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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2015 Freescale Semiconductor, Inc.
* Copyright 2022 NXP
*/
#include <common.h>
#include <dm.h>
#include <env.h>
#include <init.h>
#include <fsl_validate.h>
#include <fsl_secboot_err.h>
#include <fsl_sfp.h>
#include <log.h>
#include <dm/root.h>
#include <asm/fsl_secure_boot.h>
#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_FRAMEWORK)
#include <spl.h>
#endif
#ifdef CONFIG_FSL_CORENET
#include <asm/fsl_pamu.h>
#endif
#ifdef CONFIG_ARCH_LS1021A
#include <asm/arch/immap_ls102xa.h>
#endif
#if defined(CONFIG_MPC85xx)
#define CFG_DCFG_ADDR CFG_SYS_MPC85xx_GUTS_ADDR
#else
#define CFG_DCFG_ADDR CFG_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 *)(CFG_SYS_SFP_ADDR);
struct ccsr_gur __iomem *gur = (void *)(CFG_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;
}
#ifndef CONFIG_SPL_BUILD
int fsl_setenv_chain_of_trust(void)
{
/* Check Boot Mode
* If Boot Mode is Non-Secure, no changes are required
*/
if (fsl_check_boot_mode_secure() == 0)
return 0;
/* If Boot mode is Secure, set the environment variables
* bootdelay = 0 (To disable Boot Prompt)
* bootcmd = CHAIN_BOOT_CMD (Validate and execute Boot script)
*/
env_set("bootdelay", "-2");
#ifdef CONFIG_ARM
env_set("secureboot", "y");
#else
env_set("bootcmd", CHAIN_BOOT_CMD);
#endif
return 0;
}
#endif
#ifdef CONFIG_SPL_BUILD
void spl_validate_uboot(uint32_t hdr_addr, uintptr_t img_addr)
{
int res;
/*
* Check Boot Mode
* If Boot Mode is Non-Secure, skip validation
*/
if (fsl_check_boot_mode_secure() == 0)
return;
printf("SPL: Validating U-Boot image\n");
#ifdef CONFIG_ADDR_MAP
init_addr_map();
#endif
#ifdef CONFIG_FSL_CORENET
if (pamu_init() < 0)
fsl_secboot_handle_error(ERROR_ESBC_PAMU_INIT);
#endif
/*
* dm_init_and_scan() is called as part of common SPL framework, so no
* need to call it again but in case of powerpc platforms which currently
* do not use common SPL framework, so need to call this function here.
*/
#if defined(CONFIG_SPL_DM) && (!defined(CONFIG_SPL_FRAMEWORK))
dm_init_and_scan(true);
#endif
res = fsl_secboot_validate(hdr_addr, CONFIG_SPL_UBOOT_KEY_HASH,
&img_addr);
if (res == 0)
printf("SPL: Validation of U-Boot successful\n");
}
#ifdef CONFIG_SPL_FRAMEWORK
/* Override weak funtion defined in SPL framework to enable validation
* of main u-boot image before jumping to u-boot image.
*/
void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
{
typedef void __noreturn (*image_entry_noargs_t)(void);
uint32_t hdr_addr;
image_entry_noargs_t image_entry =
(image_entry_noargs_t)(unsigned long)spl_image->entry_point;
hdr_addr = (spl_image->entry_point + spl_image->size -
FSL_U_BOOT_HDR_SIZE);
spl_validate_uboot(hdr_addr, (uintptr_t)spl_image->entry_point);
/*
* In case of failure in validation, spl_validate_uboot would
* not return back in case of Production environment with ITS=1.
* Thus U-Boot will not start.
* In Development environment (ITS=0 and SB_EN=1), the function
* may return back in case of non-fatal failures.
*/
debug("image entry point: 0x%lX\n", spl_image->entry_point);
image_entry();
}
#endif /* ifdef CONFIG_SPL_FRAMEWORK */
#endif /* ifdef CONFIG_SPL_BUILD */
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