flash/nor: implement flash bank deallocation on OpenOCD exit

Change-Id: I8fcf09b2a85b3b68743f5fd68a31edea933b9b17
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4414
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>

src/flash/nor/core.c

@@ -171,6 +171,31 @@ int flash_get_bank_count(void)
 	return i;
 }
 
+void default_flash_free_driver_priv(struct flash_bank *bank)
+{
+	free(bank->driver_priv);
+	bank->driver_priv = NULL;
+}
+
+void flash_free_all_banks(void)
+{
+	struct flash_bank *bank = flash_banks;
+	while (bank) {
+		struct flash_bank *next = bank->next;
+		if (bank->driver->free_driver_priv)
+			bank->driver->free_driver_priv(bank);
+		else
+			LOG_WARNING("Flash driver of %s does not support free_driver_priv()", bank->name);
+
+		free(bank->name);
+		free(bank->sectors);
+		free(bank->prot_blocks);
+		free(bank);
+		bank = next;
+	}
+	flash_banks = NULL;
+}
+
 struct flash_bank *get_flash_bank_by_name_noprobe(const char *name)
 {
 	unsigned requested = get_flash_name_index(name);

src/flash/nor/core.h

@@ -76,7 +76,7 @@ struct flash_sector {
  * per-bank basis, if required.
  */
 struct flash_bank {
-	const char *name;
+	char *name;
 
 	struct target *target; /**< Target to which this bank belongs. */
 
@@ -153,8 +153,15 @@ int flash_write(struct target *target,
  * This routine must be called when the system may modify the status.
  */
 void flash_set_dirty(void);
+
 /** @returns The number of flash banks currently defined. */
 int flash_get_bank_count(void);
+
+/** Deallocates bank->driver_priv */
+void default_flash_free_driver_priv(struct flash_bank *bank);
+
+/** Deallocates all flash banks */
+void flash_free_all_banks(void);
 /**
  * Provides default read implementation for flash memory.
  * @param bank The bank to read.

src/flash/nor/driver.h

@@ -209,6 +209,14 @@ struct flash_driver {
 	 * @returns ERROR_OK if successful; otherwise, an error code.
 	 */
 	int (*auto_probe)(struct flash_bank *bank);
+
+	/**
+	 * Deallocates private driver structures.
+	 * Use default_flash_free_driver_priv() to simply free(bank->driver_priv)
+	 *
+	 * @param bank - the bank being destroyed
+	 */
+	void (*free_driver_priv)(struct flash_bank *bank);
 };
 
 #define FLASH_BANK_COMMAND_HANDLER(name) \

src/openocd.c

@@ -353,6 +353,7 @@ int openocd_main(int argc, char *argv[])
 	/* Start the executable meat that can evolve into thread in future. */
 	ret = openocd_thread(argc, argv, cmd_ctx);
 
+	flash_free_all_banks();
 	gdb_service_free();
 	server_free();