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-rw-r--r--arch/sparc/Kconfig7
-rw-r--r--arch/sparc/Makefile1
-rw-r--r--arch/sparc/include/asm/hibernate.h23
-rw-r--r--arch/sparc/kernel/asm-offsets.c15
-rw-r--r--arch/sparc/power/Makefile3
-rw-r--r--arch/sparc/power/hibernate.c42
-rw-r--r--arch/sparc/power/hibernate_asm.S131
7 files changed, 222 insertions, 0 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index c3c3ad25612b..33e48cbf25ab 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -100,6 +100,9 @@ config HAVE_LATENCYTOP_SUPPORT
100 bool 100 bool
101 default y if SPARC64 101 default y if SPARC64
102 102
103config ARCH_HIBERNATION_POSSIBLE
104 def_bool y if SPARC64
105
103config AUDIT_ARCH 106config AUDIT_ARCH
104 bool 107 bool
105 default y 108 default y
@@ -327,6 +330,10 @@ config ARCH_SPARSEMEM_DEFAULT
327 330
328source "mm/Kconfig" 331source "mm/Kconfig"
329 332
333if SPARC64
334source "kernel/power/Kconfig"
335endif
336
330config SCHED_SMT 337config SCHED_SMT
331 bool "SMT (Hyperthreading) scheduler support" 338 bool "SMT (Hyperthreading) scheduler support"
332 depends on SPARC64 && SMP 339 depends on SPARC64 && SMP
diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
index 541b8b075c7d..9ff423678cbc 100644
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -57,6 +57,7 @@ core-y += arch/sparc/
57libs-y += arch/sparc/prom/ 57libs-y += arch/sparc/prom/
58libs-y += arch/sparc/lib/ 58libs-y += arch/sparc/lib/
59 59
60drivers-$(CONFIG_PM) += arch/sparc/power/
60drivers-$(CONFIG_OPROFILE) += arch/sparc/oprofile/ 61drivers-$(CONFIG_OPROFILE) += arch/sparc/oprofile/
61 62
62boot := arch/sparc/boot 63boot := arch/sparc/boot
diff --git a/arch/sparc/include/asm/hibernate.h b/arch/sparc/include/asm/hibernate.h
new file mode 100644
index 000000000000..2ec34f842249
--- /dev/null
+++ b/arch/sparc/include/asm/hibernate.h
@@ -0,0 +1,23 @@
1/*
2 * hibernate.h: Hibernaton support specific for sparc64.
3 *
4 * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
5 */
6
7#ifndef ___SPARC_HIBERNATE_H
8#define ___SPARC_HIBERNATE_H
9
10struct saved_context {
11 unsigned long fp;
12 unsigned long cwp;
13 unsigned long wstate;
14
15 unsigned long tick;
16 unsigned long pstate;
17
18 unsigned long g4;
19 unsigned long g5;
20 unsigned long g6;
21};
22
23#endif
diff --git a/arch/sparc/kernel/asm-offsets.c b/arch/sparc/kernel/asm-offsets.c
index 68f7e1118e9b..961b87f99e69 100644
--- a/arch/sparc/kernel/asm-offsets.c
+++ b/arch/sparc/kernel/asm-offsets.c
@@ -14,6 +14,8 @@
14// #include <linux/mm.h> 14// #include <linux/mm.h>
15#include <linux/kbuild.h> 15#include <linux/kbuild.h>
16 16
17#include <asm/hibernate.h>
18
17#ifdef CONFIG_SPARC32 19#ifdef CONFIG_SPARC32
18int sparc32_foo(void) 20int sparc32_foo(void)
19{ 21{
@@ -24,6 +26,19 @@ int sparc32_foo(void)
24#else 26#else
25int sparc64_foo(void) 27int sparc64_foo(void)
26{ 28{
29#ifdef CONFIG_HIBERNATION
30 BLANK();
31 OFFSET(SC_REG_FP, saved_context, fp);
32 OFFSET(SC_REG_CWP, saved_context, cwp);
33 OFFSET(SC_REG_WSTATE, saved_context, wstate);
34
35 OFFSET(SC_REG_TICK, saved_context, tick);
36 OFFSET(SC_REG_PSTATE, saved_context, pstate);
37
38 OFFSET(SC_REG_G4, saved_context, g4);
39 OFFSET(SC_REG_G5, saved_context, g5);
40 OFFSET(SC_REG_G6, saved_context, g6);
41#endif
27 return 0; 42 return 0;
28} 43}
29#endif 44#endif
diff --git a/arch/sparc/power/Makefile b/arch/sparc/power/Makefile
new file mode 100644
index 000000000000..3201ace0ddbd
--- /dev/null
+++ b/arch/sparc/power/Makefile
@@ -0,0 +1,3 @@
1# Makefile for Sparc-specific hibernate files.
2
3obj-$(CONFIG_HIBERNATION) += hibernate.o hibernate_asm.o
diff --git a/arch/sparc/power/hibernate.c b/arch/sparc/power/hibernate.c
new file mode 100644
index 000000000000..42b0b8ce699a
--- /dev/null
+++ b/arch/sparc/power/hibernate.c
@@ -0,0 +1,42 @@
1/*
2 * hibernate.c: Hibernaton support specific for sparc64.
3 *
4 * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
5 */
6
7#include <linux/mm.h>
8
9#include <asm/hibernate.h>
10#include <asm/visasm.h>
11#include <asm/page.h>
12#include <asm/tlb.h>
13
14/* References to section boundaries */
15extern const void __nosave_begin, __nosave_end;
16
17struct saved_context saved_context;
18
19/*
20 * pfn_is_nosave - check if given pfn is in the 'nosave' section
21 */
22
23int pfn_is_nosave(unsigned long pfn)
24{
25 unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin);
26 unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end);
27
28 return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
29}
30
31void save_processor_state(void)
32{
33 save_and_clear_fpu();
34}
35
36void restore_processor_state(void)
37{
38 struct mm_struct *mm = current->active_mm;
39
40 load_secondary_context(mm);
41 tsb_context_switch(mm);
42}
diff --git a/arch/sparc/power/hibernate_asm.S b/arch/sparc/power/hibernate_asm.S
new file mode 100644
index 000000000000..79942166df84
--- /dev/null
+++ b/arch/sparc/power/hibernate_asm.S
@@ -0,0 +1,131 @@
1/*
2 * hibernate_asm.S: Hibernaton support specific for sparc64.
3 *
4 * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
5 */
6
7#include <linux/linkage.h>
8
9#include <asm/asm-offsets.h>
10#include <asm/cpudata.h>
11#include <asm/page.h>
12
13ENTRY(swsusp_arch_suspend)
14 save %sp, -128, %sp
15 save %sp, -128, %sp
16 flushw
17
18 setuw saved_context, %g3
19
20 /* Save window regs */
21 rdpr %cwp, %g2
22 stx %g2, [%g3 + SC_REG_CWP]
23 rdpr %wstate, %g2
24 stx %g2, [%g3 + SC_REG_WSTATE]
25 stx %fp, [%g3 + SC_REG_FP]
26
27 /* Save state regs */
28 rdpr %tick, %g2
29 stx %g2, [%g3 + SC_REG_TICK]
30 rdpr %pstate, %g2
31 stx %g2, [%g3 + SC_REG_PSTATE]
32
33 /* Save global regs */
34 stx %g4, [%g3 + SC_REG_G4]
35 stx %g5, [%g3 + SC_REG_G5]
36 stx %g6, [%g3 + SC_REG_G6]
37
38 call swsusp_save
39 nop
40
41 mov %o0, %i0
42 restore
43
44 mov %o0, %i0
45 ret
46 restore
47
48ENTRY(swsusp_arch_resume)
49 /* Write restore_pblist to %l0 */
50 sethi %hi(restore_pblist), %l0
51 ldx [%l0 + %lo(restore_pblist)], %l0
52
53 call __flush_tlb_all
54 nop
55
56 /* Write PAGE_OFFSET to %g7 */
57 sethi %uhi(PAGE_OFFSET), %g7
58 sllx %g7, 32, %g7
59
60 setuw (PAGE_SIZE-8), %g3
61
62 /* Use MMU Bypass */
63 rd %asi, %g1
64 wr %g0, ASI_PHYS_USE_EC, %asi
65
66 ba fill_itlb
67 nop
68
69pbe_loop:
70 cmp %l0, %g0
71 be restore_ctx
72 sub %l0, %g7, %l0
73
74 ldxa [%l0 ] %asi, %l1 /* address */
75 ldxa [%l0 + 8] %asi, %l2 /* orig_address */
76
77 /* phys addr */
78 sub %l1, %g7, %l1
79 sub %l2, %g7, %l2
80
81 mov %g3, %l3 /* PAGE_SIZE-8 */
82copy_loop:
83 ldxa [%l1 + %l3] ASI_PHYS_USE_EC, %g2
84 stxa %g2, [%l2 + %l3] ASI_PHYS_USE_EC
85 cmp %l3, %g0
86 bne copy_loop
87 sub %l3, 8, %l3
88
89 /* next pbe */
90 ba pbe_loop
91 ldxa [%l0 + 16] %asi, %l0
92
93restore_ctx:
94 setuw saved_context, %g3
95
96 /* Restore window regs */
97 wrpr %g0, 0, %canrestore
98 wrpr %g0, 0, %otherwin
99 wrpr %g0, 6, %cansave
100 wrpr %g0, 0, %cleanwin
101
102 ldxa [%g3 + SC_REG_CWP] %asi, %g2
103 wrpr %g2, %cwp
104 ldxa [%g3 + SC_REG_WSTATE] %asi, %g2
105 wrpr %g2, %wstate
106 ldxa [%g3 + SC_REG_FP] %asi, %fp
107
108 /* Restore state regs */
109 ldxa [%g3 + SC_REG_PSTATE] %asi, %g2
110 wrpr %g2, %pstate
111 ldxa [%g3 + SC_REG_TICK] %asi, %g2
112 wrpr %g2, %tick
113
114 /* Restore global regs */
115 ldxa [%g3 + SC_REG_G4] %asi, %g4
116 ldxa [%g3 + SC_REG_G5] %asi, %g5
117 ldxa [%g3 + SC_REG_G6] %asi, %g6
118
119 wr %g1, %g0, %asi
120
121 restore
122 restore
123
124 wrpr %g0, 14, %pil
125
126 retl
127 mov %g0, %o0
128
129fill_itlb:
130 ba pbe_loop
131 wrpr %g0, 15, %pil
generated by cgit v1.2.2 (git 2.25.0) at 2025-07-16 08:20:01 -0400