From 69f3a7de1f1ec935924b1b13f83812f8b30e92ce Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 24 Nov 2009 01:24:58 +0000 Subject: MIPS: Modularize COP2 handling Away with the daemons of ifdef; get ready for future COP2 users. Signed-off-by: Ralf Baechle Patchwork: http://patchwork.linux-mips.org/patch/708/ --- arch/mips/cavium-octeon/cpu.c | 52 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 arch/mips/cavium-octeon/cpu.c (limited to 'arch/mips/cavium-octeon/cpu.c') diff --git a/arch/mips/cavium-octeon/cpu.c b/arch/mips/cavium-octeon/cpu.c new file mode 100644 index 0000000..b6df538 --- /dev/null +++ b/arch/mips/cavium-octeon/cpu.c @@ -0,0 +1,52 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2009 Wind River Systems, + * written by Ralf Baechle + */ +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +static int cnmips_cu2_call(struct notifier_block *nfb, unsigned long action, + void *data) +{ + unsigned long flags; + unsigned int status; + + switch (action) { + case CU2_EXCEPTION: + prefetch(¤t->thread.cp2); + local_irq_save(flags); + KSTK_STATUS(current) |= ST0_CU2; + status = read_c0_status(); + write_c0_status(status | ST0_CU2); + octeon_cop2_restore(&(current->thread.cp2)); + write_c0_status(status & ~ST0_CU2); + local_irq_restore(flags); + + return NOTIFY_BAD; /* Don't call default notifier */ + } + + return NOTIFY_OK; /* Let default notifier send signals */ +} + +static struct notifier_block cnmips_cu2_notifier = { + .notifier_call = cnmips_cu2_call, +}; + +static int cnmips_cu2_setup(void) +{ + return register_cu2_notifier(&cnmips_cu2_notifier); +} +early_initcall(cnmips_cu2_setup); -- cgit v1.1