Commit | Line | Data |
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1c51ed4f MD |
1 | /* |
2 | * SMP support for R-Mobile / SH-Mobile | |
3 | * | |
4 | * Copyright (C) 2010 Magnus Damm | |
5 | * Copyright (C) 2010 Takashi Yoshii | |
6 | * | |
7 | * Based on vexpress, Copyright (c) 2003 ARM Limited, All Rights Reserved | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
1c51ed4f | 13 | #include <linux/init.h> |
8b438bcb MD |
14 | #include <linux/linkage.h> |
15 | #include <linux/threads.h> | |
6ebbf2ce | 16 | #include <asm/assembler.h> |
6155f77d | 17 | #include <asm/memory.h> |
1c51ed4f | 18 | |
8b438bcb | 19 | #ifdef CONFIG_SMP |
e994d5eb MD |
20 | ENTRY(shmobile_invalidate_start) |
21 | bl v7_invalidate_l1 | |
22 | b secondary_startup | |
23 | ENDPROC(shmobile_invalidate_start) | |
8b438bcb | 24 | #endif |
e994d5eb | 25 | |
1c51ed4f MD |
26 | /* |
27 | * Reset vector for secondary CPUs. | |
28 | * This will be mapped at address 0 by SBAR register. | |
29 | * We need _long_ jump to the physical address. | |
30 | */ | |
c1d7e2e8 | 31 | .arm |
1c51ed4f | 32 | .align 12 |
ebe72ab9 MD |
33 | ENTRY(shmobile_boot_vector) |
34 | ldr r0, 2f | |
c1d7e2e8 TK |
35 | ldr r1, 1f |
36 | bx r1 | |
37 | ||
ebe72ab9 MD |
38 | ENDPROC(shmobile_boot_vector) |
39 | ||
0b933cb3 | 40 | .align 2 |
ebe72ab9 MD |
41 | .globl shmobile_boot_fn |
42 | shmobile_boot_fn: | |
43 | 1: .space 4 | |
44 | .globl shmobile_boot_arg | |
45 | shmobile_boot_arg: | |
46 | 2: .space 4 | |
a84a5ab7 MD |
47 | .globl shmobile_boot_size |
48 | shmobile_boot_size: | |
49 | .long . - shmobile_boot_vector | |
cc61591e MD |
50 | |
51 | /* | |
52 | * Per-CPU SMP boot function/argument selection code based on MPIDR | |
53 | */ | |
54 | ||
55 | ENTRY(shmobile_smp_boot) | |
56 | @ r0 = MPIDR_HWID_BITMASK | |
57 | mrc p15, 0, r1, c0, c0, 5 @ r1 = MPIDR | |
58 | and r0, r1, r0 @ r0 = cpu_logical_map() value | |
59 | mov r1, #0 @ r1 = CPU index | |
60 | adr r5, 1f @ array of per-cpu mpidr values | |
61 | adr r6, 2f @ array of per-cpu functions | |
62 | adr r7, 3f @ array of per-cpu arguments | |
63 | ||
64 | shmobile_smp_boot_find_mpidr: | |
65 | ldr r8, [r5, r1, lsl #2] | |
66 | cmp r8, r0 | |
67 | bne shmobile_smp_boot_next | |
68 | ||
69 | ldr r9, [r6, r1, lsl #2] | |
70 | cmp r9, #0 | |
71 | bne shmobile_smp_boot_found | |
72 | ||
73 | shmobile_smp_boot_next: | |
74 | add r1, r1, #1 | |
8b438bcb | 75 | cmp r1, #NR_CPUS |
cc61591e MD |
76 | blo shmobile_smp_boot_find_mpidr |
77 | ||
78 | b shmobile_smp_sleep | |
79 | ||
80 | shmobile_smp_boot_found: | |
81 | ldr r0, [r7, r1, lsl #2] | |
6ebbf2ce | 82 | ret r9 |
cc61591e MD |
83 | ENDPROC(shmobile_smp_boot) |
84 | ||
85 | ENTRY(shmobile_smp_sleep) | |
86 | wfi | |
87 | b shmobile_smp_boot | |
88 | ENDPROC(shmobile_smp_sleep) | |
89 | ||
90 | .globl shmobile_smp_mpidr | |
91 | shmobile_smp_mpidr: | |
8b438bcb | 92 | 1: .space NR_CPUS * 4 |
cc61591e MD |
93 | .globl shmobile_smp_fn |
94 | shmobile_smp_fn: | |
8b438bcb | 95 | 2: .space NR_CPUS * 4 |
cc61591e MD |
96 | .globl shmobile_smp_arg |
97 | shmobile_smp_arg: | |
8b438bcb | 98 | 3: .space NR_CPUS * 4 |