ARMv8/layerscape: Add FSL PPA support

The FSL Primary Protected Application (PPA) is a software component
loaded during boot which runs in TrustZone and remains resident
after boot.

Use the secure firmware framework to integrate FSL PPA into U-Boot.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/cpu/armv8/fsl-layerscape/Makefile

@@ -10,6 +10,7 @@ obj-y += soc.o
 obj-$(CONFIG_MP) += mp.o
 obj-$(CONFIG_OF_LIBFDT) += fdt.o
 obj-$(CONFIG_SPL) += spl.o
+obj-$(CONFIG_FSL_LS_PPA) += ppa.o
 
 ifneq ($(CONFIG_FSL_LSCH3),)
 obj-y += fsl_lsch3_speed.o

arch/arm/cpu/armv8/fsl-layerscape/ppa.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2016 NXP Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <config.h>
+#include <errno.h>
+#include <asm/system.h>
+#include <asm/types.h>
+#include <asm/arch/soc.h>
+#ifdef CONFIG_FSL_LSCH3
+#include <asm/arch/immap_lsch3.h>
+#elif defined(CONFIG_FSL_LSCH2)
+#include <asm/arch/immap_lsch2.h>
+#endif
+#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
+#include <asm/armv8/sec_firmware.h>
+#endif
+
+int ppa_init(void)
+{
+	const void *ppa_fit_addr;
+	u32 *boot_loc_ptr_l, *boot_loc_ptr_h;
+	int ret;
+
+#ifdef CONFIG_SYS_LS_PPA_FW_IN_NOR
+	ppa_fit_addr = (void *)CONFIG_SYS_LS_PPA_FW_ADDR;
+#else
+#error "No CONFIG_SYS_LS_PPA_FW_IN_xxx defined"
+#endif
+
+#ifdef CONFIG_FSL_LSCH3
+	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
+	boot_loc_ptr_l = &gur->bootlocptrl;
+	boot_loc_ptr_h = &gur->bootlocptrh;
+#elif defined(CONFIG_FSL_LSCH2)
+	struct ccsr_scfg __iomem *scfg = (void *)(CONFIG_SYS_FSL_SCFG_ADDR);
+	boot_loc_ptr_l = &scfg->scratchrw[1];
+	boot_loc_ptr_h = &scfg->scratchrw[0];
+#endif
+
+	debug("fsl-ppa: boot_loc_ptr_l = 0x%p, boot_loc_ptr_h =0x%p\n",
+	      boot_loc_ptr_l, boot_loc_ptr_h);
+	ret = sec_firmware_init(ppa_fit_addr, boot_loc_ptr_l, boot_loc_ptr_h);
+
+	return ret;
+}

arch/arm/include/asm/arch-fsl-layerscape/ppa.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2016 NXP Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __FSL_PPA_H_
+#define __FSL_PPA_H_
+
+#define SEC_FIRMWARE_FIT_IMAGE		"firmware"
+#define SEC_FIRMEWARE_FIT_CNF_NAME	"config@1"
+#define SEC_FIRMWARE_TARGET_EL		2
+
+int ppa_init(void);
+
+#endif

arch/arm/include/asm/armv8/sec_firmware.h

@@ -7,6 +7,10 @@
 #ifndef __SEC_FIRMWARE_H_
 #define __SEC_FIRMWARE_H_
 
+#ifdef CONFIG_FSL_LS_PPA
+#include <asm/arch/ppa.h>
+#endif
+
 int sec_firmware_init(const void *, u32 *, u32 *);
 int _sec_firmware_entry(const void *, u32 *, u32 *);
 bool sec_firmware_is_valid(const void *);