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authorTony Breeds <tony@bakeyournoodle.com>2008-04-23 23:43:49 -0400
committerPaul Mackerras <paulus@samba.org>2008-04-24 06:58:04 -0400
commit90035fe378c7459ba19c43c63d5f878284224ce4 (patch)
treee6daaaf5d9b0e2d077105e9263399f5f09f2c633 /arch/powerpc/kernel
parent9cb82f2f4692293a27c578c3038518ce4477de72 (diff)
[POWERPC] Raise the upper limit of NR_CPUS and move the pacas into the BSS
This adds the required functionality to fill in all pacas at runtime. With NR_CPUS=1024 text data bss dec hex filename 137 1704032 0 1704169 1a00e9 arch/powerpc/kernel/paca.o :Before 121 1179744 524288 1704153 1a00d9 arch/powerpc/kernel/paca.o :After Also remove unneeded #includes from arch/powerpc/kernel/paca.c Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/paca.c87
-rw-r--r--arch/powerpc/kernel/setup_64.c3
2 files changed, 28 insertions, 62 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index ac163bd46cfd..c9bf17eec31b 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -7,17 +7,11 @@
7 * 2 of the License, or (at your option) any later version. 7 * 2 of the License, or (at your option) any later version.
8 */ 8 */
9 9
10#include <linux/types.h>
11#include <linux/threads.h> 10#include <linux/threads.h>
12#include <linux/module.h> 11#include <linux/module.h>
13 12
14#include <asm/processor.h>
15#include <asm/ptrace.h>
16#include <asm/page.h>
17#include <asm/lppaca.h> 13#include <asm/lppaca.h>
18#include <asm/paca.h> 14#include <asm/paca.h>
19#include <asm/mmu.h>
20
21 15
22/* This symbol is provided by the linker - let it fill in the paca 16/* This symbol is provided by the linker - let it fill in the paca
23 * field correctly */ 17 * field correctly */
@@ -65,60 +59,29 @@ struct slb_shadow slb_shadow[] __cacheline_aligned = {
65 * processors. The processor VPD array needs one entry per physical 59 * processors. The processor VPD array needs one entry per physical
66 * processor (not thread). 60 * processor (not thread).
67 */ 61 */
68#define PACA_INIT(number) \ 62struct paca_struct paca[NR_CPUS];
69{ \
70 .lppaca_ptr = &lppaca[number], \
71 .lock_token = 0x8000, \
72 .paca_index = (number), /* Paca Index */ \
73 .kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL, \
74 .hw_cpu_id = 0xffff, \
75 .slb_shadow_ptr = &slb_shadow[number], \
76 .__current = &init_task, \
77}
78
79struct paca_struct paca[] = {
80 PACA_INIT(0),
81#if NR_CPUS > 1
82 PACA_INIT( 1), PACA_INIT( 2), PACA_INIT( 3),
83#if NR_CPUS > 4
84 PACA_INIT( 4), PACA_INIT( 5), PACA_INIT( 6), PACA_INIT( 7),
85#if NR_CPUS > 8
86 PACA_INIT( 8), PACA_INIT( 9), PACA_INIT( 10), PACA_INIT( 11),
87 PACA_INIT( 12), PACA_INIT( 13), PACA_INIT( 14), PACA_INIT( 15),
88 PACA_INIT( 16), PACA_INIT( 17), PACA_INIT( 18), PACA_INIT( 19),
89 PACA_INIT( 20), PACA_INIT( 21), PACA_INIT( 22), PACA_INIT( 23),
90 PACA_INIT( 24), PACA_INIT( 25), PACA_INIT( 26), PACA_INIT( 27),
91 PACA_INIT( 28), PACA_INIT( 29), PACA_INIT( 30), PACA_INIT( 31),
92#if NR_CPUS > 32
93 PACA_INIT( 32), PACA_INIT( 33), PACA_INIT( 34), PACA_INIT( 35),
94 PACA_INIT( 36), PACA_INIT( 37), PACA_INIT( 38), PACA_INIT( 39),
95 PACA_INIT( 40), PACA_INIT( 41), PACA_INIT( 42), PACA_INIT( 43),
96 PACA_INIT( 44), PACA_INIT( 45), PACA_INIT( 46), PACA_INIT( 47),
97 PACA_INIT( 48), PACA_INIT( 49), PACA_INIT( 50), PACA_INIT( 51),
98 PACA_INIT( 52), PACA_INIT( 53), PACA_INIT( 54), PACA_INIT( 55),
99 PACA_INIT( 56), PACA_INIT( 57), PACA_INIT( 58), PACA_INIT( 59),
100 PACA_INIT( 60), PACA_INIT( 61), PACA_INIT( 62), PACA_INIT( 63),
101#if NR_CPUS > 64
102 PACA_INIT( 64), PACA_INIT( 65), PACA_INIT( 66), PACA_INIT( 67),
103 PACA_INIT( 68), PACA_INIT( 69), PACA_INIT( 70), PACA_INIT( 71),
104 PACA_INIT( 72), PACA_INIT( 73), PACA_INIT( 74), PACA_INIT( 75),
105 PACA_INIT( 76), PACA_INIT( 77), PACA_INIT( 78), PACA_INIT( 79),
106 PACA_INIT( 80), PACA_INIT( 81), PACA_INIT( 82), PACA_INIT( 83),
107 PACA_INIT( 84), PACA_INIT( 85), PACA_INIT( 86), PACA_INIT( 87),
108 PACA_INIT( 88), PACA_INIT( 89), PACA_INIT( 90), PACA_INIT( 91),
109 PACA_INIT( 92), PACA_INIT( 93), PACA_INIT( 94), PACA_INIT( 95),
110 PACA_INIT( 96), PACA_INIT( 97), PACA_INIT( 98), PACA_INIT( 99),
111 PACA_INIT(100), PACA_INIT(101), PACA_INIT(102), PACA_INIT(103),
112 PACA_INIT(104), PACA_INIT(105), PACA_INIT(106), PACA_INIT(107),
113 PACA_INIT(108), PACA_INIT(109), PACA_INIT(110), PACA_INIT(111),
114 PACA_INIT(112), PACA_INIT(113), PACA_INIT(114), PACA_INIT(115),
115 PACA_INIT(116), PACA_INIT(117), PACA_INIT(118), PACA_INIT(119),
116 PACA_INIT(120), PACA_INIT(121), PACA_INIT(122), PACA_INIT(123),
117 PACA_INIT(124), PACA_INIT(125), PACA_INIT(126), PACA_INIT(127),
118#endif
119#endif
120#endif
121#endif
122#endif
123};
124EXPORT_SYMBOL(paca); 63EXPORT_SYMBOL(paca);
64
65void __init initialise_pacas(void)
66{
67 int cpu;
68
69 /* The TOC register (GPR2) points 32kB into the TOC, so that 64kB
70 * of the TOC can be addressed using a single machine instruction.
71 */
72 unsigned long kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL;
73
74 /* Can't use for_each_*_cpu, as they aren't functional yet */
75 for (cpu = 0; cpu < NR_CPUS; cpu++) {
76 struct paca_struct *new_paca = &paca[cpu];
77
78 new_paca->lppaca_ptr = &lppaca[cpu];
79 new_paca->lock_token = 0x8000;
80 new_paca->paca_index = cpu;
81 new_paca->kernel_toc = kernel_toc;
82 new_paca->hw_cpu_id = 0xffff;
83 new_paca->slb_shadow_ptr = &slb_shadow[cpu];
84 new_paca->__current = &init_task;
85
86 }
87}
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 153a48dc8f40..dff6308d1b5e 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -170,6 +170,9 @@ void __init setup_paca(int cpu)
170 170
171void __init early_setup(unsigned long dt_ptr) 171void __init early_setup(unsigned long dt_ptr)
172{ 172{
173 /* Fill in any unititialised pacas */
174 initialise_pacas();
175
173 /* Identify CPU type */ 176 /* Identify CPU type */
174 identify_cpu(0, mfspr(SPRN_PVR)); 177 identify_cpu(0, mfspr(SPRN_PVR));
175 178