Commit 226b6932 authored by Russell King's avatar Russell King

[ARM] Don't read the CPU control reg back - it may be write only.

Some ARM CPUs don't allow CP15 CR1 control register to be read.
Therefore, to ensure that the value hits the control register on
Xscale, read back the CP15 CR0 ID register instead.
parent a350bc24
......@@ -120,9 +120,9 @@ __turn_mmu_on:
orr r0, r0, #2 @ ...........A.
#endif
mcr p15, 0, r0, c1, c0, 0 @ write control reg
mrc p15, 0, r0, c1, c0, 0 @ read it back.
mov r0, r0
mov r0, r0
mrc p15, 0, r3, c0, c0, 0 @ read id reg
mov r3, r3
mov r3, r3
mov pc, lr
/*
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment