console, and *another* UART for
// DebugLib.
//
UartHobData->ConsoleAddress = ConsoleAddress;
if (ConsoleAddress == Ports.BaseAddress[0]) {
UartHobData->DebugAddress = Ports.BaseAddress[1];
} else {
UartHobData->DebugAddress = Ports.BaseAddress[0];
}
}
}
DEBUG ((DEBUG_INFO, "%a: PL011 UART @ 0x%lx\n", __func__, UartBase));
*UartHobData = UartBase;
DEBUG ((
DEBUG_INFO,
"%a: PL011 UART (console) @ 0x%lx\n",
__func__,
UartHobData->ConsoleAddress
));
DEBUG ((
DEBUG_INFO,
"%a: PL011 UART (debug) @ 0x%lx\n",
__func__,
UartHobData->DebugAddress
));
}
TpmBase = 0;