stm32/boards/ARDUINO_PORTENTA_H7: Enable 4MiB ROMFS part in ext flash.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.h

@@ -32,6 +32,11 @@ typedef unsigned int mp_uint_t;     // must be pointer size
 #define MICROPY_HW_ENTER_BOOTLOADER_VIA_RESET   (0)
 #define MICROPY_HW_TIM_IS_RESERVED(id) (id == 1)
 
+// ROMFS config
+#define MICROPY_HW_ROMFS_ENABLE_EXTERNAL_QSPI       (1)
+#define MICROPY_HW_ROMFS_QSPI_SPIFLASH_OBJ          (&spi_bdev.spiflash)
+#define MICROPY_HW_ROMFS_ENABLE_PART0               (1)
+
 // Flash storage config
 #define MICROPY_HW_SPIFLASH_ENABLE_CACHE            (1)
 #define MICROPY_HW_SPIFLASH_SOFT_RESET              (1)
@@ -129,8 +134,8 @@ void PORTENTA_board_osc_enable(int enable);
 // QSPI flash #1 for storage
 #define MICROPY_HW_QSPI_PRESCALER           (2) // 100MHz
 #define MICROPY_HW_QSPIFLASH_SIZE_BITS_LOG2 (27)
-// Reserve 1MiB at the end for compatibility with alternate firmware that places WiFi blob here.
-#define MICROPY_HW_SPIFLASH_SIZE_BITS       (120 * 1024 * 1024)
+// Reserve 4MiB for romfs and 1MiB for WiFi/BT firmware.
+#define MICROPY_HW_SPIFLASH_SIZE_BITS       (88 * 1024 * 1024)
 #define MICROPY_HW_QSPIFLASH_CS             (pyb_pin_QSPI2_CS)
 #define MICROPY_HW_QSPIFLASH_SCK            (pyb_pin_QSPI2_CLK)
 #define MICROPY_HW_QSPIFLASH_IO0            (pyb_pin_QSPI2_D0)

ports/stm32/boards/ARDUINO_PORTENTA_H7/stm32h747.ld

@@ -13,11 +13,11 @@ MEMORY
     SRAM3 (xrw)     : ORIGIN = 0x30040000, LENGTH = 32K     /* SRAM3 D2    */
     SRAM4 (xrw)     : ORIGIN = 0x38000000, LENGTH = 64K     /* SRAM4 D3    */
     FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 2048K   /* Total available flash */
-    FLASH_EXT (rx)  : ORIGIN = 0x90000000, LENGTH = 16384K  /* 16MBs external QSPI flash */
     FLASH_BL (rx)   : ORIGIN = 0x08000000, LENGTH = 128K    /* Arduino bootloader */
     FLASH_FS (r)    : ORIGIN = 0x08020000, LENGTH = 128K    /* filesystem */
     FLASH_TEXT (rx) : ORIGIN = 0x08040000, LENGTH = 1280K   /* CM7 firmware */
     FLASH_CM4 (rx)  : ORIGIN = 0x08180000, LENGTH = 512K    /* CM4 firmware */
+    FLASH_ROMFS (rx) : ORIGIN = 0x90B00000, LENGTH = 4096K   /* romfs partition in QSPI flash */
 }
 
 /* produce a link error if there is not this amount of RAM for these sections */
@@ -44,6 +44,10 @@ _micropy_hw_internal_flash_storage_ram_cache_end = ORIGIN(DTCM) + LENGTH(DTCM);
 _micropy_hw_internal_flash_storage_start = ORIGIN(FLASH_FS);
 _micropy_hw_internal_flash_storage_end = ORIGIN(FLASH_FS) + LENGTH(FLASH_FS);
 
+/* Location of romfs filesystem */
+_micropy_hw_romfs_part0_start = ORIGIN(FLASH_ROMFS);
+_micropy_hw_romfs_part0_size = LENGTH(FLASH_ROMFS);
+
 /* OpenAMP shared memory region */
 _openamp_shm_region_start = ORIGIN(SRAM4);
 _openamp_shm_region_end = ORIGIN(SRAM4) + LENGTH(SRAM4);