Merge changes from topic "fwu-refactor" into integration
* changes:
refactor(plat/arm): use mmio* functions to read/write NVFLAGS registers
refactor(plat/arm): mark the flash region as read-only
refactor(plat/arm): update NV flags on image load/authentication failure
diff --git a/plat/arm/board/fvp/fvp_bl1_setup.c b/plat/arm/board/fvp/fvp_bl1_setup.c
index e713bbc..06ee037 100644
--- a/plat/arm/board/fvp/fvp_bl1_setup.c
+++ b/plat/arm/board/fvp/fvp_bl1_setup.c
@@ -1,15 +1,17 @@
/*
- * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
+#include <errno.h>
#include <bl1/bl1.h>
#include <common/tbbr/tbbr_img_def.h>
#include <drivers/arm/smmu_v3.h>
#include <drivers/arm/sp805.h>
+#include <lib/mmio.h>
#include <plat/arm/common/arm_config.h>
#include <plat/arm/common/plat_arm.h>
#include <plat/arm/common/arm_def.h>
@@ -61,6 +63,12 @@
__dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved)
{
+ uint32_t nv_flags = mmio_read_32(V2M_SYS_NVFLAGS_ADDR);
+
+ /* Clear the NV flags register. */
+ mmio_write_32((V2M_SYSREGS_BASE + V2M_SYS_NVFLAGSCLR),
+ nv_flags);
+
/* Setup the watchdog to reset the system as soon as possible */
sp805_refresh(ARM_SP805_TWDG_BASE, 1U);
@@ -124,3 +132,15 @@
return 0;
}
#endif /* MEASURED_BOOT */
+
+/*******************************************************************************
+ * The following function checks if Firmware update is needed by checking error
+ * reported in NV flag.
+ ******************************************************************************/
+bool plat_arm_bl1_fwu_needed(void)
+{
+ int32_t nv_flags = (int32_t)mmio_read_32(V2M_SYS_NVFLAGS_ADDR);
+
+ /* if image load/authentication failed */
+ return ((nv_flags == -EAUTH) || (nv_flags == -ENOENT));
+}
diff --git a/plat/arm/board/fvp/fvp_common.c b/plat/arm/board/fvp/fvp_common.c
index fe0903b..9d3c031 100644
--- a/plat/arm/board/fvp/fvp_common.c
+++ b/plat/arm/board/fvp/fvp_common.c
@@ -72,14 +72,11 @@
* Table of memory regions for various BL stages to map using the MMU.
* This doesn't include Trusted SRAM as setup_page_tables() already takes care
* of mapping it.
- *
- * The flash needs to be mapped as writable in order to erase the FIP's Table of
- * Contents in case of unrecoverable error (see plat_error_handler()).
*/
#ifdef IMAGE_BL1
const mmap_region_t plat_arm_mmap[] = {
ARM_MAP_SHARED_RAM,
- V2M_MAP_FLASH0_RW,
+ V2M_MAP_FLASH0_RO,
V2M_MAP_IOFPGA,
MAP_DEVICE0,
#if FVP_INTERCONNECT_DRIVER == FVP_CCN
diff --git a/plat/arm/board/fvp/fvp_err.c b/plat/arm/board/fvp/fvp_err.c
index 2928b3a..1f9f0dd 100644
--- a/plat/arm/board/fvp/fvp_err.c
+++ b/plat/arm/board/fvp/fvp_err.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2019-2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2021, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -9,6 +9,7 @@
#include <common/debug.h>
#include <drivers/arm/sp805.h>
#include <drivers/cfi/v2m_flash.h>
+#include <lib/mmio.h>
#include <plat/arm/common/plat_arm.h>
#include <platform_def.h>
@@ -17,25 +18,8 @@
*/
__dead2 void plat_arm_error_handler(int err)
{
- int ret;
-
- switch (err) {
- case -ENOENT:
- case -EAUTH:
- /* Image load or authentication error. Erase the ToC */
- INFO("Erasing FIP ToC from flash...\n");
- (void)nor_unlock(PLAT_ARM_FLASH_IMAGE_BASE);
- ret = nor_word_program(PLAT_ARM_FLASH_IMAGE_BASE, 0);
- if (ret != 0) {
- ERROR("Cannot erase ToC\n");
- } else {
- INFO("Done\n");
- }
- break;
- default:
- /* Unexpected error */
- break;
- }
+ /* Propagate the err code in the NV-flags register */
+ mmio_write_32(V2M_SYS_NVFLAGS_ADDR, (uint32_t)err);
console_flush();
diff --git a/plat/arm/board/juno/juno_bl1_setup.c b/plat/arm/board/juno/juno_bl1_setup.c
index 2234055..a9d5cc3 100644
--- a/plat/arm/board/juno/juno_bl1_setup.c
+++ b/plat/arm/board/juno/juno_bl1_setup.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -62,11 +62,11 @@
******************************************************************************/
bool plat_arm_bl1_fwu_needed(void)
{
- const int32_t *nv_flags_ptr = (const int32_t *)V2M_SYS_NVFLAGS_ADDR;
+ int32_t nv_flags = (int32_t)mmio_read_32(V2M_SYS_NVFLAGS_ADDR);
/* Check if TOC is invalid or watchdog reset happened. */
- return (!arm_io_is_toc_valid() || (((*nv_flags_ptr == -EAUTH) ||
- (*nv_flags_ptr == -ENOENT)) && is_watchdog_reset()));
+ return (!arm_io_is_toc_valid() || (((nv_flags == -EAUTH) ||
+ (nv_flags == -ENOENT)) && is_watchdog_reset()));
}
/*******************************************************************************
@@ -86,13 +86,11 @@
******************************************************************************/
__dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved)
{
- unsigned int *nv_flags_clr = (unsigned int *)
- (V2M_SYSREGS_BASE + V2M_SYS_NVFLAGSCLR);
- unsigned int *nv_flags_ptr = (unsigned int *)
- (V2M_SYSREGS_BASE + V2M_SYS_NVFLAGS);
+ uint32_t nv_flags = mmio_read_32(V2M_SYS_NVFLAGS_ADDR);
/* Clear the NV flags register. */
- *nv_flags_clr = *nv_flags_ptr;
+ mmio_write_32((V2M_SYSREGS_BASE + V2M_SYS_NVFLAGSCLR),
+ nv_flags);
/* Setup the watchdog to reset the system as soon as possible */
sp805_refresh(ARM_SP805_TWDG_BASE, 1U);
diff --git a/plat/arm/board/juno/juno_err.c b/plat/arm/board/juno/juno_err.c
index 60699cc..02d751e 100644
--- a/plat/arm/board/juno/juno_err.c
+++ b/plat/arm/board/juno/juno_err.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -16,10 +16,8 @@
*/
void __dead2 plat_arm_error_handler(int err)
{
- uint32_t *flags_ptr = (uint32_t *)V2M_SYS_NVFLAGS_ADDR;
-
/* Propagate the err code in the NV-flags register */
- *flags_ptr = err;
+ mmio_write_32(V2M_SYS_NVFLAGS_ADDR, (uint32_t)err);
/* Setup the watchdog to reset the system as soon as possible */
sp805_refresh(ARM_SP805_TWDG_BASE, 1U);