[edk2-devel] [edk2-platforms][PATCH v2 08/14] RISC-V/PlatformPkg: Build DeviceTree and use that in SEC
Daniel Schaefer
daniel.schaefer at hpe.com
Wed Oct 6 11:56:46 UTC 2021
OpenSBI uses the device tree for platform specific initialization, so we
need to have it already in SEC.
Cc: Daniel Schaefer <daniel.schaefer at hpe.com>
Cc: Abner Chang <abner.chang at hpe.com>
Cc: Sunil V L <sunilvl at ventanamicro.com>
Signed-off-by: Daniel Schaefer <daniel.schaefer at hpe.com>
---
Platform/RISC-V/PlatformPkg/RiscVPlatformPkg.dec | 4 ++
Platform/RISC-V/PlatformPkg/Universal/Sec/Riscv64/SecEntry.S | 22 ---------
Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.c | 49 ++++++++++++++++++++
Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.inf | 2 +
Silicon/RISC-V/ProcessorPkg/Include/IndustryStandard/RiscVOpensbi.h | 1 +
5 files changed, 56 insertions(+), 22 deletions(-)
diff --git a/Platform/RISC-V/PlatformPkg/RiscVPlatformPkg.dec b/Platform/RISC-V/PlatformPkg/RiscVPlatformPkg.dec
index 48aeb97431..ad15a155fe 100644
--- a/Platform/RISC-V/PlatformPkg/RiscVPlatformPkg.dec
+++ b/Platform/RISC-V/PlatformPkg/RiscVPlatformPkg.dec
@@ -31,6 +31,8 @@
gUefiRiscVPlatformPkgTokenSpaceGuid.PcdRiscVPeiFvSize|0x0|UINT32|0x00001003
gUefiRiscVPlatformPkgTokenSpaceGuid.PcdRiscVDxeFvBase|0x0|UINT32|0x00001004
gUefiRiscVPlatformPkgTokenSpaceGuid.PcdRiscVDxeFvSize|0x0|UINT32|0x00001005
+ gUefiRiscVPlatformPkgTokenSpaceGuid.PcdRiscVDtbFvBase|0x0|UINT32|0x00001016
+ gUefiRiscVPlatformPkgTokenSpaceGuid.PcdRiscVDtbFvSize|0x0|UINT32|0x00001017
#
# Definition of EFI Variable region
@@ -66,6 +68,8 @@
gUefiRiscVPlatformPkgTokenSpaceGuid.PcdTemporaryRamSize|0|UINT32|0x00001104
gUefiRiscVPlatformPkgTokenSpaceGuid.PcdPeiCorePrivilegeMode|0|UINT32|0x00001105
+ gUefiRiscVPlatformPkgTokenSpaceGuid.PcdDeviceTreeAddress|0|UINT32|0x00001106
+
[PcdsPatchableInModule]
[PcdsFeatureFlag]
diff --git a/Platform/RISC-V/PlatformPkg/Universal/Sec/Riscv64/SecEntry.S b/Platform/RISC-V/PlatformPkg/Universal/Sec/Riscv64/SecEntry.S
index 8434d1a4e0..0e3940180d 100644
--- a/Platform/RISC-V/PlatformPkg/Universal/Sec/Riscv64/SecEntry.S
+++ b/Platform/RISC-V/PlatformPkg/Universal/Sec/Riscv64/SecEntry.S
@@ -75,11 +75,6 @@ _scratch_init:
sd a4, SBI_SCRATCH_FW_START_OFFSET(tp)
sd a5, SBI_SCRATCH_FW_SIZE_OFFSET(tp)
- /*
- * Note: fw_next_arg1() uses a0, a1, and ra
- */
- call fw_next_arg1
- sd a0, SBI_SCRATCH_NEXT_ARG1_OFFSET(tp) /* Save agr1 in scratch buffer*/
/*
Note: fw_next_addr()uses a0, a1, and ra
*/
@@ -500,23 +495,6 @@ _reset_regs:
csrw CSR_MSCRATCH, 0
ret
- .align 3
- .section .entry, "ax", %progbits
- .global fw_prev_arg1
-fw_prev_arg1:
-
- /* We return previous arg1 in 'a0' */
- add a0, zero, zero
- ret
-
- .align 3
- .section .entry, "ax", %progbits
- .global fw_next_arg1
-fw_next_arg1:
- /* We return next arg1 in 'a0' */
- li a0, FixedPcdGet32(PcdRiscVPeiFvBase)
- ret
-
.align 3
.section .entry, "ax", %progbits
.global fw_next_addr
diff --git a/Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.c b/Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.c
index fa9ecd789a..0af0b4bac8 100644
--- a/Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.c
+++ b/Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.c
@@ -557,6 +557,12 @@ VOID EFIAPI PeiCore (
&FirmwareContext
));
ThisSbiPlatform->firmware_context = (unsigned long)&FirmwareContext;
+
+ //
+ // Save Flattened Device tree in firmware context
+ //
+ FirmwareContext.FlattenedDeviceTree = FuncArg1;
+
//
// Set firmware context Hart-specific pointer
//
@@ -647,6 +653,42 @@ RiscVOpenSbiHartSwitchMode (
sbi_hart_switch_mode(FuncArg0, FuncArg1, NextAddr, NextMode, NextVirt);
}
+/**
+ Get device tree address
+
+ @retval The address of Device Tree binary.
+**/
+VOID *
+EFIAPI
+GetDeviceTreeAddress (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ EFI_COMMON_SECTION_HEADER *FoundSection;
+
+ if (FixedPcdGet32 (PcdDeviceTreeAddress)) {
+ return (VOID *)*((unsigned long *)FixedPcdGet32 (PcdDeviceTreeAddress));
+ } else if (FixedPcdGet32 (PcdRiscVDtbFvBase)) {
+ Status = FindFfsFileAndSection (
+ (EFI_FIRMWARE_VOLUME_HEADER *)FixedPcdGet32 (PcdRiscVDtbFvBase),
+ EFI_FV_FILETYPE_FREEFORM,
+ EFI_SECTION_RAW,
+ &FoundSection
+ );
+ if (EFI_ERROR(Status)) {
+ DEBUG ((DEBUG_ERROR, "Platform Device Tree is not found from FV.\n"));
+ return NULL;
+ }
+ FoundSection ++;
+ return (VOID *)FoundSection;
+ } else {
+ DEBUG ((DEBUG_ERROR, "Must use DTB either from memory or compiled in FW. PCDs configured incorrectly.\n"));
+ ASSERT (FALSE);
+ }
+ return NULL;
+}
+
/**
This function initilizes hart specific information and SBI.
For the boot hart, it boots system through PEI core and initial SBI in the DXE IPL.
@@ -686,6 +728,13 @@ VOID EFIAPI SecCoreStartUpWithStack(
UINT64 NonBootHartMessageLockValue;
EFI_RISCV_FIRMWARE_CONTEXT_HART_SPECIFIC *HartFirmwareContext;
+ Scratch->next_arg1 = (unsigned long)GetDeviceTreeAddress ();
+ if (Scratch->next_arg1 == (unsigned long)NULL) {
+ DEBUG ((DEBUG_ERROR, "Platform Device Tree is not found\n"));
+ ASSERT (FALSE);
+ }
+ DEBUG ((DEBUG_INFO, "DTB address: 0x%08x\n", Scratch->next_arg1));
+
//
// Setup EFI_RISCV_FIRMWARE_CONTEXT_HART_SPECIFIC for each hart.
//
diff --git a/Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.inf b/Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.inf
index 89bcb039a6..78bd75e3ac 100644
--- a/Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.inf
+++ b/Platform/RISC-V/PlatformPkg/Universal/Sec/SecMain.inf
@@ -57,6 +57,8 @@
[FixedPcd]
gUefiRiscVPlatformPkgTokenSpaceGuid.PcdRiscVPeiFvBase
gUefiRiscVPlatformPkgTokenSpaceGuid.PcdRiscVPeiFvSize
+ gUefiRiscVPlatformPkgTokenSpaceGuid.PcdRiscVDtbFvBase
+ gUefiRiscVPlatformPkgTokenSpaceGuid.PcdDeviceTreeAddress
[Pcd]
gUefiRiscVPlatformPkgTokenSpaceGuid.PcdBootHartId
diff --git a/Silicon/RISC-V/ProcessorPkg/Include/IndustryStandard/RiscVOpensbi.h b/Silicon/RISC-V/ProcessorPkg/Include/IndustryStandard/RiscVOpensbi.h
index 2dab696af8..e7ac6d26ee 100644
--- a/Silicon/RISC-V/ProcessorPkg/Include/IndustryStandard/RiscVOpensbi.h
+++ b/Silicon/RISC-V/ProcessorPkg/Include/IndustryStandard/RiscVOpensbi.h
@@ -47,6 +47,7 @@ typedef struct {
typedef struct {
VOID *PeiServiceTable; // PEI Service table
+ UINT64 FlattenedDeviceTree; // Pointer to Flattened Device tree
EFI_RISCV_FIRMWARE_CONTEXT_HART_SPECIFIC *HartSpecific[RISC_V_MAX_HART_SUPPORTED];
} EFI_RISCV_OPENSBI_FIRMWARE_CONTEXT;
--
2.33.0
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