arm: zynq: Invalidate L1 in secondary boot

During boot, Linux initiates a clean-invalidate operation only, resulting
in faulty data to be written to the memory system during resume.
Therefore invalidate the L1 in the secondary boot path to avoid these
issues.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/mach-zynq/common.h

@@ -17,6 +17,8 @@
 #ifndef __MACH_ZYNQ_COMMON_H__
 #define __MACH_ZYNQ_COMMON_H__
 
+void zynq_secondary_startup(void);
+
 extern int zynq_slcr_init(void);
 extern void zynq_slcr_system_reset(void);
 extern void zynq_slcr_cpu_stop(int cpu);

arch/arm/mach-zynq/headsmp.S

@@ -18,5 +18,9 @@ zynq_secondary_trampoline_jump:
 	.word	/* cpu 1 */
 .globl zynq_secondary_trampoline_end
 zynq_secondary_trampoline_end:
-
 ENDPROC(zynq_secondary_trampoline)
+
+ENTRY(zynq_secondary_startup)
+	bl	v7_invalidate_l1
+	b	secondary_startup
+ENDPROC(zynq_secondary_startup)

arch/arm/mach-zynq/platsmp.c

@@ -90,7 +90,7 @@ EXPORT_SYMBOL(zynq_cpun_start);
 static int zynq_boot_secondary(unsigned int cpu,
 						struct task_struct *idle)
 {
-	return zynq_cpun_start(virt_to_phys(secondary_startup), cpu);
+	return zynq_cpun_start(virt_to_phys(zynq_secondary_startup), cpu);
 }
 
 /*