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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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bda0f5bad8
This change improves and cleans up the tile console. - We enable HVC_IRQ support on tilegx, with the addition of a new Tilera hypervisor API for tilegx to allow a console IPI. If IPI support is not available we fall back to the previous polling mode. - We simplify the earlyprintk code to use CON_BOOT and eliminate some of the other supporting earlyprintk code. - A new tile_console_write() primitive is used to send output to the console and is factored out of the hvc_tile driver. This lets us support a "sim_console" boot argument to allow using simulator hooks to send output to the "console" as a slightly faster alternative to emulating the hardware more directly. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#include <linux/stddef.h>
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#include <linux/reboot.h>
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#include <linux/smp.h>
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#include <linux/pm.h>
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#include <linux/export.h>
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#include <asm/page.h>
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#include <asm/setup.h>
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#include <hv/hypervisor.h>
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#ifndef CONFIG_SMP
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#define smp_send_stop()
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#endif
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void machine_halt(void)
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{
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arch_local_irq_disable_all();
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smp_send_stop();
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hv_halt();
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}
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void machine_power_off(void)
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{
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arch_local_irq_disable_all();
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smp_send_stop();
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hv_power_off();
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}
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void machine_restart(char *cmd)
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{
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arch_local_irq_disable_all();
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smp_send_stop();
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hv_restart((HV_VirtAddr) "vmlinux", (HV_VirtAddr) cmd);
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}
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/* No interesting distinction to be made here. */
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void (*pm_power_off)(void) = NULL;
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EXPORT_SYMBOL(pm_power_off);
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