Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2025-01-25 11:25:17 +00:00
Code Issues Projects Releases Packages Wiki Activity

ppc/85xx: Disable all async interrupt sources when we boot

Browse source 
We should make sure to clear MSR[ME, CE, DE] when we boot an OS image
since we have changed the exception vectors and the OSes vectors might
not be setup we should avoid async interrupts at all costs.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2009-09-11 15:28:41 -05:00 committed by Tom Rix
parent 002ebefddc
commit f8d7b56e00
1 changed files with 11 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
cpu/mpc85xx/cpu_init.c
View file

@ -364,5 +364,16 @@ extern void setup_ivors(void);
void arch_preboot_os(void)
{
u32 msr;
/*
* We are changing interrupt offsets and are about to boot the OS so
* we need to make sure we disable all async interrupts. EE is already
* disabled by the time we get called.
*/
msr = mfmsr();
msr &= ~(MSR_ME|MSR_CE|MSR_DE);
mtmsr(msr);
setup_ivors();
}