newlib-cygwin/libgloss/sparc_leon/kernel_thread.c

215 lines
6.2 KiB
C

/*
* Copyright (c) 2011 Aeroflex Gaisler
*
* BSD license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <asm-leon/queue.h>
/*#include <sys/fsu_pthread_queue.h>*/
#include <asm-leon/contextswitch.h>
#include <asm-leon/leonbare_kernel.h>
#include <asm-leon/leonbare_debug.h>
#include <asm-leon/stack.h>
#include <asm-leon/leonstack.h>
#include <asm-leon/irq.h>
int
leonbare_thread_resume (leonbare_thread_t thread)
{
leonbare_thread_t i = 0;
if ((thread->th_flags & LEONBARE_TH_SUSPENDED) &&
!(thread->th_flags & (LEONBARE_TH_TERMINATED | LEONBARE_TH_FINISHED)))
{
LEONBARE_PROTECT_KERNEL_START ();
{
unsigned int idx = leonbare_thread_getqueueidx (thread);
if (idx != -1)
{
LBTAILQ_REMOVE (LEONBARE_KR_RUNQ (idx), thread, th_runq);
}
if (thread->th_pri_idx != -1)
{
thread->th_runq_idx = thread->th_pri_idx;
thread->th_runq_which = LEONBARE_KR_RUNQ_WHICH;
LBTAILQ_INSERT_HEAD (LEONBARE_KR_RUNQ (thread->th_runq_idx),
thread, th_runq);
LEONBARE_TH_SETSTATE (thread, LEONBARE_TH_READY);
}
}
LEONBARE_PROTECT_KERNEL_END ();
}
}
int
leonbare_thread_terminate (leonbare_thread_t thread)
{
unsigned int ret = 0;
leonbare_thread_t c = LEONBARE_KR_CURRENT;
LEONBARE_PROTECT_KERNEL_START ();
{
unsigned int idx = leonbare_thread_getqueueidx (thread);
if (LEONBARE_RUNQ_ISREADY (idx) || LEONBARE_RUNQ_ISPREPARE (idx) ||
LEONBARE_RUNQ_ISSUSPEND (idx))
{
LBTAILQ_REMOVE (LEONBARE_KR_RUNQ (idx), thread, th_runq);
}
else
{
LBPASSERT (LEONBARE_RUNQ_ISKILLED (idx),
"thread %s is in no queue ",
LEONBARE_TH_NAME_DBG (thread));
}
LEONBARE_TH_SETSTATE (thread, LEONBARE_TH_TERMINATED);
LBTAILQ_INSERT_HEAD (LEONBARE_KR_RUNQ (LEONBARE_RUNQ_KILLED_IDX), thread,
th_runq);
LEONBARE_PRINTQUEUES ();
LEONBARE_VERIFYSCHED ();
}
if (thread == LEONBARE_KR_CURRENT)
{
ret = reschedule ();
/* never come here */
LEONBARE_STOPALL;
}
LEONBARE_PROTECT_KERNEL_END ();
return ret;
}
int
current_suspend ()
{
unsigned int ret = 0;
leonbare_thread_t c = LEONBARE_KR_CURRENT;
LEONBARE_PROTECT_KERNEL_START ();
{
LBPASSERT ((c->th_runq_which == LEONBARE_KR_RUNQ_WHICH),
"Current thread cannot be on the prepare queue", 0);
LBTAILQ_REMOVE (LEONBARE_KR_RUNQ (c->th_runq_idx), c, th_runq);
LBTAILQ_INSERT_TAIL (LEONBARE_KR_RUNQ (LEONBARE_RUNQ_SUSPENDED_IDX),
c, th_runq);
c->th_runq_idx = LEONBARE_RUNQ_SUSPENDED_IDX;
LEONBARE_TH_SETSTATE (c, LEONBARE_TH_SUSPENDED);
LEONBARE_VERIFYSCHED ();
}
ret = reschedule ();
LEONBARE_PROTECT_KERNEL_END ();
return ret;
}
void
_leonbare_thread_body ()
{
LBDEBUG_FNCALL;
leonbare_thread_t thread = LEONBARE_KR_CURRENT;
LEONBARE_KR_IS_IN_KERNEL = 0;
thread->th_result = thread->th_func (thread->th_arg);
leonbare_thread_terminate (thread);
LBDEBUG_FNEXIT;
}
#define LEONBARE_BODY_OFFSET 200
int
leonbare_thread_create (struct leonbare_thread *thread, char *stack,
int stacksize)
{
LEONBARE_PROTECT_DECL (flags);
struct sparc_stackframe_regs *sp;
unsigned int v;
unsigned int fpspill, bodysp, bodyfp;
struct leonbare_thread_ctx *threadctx;
LBDEBUG_FNCALL;
thread->th_stack_base = (char *) LEONBARE_STACKALIGN (stack);
stacksize -= thread->th_stack_base - stack;
thread->th_stack_size = stacksize;
thread->th_runq_idx = 0;
thread->th_pri_idx = 0;
thread->th_account = 0;
thread->th_caccount = 0;
/* stack:
* 0:+--------------------------------+ <- thread.th_stack_base
* | .... |
* +--------------------------------+ <- thread.th_ctx->out[6] (%sp)
* | _leonbare_thread_body() frame |
* +--------------------------------+ <- thread.th_ctx->sf_ins[6] (%fp)
* | WINDOWSPILL |
* +--------------------------------+ <- thread.th_ctx->fpu
* | struct sparc_fpuwindow_regs |
* +--------------------------------+ <- thread.th_stack_base + thread->th_stack_size
*
*/
v = (unsigned int) (thread->th_stack_base +
LEONBARE_STACKALIGN (thread->th_stack_size -
(LEONBARE_BODY_OFFSET +
WINDOWSIZE + FW_REGS_SZ)));
bodysp = ((unsigned int) v);
bodyfp = ((unsigned int) bodysp) + LEONBARE_BODY_OFFSET;
fpspill = ((unsigned int) bodyfp) + WINDOWSIZE;
thread->th_ctx.outs[6] = (unsigned int) bodysp;
thread->th_ctx.outs[7] = (int) _leonbare_thread_body;
thread->th_ctx.outs[7] -= 8;
thread->th_ctx.sf_ins[6] = (unsigned int) bodyfp;
thread->th_ctx.fpu = (unsigned int) fpspill;
thread->th_ctx.magic = LEONBARE_THREAD_CTX_MAGIC;
thread->th_ctx.psr = 0x0e0;
thread->th_ctx.wim = 0x2;
LBDEBUG_HEADER_PRINTF (LBDEBUG_THREAD_NR,
"Thread %s (0x%x): stack [0x%x-0x%x] \n",
LEONBARE_TH_NAME_DBG (thread), thread,
thread->th_stack_base,
thread->th_stack_base + thread->th_stack_size);
/* newlibc reent */
thread->th_reentp = &(thread->th_reent);
_REENT_INIT_PTR (thread->th_reentp);
LEONBARE_PROTECT_KERNEL_START ();
/* queues */
LBTAILQ_INSERT_TAIL (LEONBARE_KR_ALLQ, thread, th_allq);
LBTAILQ_INSERT_TAIL (LEONBARE_KR_RUNQ (thread->th_runq_idx), thread,
th_runq);
LEONBARE_PRINTQUEUES ();
LEONBARE_PROTECT_KERNEL_END ();
LBDEBUG_FNEXIT;
}