Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * arch/alpha/boot/head.S | |
3 | * | |
4 | * initial bootloader stuff.. | |
5 | */ | |
6 | ||
c3d6b628 | 7 | #include <asm/pal.h> |
1da177e4 LT |
8 | |
9 | .set noreorder | |
10 | .globl __start | |
11 | .ent __start | |
12 | __start: | |
13 | br $29,2f | |
14 | 2: ldgp $29,0($29) | |
15 | jsr $26,start_kernel | |
16 | call_pal PAL_halt | |
17 | .end __start | |
18 | ||
19 | .align 5 | |
20 | .globl wrent | |
21 | .ent wrent | |
22 | wrent: | |
23 | .prologue 0 | |
24 | call_pal PAL_wrent | |
25 | ret ($26) | |
26 | .end wrent | |
27 | ||
28 | .align 5 | |
29 | .globl wrkgp | |
30 | .ent wrkgp | |
31 | wrkgp: | |
32 | .prologue 0 | |
33 | call_pal PAL_wrkgp | |
34 | ret ($26) | |
35 | .end wrkgp | |
36 | ||
37 | .align 5 | |
38 | .globl switch_to_osf_pal | |
39 | .ent switch_to_osf_pal | |
40 | switch_to_osf_pal: | |
41 | subq $30,128,$30 | |
42 | .frame $30,128,$26 | |
43 | stq $26,0($30) | |
44 | stq $1,8($30) | |
45 | stq $2,16($30) | |
46 | stq $3,24($30) | |
47 | stq $4,32($30) | |
48 | stq $5,40($30) | |
49 | stq $6,48($30) | |
50 | stq $7,56($30) | |
51 | stq $8,64($30) | |
52 | stq $9,72($30) | |
53 | stq $10,80($30) | |
54 | stq $11,88($30) | |
55 | stq $12,96($30) | |
56 | stq $13,104($30) | |
57 | stq $14,112($30) | |
58 | stq $15,120($30) | |
59 | .prologue 0 | |
60 | ||
61 | stq $30,0($17) /* save KSP in PCB */ | |
62 | ||
63 | bis $30,$30,$20 /* a4 = KSP */ | |
64 | br $17,1f | |
65 | ||
66 | ldq $26,0($30) | |
67 | ldq $1,8($30) | |
68 | ldq $2,16($30) | |
69 | ldq $3,24($30) | |
70 | ldq $4,32($30) | |
71 | ldq $5,40($30) | |
72 | ldq $6,48($30) | |
73 | ldq $7,56($30) | |
74 | ldq $8,64($30) | |
75 | ldq $9,72($30) | |
76 | ldq $10,80($30) | |
77 | ldq $11,88($30) | |
78 | ldq $12,96($30) | |
79 | ldq $13,104($30) | |
80 | ldq $14,112($30) | |
81 | ldq $15,120($30) | |
82 | addq $30,128,$30 | |
83 | ret ($26) | |
84 | 1: call_pal PAL_swppal | |
85 | .end switch_to_osf_pal | |
86 | ||
87 | .align 3 | |
88 | .globl tbi | |
89 | .ent tbi | |
90 | tbi: | |
91 | .prologue 0 | |
92 | call_pal PAL_tbi | |
93 | ret ($26) | |
94 | .end tbi | |
95 | ||
96 | .align 3 | |
97 | .globl halt | |
98 | .ent halt | |
99 | halt: | |
100 | .prologue 0 | |
101 | call_pal PAL_halt | |
102 | .end halt | |
103 | ||
104 | /* $16 - new stack page */ | |
105 | .align 3 | |
106 | .globl move_stack | |
107 | .ent move_stack | |
108 | move_stack: | |
109 | .prologue 0 | |
110 | lda $0, 0x1fff($31) | |
111 | and $0, $30, $1 /* Stack offset */ | |
112 | or $1, $16, $16 /* New stack pointer */ | |
113 | mov $30, $1 | |
114 | mov $16, $2 | |
115 | 1: ldq $3, 0($1) /* Move the stack */ | |
116 | addq $1, 8, $1 | |
117 | stq $3, 0($2) | |
118 | and $0, $1, $4 | |
119 | addq $2, 8, $2 | |
120 | bne $4, 1b | |
121 | mov $16, $30 | |
122 | ret ($26) | |
123 | .end move_stack |