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arm64: zynqmp: Access timestamp_ref_ctrl register only if running in el3

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Access the timestamp ref ctrl register only if runinng
at el3 level otherwise just return. This change fixes
the issue when CRL APB is marked as secure and accessing
when not in el3 causes exception.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Siva Durga Prasad Paladugu 2017-12-07 15:05:30 +05:30 • committed by Michal Simek
parent 6d0cbbd596
commit ec60a279ec
1 changed files with 4 additions and 1 deletions
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5
board/xilinx/zynqmp/zynqmp.c
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@ -277,10 +277,13 @@ int board_early_init_r(void)
{
u32 val;
if (current_el() != 3)
return 0;
val = readl(&crlapb_base->timestamp_ref_ctrl);
val &= ZYNQMP_CRL_APB_TIMESTAMP_REF_CTRL_CLKACT;
if (current_el() == 3 && !val) {
if (!val) {
val = readl(&crlapb_base->timestamp_ref_ctrl);
val |= ZYNQMP_CRL_APB_TIMESTAMP_REF_CTRL_CLKACT;
writel(val, &crlapb_base->timestamp_ref_ctrl);