secure_boot: create function to determine boot mode

A function is created to detrmine if the boot mode is secure
or non-secure for differnt SoC's.

Signed-off-by: Aneesh Bansal <aneesh.bansal@nxp.com>
Acked-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h

@@ -218,6 +218,9 @@ struct ccsr_gur {
 #define FSL_CHASSIS2_RCWSR0_MEM_PLL_RAT_MASK	0x3f
 #define FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_MASK	0xffff0000
 #define FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_SHIFT	16
+#define RCW_SB_EN_REG_INDEX	7
+#define RCW_SB_EN_MASK		0x00200000
+
 	u8      res_140[0x200-0x140];
 	u32     scratchrw[4];  /* Scratch Read/Write */
 	u8      res_210[0x300-0x210];

arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h

@@ -120,6 +120,8 @@ struct ccsr_gur {
 	u32	brrl;		/* Boot release */
 	u8      res_0e8[0x100-0xe8];
 	u32     rcwsr[16];      /* Reset control word status */
+#define RCW_SB_EN_REG_INDEX	7
+#define RCW_SB_EN_MASK		0x00200000
 	u8      res_140[0x200-0x140];
 	u32     scratchrw[4];  /* Scratch Read/Write */
 	u8      res_210[0x300-0x210];

arch/powerpc/include/asm/immap_85xx.h

@@ -1749,6 +1749,8 @@ typedef struct ccsr_gur {
 	u32	brrl;		/* Boot release */
 	u8	res17[24];
 	u32	rcwsr[16];	/* Reset control word status */
+#define RCW_SB_EN_REG_INDEX	7
+#define RCW_SB_EN_MASK		0x00200000
 
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 #define FSL_CORENET_RCWSR0_MEM_PLL_RAT_SHIFT	16
@@ -2194,6 +2196,7 @@ typedef struct ccsr_gur {
 #define MPC85xx_PORDEVSR2_DDR_SPD_0	0x00000008
 #define MPC85xx_PORDEVSR2_DDR_SPD_0_SHIFT	3
 #endif
+#define MPC85xx_PORDEVSR2_SBC_MASK	0x10000000
 /* The 8544 RM says this is bit 26, but it's really bit 24 */
 #define MPC85xx_PORDEVSR2_SEC_CFG	0x00000080
 	u8	res1[8];

board/freescale/common/fsl_chain_of_trust.c

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <fsl_validate.h>
+#include <fsl_sfp.h>
+
+#ifdef CONFIG_LS102XA
+#include <asm/arch/immap_ls102xa.h>
+#endif
+
+#if defined(CONFIG_MPC85xx)
+#define CONFIG_DCFG_ADDR	CONFIG_SYS_MPC85xx_GUTS_ADDR
+#else
+#define CONFIG_DCFG_ADDR	CONFIG_SYS_FSL_GUTS_ADDR
+#endif
+
+#ifdef CONFIG_SYS_FSL_CCSR_GUR_LE
+#define gur_in32(a)       in_le32(a)
+#else
+#define gur_in32(a)       in_be32(a)
+#endif
+
+/* Check the Boot Mode. If Secure, return 1 else return 0 */
+int fsl_check_boot_mode_secure(void)
+{
+	uint32_t val;
+	struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
+	struct ccsr_gur __iomem *gur = (void *)(CONFIG_DCFG_ADDR);
+
+	val = sfp_in32(&sfp_regs->ospr) & ITS_MASK;
+	if (val == ITS_MASK)
+		return 1;
+
+#if defined(CONFIG_FSL_CORENET) || !defined(CONFIG_MPC85xx)
+	/* For PBL based platforms check the SB_EN bit in RCWSR */
+	val = gur_in32(&gur->rcwsr[RCW_SB_EN_REG_INDEX - 1]) & RCW_SB_EN_MASK;
+	if (val == RCW_SB_EN_MASK)
+		return 1;
+#endif
+
+#if defined(CONFIG_MPC85xx) && !defined(CONFIG_FSL_CORENET)
+	/* For Non-PBL Platforms, check the Device Status register 2*/
+	val = gur_in32(&gur->pordevsr2) & MPC85xx_PORDEVSR2_SBC_MASK;
+	if (val != MPC85xx_PORDEVSR2_SBC_MASK)
+		return 1;
+
+#endif
+	return 0;
+}