Merge tag 'renesas-soc-for-v4.15' of...

Merge tag 'renesas-soc-for-v4.15' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/soc

Pull "Renesas ARM Based SoC Updates for v4.15" from Simon Horman:

* Prepare to enable SMP on R-Car E2 (r8a7794).

  Geert Uytterhoeven says:
  "The main hurdle here is that R-Car Gen2 boot loaders do not initialize
   the arch_timer CNTVOFF register, which thus needs workarounds on Linux.

   - The first patch adds a definition for MON_MODE, as suggested by Marc
     Zyngier,
   - The second patch makes sure CNTVOFF is initialized for boot and
     secondary Cortex-A15 and Cortex-A7 CPU cores, like is already done for
     the boot Cortex-A7 CPU core.  Without this, the ARM arch timer does
     not work on secondary CPU cores."

   A follow-up patch to enable SMP in DT on R-Car E2 (r8a7794) is currently
   deferred unto v4.16 as it depends on the above.

* Enable low-level debugging support for RZ/G1E (r8a7745).

  Fabrizio Castro says, "RZ/G1E uses SCIF4 for the debug console."

* tag 'renesas-soc-for-v4.15' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: rcar-gen2: Make sure CNTVOFF is initialized on CA7/15
  ARM: Add definition for monitor mode
  ARM: debug-ll: Add support for r8a7745

arch/arm/Kconfig.debug

@@ -911,6 +911,13 @@ choice
 		  Say Y here if you want kernel low-level debugging support
 		  via SCIF2 on Renesas R-Car E2 (R8A7794).
 
+	config DEBUG_RCAR_GEN2_SCIF4
+		bool "Kernel low-level debugging messages via SCIF4 on R8A7745"
+		depends on ARCH_R8A7745
+		help
+		  Say Y here if you want kernel low-level debugging support
+		  via SCIF4 on Renesas RZ/G1E (R8A7745).
+
 	config DEBUG_RMOBILE_SCIFA0
 		bool "Kernel low-level debugging messages via SCIFA0 on R8A73A4"
 		depends on ARCH_R8A73A4
@@ -1451,6 +1458,7 @@ config DEBUG_LL_INCLUDE
 	default "debug/renesas-scif.S" if DEBUG_RCAR_GEN1_SCIF2
 	default "debug/renesas-scif.S" if DEBUG_RCAR_GEN2_SCIF0
 	default "debug/renesas-scif.S" if DEBUG_RCAR_GEN2_SCIF2
+	default "debug/renesas-scif.S" if DEBUG_RCAR_GEN2_SCIF4
 	default "debug/renesas-scif.S" if DEBUG_RMOBILE_SCIFA0
 	default "debug/renesas-scif.S" if DEBUG_RMOBILE_SCIFA1
 	default "debug/renesas-scif.S" if DEBUG_RMOBILE_SCIFA4
@@ -1570,6 +1578,7 @@ config DEBUG_UART_PHYS
 	default 0xe6c80000 if DEBUG_RMOBILE_SCIFA4
 	default 0xe6e58000 if DEBUG_RCAR_GEN2_SCIF2
 	default 0xe6e60000 if DEBUG_RCAR_GEN2_SCIF0
+	default 0xe6ee0000 if DEBUG_RCAR_GEN2_SCIF4
 	default 0xe8008000 if DEBUG_R7S72100_SCIF2
 	default 0xf0000be0 if ARCH_EBSA110
 	default 0xf1012000 if DEBUG_MVEBU_UART0_ALTERNATE
@@ -1604,6 +1613,7 @@ config DEBUG_UART_PHYS
 		DEBUG_QCOM_UARTDM || DEBUG_R7S72100_SCIF2 || \
 		DEBUG_RCAR_GEN1_SCIF0 || DEBUG_RCAR_GEN1_SCIF2 || \
 		DEBUG_RCAR_GEN2_SCIF0 || DEBUG_RCAR_GEN2_SCIF2 || \
+		DEBUG_RCAR_GEN2_SCIF4 || \
 		DEBUG_RMOBILE_SCIFA0 || DEBUG_RMOBILE_SCIFA1 || \
 		DEBUG_RMOBILE_SCIFA4 || DEBUG_S3C24XX_UART || \
 		DEBUG_S3C64XX_UART || \

arch/arm/include/uapi/asm/ptrace.h

@@ -53,6 +53,7 @@
 #endif
 #define FIQ_MODE	0x00000011
 #define IRQ_MODE	0x00000012
+#define MON_MODE	0x00000016
 #define ABT_MODE	0x00000017
 #define HYP_MODE	0x0000001a
 #define UND_MODE	0x0000001b

arch/arm/mach-shmobile/Makefile

@@ -22,6 +22,7 @@ cpu-y				:= platsmp.o headsmp.o
 # Shared SoC family objects
 obj-$(CONFIG_ARCH_RCAR_GEN2)	+= setup-rcar-gen2.o platsmp-apmu.o $(cpu-y)
 CFLAGS_setup-rcar-gen2.o	+= -march=armv7-a
+obj-$(CONFIG_ARCH_RCAR_GEN2)	+= headsmp-apmu.o
 obj-$(CONFIG_ARCH_R8A7790)	+= regulator-quirk-rcar-gen2.o
 obj-$(CONFIG_ARCH_R8A7791)	+= regulator-quirk-rcar-gen2.o
 obj-$(CONFIG_ARCH_R8A7793)	+= regulator-quirk-rcar-gen2.o

arch/arm/mach-shmobile/common.h

 #ifndef __ARCH_MACH_COMMON_H
 #define __ARCH_MACH_COMMON_H
 
+extern void shmobile_init_cntvoff(void);
 extern void shmobile_init_delay(void);
 extern void shmobile_boot_vector(void);
 extern unsigned long shmobile_boot_fn;
@@ -11,6 +12,7 @@ extern void shmobile_smp_hook(unsigned int cpu, unsigned long fn,
 			      unsigned long arg);
 extern bool shmobile_smp_cpu_can_disable(unsigned int cpu);
 extern bool shmobile_smp_init_fallback_ops(void);
+extern void shmobile_boot_apmu(void);
 extern void shmobile_boot_scu(void);
 extern void shmobile_smp_scu_prepare_cpus(phys_addr_t scu_base_phys,
 					  unsigned int max_cpus);

arch/arm/mach-shmobile/headsmp-apmu.S

+/*
+ * SMP support for APMU based systems with Cortex A7/A15
+ *
+ * Copyright (C) 2014  Renesas Electronics Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ENTRY(shmobile_init_cntvoff)
+	/*
+	 * CNTVOFF has to be initialized either from non-secure Hypervisor
+	 * mode or secure Monitor mode with SCR.NS==1. If TrustZone is enabled
+	 * then it should be handled by the secure code
+	 */
+	cps	#MON_MODE
+	mrc	p15, 0, r1, c1, c1, 0		/* Get Secure Config */
+	orr	r0, r1, #1
+	mcr	p15, 0, r0, c1, c1, 0		/* Set Non Secure bit */
+	instr_sync
+	mov	r0, #0
+	mcrr	p15, 4, r0, r0, c14		/* CNTVOFF = 0 */
+	instr_sync
+	mcr	p15, 0, r1, c1, c1, 0		/* Set Secure bit */
+	instr_sync
+	cps	#SVC_MODE
+	ret	lr
+ENDPROC(shmobile_init_cntvoff)
+
+ENTRY(shmobile_boot_apmu)
+	bl	shmobile_init_cntvoff
+	b	secondary_startup
+ENDPROC(shmobile_boot_apmu)

arch/arm/mach-shmobile/platsmp-apmu.c

@@ -204,7 +204,7 @@ void __init shmobile_smp_apmu_prepare_cpus(unsigned int max_cpus,
 int shmobile_smp_apmu_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	/* For this particular CPU register boot vector */
-	shmobile_smp_hook(cpu, __pa_symbol(secondary_startup), 0);
+	shmobile_smp_hook(cpu, __pa_symbol(shmobile_boot_apmu), 0);
 
 	return apmu_wrap(cpu, apmu_power_on);
 }

arch/arm/mach-shmobile/setup-rcar-gen2.c

@@ -70,28 +70,12 @@ void __init rcar_gen2_timer_init(void)
 	void __iomem *base;
 	u32 freq;
 
+	shmobile_init_cntvoff();
+
 	if (of_machine_is_compatible("renesas,r8a7745") ||
 	    of_machine_is_compatible("renesas,r8a7792") ||
 	    of_machine_is_compatible("renesas,r8a7794")) {
 		freq = 260000000 / 8;	/* ZS / 8 */
-		/* CNTVOFF has to be initialized either from non-secure
-		 * Hypervisor mode or secure Monitor mode with SCR.NS==1.
-		 * If TrustZone is enabled then it should be handled by the
-		 * secure code.
-		 */
-		asm volatile(
-		"	cps	0x16\n"
-		"	mrc	p15, 0, r1, c1, c1, 0\n"
-		"	orr	r0, r1, #1\n"
-		"	mcr	p15, 0, r0, c1, c1, 0\n"
-		"	isb\n"
-		"	mov	r0, #0\n"
-		"	mcrr	p15, 4, r0, r0, c14\n"
-		"	isb\n"
-		"	mcr	p15, 0, r1, c1, c1, 0\n"
-		"	isb\n"
-		"	cps	0x13\n"
-			: : : "r0", "r1");
 	} else {
 		/* At Linux boot time the r8a7790 arch timer comes up
 		 * with the counter disabled. Moreover, it may also report