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ARM: PSCI: save and restore clobbered registers in v7_flush_dcache_all

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Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Chen-Yu Tsai
2016-06-07 10:54:25 +08:00
committed by Hans de Goede
parent dae08d2281
commit 778dc5f43e
1 changed files with 2 additions and 0 deletions
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2
arch/arm/cpu/armv7/psci.S
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@@ -110,6 +110,7 @@ ENDPROC(psci_get_cpu_id)
/* Imported from Linux kernel */ /* Imported from Linux kernel */
LENTRY(v7_flush_dcache_all) LENTRY(v7_flush_dcache_all)
stmfd sp!, {r4-r5, r7, r9-r11, lr}
dmb @ ensure ordering with previous memory accesses dmb @ ensure ordering with previous memory accesses
mrc p15, 1, r0, c0, c0, 1 @ read clidr mrc p15, 1, r0, c0, c0, 1 @ read clidr
ands r3, r0, #0x7000000 @ extract loc from clidr ands r3, r0, #0x7000000 @ extract loc from clidr
@@ -153,6 +154,7 @@ finished:
mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr
dsb st dsb st
isb isb
ldmfd sp!, {r4-r5, r7, r9-r11, lr}
bx lr bx lr
ENDPROC(v7_flush_dcache_all) ENDPROC(v7_flush_dcache_all)