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c1c564af52
When an image is signed/encrypted on K2 devices the image may get padded to meet alignment requirements for the signature/encryption type. The original size is appended as 4 bytes little-endian to the end of the final image. Normally the trailing extra bytes are ignored and so restoring the exact original size is not important. In the case of initrd the original size is important as the kernel uses it to look for additional filesystem data and can do the wrong thing when the size is not correct. Read off the original size and report it back from the image post processing stage. Signed-off-by: Andrew F. Davis <afd@ti.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
140 lines
3.1 KiB
C
140 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* K2x: Secure commands file
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*
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* Copyright (C) 2012-2019 Texas Instruments Incorporated - http://www.ti.com/
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*/
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#include <asm/unaligned.h>
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#include <common.h>
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#include <command.h>
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#include <mach/mon.h>
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#include <spl.h>
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asm(".arch_extension sec\n\t");
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int mon_install(u32 addr, u32 dpsc, u32 freq, u32 bm_addr)
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{
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int result;
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__asm__ __volatile__ (
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"stmfd r13!, {lr}\n"
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"mov r0, %1\n"
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"mov r1, %2\n"
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"mov r2, %3\n"
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"mov r3, %4\n"
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"blx r0\n"
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"mov %0, r0\n"
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"ldmfd r13!, {lr}\n"
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: "=&r" (result)
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: "r" (addr), "r" (dpsc), "r" (freq), "r" (bm_addr)
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: "cc", "r0", "r1", "r2", "r3", "memory");
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return result;
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}
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int mon_power_on(int core_id, void *ep)
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{
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int result;
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asm volatile (
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"stmfd r13!, {lr}\n"
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"mov r1, %1\n"
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"mov r2, %2\n"
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"mov r0, #0\n"
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"smc #0\n"
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"mov %0, r0\n"
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"ldmfd r13!, {lr}\n"
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: "=&r" (result)
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: "r" (core_id), "r" (ep)
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: "cc", "r0", "r1", "r2", "memory");
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return result;
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}
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int mon_power_off(int core_id)
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{
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int result;
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asm volatile (
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"stmfd r13!, {lr}\n"
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"mov r1, %1\n"
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"mov r0, #1\n"
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"smc #1\n"
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"mov %0, r0\n"
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"ldmfd r13!, {lr}\n"
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: "=&r" (result)
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: "r" (core_id)
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: "cc", "r0", "r1", "memory");
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return result;
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}
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#ifdef CONFIG_TI_SECURE_DEVICE
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#define KS2_HS_SEC_HEADER_LEN 0x60
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#define KS2_HS_SEC_TAG_OFFSET 0x34
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#define KS2_AUTH_CMD 130
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/**
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* k2_hs_bm_auth() - Invokes security functions using a
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* proprietary TI interface. This binary and source for
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* this is available in the secure development package or
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* SECDEV. For details on how to access this please refer
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* doc/README.ti-secure
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*
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* @cmd: Secure monitor command
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* @arg1: Argument for command
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*
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* returns non-zero value on success, zero on error
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*/
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static int k2_hs_bm_auth(int cmd, void *arg1)
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{
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int result;
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asm volatile (
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"stmfd r13!, {r4-r12, lr}\n"
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"mov r0, %1\n"
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"mov r1, %2\n"
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"smc #2\n"
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"mov %0, r0\n"
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"ldmfd r13!, {r4-r12, lr}\n"
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: "=&r" (result)
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: "r" (cmd), "r" (arg1)
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: "cc", "r0", "r1", "memory");
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return result;
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}
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void board_fit_image_post_process(void **p_image, size_t *p_size)
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{
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int result = 0;
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void *image = *p_image;
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if (strncmp(image + KS2_HS_SEC_TAG_OFFSET, "KEYS", 4)) {
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printf("No signature found in image!\n");
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hang();
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}
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result = k2_hs_bm_auth(KS2_AUTH_CMD, image);
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if (result == 0) {
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printf("Authentication failed!\n");
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hang();
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}
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/*
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* Overwrite the image headers after authentication
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* and decryption. Update size to reflect removal
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* of header and restore original file size.
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*/
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*p_size = get_unaligned_le32(image + (*p_size - 4));
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memcpy(image, image + KS2_HS_SEC_HEADER_LEN, *p_size);
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/*
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* Output notification of successful authentication to re-assure the
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* user that the secure code is being processed as expected. However
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* suppress any such log output in case of building for SPL and booting
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* via YMODEM. This is done to avoid disturbing the YMODEM serial
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* protocol transactions.
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*/
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if (!(IS_ENABLED(CONFIG_SPL_BUILD) &&
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IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
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spl_boot_device() == BOOT_DEVICE_UART))
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printf("Authentication passed\n");
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}
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#endif
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