aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ia64/hp/sim/boot/boot_head.S
blob: 1c8c7e6a9a5ecaba963c20ba69d2e93c76c0994a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 * Copyright (C) 1998-2003 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */

#include <asm/asmmacro.h>

	.bss
	.align 16
stack_mem:
	.skip 16834

	.text

/* This needs to be defined because lib/string.c:strlcat() calls it in case of error... */
GLOBAL_ENTRY(printk)
	break 0
END(printk)

GLOBAL_ENTRY(_start)
	.prologue
	.save rp, r0
	.body
	movl gp = __gp
	movl sp = stack_mem+16384-16
	bsw.1
	br.call.sptk.many rp=start_bootloader
END(_start)

/*
 * Set a break point on this function so that symbols are available to set breakpoints in
 * the kernel being debugged.
 */
GLOBAL_ENTRY(debug_break)
	br.ret.sptk.many b0
END(debug_break)

GLOBAL_ENTRY(ssc)
	.regstk 5,0,0,0
	mov r15=in4
	break 0x80001
	br.ret.sptk.many b0
END(ssc)

GLOBAL_ENTRY(jmp_to_kernel)
	.regstk 2,0,0,0
	mov r28=in0
	mov b7=in1
	br.sptk.few b7
END(jmp_to_kernel)


GLOBAL_ENTRY(pal_emulator_static)
	mov r8=-1
	mov r9=256
	;;
	cmp.gtu p6,p7=r9,r28		/* r28 <= 255? */
(p6)	br.cond.sptk.few static
	;;
	mov r9=512
	;;
	cmp.gtu p6,p7=r9,r28
(p6)	br.cond.sptk.few stacked
	;;
static:	cmp.eq p6,p7=6,r28		/* PAL_PTCE_INFO */
(p7)	br.cond.sptk.few 1f
	;;
	mov r8=0			/* status = 0 */
	movl r9=0x100000000		/* tc.base */
	movl r10=0x0000000200000003	/* count[0], count[1] */
	movl r11=0x1000000000002000	/* stride[0], stride[1] */
	br.cond.sptk.few rp
1:	cmp.eq p6,p7=14,r28		/* PAL_FREQ_RATIOS */
(p7)	br.cond.sptk.few 1f
	mov r8=0			/* status = 0 */
	movl r9 =0x100000064		/* proc_ratio (1/100) */
	movl r10=0x100000100		/* bus_ratio<<32 (1/256) */
	movl r11=0x100000064		/* itc_ratio<<32 (1/100) */
	;;
1:	cmp.eq p6,p7=19,r28		/* PAL_RSE_INFO */
(p7)	br.cond.sptk.few 1f
	mov r8=0			/* status = 0 */
	mov r9=96			/* num phys stacked */
	mov r10=0			/* hints */
	mov r11=0
	br.cond.sptk.few rp
1:	cmp.eq p6,p7=1,r28		/* PAL_CACHE_FLUSH */
(p7)	br.cond.sptk.few 1f
	mov r9=ar.lc
	movl r8=524288			/* flush 512k million cache lines (16MB) */
	;;
	mov ar.lc=r8
	movl r8=0xe000000000000000
	;;
.loop:	fc r8
	add r8=32,r8
	br.cloop.sptk.few .loop
	sync.i
	;;
	srlz.i
	;;
	mov ar.lc=r9
	mov r8=r0
	;;
1:	cmp.eq p6,p7=15,r28		/* PAL_PERF_MON_INFO */
(p7)	br.cond.sptk.few 1f
	mov r8=0			/* status = 0 */
	movl r9 =0x08122f04		/* generic=4 width=47 retired=8 cycles=18 */
	mov r10=0			/* reserved */
	mov r11=0			/* reserved */
	mov r16=0xffff			/* implemented PMC */
	mov r17=0x3ffff			/* implemented PMD */
	add r18=8,r29			/* second index */
	;;
	st8 [r29]=r16,16		/* store implemented PMC */
	st8 [r18]=r0,16			/* clear remaining bits  */
	;;
	st8 [r29]=r0,16			/* clear remaining bits  */
	st8 [r18]=r0,16			/* clear remaining bits  */
	;;
	st8 [r29]=r17,16		/* store implemented PMD */
	st8 [r18]=r0,16			/* clear remaining bits  */
	mov r16=0xf0			/* cycles count capable PMC */
	;;
	st8 [r29]=r0,16			/* clear remaining bits  */
	st8 [r18]=r0,16			/* clear remaining bits  */
	mov r17=0xf0			/* retired bundles capable PMC */
	;;
	st8 [r29]=r16,16		/* store cycles capable */
	st8 [r18]=r0,16			/* clear remaining bits  */
	;;
	st8 [r29]=r0,16			/* clear remaining bits  */
	st8 [r18]=r0,16			/* clear remaining bits  */
	;;
	st8 [r29]=r17,16		/* store retired bundle capable */
	st8 [r18]=r0,16			/* clear remaining bits  */
	;;
	st8 [r29]=r0,16			/* clear remaining bits  */
	st8 [r18]=r0,16			/* clear remaining bits  */
	;;
1:	br.cond.sptk.few rp
stacked:
	br.ret.sptk.few rp
END(pal_emulator_static)