Changeset 5e629ad4 in mainline

Timestamp:

2022-01-31T15:50:14Z (2 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

50c8e72, c6d8c535

Parents:

7fc81da

git-author:

Jiri Svoboda <jiri@…> (2022-01-30 03:44:31)

git-committer:

Jiri Svoboda <jiri@…> (2022-01-31 15:50:14)

Message:

Fix setting of CR0.TS bit on ia32 being logically reversed

This was observable as causing kernel deadlock with lazy FPU
switching disabled.

File:

• kernel/arch/ia32/src/cpu/cpu.c (modified) (1 diff)

kernel/arch/ia32/src/cpu/cpu.c

@@ -71 +71 @@
 void fpu_disable(void)
 {
-        write_cr0(read_cr0() & ~CR0_TS);
+        write_cr0(read_cr0() | CR0_TS);
 }
 
 void fpu_enable(void)
 {
-        write_cr0(read_cr0() | CR0_TS);
+        write_cr0(read_cr0() & ~CR0_TS);
 }