| |
| .global _start |
| .global _stext |
| |
| .global _rambase |
| .global _ramvec |
| .global _ramstart |
| .global _ramend |
| |
| #ifdef CONFIG_INIT_LCD |
| .global splash_bits |
| #endif |
| |
| .data |
| |
| /* |
| * Set up the usable of RAM stuff. Size of RAM is determined then |
| * an initial stack set up at the end. |
| */ |
| .align 4 |
| _ramvec: |
| .long 0 |
| _rambase: |
| .long 0 |
| _ramstart: |
| .long 0 |
| _ramend: |
| .long 0 |
| |
| #define RAMEND (CONFIG_RAMBASE + CONFIG_RAMSIZE) |
| |
| #ifdef CONFIG_INIT_LCD |
| splash_bits: |
| #include "bootlogo.rh" |
| #endif |
| |
| .text |
| _start: |
| _stext: movew #0x2700,%sr |
| #ifdef CONFIG_INIT_LCD |
| movel #splash_bits, 0xfffffA00 /* LSSA */ |
| moveb #0x28, 0xfffffA05 /* LVPW */ |
| movew #0x280, 0xFFFFFa08 /* LXMAX */ |
| movew #0x1df, 0xFFFFFa0a /* LYMAX */ |
| moveb #0, 0xfffffa29 /* LBAR */ |
| moveb #0, 0xfffffa25 /* LPXCD */ |
| moveb #0x08, 0xFFFFFa20 /* LPICF */ |
| moveb #0x01, 0xFFFFFA21 /* -ve pol */ |
| moveb #0x81, 0xfffffA27 /* LCKCON */ |
| movew #0xff00, 0xfffff412 /* LCD pins */ |
| #endif |
| moveal #RAMEND-CONFIG_MEMORY_RESERVE*0x100000 - 0x10, %sp |
| movew #32767, %d0 /* PLL settle wait loop */ |
| 1: subq #1, %d0 |
| bne 1b |
| |
| /* Copy data segment from ROM to RAM */ |
| moveal #_etext, %a0 |
| moveal #_sdata, %a1 |
| moveal #_edata, %a2 |
| |
| /* Copy %a0 to %a1 until %a1 == %a2 */ |
| 1: movel %a0@+, %a1@+ |
| cmpal %a1, %a2 |
| bhi 1b |
| |
| moveal #_sbss, %a0 |
| moveal #_ebss, %a1 |
| /* Copy 0 to %a0 until %a0 == %a1 */ |
| |
| 1: |
| clrl %a0@+ |
| cmpal %a0, %a1 |
| bhi 1b |
| |
| movel #_sdata, %d0 |
| movel %d0, _rambase |
| movel #_ebss, %d0 |
| movel %d0, _ramstart |
| movel #RAMEND-CONFIG_MEMORY_RESERVE*0x100000, %d0 |
| movel %d0, _ramend |
| movel #CONFIG_VECTORBASE, %d0 |
| movel %d0, _ramvec |
| |
| /* |
| * load the current task pointer and stack |
| */ |
| lea init_thread_union, %a0 |
| lea 0x2000(%a0), %sp |
| |
| 1: jsr start_kernel |
| bra 1b |
| _exit: |
| |
| jmp _exit |
| |
| |
| putc: |
| moveb %d7,0xfffff907 |
| 1: |
| movew 0xfffff906, %d7 |
| andw #0x2000, %d7 |
| beq 1b |
| rts |
| |
| .data |
| env: |
| .long 0 |
| .text |
| |
