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e879c862fb
We only need to set the system up for a soft-restart if we're going to be doing a soft-restart. Provide a new function (soft_restart()) which does the setup and final call for this, and make platforms use it. Eliminate the call to setup_restart() from the default handler. This means that platforms arch_reset() function is no longer called with the page tables prepared for a soft-restart, and caches will still be enabled. Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Krzysztof Ha■asa <khc@pm.waw.pl> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Richard Purdie <richard.purdie@linuxfoundation.org> Acked-by: Wan ZongShun <mcuos.com@gmail.com> Acked-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/*
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* arch/arm/mach-footbridge/include/mach/system.h
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*
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* Copyright (C) 1996-1999 Russell King.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/io.h>
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#include <asm/hardware/dec21285.h>
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#include <mach/hardware.h>
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#include <asm/leds.h>
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#include <asm/mach-types.h>
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static inline void arch_idle(void)
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{
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cpu_do_idle();
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}
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static inline void arch_reset(char mode, const char *cmd)
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{
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if (mode == 's') {
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/*
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* Jump into the ROM
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*/
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soft_restart(0x41000000);
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} else {
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if (machine_is_netwinder()) {
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/* open up the SuperIO chip
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*/
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outb(0x87, 0x370);
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outb(0x87, 0x370);
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/* aux function group 1 (logical device 7)
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*/
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outb(0x07, 0x370);
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outb(0x07, 0x371);
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/* set GP16 for WD-TIMER output
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*/
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outb(0xe6, 0x370);
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outb(0x00, 0x371);
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/* set a RED LED and toggle WD_TIMER for rebooting
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*/
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outb(0xc4, 0x338);
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} else {
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/*
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* Force the watchdog to do a CPU reset.
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*
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* After making sure that the watchdog is disabled
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* (so we can change the timer registers) we first
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* enable the timer to autoreload itself. Next, the
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* timer interval is set really short and any
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* current interrupt request is cleared (so we can
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* see an edge transition). Finally, TIMER4 is
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* enabled as the watchdog.
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*/
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*CSR_SA110_CNTL &= ~(1 << 13);
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*CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE |
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TIMER_CNTL_AUTORELOAD |
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TIMER_CNTL_DIV16;
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*CSR_TIMER4_LOAD = 0x2;
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*CSR_TIMER4_CLR = 0;
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*CSR_SA110_CNTL |= (1 << 13);
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}
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}
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}
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