ARMv8/FSL_LSCH3: Add FSL_LSCH3 SoC
Freescale LayerScape with Chassis Generation 3 is a set of SoCs with
ARMv8 cores and 3rd generation of Chassis. We use different MMU setup
to support memory map and cache attribute for these SoCs. MMU and cache
are enabled very early to bootst performance, especially for early
development on emulators. After u-boot relocates to DDR, a new MMU
table with QBMan cache access is created in DDR. SMMU pagesize is set
in SMMU_sACR register. Both DDR3 and DDR4 are supported.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Arnab Basu <arnab.basu@freescale.com>
diff --git a/arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S b/arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S
new file mode 100644
index 0000000..ad32b6c
--- /dev/null
+++ b/arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S
@@ -0,0 +1,65 @@
+/*
+ * (C) Copyright 2014 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * Extracted from armv8/start.S
+ */
+
+#include <config.h>
+#include <linux/linkage.h>
+#include <asm/macro.h>
+
+ENTRY(lowlevel_init)
+ mov x29, lr /* Save LR */
+
+ /* Set the SMMU page size in the sACR register */
+ ldr x1, =SMMU_BASE
+ ldr w0, [x1, #0x10]
+ orr w0, w0, #1 << 16 /* set sACR.pagesize to indicate 64K page */
+ str w0, [x1, #0x10]
+
+ /* Initialize GIC Secure Bank Status */
+#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
+ branch_if_slave x0, 1f
+ ldr x0, =GICD_BASE
+ bl gic_init_secure
+1:
+#ifdef CONFIG_GICV3
+ ldr x0, =GICR_BASE
+ bl gic_init_secure_percpu
+#elif defined(CONFIG_GICV2)
+ ldr x0, =GICD_BASE
+ ldr x1, =GICC_BASE
+ bl gic_init_secure_percpu
+#endif
+#endif
+
+ branch_if_master x0, x1, 1f
+
+ /*
+ * Slave should wait for master clearing spin table.
+ * This sync prevent salves observing incorrect
+ * value of spin table and jumping to wrong place.
+ */
+#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
+#ifdef CONFIG_GICV2
+ ldr x0, =GICC_BASE
+#endif
+ bl gic_wait_for_interrupt
+#endif
+
+ /*
+ * All processors will enter EL2 and optionally EL1.
+ */
+ bl armv8_switch_to_el2
+#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
+ bl armv8_switch_to_el1
+#endif
+ b 2f
+
+1:
+2:
+ mov lr, x29 /* Restore LR */
+ ret
+ENDPROC(lowlevel_init)