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-rw-r--r--arch/powerpc/kernel/paca.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
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1/*
2 * c 2001 PPC 64 Team, IBM Corp
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9
10#include <linux/config.h>
11#include <linux/types.h>
12#include <linux/threads.h>
13#include <linux/module.h>
14
15#include <asm/processor.h>
16#include <asm/ptrace.h>
17#include <asm/page.h>
18
19#include <asm/lppaca.h>
20#include <asm/iseries/it_lp_queue.h>
21#include <asm/paca.h>
22
23static union {
24 struct systemcfg data;
25 u8 page[PAGE_SIZE];
26} systemcfg_store __attribute__((__section__(".data.page.aligned")));
27struct systemcfg *systemcfg = &systemcfg_store.data;
28EXPORT_SYMBOL(systemcfg);
29
30
31/* This symbol is provided by the linker - let it fill in the paca
32 * field correctly */
33extern unsigned long __toc_start;
34
35/* The Paca is an array with one entry per processor. Each contains an
36 * lppaca, which contains the information shared between the
37 * hypervisor and Linux. Each also contains an ItLpRegSave area which
38 * is used by the hypervisor to save registers.
39 * On systems with hardware multi-threading, there are two threads
40 * per processor. The Paca array must contain an entry for each thread.
41 * The VPD Areas will give a max logical processors = 2 * max physical
42 * processors. The processor VPD array needs one entry per physical
43 * processor (not thread).
44 */
45#define PACA_INIT_COMMON(number, start, asrr, asrv) \
46 .lock_token = 0x8000, \
47 .paca_index = (number), /* Paca Index */ \
48 .default_decr = 0x00ff0000, /* Initial Decr */ \
49 .kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL, \
50 .stab_real = (asrr), /* Real pointer to segment table */ \
51 .stab_addr = (asrv), /* Virt pointer to segment table */ \
52 .cpu_start = (start), /* Processor start */ \
53 .hw_cpu_id = 0xffff, \
54 .lppaca = { \
55 .desc = 0xd397d781, /* "LpPa" */ \
56 .size = sizeof(struct lppaca), \
57 .dyn_proc_status = 2, \
58 .decr_val = 0x00ff0000, \
59 .fpregs_in_use = 1, \
60 .end_of_quantum = 0xfffffffffffffffful, \
61 .slb_count = 64, \
62 .vmxregs_in_use = 0, \
63 }, \
64
65#ifdef CONFIG_PPC_ISERIES
66#define PACA_INIT_ISERIES(number) \
67 .lppaca_ptr = &paca[number].lppaca, \
68 .reg_save_ptr = &paca[number].reg_save, \
69 .reg_save = { \
70 .xDesc = 0xd397d9e2, /* "LpRS" */ \
71 .xSize = sizeof(struct ItLpRegSave) \
72 }
73
74#define PACA_INIT(number) \
75{ \
76 PACA_INIT_COMMON(number, 0, 0, 0) \
77 PACA_INIT_ISERIES(number) \
78}
79
80#define BOOTCPU_PACA_INIT(number) \
81{ \
82 PACA_INIT_COMMON(number, 1, 0, (u64)&initial_stab) \
83 PACA_INIT_ISERIES(number) \
84}
85
86#else
87#define PACA_INIT(number) \
88{ \
89 PACA_INIT_COMMON(number, 0, 0, 0) \
90}
91
92#define BOOTCPU_PACA_INIT(number) \
93{ \
94 PACA_INIT_COMMON(number, 1, STAB0_PHYS_ADDR, (u64)&initial_stab) \
95}
96#endif
97
98struct paca_struct paca[] = {
99 BOOTCPU_PACA_INIT(0),
100#if NR_CPUS > 1
101 PACA_INIT( 1), PACA_INIT( 2), PACA_INIT( 3),
102#if NR_CPUS > 4
103 PACA_INIT( 4), PACA_INIT( 5), PACA_INIT( 6), PACA_INIT( 7),
104#if NR_CPUS > 8
105 PACA_INIT( 8), PACA_INIT( 9), PACA_INIT( 10), PACA_INIT( 11),
106 PACA_INIT( 12), PACA_INIT( 13), PACA_INIT( 14), PACA_INIT( 15),
107 PACA_INIT( 16), PACA_INIT( 17), PACA_INIT( 18), PACA_INIT( 19),
108 PACA_INIT( 20), PACA_INIT( 21), PACA_INIT( 22), PACA_INIT( 23),
109 PACA_INIT( 24), PACA_INIT( 25), PACA_INIT( 26), PACA_INIT( 27),
110 PACA_INIT( 28), PACA_INIT( 29), PACA_INIT( 30), PACA_INIT( 31),
111#if NR_CPUS > 32
112 PACA_INIT( 32), PACA_INIT( 33), PACA_INIT( 34), PACA_INIT( 35),
113 PACA_INIT( 36), PACA_INIT( 37), PACA_INIT( 38), PACA_INIT( 39),
114 PACA_INIT( 40), PACA_INIT( 41), PACA_INIT( 42), PACA_INIT( 43),
115 PACA_INIT( 44), PACA_INIT( 45), PACA_INIT( 46), PACA_INIT( 47),
116 PACA_INIT( 48), PACA_INIT( 49), PACA_INIT( 50), PACA_INIT( 51),
117 PACA_INIT( 52), PACA_INIT( 53), PACA_INIT( 54), PACA_INIT( 55),
118 PACA_INIT( 56), PACA_INIT( 57), PACA_INIT( 58), PACA_INIT( 59),
119 PACA_INIT( 60), PACA_INIT( 61), PACA_INIT( 62), PACA_INIT( 63),
120#if NR_CPUS > 64
121 PACA_INIT( 64), PACA_INIT( 65), PACA_INIT( 66), PACA_INIT( 67),
122 PACA_INIT( 68), PACA_INIT( 69), PACA_INIT( 70), PACA_INIT( 71),
123 PACA_INIT( 72), PACA_INIT( 73), PACA_INIT( 74), PACA_INIT( 75),
124 PACA_INIT( 76), PACA_INIT( 77), PACA_INIT( 78), PACA_INIT( 79),
125 PACA_INIT( 80), PACA_INIT( 81), PACA_INIT( 82), PACA_INIT( 83),
126 PACA_INIT( 84), PACA_INIT( 85), PACA_INIT( 86), PACA_INIT( 87),
127 PACA_INIT( 88), PACA_INIT( 89), PACA_INIT( 90), PACA_INIT( 91),
128 PACA_INIT( 92), PACA_INIT( 93), PACA_INIT( 94), PACA_INIT( 95),
129 PACA_INIT( 96), PACA_INIT( 97), PACA_INIT( 98), PACA_INIT( 99),
130 PACA_INIT(100), PACA_INIT(101), PACA_INIT(102), PACA_INIT(103),
131 PACA_INIT(104), PACA_INIT(105), PACA_INIT(106), PACA_INIT(107),
132 PACA_INIT(108), PACA_INIT(109), PACA_INIT(110), PACA_INIT(111),
133 PACA_INIT(112), PACA_INIT(113), PACA_INIT(114), PACA_INIT(115),
134 PACA_INIT(116), PACA_INIT(117), PACA_INIT(118), PACA_INIT(119),
135 PACA_INIT(120), PACA_INIT(121), PACA_INIT(122), PACA_INIT(123),
136 PACA_INIT(124), PACA_INIT(125), PACA_INIT(126), PACA_INIT(127),
137#endif
138#endif
139#endif
140#endif
141#endif
142};
143EXPORT_SYMBOL(paca);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 14:30:57 -0500