forked from Minki/linux
97dcb82de6
The irq_base for {mips,rm7k,rm9k}_cpu_irq_init() are constant on all
platforms and are same value on most platforms (0 or 16, depends on
CONFIG_I8259). Define them in asm-mips/mach-generic/irq.h and make
them customizable. This will save a few cycle on each CPU interrupt.
A good side effect is removing some dependencies to MALTA in generic
SMTC code.
Although MIPS_CPU_IRQ_BASE is customizable, this patch changes irq
mappings on DDB5477, EMMA2RH and MIPS_SIM, since really customizing
them might cause some header dependency problem and there seems no
good reason to customize it. So currently only VR41XX is using custom
MIPS_CPU_IRQ_BASE value, which is 0 regardless of CONFIG_I8259.
Testing this patch on those platforms is greatly appreciated. Thank
you.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/*
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* Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved.
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*
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*/
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#ifndef __ASM_RTLX_H
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#define __ASM_RTLX_H_
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#include <irq.h>
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#define LX_NODE_BASE 10
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#define MIPS_CPU_RTLX_IRQ 0
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#define RTLX_VERSION 2
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#define RTLX_xID 0x12345600
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#define RTLX_ID (RTLX_xID | RTLX_VERSION)
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#define RTLX_CHANNELS 8
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#define RTLX_CHANNEL_STDIO 0
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#define RTLX_CHANNEL_DBG 1
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#define RTLX_CHANNEL_SYSIO 2
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extern int rtlx_open(int index, int can_sleep);
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extern int rtlx_release(int index);
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extern ssize_t rtlx_read(int index, void *buff, size_t count, int user);
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extern ssize_t rtlx_write(int index, void *buffer, size_t count, int user);
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extern unsigned int rtlx_read_poll(int index, int can_sleep);
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extern unsigned int rtlx_write_poll(int index);
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enum rtlx_state {
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RTLX_STATE_UNUSED,
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RTLX_STATE_INITIALISED,
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RTLX_STATE_REMOTE_READY,
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RTLX_STATE_OPENED
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};
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#define RTLX_BUFFER_SIZE 1024
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/* each channel supports read and write.
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linux (vpe0) reads lx_buffer and writes rt_buffer
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SP (vpe1) reads rt_buffer and writes lx_buffer
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*/
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struct rtlx_channel {
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enum rtlx_state rt_state;
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enum rtlx_state lx_state;
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int buffer_size;
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/* read and write indexes per buffer */
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int rt_write, rt_read;
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char *rt_buffer;
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int lx_write, lx_read;
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char *lx_buffer;
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};
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struct rtlx_info {
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unsigned long id;
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enum rtlx_state state;
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struct rtlx_channel channel[RTLX_CHANNELS];
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};
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#endif /* __ASM_RTLX_H_ */
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