Changeset ebb3538 in mainline for kernel/arch/amd64

Timestamp:

2021-09-15T15:01:03Z (4 years ago)

Author:

Martin Decky <martin@…>

Branches:

master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

5ecac7e

Parents:

8ce56a6

Message:

Improve early kernel debugging prints

Since the early kernel debugging prints are useful only in a few
debugging scenarios, define a configuration option that disables them by
default (if enabled, it produces duplicate output which might be
confusing).

Implement early kernel debugging prints for the HiKey960.

File:

• kernel/arch/amd64/src/asm.S (modified) (2 diffs)

kernel/arch/amd64/src/asm.S

@@ -411 +411 @@
 FUNCTION_BEGIN(early_putuchar)
 
+#if (defined(CONFIG_DEBUG_EARLY_PRINT))
+
 #if (defined(CONFIG_L4RE_UVMM_EARLY_PRINT))
         xorl %eax, %eax  /* RAX==0: uvmm's print hypercall */
@@ -543 +545 @@
 #endif
 
+#endif
+
         ret
 FUNCTION_END(early_putuchar)