1#include <linux/linkage.h>
2
3#include <asm/entry.h>
4#include <asm/page.h>
5#include <asm/contregs.h>
6#include <asm/sun3-head.h>
7
8PSL_HIGHIPL     = 0x2700
9NBSG            = 0x20000
10ICACHE_ONLY	= 0x00000009
11CACHES_OFF	= 0x00000008	| actually a clear and disable --m
12#define MAS_STACK INT_STACK
13ROOT_TABLE_SIZE = 128
14PAGESIZE	= 8192
15SUN3_INVALID_PMEG = 255
16.globl bootup_user_stack
17.globl bootup_kernel_stack
18.globl pg0
19.globl swapper_pg_dir
20.globl kernel_pmd_table
21.globl availmem
22.global m68k_pgtable_cachemode
23.global kpt
24| todo: all these should be in bss!
25swapper_pg_dir:                .skip 0x2000
26pg0:                           .skip 0x2000
27kernel_pmd_table:              .skip 0x2000
28
29.globl kernel_pg_dir
30.equ    kernel_pg_dir,kernel_pmd_table
31
32	.section .head
33ENTRY(_stext)
34ENTRY(_start)
35
36/* Firstly, disable interrupts and set up function codes. */
37	movew	#PSL_HIGHIPL, %sr
38	moveq	#FC_CONTROL, %d0
39	movec	%d0, %sfc
40	movec	%d0, %dfc
41
42/* Make sure we're in context zero. */
43	moveq	#0, %d0
44	movsb	%d0, AC_CONTEXT
45
46/* map everything the bootloader left us into high memory, clean up the
47   excess later */
48	lea	(AC_SEGMAP+0),%a0
49	lea	(AC_SEGMAP+KERNBASE),%a1
501:
51	movsb	%a0@, %d1
52	movsb	%d1, %a1@
53	cmpib	#SUN3_INVALID_PMEG, %d1
54	beq	2f
55	addl	#NBSG,%a0
56	addl	#NBSG,%a1
57	jmp	1b
58
592:
60
61/* Disable caches and jump to high code. */
62	moveq	#ICACHE_ONLY,%d0	| Cache disabled until we're ready to enable it
63	movc	%d0, %cacr	|   is this the right value? (yes --m)
64	jmp	1f:l
65
66/* Following code executes at high addresses (0xE000xxx). */
671:	lea	init_task,%curptr			| get initial thread...
68	lea	init_thread_union+THREAD_SIZE,%sp	| ...and its stack.
69
70/* Point MSP at an invalid page to trap if it's used. --m */
71	movl	#(PAGESIZE),%d0
72	movc	%d0,%msp
73	moveq	#-1,%d0
74	movsb	%d0,(AC_SEGMAP+0x0)
75
76	jbsr	sun3_init
77
78	jbsr	base_trap_init
79
80        jbsr    start_kernel
81	trap	#15
82
83        .data
84        .even
85kpt:
86        .long 0
87availmem:
88        .long 0
89| todo: remove next two. --m
90is_medusa:
91        .long 0
92m68k_pgtable_cachemode:
93        .long 0
94