mon.c
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/*
* K2HK: secure kernel command file
*
* (C) Copyright 2012-2014
* Texas Instruments Incorporated, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <mach/mon.h>
#include <spl.h>
asm(".arch_extension sec\n\t");
int mon_install(u32 addr, u32 dpsc, u32 freq, u32 bm_addr)
{
int result;
__asm__ __volatile__ (
"stmfd r13!, {lr}\n"
"mov r0, %1\n"
"mov r1, %2\n"
"mov r2, %3\n"
"mov r3, %4\n"
"blx r0\n"
"mov %0, r0\n"
"ldmfd r13!, {lr}\n"
: "=&r" (result)
: "r" (addr), "r" (dpsc), "r" (freq), "r" (bm_addr)
: "cc", "r0", "r1", "r2", "r3", "memory");
return result;
}
int mon_power_on(int core_id, void *ep)
{
int result;
asm volatile (
"stmfd r13!, {lr}\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r0, #0\n"
"smc #0\n"
"mov %0, r0\n"
"ldmfd r13!, {lr}\n"
: "=&r" (result)
: "r" (core_id), "r" (ep)
: "cc", "r0", "r1", "r2", "memory");
return result;
}
int mon_power_off(int core_id)
{
int result;
asm volatile (
"stmfd r13!, {lr}\n"
"mov r1, %1\n"
"mov r0, #1\n"
"smc #1\n"
"mov %0, r0\n"
"ldmfd r13!, {lr}\n"
: "=&r" (result)
: "r" (core_id)
: "cc", "r0", "r1", "memory");
return result;
}
#ifdef CONFIG_TI_SECURE_DEVICE
#define KS2_HS_SEC_HEADER_LEN 0x60
#define KS2_HS_SEC_TAG_OFFSET 0x34
#define KS2_AUTH_CMD 130
/**
* k2_hs_bm_auth() - Invokes security functions using a
* proprietary TI interface. This binary and source for
* this is available in the secure development package or
* SECDEV. For details on how to access this please refer
* doc/README.ti-secure
*
* @cmd: Secure monitor command
* @arg1: Argument for command
*
* returns non-zero value on success, zero on error
*/
static int k2_hs_bm_auth(int cmd, void *arg1)
{
int result;
asm volatile (
"stmfd r13!, {r4-r12, lr}\n"
"mov r0, %1\n"
"mov r1, %2\n"
"smc #2\n"
"mov %0, r0\n"
"ldmfd r13!, {r4-r12, lr}\n"
: "=&r" (result)
: "r" (cmd), "r" (arg1)
: "cc", "r0", "r1", "memory");
return result;
}
void board_fit_image_post_process(void **p_image, size_t *p_size)
{
int result = 0;
void *image = *p_image;
if (strncmp(image + KS2_HS_SEC_TAG_OFFSET, "KEYS", 4)) {
printf("No signature found in image!\n");
hang();
}
result = k2_hs_bm_auth(KS2_AUTH_CMD, image);
if (result == 0) {
printf("Authentication failed!\n");
hang();
}
/*
* Overwrite the image headers after authentication
* and decryption. Update size to reflect removal
* of header.
*/
*p_size -= KS2_HS_SEC_HEADER_LEN;
memcpy(image, image + KS2_HS_SEC_HEADER_LEN, *p_size);
/*
* Output notification of successful authentication to re-assure the
* user that the secure code is being processed as expected. However
* suppress any such log output in case of building for SPL and booting
* via YMODEM. This is done to avoid disturbing the YMODEM serial
* protocol transactions.
*/
if (!(IS_ENABLED(CONFIG_SPL_BUILD) &&
IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
spl_boot_device() == BOOT_DEVICE_UART))
printf("Authentication passed\n");
}
#endif