mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-08 22:24:32 +00:00
166 lines
4.1 KiB
C
166 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2015 Freescale Semiconductor, Inc.
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*/
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#include <common.h>
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#include <dm.h>
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#include <env.h>
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#include <fsl_validate.h>
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#include <fsl_secboot_err.h>
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#include <fsl_sfp.h>
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#include <log.h>
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#include <dm/root.h>
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#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_FRAMEWORK)
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#include <spl.h>
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#endif
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#ifdef CONFIG_ADDR_MAP
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#include <asm/mmu.h>
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#endif
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#ifdef CONFIG_FSL_CORENET
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#include <asm/fsl_pamu.h>
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#endif
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#ifdef CONFIG_ARCH_LS1021A
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#include <asm/arch/immap_ls102xa.h>
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#endif
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#if defined(CONFIG_MPC85xx)
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#define CONFIG_DCFG_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR
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#else
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#define CONFIG_DCFG_ADDR CONFIG_SYS_FSL_GUTS_ADDR
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#endif
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#ifdef CONFIG_SYS_FSL_CCSR_GUR_LE
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#define gur_in32(a) in_le32(a)
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#else
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#define gur_in32(a) in_be32(a)
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#endif
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/* Check the Boot Mode. If Secure, return 1 else return 0 */
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int fsl_check_boot_mode_secure(void)
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{
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uint32_t val;
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struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
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struct ccsr_gur __iomem *gur = (void *)(CONFIG_DCFG_ADDR);
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val = sfp_in32(&sfp_regs->ospr) & ITS_MASK;
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if (val == ITS_MASK)
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return 1;
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#if defined(CONFIG_FSL_CORENET) || !defined(CONFIG_MPC85xx)
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/* For PBL based platforms check the SB_EN bit in RCWSR */
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val = gur_in32(&gur->rcwsr[RCW_SB_EN_REG_INDEX - 1]) & RCW_SB_EN_MASK;
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if (val == RCW_SB_EN_MASK)
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return 1;
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#endif
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#if defined(CONFIG_MPC85xx) && !defined(CONFIG_FSL_CORENET)
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/* For Non-PBL Platforms, check the Device Status register 2*/
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val = gur_in32(&gur->pordevsr2) & MPC85xx_PORDEVSR2_SBC_MASK;
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if (val != MPC85xx_PORDEVSR2_SBC_MASK)
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return 1;
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#endif
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return 0;
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}
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#ifndef CONFIG_SPL_BUILD
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int fsl_setenv_chain_of_trust(void)
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{
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/* Check Boot Mode
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* If Boot Mode is Non-Secure, no changes are required
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*/
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if (fsl_check_boot_mode_secure() == 0)
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return 0;
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/* If Boot mode is Secure, set the environment variables
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* bootdelay = 0 (To disable Boot Prompt)
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* bootcmd = CONFIG_CHAIN_BOOT_CMD (Validate and execute Boot script)
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*/
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env_set("bootdelay", "-2");
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#ifdef CONFIG_ARM
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env_set("secureboot", "y");
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#else
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env_set("bootcmd", CONFIG_CHAIN_BOOT_CMD);
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#endif
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return 0;
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}
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#endif
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#ifdef CONFIG_SPL_BUILD
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void spl_validate_uboot(uint32_t hdr_addr, uintptr_t img_addr)
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{
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int res;
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/*
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* Check Boot Mode
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* If Boot Mode is Non-Secure, skip validation
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*/
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if (fsl_check_boot_mode_secure() == 0)
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return;
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printf("SPL: Validating U-Boot image\n");
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#ifdef CONFIG_ADDR_MAP
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init_addr_map();
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#endif
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#ifdef CONFIG_FSL_CORENET
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if (pamu_init() < 0)
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fsl_secboot_handle_error(ERROR_ESBC_PAMU_INIT);
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#endif
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#ifdef CONFIG_FSL_CAAM
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if (sec_init() < 0)
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fsl_secboot_handle_error(ERROR_ESBC_SEC_INIT);
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#endif
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/*
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* dm_init_and_scan() is called as part of common SPL framework, so no
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* need to call it again but in case of powerpc platforms which currently
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* do not use common SPL framework, so need to call this function here.
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*/
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#if defined(CONFIG_SPL_DM) && (!defined(CONFIG_SPL_FRAMEWORK))
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dm_init_and_scan(true);
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#endif
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res = fsl_secboot_validate(hdr_addr, CONFIG_SPL_UBOOT_KEY_HASH,
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&img_addr);
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if (res == 0)
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printf("SPL: Validation of U-boot successful\n");
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}
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#ifdef CONFIG_SPL_FRAMEWORK
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/* Override weak funtion defined in SPL framework to enable validation
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* of main u-boot image before jumping to u-boot image.
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*/
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void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
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{
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typedef void __noreturn (*image_entry_noargs_t)(void);
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uint32_t hdr_addr;
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image_entry_noargs_t image_entry =
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(image_entry_noargs_t)(unsigned long)spl_image->entry_point;
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hdr_addr = (spl_image->entry_point + spl_image->size -
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CONFIG_U_BOOT_HDR_SIZE);
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spl_validate_uboot(hdr_addr, (uintptr_t)spl_image->entry_point);
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/*
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* In case of failure in validation, spl_validate_uboot would
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* not return back in case of Production environment with ITS=1.
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* Thus U-Boot will not start.
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* In Development environment (ITS=0 and SB_EN=1), the function
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* may return back in case of non-fatal failures.
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*/
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debug("image entry point: 0x%lX\n", spl_image->entry_point);
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image_entry();
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}
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#endif /* ifdef CONFIG_SPL_FRAMEWORK */
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#endif /* ifdef CONFIG_SPL_BUILD */
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