cpu/mcf52x2/start.S

1 /* SPDX-License-Identifier: GPL-2.0+ */
4  * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
7 #include <asm-offsets.h>
19 	moveml	%d0-%d7/%a0-%a6,%sp@;				\
22 	moveml	%sp@,%d0-%d7/%a0-%a6;				\
26 /* If we come from a pre-loader we don't need an initial exception
35  * These vectors are to catch any un-intended traps.
40 .long	_start - CONFIG_SYS_TEXT_BASE
136 	 * Setup code in SRAM to initialize FLASHBAR,
139 	move.l	#(_flashbar_setup-CONFIG_SYS_INT_FLASH_BASE), %a0
140 	move.l	#(_flashbar_setup_end-CONFIG_SYS_INT_FLASH_BASE), %a1
157 	/* Setup code to initialize FLASHBAR, if start from external Memory */
165 	 * if we come from a pre-loader we have no exception table and
188 	/* initialize general use internal ram */
198 	/* setup stack initially on top of internal static ram  */
205 	move.l	%sp, -(%sp)
209 	/* update stack and frame-pointers */
214 	move.l	%d0, -(%sp)
218 	/* run low-level CPU init code (from flash) */
222 	/* run low-level board init code (from flash) */
223 	clr.l	%sp@-
234  * This "function" does not return, instead it continues in RAM
235  * after relocating the monitor code.
253 	/* copy the code to RAM */
261  * initialization, now running from RAM.
264 	add.l	#(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
274 	add.l	#(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
276 	add.l	#(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
283 	 * fix got table in RAM
286 	add.l	#(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
290 	add.l	#(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
300 	/* calculate relative jump to board_init_r in ram */
302 	add.l	#(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
305 	move.l	%a0,-(%sp)		/* dest_addr */
306 	move.l	%d0,-(%sp)		/* gd */
315 /* exception code */
323 	movel	%sp,%sp@-
331 	movel	%sp,%sp@-