diff options
author | merge <null@invalid> | 2009-01-22 13:55:32 +0000 |
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committer | Andy Green <agreen@octopus.localdomain> | 2009-01-22 13:55:32 +0000 |
commit | aa6f5ffbdba45aa8e19e5048648fc6c7b25376d3 (patch) | |
tree | fbb786d0ac6f8a774fd834e9ce951197e60fbffa /arch/sparc/kernel/sstate.c | |
parent | f2d78193eae5dccd3d588d2c8ea0866efc368332 (diff) |
MERGE-via-pending-tracking-hist-MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141
pending-tracking-hist top was MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141 / fdf777a63bcb59e0dfd78bfe2c6242e01f6d4eb9 ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-stable-tracking-hist-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040
stable-tracking-hist top was MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040 / 90463bfd2d5a3c8b52f6e6d71024a00e052b0ced ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-mokopatches-tracking-hist-fix-stray-endmenu-patch
mokopatches-tracking-hist top was fix-stray-endmenu-patch / 3630e0be570de8057e7f8d2fe501ed353cdf34e6 ... parent commitmessage:
From: Andy Green <andy@openmoko.com>
fix-stray-endmenu.patch
Signed-off-by: Andy Green <andy@openmoko.com>
Diffstat (limited to 'arch/sparc/kernel/sstate.c')
-rw-r--r-- | arch/sparc/kernel/sstate.c | 127 |
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 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); |