nios2/kernel/head.S

23 #include <asm/asm-offsets.h>
24 #include <asm/asm-macros.h>
27  * ZERO_PAGE is a special page that is used for zero-initialized
46 	.long	0
48  * Input(s): passed from u-boot
49  *   r4 - Optional pointer to a board information structure.
50  *   r5 - Optional pointer to the physical starting address of the init RAM
52  *   r6 - Optional pointer to the physical ending address of the init RAM
54  *   r7 - Optional pointer to the physical starting address of any kernel
55  *        command-line parameters.
59  * First executable code - detected and jumped to by the ROM bootstrap
60  * if the code resides in flash (looks for "Nios" at offset 0x0c from
78 	 * This is the default location for the exception handler. Code in jump
88 	stw	r3, r3save - helper(et)
106 	ldw	r3, r3save - helper2(et)
129 	beq	r1, r2,finish_move	/* We are running in RAM done */
130 	addi	r1, r1,(_start - chkadr)	/* Source */
142 	movia	r1, finish_move		/* VMA(_start)->l1 */
163 	movia	r1, nios2_boot_init	/* save args r4-r7 passed from u-boot */
174 	/* End of startup code */