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/****************************************************************************
* arch/rgmp/src/x86/arch_nuttx.c
*
* Copyright (C) 2011 Yu Qiang. All rights reserved.
* Author: Yu Qiang <yuq825@gmail.com>
*
* This file is a part of NuttX:
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#include <rgmp/pmap.h>
#include <rgmp/string.h>
#include <rgmp/arch/fpu.h>
#include <arch/arch.h>
#include <nuttx/sched.h>
#include <os_internal.h>
void nuttx_arch_init(void)
{
extern void e1000_mod_init(void);
extern void up_serialinit(void);
// setup COM device
up_serialinit();
#ifdef CONFIG_NET_E1000
// setup e1000
e1000_mod_init();
#endif
}
void nuttx_arch_exit(void)
{
extern void e1000_mod_exit(void);
#ifdef CONFIG_NET_E1000
e1000_mod_exit();
#endif
}
void up_initial_state(_TCB *tcb)
{
struct Trapframe *tf;
if (tcb->pid != 0) {
tf = (struct Trapframe *)tcb->adj_stack_ptr-1;
memset(tf, 0, sizeof(struct Trapframe));
tf->tf_fpu = rgmp_fpu_init_regs;
tf->tf_eflags = 0x00000202;
tf->tf_cs = GD_KT;
tf->tf_ds = GD_KD;
tf->tf_es = GD_KD;
tf->tf_eip = (uint32_t)tcb->start;
tcb->xcp.tf = tf;
}
}
void push_xcptcontext(struct xcptcontext *xcp)
{
xcp->save_eip = xcp->tf->tf_eip;
xcp->save_eflags = xcp->tf->tf_eflags;
// set up signal entry with interrupts disabled
xcp->tf->tf_eip = (uint32_t)up_sigentry;
xcp->tf->tf_eflags = 0;
}
void pop_xcptcontext(struct xcptcontext *xcp)
{
xcp->tf->tf_eip = xcp->save_eip;
xcp->tf->tf_eflags = xcp->save_eflags;
}
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