.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