Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * arch/alpha/boot/head.S | |
4 | * | |
5 | * initial bootloader stuff.. | |
6 | */ | |
7 | ||
c3d6b628 | 8 | #include <asm/pal.h> |
1da177e4 LT |
9 | |
10 | .set noreorder | |
11 | .globl __start | |
12 | .ent __start | |
13 | __start: | |
14 | br $29,2f | |
15 | 2: ldgp $29,0($29) | |
16 | jsr $26,start_kernel | |
17 | call_pal PAL_halt | |
18 | .end __start | |
19 | ||
20 | .align 5 | |
21 | .globl wrent | |
22 | .ent wrent | |
23 | wrent: | |
24 | .prologue 0 | |
25 | call_pal PAL_wrent | |
26 | ret ($26) | |
27 | .end wrent | |
28 | ||
29 | .align 5 | |
30 | .globl wrkgp | |
31 | .ent wrkgp | |
32 | wrkgp: | |
33 | .prologue 0 | |
34 | call_pal PAL_wrkgp | |
35 | ret ($26) | |
36 | .end wrkgp | |
37 | ||
38 | .align 5 | |
39 | .globl switch_to_osf_pal | |
40 | .ent switch_to_osf_pal | |
41 | switch_to_osf_pal: | |
42 | subq $30,128,$30 | |
43 | .frame $30,128,$26 | |
44 | stq $26,0($30) | |
45 | stq $1,8($30) | |
46 | stq $2,16($30) | |
47 | stq $3,24($30) | |
48 | stq $4,32($30) | |
49 | stq $5,40($30) | |
50 | stq $6,48($30) | |
51 | stq $7,56($30) | |
52 | stq $8,64($30) | |
53 | stq $9,72($30) | |
54 | stq $10,80($30) | |
55 | stq $11,88($30) | |
56 | stq $12,96($30) | |
57 | stq $13,104($30) | |
58 | stq $14,112($30) | |
59 | stq $15,120($30) | |
60 | .prologue 0 | |
61 | ||
62 | stq $30,0($17) /* save KSP in PCB */ | |
63 | ||
64 | bis $30,$30,$20 /* a4 = KSP */ | |
65 | br $17,1f | |
66 | ||
67 | ldq $26,0($30) | |
68 | ldq $1,8($30) | |
69 | ldq $2,16($30) | |
70 | ldq $3,24($30) | |
71 | ldq $4,32($30) | |
72 | ldq $5,40($30) | |
73 | ldq $6,48($30) | |
74 | ldq $7,56($30) | |
75 | ldq $8,64($30) | |
76 | ldq $9,72($30) | |
77 | ldq $10,80($30) | |
78 | ldq $11,88($30) | |
79 | ldq $12,96($30) | |
80 | ldq $13,104($30) | |
81 | ldq $14,112($30) | |
82 | ldq $15,120($30) | |
83 | addq $30,128,$30 | |
84 | ret ($26) | |
85 | 1: call_pal PAL_swppal | |
86 | .end switch_to_osf_pal | |
87 | ||
88 | .align 3 | |
89 | .globl tbi | |
90 | .ent tbi | |
91 | tbi: | |
92 | .prologue 0 | |
93 | call_pal PAL_tbi | |
94 | ret ($26) | |
95 | .end tbi | |
96 | ||
97 | .align 3 | |
98 | .globl halt | |
99 | .ent halt | |
100 | halt: | |
101 | .prologue 0 | |
102 | call_pal PAL_halt | |
103 | .end halt | |
104 | ||
105 | /* $16 - new stack page */ | |
106 | .align 3 | |
107 | .globl move_stack | |
108 | .ent move_stack | |
109 | move_stack: | |
110 | .prologue 0 | |
111 | lda $0, 0x1fff($31) | |
112 | and $0, $30, $1 /* Stack offset */ | |
113 | or $1, $16, $16 /* New stack pointer */ | |
114 | mov $30, $1 | |
115 | mov $16, $2 | |
116 | 1: ldq $3, 0($1) /* Move the stack */ | |
117 | addq $1, 8, $1 | |
118 | stq $3, 0($2) | |
119 | and $0, $1, $4 | |
120 | addq $2, 8, $2 | |
121 | bne $4, 1b | |
122 | mov $16, $30 | |
123 | ret ($26) | |
124 | .end move_stack |