4c076fb41a
The OCTEON is a MIPS64 based SOC family with an on chip watchdog unit. The driver is split into two source files one for the C code and one for assembly. Assembly is needed to handle the NMI and then print the machine state before the reboot is triggered. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Cc: Wim Van Sebroeck <wim@iguana.be> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Tony Lindgren <tony@atomide.com> Cc: Marc Zyngier <maz@misterjones.org> Cc: Thierry Reding <thierry.reding@avionic-design.de> Cc: Sam Ravnborg <sam@ravnborg.org> To: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org, Patchwork: https://patchwork.linux-mips.org/patch/1503/ Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> create mode 100644 drivers/watchdog/octeon-wdt-main.c create mode 100644 drivers/watchdog/octeon-wdt-nmi.S
65 lines
1.3 KiB
ArmAsm
65 lines
1.3 KiB
ArmAsm
/*
|
|
* 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) 2007 Cavium Networks
|
|
*/
|
|
#include <asm/asm.h>
|
|
#include <asm/regdef.h>
|
|
|
|
#define SAVE_REG(r) sd $r, -32768+6912-(32-r)*8($0)
|
|
|
|
NESTED(octeon_wdt_nmi_stage2, 0, sp)
|
|
.set push
|
|
.set noreorder
|
|
.set noat
|
|
/* Save all registers to the top CVMSEG. This shouldn't
|
|
* corrupt any state used by the kernel. Also all registers
|
|
* should have the value right before the NMI. */
|
|
SAVE_REG(0)
|
|
SAVE_REG(1)
|
|
SAVE_REG(2)
|
|
SAVE_REG(3)
|
|
SAVE_REG(4)
|
|
SAVE_REG(5)
|
|
SAVE_REG(6)
|
|
SAVE_REG(7)
|
|
SAVE_REG(8)
|
|
SAVE_REG(9)
|
|
SAVE_REG(10)
|
|
SAVE_REG(11)
|
|
SAVE_REG(12)
|
|
SAVE_REG(13)
|
|
SAVE_REG(14)
|
|
SAVE_REG(15)
|
|
SAVE_REG(16)
|
|
SAVE_REG(17)
|
|
SAVE_REG(18)
|
|
SAVE_REG(19)
|
|
SAVE_REG(20)
|
|
SAVE_REG(21)
|
|
SAVE_REG(22)
|
|
SAVE_REG(23)
|
|
SAVE_REG(24)
|
|
SAVE_REG(25)
|
|
SAVE_REG(26)
|
|
SAVE_REG(27)
|
|
SAVE_REG(28)
|
|
SAVE_REG(29)
|
|
SAVE_REG(30)
|
|
SAVE_REG(31)
|
|
/* Set the stack to begin right below the registers */
|
|
li sp, -32768+6912-32*8
|
|
/* Load the address of the third stage handler */
|
|
dla a0, octeon_wdt_nmi_stage3
|
|
/* Call the third stage handler */
|
|
jal a0
|
|
/* a0 is the address of the saved registers */
|
|
move a0, sp
|
|
/* Loop forvever if we get here. */
|
|
1: b 1b
|
|
nop
|
|
.set pop
|
|
END(octeon_wdt_nmi_stage2)
|