mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 07:57:21 +00:00
983e37007d
This moves what was in arch/arm/cpu/armv7/omap-common in to
arch/arm/mach-omap2 and moves
arch/arm/cpu/armv7/{am33xx,omap3,omap4,omap5} in to arch/arm/mach-omap2
as subdirectories. All refernces to the former locations are updated to
the current locations. For the logic to decide what our outputs are,
consolidate the tests into a single config.mk rather than including 4.
Signed-off-by: Tom Rini <trini@konsulko.com>
139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/*
|
|
*
|
|
* Common security related functions for OMAP devices
|
|
*
|
|
* (C) Copyright 2016
|
|
* Texas Instruments, <www.ti.com>
|
|
*
|
|
* Daniel Allred <d-allred@ti.com>
|
|
* Andreas Dannenberg <dannenberg@ti.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <stdarg.h>
|
|
|
|
#include <asm/arch/sys_proto.h>
|
|
#include <asm/omap_common.h>
|
|
#include <asm/omap_sec_common.h>
|
|
#include <asm/spl.h>
|
|
#include <spl.h>
|
|
|
|
/* Index for signature verify ROM API */
|
|
#define API_HAL_KM_VERIFYCERTIFICATESIGNATURE_INDEX (0x0000000E)
|
|
|
|
static uint32_t secure_rom_call_args[5] __aligned(ARCH_DMA_MINALIGN);
|
|
|
|
u32 secure_rom_call(u32 service, u32 proc_id, u32 flag, ...)
|
|
{
|
|
int i;
|
|
u32 num_args;
|
|
va_list ap;
|
|
|
|
va_start(ap, flag);
|
|
|
|
num_args = va_arg(ap, u32);
|
|
|
|
if (num_args > 4)
|
|
return 1;
|
|
|
|
/* Copy args to aligned args structure */
|
|
for (i = 0; i < num_args; i++)
|
|
secure_rom_call_args[i + 1] = va_arg(ap, u32);
|
|
|
|
secure_rom_call_args[0] = num_args;
|
|
|
|
va_end(ap);
|
|
|
|
/* if data cache is enabled, flush the aligned args structure */
|
|
flush_dcache_range(
|
|
(unsigned int)&secure_rom_call_args[0],
|
|
(unsigned int)&secure_rom_call_args[0] +
|
|
roundup(sizeof(secure_rom_call_args), ARCH_DMA_MINALIGN));
|
|
|
|
return omap_smc_sec(service, proc_id, flag, secure_rom_call_args);
|
|
}
|
|
|
|
static u32 find_sig_start(char *image, size_t size)
|
|
{
|
|
char *image_end = image + size;
|
|
char *sig_start_magic = "CERT_";
|
|
int magic_str_len = strlen(sig_start_magic);
|
|
char *ch;
|
|
|
|
while (--image_end > image) {
|
|
if (*image_end == '_') {
|
|
ch = image_end - magic_str_len + 1;
|
|
if (!strncmp(ch, sig_start_magic, magic_str_len))
|
|
return (u32)ch;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int secure_boot_verify_image(void **image, size_t *size)
|
|
{
|
|
int result = 1;
|
|
u32 cert_addr, sig_addr;
|
|
size_t cert_size;
|
|
|
|
/* Perform cache writeback on input buffer */
|
|
flush_dcache_range(
|
|
(u32)*image,
|
|
(u32)*image + roundup(*size, ARCH_DMA_MINALIGN));
|
|
|
|
cert_addr = (uint32_t)*image;
|
|
sig_addr = find_sig_start((char *)*image, *size);
|
|
|
|
if (sig_addr == 0) {
|
|
printf("No signature found in image!\n");
|
|
result = 1;
|
|
goto auth_exit;
|
|
}
|
|
|
|
*size = sig_addr - cert_addr; /* Subtract out the signature size */
|
|
cert_size = *size;
|
|
|
|
/* Check if image load address is 32-bit aligned */
|
|
if (!IS_ALIGNED(cert_addr, 4)) {
|
|
printf("Image is not 4-byte aligned!\n");
|
|
result = 1;
|
|
goto auth_exit;
|
|
}
|
|
|
|
/* Image size also should be multiple of 4 */
|
|
if (!IS_ALIGNED(cert_size, 4)) {
|
|
printf("Image size is not 4-byte aligned!\n");
|
|
result = 1;
|
|
goto auth_exit;
|
|
}
|
|
|
|
/* Call ROM HAL API to verify certificate signature */
|
|
debug("%s: load_addr = %x, size = %x, sig_addr = %x\n", __func__,
|
|
cert_addr, cert_size, sig_addr);
|
|
|
|
result = secure_rom_call(
|
|
API_HAL_KM_VERIFYCERTIFICATESIGNATURE_INDEX, 0, 0,
|
|
4, cert_addr, cert_size, sig_addr, 0xFFFFFFFF);
|
|
auth_exit:
|
|
if (result != 0) {
|
|
printf("Authentication failed!\n");
|
|
printf("Return Value = %08X\n", result);
|
|
hang();
|
|
}
|
|
|
|
/*
|
|
* Output notification of successful authentication as well the name of
|
|
* the signing certificate used 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: %s\n", (char *)sig_addr);
|
|
|
|
return result;
|
|
}
|