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
| /* SPDX-License-Identifier: GPL-2.0 */
| /*
| * arch/alpha/kernel/head.S
| *
| * initial boot stuff.. At this point, the bootloader has already
| * switched into OSF/1 PAL-code, and loaded us at the correct address
| * (START_ADDR). So there isn't much left for us to do: just set up
| * the kernel global pointer and jump to the kernel entry-point.
| */
|
| #include <linux/init.h>
| #include <asm/asm-offsets.h>
| #include <asm/pal.h>
| #include <asm/setup.h>
|
| __HEAD
| .globl _stext
| .set noreorder
| .globl __start
| .ent __start
| _stext:
| __start:
| .prologue 0
| br $27,1f
| 1: ldgp $29,0($27)
| /* We need to get current_task_info loaded up... */
| lda $8,init_thread_union
| /* ... and find our stack ... */
| lda $30,0x4000 - SIZEOF_PT_REGS($8)
| /* ... and then we can start the kernel. */
| jsr $26,start_kernel
| call_pal PAL_halt
| .end __start
|
| #ifdef CONFIG_SMP
| .align 3
| .globl __smp_callin
| .ent __smp_callin
| /* On entry here from SRM console, the HWPCB of the per-cpu
| slot for this processor has been loaded. We've arranged
| for the UNIQUE value for this process to contain the PCBB
| of the target idle task. */
| __smp_callin:
| .prologue 1
| ldgp $29,0($27) # First order of business, load the GP.
|
| call_pal PAL_rduniq # Grab the target PCBB.
| mov $0,$16 # Install it.
| call_pal PAL_swpctx
|
| lda $8,0x3fff # Find "current".
| bic $30,$8,$8
|
| jsr $26,smp_callin
| call_pal PAL_halt
| .end __smp_callin
| #endif /* CONFIG_SMP */
|
| #
| # The following two functions are needed for supporting SRM PALcode
| # on the PC164 (at least), since that PALcode manages the interrupt
| # masking, and we cannot duplicate the effort without causing problems
| #
|
| .align 3
| .globl cserve_ena
| .ent cserve_ena
| cserve_ena:
| .prologue 0
| bis $16,$16,$17
| lda $16,52($31)
| call_pal PAL_cserve
| ret ($26)
| .end cserve_ena
|
| .align 3
| .globl cserve_dis
| .ent cserve_dis
| cserve_dis:
| .prologue 0
| bis $16,$16,$17
| lda $16,53($31)
| call_pal PAL_cserve
| ret ($26)
| .end cserve_dis
|
| #
| # It is handy, on occasion, to make halt actually just loop.
| # Putting it here means we dont have to recompile the whole
| # kernel.
| #
|
| .align 3
| .globl halt
| .ent halt
| halt:
| .prologue 0
| call_pal PAL_halt
| .end halt
|
|
