From a88b5ba8bd8ac18aad65ee6c6a254e2e74876db3 Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Wed, 3 Dec 2008 03:11:52 -0800
Subject: 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>
---
 arch/sparc/kernel/sstate.c | 127 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 arch/sparc/kernel/sstate.c

(limited to 'arch/sparc/kernel/sstate.c')

diff --git a/arch/sparc/kernel/sstate.c b/arch/sparc/kernel/sstate.c
new file mode 100644
index 00000000000..8cdbe5946b4
--- /dev/null
+++ b/arch/sparc/kernel/sstate.c
@@ -0,0 +1,127 @@
+/* sstate.c: System soft state support.
+ *
+ * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
+ */
+
+#include <linux/kernel.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+
+#include <asm/hypervisor.h>
+#include <asm/spitfire.h>
+#include <asm/oplib.h>
+#include <asm/head.h>
+#include <asm/io.h>
+
+static int hv_supports_soft_state;
+
+static unsigned long kimage_addr_to_ra(const char *p)
+{
+	unsigned long val = (unsigned long) p;
+
+	return kern_base + (val - KERNBASE);
+}
+
+static void do_set_sstate(unsigned long state, const char *msg)
+{
+	unsigned long err;
+
+	if (!hv_supports_soft_state)
+		return;
+
+	err = sun4v_mach_set_soft_state(state, kimage_addr_to_ra(msg));
+	if (err) {
+		printk(KERN_WARNING "SSTATE: Failed to set soft-state to "
+		       "state[%lx] msg[%s], err=%lu\n",
+		       state, msg, err);
+	}
+}
+
+static const char booting_msg[32] __attribute__((aligned(32))) =
+	"Linux booting";
+static const char running_msg[32] __attribute__((aligned(32))) =
+	"Linux running";
+static const char halting_msg[32] __attribute__((aligned(32))) =
+	"Linux halting";
+static const char poweroff_msg[32] __attribute__((aligned(32))) =
+	"Linux powering off";
+static const char rebooting_msg[32] __attribute__((aligned(32))) =
+	"Linux rebooting";
+static const char panicing_msg[32] __attribute__((aligned(32))) =
+	"Linux panicing";
+
+static int sstate_reboot_call(struct notifier_block *np, unsigned long type, void *_unused)
+{
+	const char *msg;
+
+	switch (type) {
+	case SYS_DOWN:
+	default:
+		msg = rebooting_msg;
+		break;
+
+	case SYS_HALT:
+		msg = halting_msg;
+		break;
+
+	case SYS_POWER_OFF:
+		msg = poweroff_msg;
+		break;
+	}
+
+	do_set_sstate(HV_SOFT_STATE_TRANSITION, msg);
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block sstate_reboot_notifier = {
+	.notifier_call = sstate_reboot_call,
+};
+
+static int sstate_panic_event(struct notifier_block *n, unsigned long event, void *ptr)
+{
+	do_set_sstate(HV_SOFT_STATE_TRANSITION, panicing_msg);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block sstate_panic_block = {
+	.notifier_call	=	sstate_panic_event,
+	.priority	=	INT_MAX,
+};
+
+static int __init sstate_init(void)
+{
+	unsigned long major, minor;
+
+	if (tlb_type != hypervisor)
+		return 0;
+
+	major = 1;
+	minor = 0;
+	if (sun4v_hvapi_register(HV_GRP_SOFT_STATE, major, &minor))
+		return 0;
+
+	hv_supports_soft_state = 1;
+
+	prom_sun4v_guest_soft_state();
+
+	do_set_sstate(HV_SOFT_STATE_TRANSITION, booting_msg);
+
+	atomic_notifier_chain_register(&panic_notifier_list,
+				       &sstate_panic_block);
+	register_reboot_notifier(&sstate_reboot_notifier);
+
+	return 0;
+}
+
+core_initcall(sstate_init);
+
+static int __init sstate_running(void)
+{
+	do_set_sstate(HV_SOFT_STATE_NORMAL, running_msg);
+	return 0;
+}
+
+late_initcall(sstate_running);
-- 
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