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/*
* linux/arch/m68knommu/platform/68328/head-rom.S
* - A startup file for the MC68328
*
* Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,
* Kenneth Albanowski <kjahds@kjahds.com>,
* The Silver Hammer Group, Ltd.
*
* (c) 1995, Dionne & Associates
* (c) 1995, DKG Display Tech.
*/
#define ASSEMBLY
#define IMMED #
#define DBG_PUTC(x) moveb IMMED x, 0xfffff907
#include <linux/config.h>
.global _stext
.global _start
.global _rambase
.global __ramvec
.global _ramvec
.global _ramstart
.global _ramend
.global penguin_bits
#ifdef CONFIG_PILOT
#define IMR 0xFFFFF304
.data
.align 16
penguin_bits:
#include "bootlogo.rh"
#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
.text
_start:
_stext:
#ifdef CONFIG_M68328
#ifdef CONFIG_PILOT
.byte 0x4e, 0xfa, 0x00, 0x0a /* Jmp +X bytes */
.byte 'b', 'o', 'o', 't'
.word 10000
nop
#endif
moveq #0, %d0
movew %d0, 0xfffff618 /* Watchdog off */
movel #0x00011f07, 0xfffff114 /* CS A1 Mask */
movew #0x0800, 0xfffff906 /* Ignore CTS */
movew #0x010b, 0xfffff902 /* BAUD to 9600 */
movew #0x2410, 0xfffff200 /* PLLCR */
movew #0x123, 0xfffff202 /* PLLFSR */
#ifdef CONFIG_PILOT
moveb #0, 0xfffffA27 /* LCKCON */
movel #_start, 0xfffffA00 /* LSSA */
moveb #0xa, 0xfffffA05 /* LVPW */
movew #0x9f, 0xFFFFFa08 /* LXMAX */
movew #0x9f, 0xFFFFFa0a /* LYMAX */
moveb #9, 0xfffffa29 /* LBAR */
moveb #0, 0xfffffa25 /* LPXCD */
moveb #0x04, 0xFFFFFa20 /* LPICF */
moveb #0x58, 0xfffffA27 /* LCKCON */
moveb #0x85, 0xfffff429 /* PFDATA */
moveb #0xd8, 0xfffffA27 /* LCKCON */
moveb #0xc5, 0xfffff429 /* PFDATA */
moveb #0xd5, 0xfffff429 /* PFDATA */
moveal #0x00100000, %a3
moveal #0x100ffc00, %a4
#endif /* CONFIG_PILOT */
#endif /* CONFIG_M68328 */
movew #0x2700, %sr
lea %a4@(-4), %sp
DBG_PUTC('\r')
DBG_PUTC('\n')
DBG_PUTC('A')
moveq #0,%d0
movew #16384, %d0 /* PLL settle wait loop */
L0:
subw #1, %d0
bne L0
DBG_PUTC('B')
/* Copy command line from beginning of RAM (+16) to end of bss */
movel #__ramvec, %d7
addl #16, %d7
moveal %d7, %a0
moveal #_ebss, %a1
lea %a1@(512), %a2
DBG_PUTC('C')
/* Copy %a0 to %a1 until %a1 == %a2 */
L2:
movel %a0@+, %d0
movel %d0, %a1@+
cmpal %a1, %a2
bhi L2
/* Copy data+init segment from ROM to RAM */
moveal #_etext, %a0
moveal #_sdata, %a1
moveal #__init_end, %a2
DBG_PUTC('D')
/* Copy %a0 to %a1 until %a1 == %a2 */
LD1:
movel %a0@+, %d0
movel %d0, %a1@+
cmpal %a1, %a2
bhi LD1
DBG_PUTC('E')
moveal #_sbss, %a0
moveal #_ebss, %a1
/* Copy 0 to %a0 until %a0 == %a1 */
L1:
movel #0, %a0@+
cmpal %a0, %a1
bhi L1
DBG_PUTC('F')
/* Copy command line from end of bss to command line */
moveal #_ebss, %a0
moveal #command_line, %a1
lea %a1@(512), %a2
DBG_PUTC('G')
/* Copy %a0 to %a1 until %a1 == %a2 */
L3:
movel %a0@+, %d0
movel %d0, %a1@+
cmpal %a1, %a2
bhi L3
movel #_sdata, %d0
movel %d0, _rambase
movel #_ebss, %d0
movel %d0, _ramstart
movel %a4, %d0
subl #4096, %d0 /* Reserve 4K of stack */
moveq #79, %d7
movel %d0, _ramend
movel %a3, %d0
movel %d0, rom_length
pea 0
pea env
pea %sp@(4)
pea 0
DBG_PUTC('H')
#ifdef CONFIG_PILOT
movel #penguin_bits, 0xFFFFFA00
moveb #10, 0xFFFFFA05
movew #160, 0xFFFFFA08
movew #160, 0xFFFFFA0A
#endif /* CONFIG_PILOT */
DBG_PUTC('I')
lea init_thread_union, %a0
lea 0x2000(%a0), %sp
DBG_PUTC('J')
DBG_PUTC('\r')
DBG_PUTC('\n')
jsr start_kernel
_exit:
jmp _exit
.data
env:
.long 0
|
