ARM: sti: Implement dummy L2 cache's write_sec

This patch implements the write_sec callback that handle PL310
secure registers writes.
This callback is just a stub for now, to avoid system crash.
Later, it could handle SMC calls so that TZ handles the needed writes.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/mach-sti/board-dt.c b/arch/arm/mach-sti/board-dt.c
index cfee0efc75f9..e04cd1b201bb 100644
--- a/arch/arm/mach-sti/board-dt.c
+++ b/arch/arm/mach-sti/board-dt.c
@@ -23,6 +23,14 @@ static const char *const stih41x_dt_match[] __initconst = {
         NULL
 };
 
+static void sti_l2_write_sec(unsigned long val, unsigned reg)
+{
+        /*
+         * We can't write to secure registers as we are in non-secure
+         * mode, until we have some SMI service available.
+         */
+}
+
 DT_MACHINE_START(STM, "STi SoC with Flattened Device Tree")
         .dt_compat      = stih41x_dt_match,
         .l2c_aux_val    = L2C_AUX_CTRL_SHARED_OVERRIDE |
@@ -31,4 +39,5 @@ DT_MACHINE_START(STM, "STi SoC with Flattened Device Tree")
                           L2C_AUX_CTRL_WAY_SIZE(4),
         .l2c_aux_mask   = 0xc0000fff,
         .smp            = smp_ops(sti_smp_ops),
+        .l2c_write_sec  = sti_l2_write_sec,
 MACHINE_END