| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | .global _start |
| 3 | .global _stext |
| 4 | |
| 5 | .global _rambase |
| 6 | .global _ramvec |
| 7 | .global _ramstart |
| 8 | .global _ramend |
| 9 | |
| 10 | #ifdef CONFIG_INIT_LCD |
| 11 | .global splash_bits |
| 12 | #endif |
| 13 | |
| 14 | .data |
| 15 | |
| 16 | /* |
| 17 | * Set up the usable of RAM stuff. Size of RAM is determined then |
| 18 | * an initial stack set up at the end. |
| 19 | */ |
| 20 | .align 4 |
| 21 | _ramvec: |
| 22 | .long 0 |
| 23 | _rambase: |
| 24 | .long 0 |
| 25 | _ramstart: |
| 26 | .long 0 |
| 27 | _ramend: |
| 28 | .long 0 |
| 29 | |
| Greg Ungerer | 01f7e67 | 2006-06-27 13:27:02 +1000 | [diff] [blame] | 30 | #define RAMEND (CONFIG_RAMBASE + CONFIG_RAMSIZE) |
| 31 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #ifdef CONFIG_INIT_LCD |
| 33 | splash_bits: |
| 34 | #include "bootlogo.rh" |
| 35 | #endif |
| 36 | |
| 37 | .text |
| 38 | _start: |
| 39 | _stext: movew #0x2700,%sr |
| 40 | #ifdef CONFIG_INIT_LCD |
| 41 | movel #splash_bits, 0xfffffA00 /* LSSA */ |
| 42 | moveb #0x28, 0xfffffA05 /* LVPW */ |
| 43 | movew #0x280, 0xFFFFFa08 /* LXMAX */ |
| 44 | movew #0x1df, 0xFFFFFa0a /* LYMAX */ |
| 45 | moveb #0, 0xfffffa29 /* LBAR */ |
| 46 | moveb #0, 0xfffffa25 /* LPXCD */ |
| 47 | moveb #0x08, 0xFFFFFa20 /* LPICF */ |
| 48 | moveb #0x01, 0xFFFFFA21 /* -ve pol */ |
| 49 | moveb #0x81, 0xfffffA27 /* LCKCON */ |
| 50 | movew #0xff00, 0xfffff412 /* LCD pins */ |
| 51 | #endif |
| Greg Ungerer | 01f7e67 | 2006-06-27 13:27:02 +1000 | [diff] [blame] | 52 | moveal #RAMEND-CONFIG_MEMORY_RESERVE*0x100000 - 0x10, %sp |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | movew #32767, %d0 /* PLL settle wait loop */ |
| 54 | 1: subq #1, %d0 |
| 55 | bne 1b |
| 56 | |
| 57 | /* Copy data segment from ROM to RAM */ |
| 58 | moveal #_etext, %a0 |
| 59 | moveal #_sdata, %a1 |
| 60 | moveal #_edata, %a2 |
| 61 | |
| 62 | /* Copy %a0 to %a1 until %a1 == %a2 */ |
| 63 | 1: movel %a0@+, %a1@+ |
| 64 | cmpal %a1, %a2 |
| 65 | bhi 1b |
| 66 | |
| 67 | moveal #_sbss, %a0 |
| 68 | moveal #_ebss, %a1 |
| 69 | /* Copy 0 to %a0 until %a0 == %a1 */ |
| 70 | |
| 71 | 1: |
| 72 | clrl %a0@+ |
| 73 | cmpal %a0, %a1 |
| 74 | bhi 1b |
| 75 | |
| 76 | movel #_sdata, %d0 |
| Greg Ungerer | 01f7e67 | 2006-06-27 13:27:02 +1000 | [diff] [blame] | 77 | movel %d0, _rambase |
| 78 | movel #_ebss, %d0 |
| 79 | movel %d0, _ramstart |
| 80 | movel #RAMEND-CONFIG_MEMORY_RESERVE*0x100000, %d0 |
| 81 | movel %d0, _ramend |
| 82 | movel #CONFIG_VECTORBASE, %d0 |
| 83 | movel %d0, _ramvec |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | /* |
| 86 | * load the current task pointer and stack |
| 87 | */ |
| 88 | lea init_thread_union, %a0 |
| 89 | lea 0x2000(%a0), %sp |
| 90 | |
| 91 | 1: jsr start_kernel |
| 92 | bra 1b |
| 93 | _exit: |
| 94 | |
| 95 | jmp _exit |
| 96 | |
| 97 | |
| 98 | putc: |
| 99 | moveb %d7,0xfffff907 |
| 100 | 1: |
| 101 | movew 0xfffff906, %d7 |
| 102 | andw #0x2000, %d7 |
| 103 | beq 1b |
| 104 | rts |
| 105 | |
| 106 | .data |
| 107 | env: |
| 108 | .long 0 |
| 109 | .text |
| 110 | |