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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [arch/] [alpha/] [boot/] [head.S] - Blame information for rev 1782

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Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* arch/alpha/boot/head.S`
3			`*`
4			`* initial bootloader stuff..`
5			`*/`
6
7			`#include`
8
9			`#define halt .long PAL_halt`
10
11			`.set noreorder`
12			`.globl __start`
13			`.ent __start`
14			`__start:`
15			`bis $31,$31,$31`
16			`br 1f`
17			`/* room for the initial PCB, which comes here */`
18			`.quad 0,0,0,0,0,0,0,0`
19			`1: br $27,2f`
20			`2: ldgp $29,0($27)`
21			`lda $27,start_kernel`
22			`jsr $26,($27),start_kernel`
23			`halt`
24			`.end __start`
25
26			`.align 5`
27			`.globl wrent`
28			`.ent wrent`
29			`wrent:`
30			`.long PAL_wrent`
31			`ret ($26)`
32			`.end wrent`
33
34			`.align 5`
35			`.globl wrkgp`
36			`.ent wrkgp`
37			`wrkgp:`
38			`.long PAL_wrkgp`
39			`ret ($26)`
40			`.end wrkgp`
41
42			`.align 5`
43			`.globl switch_to_osf_pal`
44			`.ent switch_to_osf_pal`
45			`switch_to_osf_pal:`
46			`subq $30,128,$30`
47			`stq $26,0($30)`
48			`stq $1,8($30)`
49			`stq $2,16($30)`
50			`stq $3,24($30)`
51			`stq $4,32($30)`
52			`stq $5,40($30)`
53			`stq $6,48($30)`
54			`stq $7,56($30)`
55			`stq $8,64($30)`
56			`stq $9,72($30)`
57			`stq $10,80($30)`
58			`stq $11,88($30)`
59			`stq $12,96($30)`
60			`stq $13,104($30)`
61			`stq $14,112($30)`
62			`stq $15,120($30)`
63
64			`stq $30,0($17) /* save KSP in PCB */`
65
66			`bis $30,$30,$20 /* a4 = KSP */`
67			`br $17,__do_swppal`
68
69			`ldq $26,0($30)`
70			`ldq $1,8($30)`
71			`ldq $2,16($30)`
72			`ldq $3,24($30)`
73			`ldq $4,32($30)`
74			`ldq $5,40($30)`
75			`ldq $6,48($30)`
76			`ldq $7,56($30)`
77			`ldq $8,64($30)`
78			`ldq $9,72($30)`
79			`ldq $10,80($30)`
80			`ldq $11,88($30)`
81			`ldq $12,96($30)`
82			`ldq $13,104($30)`
83			`ldq $14,112($30)`
84			`ldq $15,120($30)`
85			`addq $30,128,$30`
86			`ret ($26)`
87
88			`__do_swppal:`
89			`.long PAL_swppal`
90			`.end switch_to_osf_pal`
91
92			`.globl dispatch`
93			`.ent dispatch`
94			`dispatch:`
95			`subq $30,80,$30`
96			`stq $26,0($30)`
97			`stq $29,8($30)`
98
99			`stq $8,16($30)`
100			`stq $9,24($30)`
101			`stq $10,32($30)`
102			`stq $11,40($30)`
103			`stq $12,48($30)`
104			`stq $13,56($30)`
105			`stq $14,64($30)`
106			`stq $15,72($30)`
107
108			`lda $1,0x10000000 /* hwrpb */`
109			`ldq $2,0xc0($1) /* crb offset */`
110			`addq $2,$1,$2 /* crb */`
111			`ldq $27,0($2) /* dispatch procedure value */`
112
113			`ldq $2,8($27) /* dispatch call address */`
114			`jsr $26,($2) /* call it (weird VMS call seq) */`
115
116			`ldq $26,0($30)`
117			`ldq $29,8($30)`
118
119			`ldq $8,16($30)`
120			`ldq $9,24($30)`
121			`ldq $10,32($30)`
122			`ldq $11,40($30)`
123			`ldq $12,48($30)`
124			`ldq $13,56($30)`
125			`ldq $14,64($30)`
126			`ldq $15,72($30)`
127
128			`addq $30,80,$30`
129			`ret $31,($26)`
130			`.end dispatch`
131
132			`.align 3`
133			`.globl tbi`
134			`.ent tbi`
135			`tbi:`
136			`.long PAL_tbi`
137			`ret ($26)`
138			`.end tbi`
139

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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [arch/] [alpha/] [boot/] [head.S] - Blame information for rev 1782