From: Andrei Warkentin <andrey.warken...@gmail.com>
Currently some OSes (e.g FreeBSD) can make full use of the maximum
4 GB of RAM a Raspberry Pi 4 can offer, whereas others (e.g. Linux)
must be restricted to only the first 3 GB.
Previously this was a compile-time choice chosen by PcdAcpiBasicMode,
and now we make it user-selectable. The default is a 3 GB limit.
Signed-off-by: Pete Batard <p...@akeo.ie>
---
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 72
+++++++++++++++++---
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf | 8 ++-
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni | 11 +++
Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr | 41 +++++++++++
Platform/RaspberryPi/RPi3/RPi3.dsc | 6 ++
Platform/RaspberryPi/RPi4/RPi4.dsc | 6 ++
Platform/RaspberryPi/RaspberryPi.dec | 4 +-
7 files changed, 134 insertions(+), 14 deletions(-)
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
index 2f48ca0dd758..964ca6d369da 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
@@ -11,11 +11,13 @@
#include <Library/AcpiLib.h>
#include <Library/HiiLib.h>
#include <Library/DebugLib.h>
+#include <Library/DxeServicesTableLib.h>
#include <Library/IoLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/DevicePathLib.h>
#include <IndustryStandard/RpiMbox.h>
+#include <IndustryStandard/Bcm2711.h>
#include <IndustryStandard/Bcm2836.h>
#include <IndustryStandard/Bcm2836Gpio.h>
#include <Library/GpioLib.h>
@@ -26,6 +28,8 @@ extern UINT8 ConfigDxeHiiBin[];
extern UINT8 ConfigDxeStrings[];
STATIC RASPBERRY_PI_FIRMWARE_PROTOCOL *mFwProtocol;
+STATIC UINT32 mModelFamily = 0;
+STATIC UINT32 mModelInstalledMB = 0;
/*
* The GUID inside Platform/RaspberryPi/RPi3/AcpiTables/AcpiTables.inf and
@@ -129,6 +133,24 @@ SetupVariables (
PcdSet32 (PcdCustomCpuClock, PcdGet32 (PcdCustomCpuClock));
}
+ if (mModelFamily >= 4 && mModelInstalledMB > 3 * 1024) {
+ /*
+ * This allows changing PcdRamLimitTo3GB in forms.
+ */
+ PcdSet32 (PcdRamMoreThan3GB, 1);
+
+ Size = sizeof (UINT32);
+ Status = gRT->GetVariable (L"RamLimitTo3GB",
+ &gConfigDxeFormSetGuid,
+ NULL, &Size, &Var32);
+ if (EFI_ERROR (Status)) {
+ PcdSet32 (PcdRamLimitTo3GB, PcdGet32 (PcdRamLimitTo3GB));
+ }
+ } else {
+ PcdSet32 (PcdRamMoreThan3GB, 0);
+ PcdSet32 (PcdRamLimitTo3GB, 0);
+ }
+
Size = sizeof (UINT32);
Status = gRT->GetVariable (L"SdIsArasan",
&gConfigDxeFormSetGuid,
@@ -224,7 +246,7 @@ ApplyVariables (
UINT32 CpuClock = PcdGet32 (PcdCpuClock);
UINT32 CustomCpuClock = PcdGet32 (PcdCustomCpuClock);
UINT32 Rate = 0;
- UINT32 ModelFamily = 0;
+ UINT64 SystemMemorySize;
if (CpuClock != 0) {
if (CpuClock == 2) {
@@ -258,15 +280,31 @@ ApplyVariables (
DEBUG ((DEBUG_INFO, "Current CPU speed is %uHz\n", Rate));
}
- Status = mFwProtocol->GetModelFamily (&ModelFamily);
- if (Status != EFI_SUCCESS) {
- DEBUG ((DEBUG_ERROR, "Couldn't get the Raspberry Pi model family: %r\n",
Status));
- } else {
- DEBUG ((DEBUG_INFO, "Current Raspberry Pi model family is 0x%x\n",
ModelFamily));
+ if (mModelFamily >= 4 && PcdGet32 (PcdRamLimitTo3GB) == 0) {
+ /*
+ * Similar to how we compute the > 3 GB RAM segment's size in PlatformLib/
+ * RaspberryPiMem.c, with some overlap protection for the Bcm2xxx register
+ * spaces. This computation should also work for models with more than 4 GB
+ * RAM, if there ever exist ones.
+ */
+ SystemMemorySize = (UINT64)mModelInstalledMB * SIZE_1MB;
+ ASSERT (SystemMemorySize > 3UL * SIZE_1GB);
+ SystemMemorySize = MIN(SystemMemorySize, BCM2836_SOC_REGISTERS);
+ if (BCM2711_SOC_REGISTERS > 0) {
+ SystemMemorySize = MIN(SystemMemorySize, BCM2711_SOC_REGISTERS);
+ }
+
+ Status = gDS->AddMemorySpace (EfiGcdMemoryTypeSystemMemory, 3UL * BASE_1GB,
+ SystemMemorySize - (3UL * SIZE_1GB),
+ EFI_MEMORY_UC | EFI_MEMORY_WC | EFI_MEMORY_WT |
EFI_MEMORY_WB);
+ ASSERT_EFI_ERROR (Status);
+ Status = gDS->SetMemorySpaceAttributes (3UL * BASE_1GB,
+ SystemMemorySize - (3UL * SIZE_1GB),
+ EFI_MEMORY_WB);
+ ASSERT_EFI_ERROR (Status);
}
-
- if (ModelFamily == 3) {
+ if (mModelFamily == 3) {
/*
* Pi 3: either Arasan or SdHost goes to SD card.
*
@@ -316,7 +354,7 @@ ApplyVariables (
GpioPinFuncSet (52, Gpio48Group);
GpioPinFuncSet (53, Gpio48Group);
- } else if (ModelFamily == 4) {
+ } else if (mModelFamily == 4) {
/*
* Pi 4: either Arasan or eMMC2 goes to SD card.
*/
@@ -352,7 +390,7 @@ ApplyVariables (
GpioPinFuncSet (39, GPIO_FSEL_ALT3);
}
} else {
- DEBUG ((DEBUG_ERROR, "Model Family %d not supported...\n", ModelFamily));
+ DEBUG ((DEBUG_ERROR, "Model Family %d not supported...\n", mModelFamily));
}
/*
@@ -400,6 +438,20 @@ ConfigInitialize (
return Status;
}
+ Status = mFwProtocol->GetModelFamily (&mModelFamily);
+ if (Status != EFI_SUCCESS) {
+ DEBUG ((DEBUG_ERROR, "Couldn't get the Raspberry Pi model family: %r\n",
Status));
+ } else {
+ DEBUG ((DEBUG_INFO, "Current Raspberry Pi model family is %d\n",
mModelFamily));
+ }
+
+ Status = mFwProtocol->GetModelInstalledMB (&mModelInstalledMB);
+ if (Status != EFI_SUCCESS) {
+ DEBUG ((DEBUG_ERROR, "Couldn't get the Raspberry Pi installed RAM size:
%r\n", Status));
+ } else {
+ DEBUG ((DEBUG_INFO, "Current Raspberry Pi installed RAM size is %d MB\n",
mModelInstalledMB));
+ }
+
Status = SetupVariables ();
if (Status != EFI_SUCCESS) {
DEBUG ((DEBUG_ERROR, "Couldn't not setup NV vars: %r\n", Status));
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
index dc726cc6d934..407aac89c7b3 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.inf
@@ -33,6 +33,7 @@ [Packages]
ArmPlatformPkg/ArmPlatformPkg.dec
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
+ Silicon/Broadcom/Bcm27xx/Bcm27xx.dec
Silicon/Broadcom/Bcm283x/Bcm283x.dec
Platform/RaspberryPi/RaspberryPi.dec
EmbeddedPkg/EmbeddedPkg.dec
@@ -53,10 +54,11 @@ [Guids]
gConfigDxeFormSetGuid
[Protocols]
- gRaspberryPiFirmwareProtocolGuid ## CONSUMES
+ gRaspberryPiFirmwareProtocolGuid ## CONSUMES
gRaspberryPiConfigAppliedProtocolGuid ## PRODUCES
[Pcd]
+ gBcm27xxTokenSpaceGuid.PcdBcm27xxRegistersAddress
gBcm283xTokenSpaceGuid.PcdBcm283xRegistersAddress
gRaspberryPiTokenSpaceGuid.PcdCpuClock
gRaspberryPiTokenSpaceGuid.PcdCustomCpuClock
@@ -70,8 +72,8 @@ [Pcd]
gRaspberryPiTokenSpaceGuid.PcdDebugShowUEFIExit
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableScaledVModes
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableSShot
-
-[FeaturePcd]
+ gRaspberryPiTokenSpaceGuid.PcdRamMoreThan3GB
+ gRaspberryPiTokenSpaceGuid.PcdRamLimitTo3GB
[Depex]
gPcdProtocolGuid AND gRaspberryPiFirmwareProtocolGuid
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
index 9b4076635f05..830533a9dc49 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.uni
@@ -35,6 +35,17 @@
#string STR_CHIPSET_SD_SDHOST #language en-US "Broadcom SDHOST"
#string STR_CHIPSET_SD_ARASAN #language en-US "Arasan SDHCI"
+/*
+ * Advanced configuration.
+ */
+
+#string STR_ADVANCED_FORM_TITLE #language en-US "Advanced Configuration"
+
+#string STR_ADVANCED_3GB_PROMPT #language en-US "Limit RAM to 3 GB"
+#string STR_ADVANCED_3GB_HELP #language en-US "OSes not supporting ACPI
DMA constraints require a 3 GB limit or face broken xHCI USB"
+#string STR_ADVANCED_3GB_OFF #language en-US "Disabled"
+#string STR_ADVANCED_3GB_ON #language en-US "Enabled"
+
/*
* MMC/SD configuration.
*/
diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
index 60bfdbd4d17e..483edd7459c5 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxeHii.vfr
@@ -73,6 +73,18 @@ typedef struct {
UINT32 Routing;
} CHIPSET_SD_VARSTORE_DATA;
+typedef struct {
+ /*
+ * Always set by ConfigDxe prior to HII init to reflect
+ * platform capability.
+ */
+ UINT32 Supported;
+} ADVANCED_RAM_MORE_THAN_3GB_VARSTORE_DATA;
+
+typedef struct {
+ UINT32 Enabled;
+} ADVANCED_RAM_LIMIT_TO_3GB_VARSTORE_DATA;
+
typedef struct {
/*
* 0 - Don't disable multi-block.
@@ -140,6 +152,16 @@ formset
name = SdIsArasan,
guid = CONFIGDXE_FORM_SET_GUID;
+ efivarstore ADVANCED_RAM_MORE_THAN_3GB_VARSTORE_DATA,
+ attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+ name = RamMoreThan3GB,
+ guid = CONFIGDXE_FORM_SET_GUID;
+
+ efivarstore ADVANCED_RAM_LIMIT_TO_3GB_VARSTORE_DATA,
+ attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+ name = RamLimitTo3GB,
+ guid = CONFIGDXE_FORM_SET_GUID;
+
efivarstore MMC_DISMULTI_VARSTORE_DATA,
attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
name = MmcDisableMulti,
@@ -193,6 +215,10 @@ formset
prompt = STRING_TOKEN(STR_CHIPSET_FORM_TITLE),
help = STRING_TOKEN(STR_NULL_STRING);
+ goto 0x1006,
+ prompt = STRING_TOKEN(STR_ADVANCED_FORM_TITLE),
+ help = STRING_TOKEN(STR_NULL_STRING);
+
goto 0x1003,
prompt = STRING_TOKEN(STR_MMC_FORM_TITLE),
help = STRING_TOKEN(STR_NULL_STRING);
@@ -240,6 +266,21 @@ formset
endoneof;
endform;
+ form formid = 0x1006,
+ title = STRING_TOKEN(STR_ADVANCED_FORM_TITLE);
+ subtitle text = STRING_TOKEN(STR_NULL_STRING);
+
+ grayoutif ideqval RamMoreThan3GB.Supported == 0;
+ oneof varid = RamLimitTo3GB.Enabled,
+ prompt = STRING_TOKEN(STR_ADVANCED_3GB_PROMPT),
+ help = STRING_TOKEN(STR_ADVANCED_3GB_HELP),
+ flags = NUMERIC_SIZE_4 | INTERACTIVE | RESET_REQUIRED,
+ option text = STRING_TOKEN(STR_ADVANCED_3GB_OFF), value = 0,
flags = DEFAULT;
+ option text = STRING_TOKEN(STR_ADVANCED_3GB_ON), value = 1,
flags = 0;
+ endoneof;
+ endif;
+ endform;
+
form formid = 0x1003,
title = STRING_TOKEN(STR_MMC_FORM_TITLE);
subtitle text = STRING_TOKEN(STR_MMC_FORM_SUBTITLE);
diff --git a/Platform/RaspberryPi/RPi3/RPi3.dsc
b/Platform/RaspberryPi/RPi3/RPi3.dsc
index df5b246af1f8..48e1a32e1d24 100644
--- a/Platform/RaspberryPi/RPi3/RPi3.dsc
+++ b/Platform/RaspberryPi/RPi3/RPi3.dsc
@@ -439,6 +439,12 @@ [PcdsDynamicHii.common.DEFAULT]
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableScaledVModes|L"DisplayEnableScaledVModes"|gConfigDxeFormSetGuid|0x0|0xff
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableSShot|L"DisplayEnableSShot"|gConfigDxeFormSetGuid|0x0|1
+ #
+ # Supporting > 3GB of memory.
+ #
+
gRaspberryPiTokenSpaceGuid.PcdRamMoreThan3GB|L"RamMoreThan3GB"|gConfigDxeFormSetGuid|0x0|0
+
gRaspberryPiTokenSpaceGuid.PcdRamLimitTo3GB|L"RamLimitTo3GB"|gConfigDxeFormSetGuid|0x0|0
+
#
# Common UEFI ones.
#
diff --git a/Platform/RaspberryPi/RPi4/RPi4.dsc
b/Platform/RaspberryPi/RPi4/RPi4.dsc
index 60a5e38da778..3ce2c3e4d519 100644
--- a/Platform/RaspberryPi/RPi4/RPi4.dsc
+++ b/Platform/RaspberryPi/RPi4/RPi4.dsc
@@ -477,6 +477,12 @@ [PcdsDynamicHii.common.DEFAULT]
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableScaledVModes|L"DisplayEnableScaledVModes"|gConfigDxeFormSetGuid|0x0|0xff
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableSShot|L"DisplayEnableSShot"|gConfigDxeFormSetGuid|0x0|1
+ #
+ # Supporting > 3GB of memory.
+ #
+
gRaspberryPiTokenSpaceGuid.PcdRamMoreThan3GB|L"RamMoreThan3GB"|gConfigDxeFormSetGuid|0x0|0
+
gRaspberryPiTokenSpaceGuid.PcdRamLimitTo3GB|L"RamLimitTo3GB"|gConfigDxeFormSetGuid|0x0|1
+
#
# Common UEFI ones.
#
diff --git a/Platform/RaspberryPi/RaspberryPi.dec
b/Platform/RaspberryPi/RaspberryPi.dec
index bc378ffbfb8d..7f2c37ac9a7f 100644
--- a/Platform/RaspberryPi/RaspberryPi.dec
+++ b/Platform/RaspberryPi/RaspberryPi.dec
@@ -57,6 +57,8 @@ [PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic,
PcdsDynamicEx]
gRaspberryPiTokenSpaceGuid.PcdCustomCpuClock|0|UINT32|0x00000016
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableScaledVModes|0|UINT8|0x00000017
gRaspberryPiTokenSpaceGuid.PcdDisplayEnableSShot|0|UINT32|0x00000018
+ gRaspberryPiTokenSpaceGuid.PcdRamMoreThan3GB|0|UINT32|0x00000019
+ gRaspberryPiTokenSpaceGuid.PcdRamLimitTo3GB|0|UINT32|0x0000001A
[PcdsFeatureFlag.common]
- gRaspberryPiTokenSpaceGuid.PcdAcpiBasicMode|FALSE|BOOLEAN|0x00000019
+ gRaspberryPiTokenSpaceGuid.PcdAcpiBasicMode|FALSE|BOOLEAN|0x0000001B
--
2.21.0.windows.1
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