feat(stm32mp1): add define for external scratch buffer for nand devices
Override the default platform function to use an external buffer
on STM32MP13 platform.
It allows to use a temporary buffer located at the SRAM1 memory end.
Signed-off-by: Lionel Debieve <lionel.debieve@foss.st.com>
Change-Id: Ibd84bb336c60af24608268916b3a18bb5a0fa3db
diff --git a/plat/st/stm32mp1/stm32mp1_boot_device.c b/plat/st/stm32mp1/stm32mp1_boot_device.c
index b05de1c..ba53c7a 100644
--- a/plat/st/stm32mp1/stm32mp1_boot_device.c
+++ b/plat/st/stm32mp1/stm32mp1_boot_device.c
@@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-3-Clause
*/
+#include <assert.h>
#include <errno.h>
#include <common/debug.h>
@@ -15,6 +16,17 @@
#include <plat/common/platform.h>
#if STM32MP_RAW_NAND || STM32MP_SPI_NAND
+#if STM32MP13
+void plat_get_scratch_buffer(void **buffer_addr, size_t *buf_size)
+{
+ assert(buffer_addr != NULL);
+ assert(buf_size != NULL);
+
+ *buffer_addr = (void *)STM32MP_MTD_BUFFER;
+ *buf_size = PLATFORM_MTD_MAX_PAGE_SIZE;
+}
+#endif
+
static int get_data_from_otp(struct nand_device *nand_dev, bool is_slc)
{
uint32_t nand_param;
diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index 542895a..06660ce 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -194,6 +194,12 @@
/* Define maximum page size for NAND devices */
#define PLATFORM_MTD_MAX_PAGE_SIZE U(0x1000)
+/* Define location for the MTD scratch buffer */
+#if STM32MP13
+#define STM32MP_MTD_BUFFER (SRAM1_BASE + \
+ SRAM1_SIZE - \
+ PLATFORM_MTD_MAX_PAGE_SIZE)
+#endif
/*******************************************************************************
* STM32MP1 device/io map related constants (used for MMU)
******************************************************************************/