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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2022 NXP
*/
#include <common.h>
#include <command.h>
#include <errno.h>
#include <asm/io.h>
#include <asm/mach-imx/s400_api.h>
#include <asm/mach-imx/sys_proto.h>
#include <asm/arch-imx/cpu.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/image.h>
#include <console.h>
#include <cpu_func.h>
#include <asm/mach-imx/ahab.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
#define IMG_CONTAINER_BASE (0x80000000UL)
#define IMG_CONTAINER_END_BASE (IMG_CONTAINER_BASE + 0xFFFFUL)
#define AHAB_NO_AUTHENTICATION_IND 0xee
#define AHAB_BAD_KEY_HASH_IND 0xfa
#define AHAB_INVALID_KEY_IND 0xf9
#define AHAB_BAD_SIGNATURE_IND 0xf0
#define AHAB_BAD_HASH_IND 0xf1
static void display_ahab_auth_ind(u32 event)
{
u8 resp_ind = (event >> 8) & 0xff;
switch (resp_ind) {
case AHAB_NO_AUTHENTICATION_IND:
printf("AHAB_NO_AUTHENTICATION_IND (0x%02X)\n\n", resp_ind);
break;
case AHAB_BAD_KEY_HASH_IND:
printf("AHAB_BAD_KEY_HASH_IND (0x%02X)\n\n", resp_ind);
break;
case AHAB_INVALID_KEY_IND:
printf("AHAB_INVALID_KEY_IND (0x%02X)\n\n", resp_ind);
break;
case AHAB_BAD_SIGNATURE_IND:
printf("AHAB_BAD_SIGNATURE_IND (0x%02X)\n\n", resp_ind);
break;
case AHAB_BAD_HASH_IND:
printf("AHAB_BAD_HASH_IND (0x%02X)\n\n", resp_ind);
break;
default:
printf("Unknown Indicator (0x%02X)\n\n", resp_ind);
break;
}
}
int ahab_auth_cntr_hdr(struct container_hdr *container, u16 length)
{
int err;
u32 resp;
memcpy((void *)IMG_CONTAINER_BASE, (const void *)container,
ALIGN(length, CONFIG_SYS_CACHELINE_SIZE));
flush_dcache_range(IMG_CONTAINER_BASE,
IMG_CONTAINER_BASE + ALIGN(length, CONFIG_SYS_CACHELINE_SIZE) - 1);
err = ahab_auth_oem_ctnr(IMG_CONTAINER_BASE,
&resp);
if (err) {
printf("Authenticate container hdr failed, return %d, resp 0x%x\n",
err, resp);
display_ahab_auth_ind(resp);
}
return err;
}
int ahab_auth_release(void)
{
int err;
u32 resp;
err = ahab_release_container(&resp);
if (err) {
printf("Error: release container failed, resp 0x%x!\n", resp);
display_ahab_auth_ind(resp);
}
return err;
}
int ahab_verify_cntr_image(struct boot_img_t *img, int image_index)
{
int err;
u32 resp;
err = ahab_verify_image(image_index, &resp);
if (err) {
printf("Authenticate img %d failed, return %d, resp 0x%x\n",
image_index, err, resp);
display_ahab_auth_ind(resp);
printf("auth debug stop\n");
asm volatile("b .");
return -EIO;
}
return 0;
}
static inline bool check_in_dram(ulong addr)
{
int i;
struct bd_info *bd = gd->bd;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; ++i) {
if (bd->bi_dram[i].size) {
if (addr >= bd->bi_dram[i].start &&
addr < (bd->bi_dram[i].start + bd->bi_dram[i].size))
return true;
}
}
return false;
}
int authenticate_os_container(ulong addr)
{
struct container_hdr *phdr;
int i, ret = 0;
int err;
u16 length;
struct boot_img_t *img;
unsigned long s, e;
if (addr % 4) {
puts("Error: Image's address is not 4 byte aligned\n");
return -EINVAL;
}
if (!check_in_dram(addr)) {
puts("Error: Image's address is invalid\n");
return -EINVAL;
}
phdr = (struct container_hdr *)addr;
if (phdr->tag != 0x87 || phdr->version != 0x0) {
printf("Error: Wrong container header\n");
return -EFAULT;
}
if (!phdr->num_images) {
printf("Error: Wrong container, no image found\n");
return -EFAULT;
}
length = phdr->length_lsb + (phdr->length_msb << 8);
debug("container length %u\n", length);
err = ahab_auth_cntr_hdr(phdr, length);
if (err) {
ret = -EIO;
goto exit;
}
debug("Verify images\n");
/* Copy images to dest address */
for (i = 0; i < phdr->num_images; i++) {
img = (struct boot_img_t *)(addr +
sizeof(struct container_hdr) +
i * sizeof(struct boot_img_t));
debug("img %d, dst 0x%x, src 0x%lx, size 0x%x\n",
i, (uint32_t) img->dst, img->offset + addr, img->size);
memcpy((void *)img->dst, (const void *)(img->offset + addr),
img->size);
s = img->dst & ~(CONFIG_SYS_CACHELINE_SIZE - 1);
e = ALIGN(img->dst + img->size, CONFIG_SYS_CACHELINE_SIZE) - 1;
flush_dcache_range(s, e);
ret = ahab_verify_cntr_image(img, i);
if (ret)
goto exit;
}
exit:
debug("ahab_auth_release, 0x%x\n", ret);
ahab_auth_release();
return ret;
}
static int do_authenticate(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong addr;
if (argc < 2)
return CMD_RET_USAGE;
addr = simple_strtoul(argv[1], NULL, 16);
printf("Authenticate OS container at 0x%lx\n", addr);
if (authenticate_os_container(addr))
return CMD_RET_FAILURE;
return CMD_RET_SUCCESS;
}
static void display_life_cycle(u32 lc)
{
printf("Lifecycle: 0x%08X, ", lc);
switch (lc) {
case 0x1:
printf("BLANK\n\n");
break;
case 0x2:
printf("FAB\n\n");
break;
case 0x4:
printf("NXP Provisioned\n\n");
break;
case 0x8:
printf("OEM Open\n\n");
break;
case 0x10:
printf("OEM Secure World Closed\n\n");
break;
case 0x20:
printf("OEM closed\n\n");
break;
case 0x40:
printf("Field Return OEM\n\n");
break;
case 0x80:
printf("Field Return NXP\n\n");
break;
case 0x100:
printf("OEM Locked\n\n");
break;
case 0x200:
printf("BRICKED\n\n");
break;
default:
printf("Unknown\n\n");
break;
}
}
static int confirm_close(void)
{
puts("Warning: Please ensure your sample is in NXP closed state, "
"OEM SRK hash has been fused, \n"
" and you are able to boot a signed image successfully "
"without any SECO events reported.\n"
" If not, your sample will be unrecoverable.\n"
"\nReally perform this operation? <y/N>\n");
if (confirm_yesno())
return 1;
puts("Ahab close aborted\n");
return 0;
}
static int do_ahab_close(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int err;
u32 resp;
if (!confirm_close())
return -EACCES;
err = ahab_forward_lifecycle(8, &resp);
if (err != 0) {
printf("Error in forward lifecycle to OEM closed\n");
return -EIO;
}
printf("Change to OEM closed successfully\n");
return 0;
}
int ahab_dump(void)
{
u32 buffer[32];
int ret, i = 0;
do {
ret = ahab_dump_buffer(buffer, 32);
if (ret < 0) {
printf("Error in dump AHAB log\n");
return -EIO;
}
if (ret == 1) {
break;
} else {
for (i = 0; i < ret; i++)
printf("0x%x\n", buffer[i]);
}
} while (ret >= 21);
return 0;
}
static int do_ahab_dump(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return ahab_dump();
}
static int do_ahab_status(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
u32 lc;
lc = gd->arch.lifecycle & 0xffff;
display_life_cycle(lc);
return 0;
}
U_BOOT_CMD(auth_cntr, CONFIG_SYS_MAXARGS, 1, do_authenticate,
"autenticate OS container via AHAB",
"addr\n"
"addr - OS container hex address\n"
);
U_BOOT_CMD(ahab_close, CONFIG_SYS_MAXARGS, 1, do_ahab_close,
"Change AHAB lifecycle to OEM closed",
""
);
U_BOOT_CMD(ahab_dump, CONFIG_SYS_MAXARGS, 1, do_ahab_dump,
"Dump AHAB log for debug",
""
);
U_BOOT_CMD(ahab_status, CONFIG_SYS_MAXARGS, 1, do_ahab_status,
"display AHAB lifecycle only",
""
);
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