git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 3c928320 MD |
1 | /* |
| 2 | * linux/arch/sh/boot/romimage/head.S | |
| 3 | * | |
| 4 | * Board specific setup code, executed before zImage loader | |
| 5 | */ | |
| 6 | ||
| 7 | .text | |
| 6a5a0b91 MD |
8 | #include <asm/page.h> |
| 9 | ||
| 3c928320 MD |
10 | .global romstart |
| 11 | romstart: | |
| 6a5a0b91 | 12 | /* include board specific setup code */ |
| 2d2bcd31 | 13 | #include <mach/romimage.h> |
| 6a5a0b91 | 14 | |
| 4705b2e8 MD |
15 | #ifdef CONFIG_ROMIMAGE_MMCIF |
| 16 | /* load the romImage to above the empty zero page */ | |
| 17 | mov.l empty_zero_page_dst, r4 | |
| 18 | mov.l empty_zero_page_dst_adj, r5 | |
| 19 | add r5, r4 | |
| 20 | mov.l bytes_to_load, r5 | |
| 21 | mov.l loader_function, r7 | |
| 22 | jsr @r7 | |
| 23 | mov r4, r15 | |
| 24 | ||
| 25 | mov.l empty_zero_page_dst, r4 | |
| 26 | mov.l empty_zero_page_dst_adj, r5 | |
| 27 | add r5, r4 | |
| 28 | mov.l loaded_code_offs, r5 | |
| 29 | add r5, r4 | |
| 30 | jmp @r4 | |
| 31 | nop | |
| 32 | ||
| 33 | .balign 4 | |
| 34 | empty_zero_page_dst_adj: | |
| 35 | .long PAGE_SIZE | |
| 36 | bytes_to_load: | |
| 37 | .long end_data - romstart | |
| 38 | loader_function: | |
| 39 | .long mmcif_loader | |
| 40 | loaded_code_offs: | |
| 41 | .long loaded_code - romstart | |
| 42 | loaded_code: | |
| 43 | #endif /* CONFIG_ROMIMAGE_MMCIF */ | |
| 44 | ||
| 6a5a0b91 | 45 | /* copy the empty_zero_page contents to where vmlinux expects it */ |
| b34bce45 MD |
46 | mova extra_data_pos, r0 |
| 47 | mov.l extra_data_size, r1 | |
| 48 | add r1, r0 | |
| 6a5a0b91 MD |
49 | mov.l empty_zero_page_dst, r1 |
| 50 | mov #(PAGE_SHIFT - 4), r4 | |
| 51 | mov #1, r3 | |
| 52 | shld r4, r3 /* r3 = PAGE_SIZE / 16 */ | |
| 53 | ||
| 54 | 1: | |
| 55 | mov.l @r0, r4 | |
| 56 | mov.l @(4, r0), r5 | |
| 57 | mov.l @(8, r0), r6 | |
| 58 | mov.l @(12, r0), r7 | |
| 59 | add #16,r0 | |
| 60 | mov.l r4, @r1 | |
| 61 | mov.l r5, @(4, r1) | |
| 62 | mov.l r6, @(8, r1) | |
| 63 | mov.l r7, @(12, r1) | |
| 64 | dt r3 | |
| 65 | add #16,r1 | |
| 66 | bf 1b | |
| 67 | ||
| 68 | /* jump to the zImage entry point located after the zero page data */ | |
| 69 | mov #PAGE_SHIFT, r4 | |
| 70 | mov #1, r1 | |
| 71 | shld r4, r1 | |
| b34bce45 MD |
72 | mova extra_data_pos, r0 |
| 73 | add r1, r0 | |
| 74 | mov.l extra_data_size, r1 | |
| 6a5a0b91 MD |
75 | add r1, r0 |
| 76 | jmp @r0 | |
| 77 | nop | |
| 78 | ||
| 79 | .align 2 | |
| 80 | empty_zero_page_dst: | |
| 81 | .long _text | |
| b34bce45 MD |
82 | extra_data_pos: |
| 83 | extra_data_size: | |
| 84 | .long zero_page_pos - extra_data_pos |