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authorSam Ravnborg <sam@ravnborg.org>2008-12-03 06:11:52 -0500
committerDavid S. Miller <davem@davemloft.net>2008-12-04 12:17:21 -0500
commita88b5ba8bd8ac18aad65ee6c6a254e2e74876db3 (patch)
treeeb3d0ffaf53c3f7ec6083752c2097cecd1cb892a /arch/sparc/kernel/sstate.c
parentd670bd4f803c8b646acd20f3ba21e65458293faf (diff)
sparc,sparc64: unify kernel/
o Move all files from sparc64/kernel/ to sparc/kernel - rename as appropriate o Update sparc/Makefile to the changes o Update sparc/kernel/Makefile to include the sparc64 files NOTE: This commit changes link order on sparc64! Link order had to change for either of sparc32 and sparc64. And assuming sparc64 see more testing than sparc32 change link order on sparc64 where issues will be caught faster. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/sstate.c')
-rw-r--r--arch/sparc/kernel/sstate.c127
1 files changed, 127 insertions, 0 deletions
diff --git a/arch/sparc/kernel/sstate.c b/arch/sparc/kernel/sstate.c
new file mode 100644
index 000000000000..8cdbe5946b43
--- /dev/null
+++ b/arch/sparc/kernel/sstate.c
@@ -0,0 +1,127 @@
1/* sstate.c: System soft state support.
2 *
3 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
4 */
5
6#include <linux/kernel.h>
7#include <linux/notifier.h>
8#include <linux/reboot.h>
9#include <linux/init.h>
10
11#include <asm/hypervisor.h>
12#include <asm/spitfire.h>
13#include <asm/oplib.h>
14#include <asm/head.h>
15#include <asm/io.h>
16
17static int hv_supports_soft_state;
18
19static unsigned long kimage_addr_to_ra(const char *p)
20{
21 unsigned long val = (unsigned long) p;
22
23 return kern_base + (val - KERNBASE);
24}
25
26static void do_set_sstate(unsigned long state, const char *msg)
27{
28 unsigned long err;
29
30 if (!hv_supports_soft_state)
31 return;
32
33 err = sun4v_mach_set_soft_state(state, kimage_addr_to_ra(msg));
34 if (err) {
35 printk(KERN_WARNING "SSTATE: Failed to set soft-state to "
36 "state[%lx] msg[%s], err=%lu\n",
37 state, msg, err);
38 }
39}
40
41static const char booting_msg[32] __attribute__((aligned(32))) =
42 "Linux booting";
43static const char running_msg[32] __attribute__((aligned(32))) =
44 "Linux running";
45static const char halting_msg[32] __attribute__((aligned(32))) =
46 "Linux halting";
47static const char poweroff_msg[32] __attribute__((aligned(32))) =
48 "Linux powering off";
49static const char rebooting_msg[32] __attribute__((aligned(32))) =
50 "Linux rebooting";
51static const char panicing_msg[32] __attribute__((aligned(32))) =
52 "Linux panicing";
53
54static int sstate_reboot_call(struct notifier_block *np, unsigned long type, void *_unused)
55{
56 const char *msg;
57
58 switch (type) {
59 case SYS_DOWN:
60 default:
61 msg = rebooting_msg;
62 break;
63
64 case SYS_HALT:
65 msg = halting_msg;
66 break;
67
68 case SYS_POWER_OFF:
69 msg = poweroff_msg;
70 break;
71 }
72
73 do_set_sstate(HV_SOFT_STATE_TRANSITION, msg);
74
75 return NOTIFY_OK;
76}
77
78static struct notifier_block sstate_reboot_notifier = {
79 .notifier_call = sstate_reboot_call,
80};
81
82static int sstate_panic_event(struct notifier_block *n, unsigned long event, void *ptr)
83{
84 do_set_sstate(HV_SOFT_STATE_TRANSITION, panicing_msg);
85
86 return NOTIFY_DONE;
87}
88
89static struct notifier_block sstate_panic_block = {
90 .notifier_call = sstate_panic_event,
91 .priority = INT_MAX,
92};
93
94static int __init sstate_init(void)
95{
96 unsigned long major, minor;
97
98 if (tlb_type != hypervisor)
99 return 0;
100
101 major = 1;
102 minor = 0;
103 if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor))
104 return 0;
105
106 hv_supports_soft_state = 1;
107
108 prom_sun4v_guest_soft_state();
109
110 do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg);
111
112 atomic_notifier_chain_register(&panic_notifier_list,
113 &sstate_panic_block);
114 register_reboot_notifier(&sstate_reboot_notifier);
115
116 return 0;
117}
118
119core_initcall(sstate_init);
120
121static int __init sstate_running(void)
122{
123 do_set_sstate(HV_SOFT_STATE_NORMAL, running_msg);
124 return 0;
125}
126
127late_initcall(sstate_running);