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.global _start
.global _stext
.global _rambase
.global _ramvec
.global _ramstart
.global _ramend
#ifdef CONFIG_INIT_LCD
.global bootlogo_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)
.text
_start:
_stext: movew #0x2700,%sr
#ifdef CONFIG_INIT_LCD
movel #bootlogo_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 #__bss_start, %a0
moveal #__bss_stop, %a1
/* Copy 0 to %a0 until %a0 == %a1 */
1:
clrl %a0@+
cmpal %a0, %a1
bhi 1b
movel #_sdata, %d0
movel %d0, _rambase
movel #__bss_stop, %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
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