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/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/arch/sh/boot/romimage/head.S
*
* Board specific setup code, executed before zImage loader
*/
.text
#include <asm/page.h>
.global romstart
romstart:
/* include board specific setup code */
#include <mach/romimage.h>
#ifdef CONFIG_ROMIMAGE_MMCIF
/* load the romImage to above the empty zero page */
mov.l empty_zero_page_dst, r4
mov.l empty_zero_page_dst_adj, r5
add r5, r4
mov.l bytes_to_load, r5
mov.l loader_function, r7
jsr @r7
mov r4, r15
mov.l empty_zero_page_dst, r4
mov.l empty_zero_page_dst_adj, r5
add r5, r4
mov.l loaded_code_offs, r5
add r5, r4
jmp @r4
nop
.balign 4
empty_zero_page_dst_adj:
.long PAGE_SIZE
bytes_to_load:
.long end_data - romstart
loader_function:
.long mmcif_loader
loaded_code_offs:
.long loaded_code - romstart
loaded_code:
#endif /* CONFIG_ROMIMAGE_MMCIF */
/* copy the empty_zero_page contents to where vmlinux expects it */
mova extra_data_pos, r0
mov.l extra_data_size, r1
add r1, r0
mov.l empty_zero_page_dst, r1
mov #(PAGE_SHIFT - 4), r4
mov #1, r3
shld r4, r3 /* r3 = PAGE_SIZE / 16 */
1:
mov.l @r0, r4
mov.l @(4, r0), r5
mov.l @(8, r0), r6
mov.l @(12, r0), r7
add #16,r0
mov.l r4, @r1
mov.l r5, @(4, r1)
mov.l r6, @(8, r1)
mov.l r7, @(12, r1)
dt r3
add #16,r1
bf 1b
/* jump to the zImage entry point located after the zero page data */
mov #PAGE_SHIFT, r4
mov #1, r1
shld r4, r1
mova extra_data_pos, r0
add r1, r0
mov.l extra_data_size, r1
add r1, r0
jmp @r0
nop
.align 2
empty_zero_page_dst:
.long _text
extra_data_pos:
extra_data_size:
.long zero_page_pos - extra_data_pos
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