[edk2-devel] [PATCH 7/9] Platform/RaspberryPi: Add SPI/GPIO to memory map

[Jeremy Linton]

A large reason for using the SPI flash on this platform is that
it can be updated without OS interference at rutime. In order for
that to happen we need both the SPI, as well as the GPIO
which is used to change the pinmux from the PWM device to SPI added
to the UEFI memory map as being used by the runtime service.

Signed-off-by: Jeremy Linton <jeremy.linton at arm.com>
---
 Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
index 3d058cb40d..ccdeddf3c0 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
@@ -503,6 +503,22 @@ ApplyVariables (
     DEBUG ((DEBUG_INFO, "Current CPU speed is %u MHz\n", Rate / FREQ_1_MHZ));
   }
 
+  if (mModelFamily == 4) {
+    Status = gDS->AddMemorySpace (EfiGcdMemoryTypeMemoryMappedIo, BCM2836_SPI0_BASE_ADDRESS,
+                                  SIZE_4KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
+    ASSERT_EFI_ERROR (Status);
+    Status = gDS->SetMemorySpaceAttributes (BCM2836_SPI0_BASE_ADDRESS,
+                                            SIZE_4KB, EFI_MEMORY_UC|EFI_MEMORY_RUNTIME);
+
+    Status = gDS->AddMemorySpace (EfiGcdMemoryTypeMemoryMappedIo, GPIO_BASE_ADDRESS,
+                                  SIZE_4KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
+    ASSERT_EFI_ERROR (Status);
+    Status = gDS->SetMemorySpaceAttributes (GPIO_BASE_ADDRESS,
+                                            SIZE_4KB, EFI_MEMORY_UC|EFI_MEMORY_RUNTIME);
+
+    ASSERT_EFI_ERROR (Status);
+  }
+
   if (mModelFamily >= 4 && PcdGet32 (PcdRamMoreThan3GB) != 0 &&
       PcdGet32 (PcdRamLimitTo3GB) == 0) {
     UINT64 SystemMemorySize;
-- 
2.13.7



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#84260): https://edk2.groups.io/g/devel/message/84260
Mute This Topic: https://groups.io/mt/87456863/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-