| Magnus Damm | 3c92832 | 2009-07-29 15:04:05 +0000 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/sh/boot/romimage/head.S |
| 3 | * |
| 4 | * Board specific setup code, executed before zImage loader |
| 5 | */ |
| 6 | |
| 7 | .text |
| Magnus Damm | 6a5a0b9 | 2009-12-04 06:42:35 +0000 | [diff] [blame] | 8 | #include <asm/page.h> |
| 9 | |
| Magnus Damm | 3c92832 | 2009-07-29 15:04:05 +0000 | [diff] [blame] | 10 | .global romstart |
| 11 | romstart: |
| Magnus Damm | 6a5a0b9 | 2009-12-04 06:42:35 +0000 | [diff] [blame] | 12 | /* include board specific setup code */ |
| Magnus Damm | 2d2bcd3 | 2009-08-07 03:58:38 +0900 | [diff] [blame] | 13 | #include <mach/romimage.h> |
| Magnus Damm | 6a5a0b9 | 2009-12-04 06:42:35 +0000 | [diff] [blame] | 14 | |
| 15 | /* copy the empty_zero_page contents to where vmlinux expects it */ |
| Magnus Damm | b34bce4 | 2010-05-18 14:42:40 +0000 | [diff] [blame^] | 16 | mova extra_data_pos, r0 |
| 17 | mov.l extra_data_size, r1 |
| 18 | add r1, r0 |
| Magnus Damm | 6a5a0b9 | 2009-12-04 06:42:35 +0000 | [diff] [blame] | 19 | mov.l empty_zero_page_dst, r1 |
| 20 | mov #(PAGE_SHIFT - 4), r4 |
| 21 | mov #1, r3 |
| 22 | shld r4, r3 /* r3 = PAGE_SIZE / 16 */ |
| 23 | |
| 24 | 1: |
| 25 | mov.l @r0, r4 |
| 26 | mov.l @(4, r0), r5 |
| 27 | mov.l @(8, r0), r6 |
| 28 | mov.l @(12, r0), r7 |
| 29 | add #16,r0 |
| 30 | mov.l r4, @r1 |
| 31 | mov.l r5, @(4, r1) |
| 32 | mov.l r6, @(8, r1) |
| 33 | mov.l r7, @(12, r1) |
| 34 | dt r3 |
| 35 | add #16,r1 |
| 36 | bf 1b |
| 37 | |
| 38 | /* jump to the zImage entry point located after the zero page data */ |
| 39 | mov #PAGE_SHIFT, r4 |
| 40 | mov #1, r1 |
| 41 | shld r4, r1 |
| Magnus Damm | b34bce4 | 2010-05-18 14:42:40 +0000 | [diff] [blame^] | 42 | mova extra_data_pos, r0 |
| 43 | add r1, r0 |
| 44 | mov.l extra_data_size, r1 |
| Magnus Damm | 6a5a0b9 | 2009-12-04 06:42:35 +0000 | [diff] [blame] | 45 | add r1, r0 |
| 46 | jmp @r0 |
| 47 | nop |
| 48 | |
| 49 | .align 2 |
| 50 | empty_zero_page_dst: |
| 51 | .long _text |
| Magnus Damm | b34bce4 | 2010-05-18 14:42:40 +0000 | [diff] [blame^] | 52 | extra_data_pos: |
| 53 | extra_data_size: |
| 54 | .long zero_page_pos - extra_data_pos |