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>
52 lines
1.6 KiB
C
52 lines
1.6 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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#ifndef _ASM_TILE_SETUP_H
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#define _ASM_TILE_SETUP_H
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#include <linux/pfn.h>
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#include <linux/init.h>
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#include <uapi/asm/setup.h>
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/*
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* Reserved space for vmalloc and iomap - defined in asm/page.h
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*/
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#define MAXMEM_PFN PFN_DOWN(MAXMEM)
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int tile_console_write(const char *buf, int count);
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void early_panic(const char *fmt, ...);
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/* Init-time routine to do tile-specific per-cpu setup. */
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void setup_cpu(int boot);
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/* User-level DMA management functions */
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void grant_dma_mpls(void);
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void restrict_dma_mpls(void);
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#ifdef CONFIG_HARDWALL
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/* User-level network management functions */
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void reset_network_state(void);
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struct task_struct;
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void hardwall_switch_tasks(struct task_struct *prev, struct task_struct *next);
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void hardwall_deactivate_all(struct task_struct *task);
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int hardwall_ipi_valid(int cpu);
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/* Hook hardwall code into changes in affinity. */
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#define arch_set_cpus_allowed(p, new_mask) do { \
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if (!cpumask_equal(&p->cpus_allowed, new_mask)) \
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hardwall_deactivate_all(p); \
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} while (0)
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#endif
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#endif /* _ASM_TILE_SETUP_H */
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