1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
225 lines
3.7 KiB
ArmAsm
225 lines
3.7 KiB
ArmAsm
/*
|
|
* 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
|