renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-16 17:23:55 +08:00
Code

powerpc/boot: Make use of REL16 relocs in powerpc/boot/util.S

Browse Source 
Use bcl 20,31,0f rather than plain bl to avoid unbalancing the link
stack.

Update the code to use REL16 relocs, available for ppc64 in 2009 (and
ppc32 in 2005).

Signed-off-by: Alan Modra <amodra@gmail.com>
[mpe: Incorporate more detail into the change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Alan Modra 2020-11-27 11:48:42 +11:00 committed by Michael Ellerman
parent f47462c9d8
commit 3d635aba0b
1 changed files with 3 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/powerpc/boot/util.S
View File

@ -42,14 +42,11 @@ udelay:
* (nanoseconds + (timebase_period_ns - 1 )) / timebase_period_ns
* timebase_period_ns defaults to 60 (16.6MHz) */
mflr r5
bl 0f
bcl 20,31,0f
0: mflr r6
mtlr r5
lis r5,0b@ha
addi r5,r5,0b@l
subf r5,r5,r6 /* In case we're relocated */
addis r5,r5,timebase_period_ns@ha
lwz r5,timebase_period_ns@l(r5)
addis r5,r6,(timebase_period_ns-0b)@ha
lwz r5,(timebase_period_ns-0b)@l(r5)
add r4,r4,r5
addi r4,r4,-1
divw r4,r4,r5 /* BUS ticks */