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File: [local] / sys / arch / arm / arm / ast.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:05:07 2008 UTC (16 years, 3 months ago) by nbrk
Import of OpenBSD 4.2 release kernel tree with initial code to support Jornada 720/728, StrongARM 1110-based handheld PC. At this point kernel roots on NFS and boots into vfs_mountroot() and traps. What is supported: - glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode (needs some palette tweaks for non black/white/blue colors, i think) - saic, SA11x0 interrupt controller (needs cleanup) - sacom, SA11x0 UART (supported only as boot console for now) - SA11x0 GPIO controller fully supported (but can't handle multiple interrupt handlers on one gpio pin) - sassp, SSP port on SA11x0 that attaches spibus - Jornada microcontroller (jmcu) to control kbd, battery, etc throught the SPI bus (wskbd attaches on jmcu, but not tested) - tod functions seem work - initial code for SA-1111 (chip companion) : this is TODO Next important steps, i think: - gpio and intc on sa1111 - pcmcia support for sa11x0 (and sa1111 help logic) - REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs) - root on wd0! (using already supported PCMCIA-ATA) |
/* $OpenBSD: ast.c,v 1.8 2007/05/14 07:07:09 art Exp $ */ /* $NetBSD: ast.c,v 1.6 2003/10/31 16:44:34 cl Exp $ */ /* * Copyright (c) 1994,1995 Mark Brinicombe * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the RiscBSD team. * 4. The name of the company nor the name of the author may be used to * endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR OR CONTRIBUTERS 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. * * RiscBSD kernel project * * ast.c * * Code to handle ast's and returns to user mode * * Created : 11/10/94 */ #include <sys/param.h> #include <sys/proc.h> #include <sys/user.h> #include <sys/acct.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/signal.h> #include <sys/signalvar.h> #include <sys/vmmeter.h> #include <machine/cpu.h> #include <machine/frame.h> #include <machine/cpu.h> #include <arm/cpufunc.h> #include <uvm/uvm_extern.h> #ifdef acorn26 #include <machine/machdep.h> #endif /* * Prototypes */ void ast(struct trapframe *); int want_resched; extern int astpending; void userret(struct proc *p) { int sig; /* Take pending signals. */ while ((sig = (CURSIG(p))) != 0) postsig(sig); p->p_cpu->ci_schedstate.spc_curpriority = p->p_priority = p->p_usrpri; } /* * Handle asynchronous system traps. * This is called from the irq handler to deliver signals * and switch processes if required. */ void ast(struct trapframe *tf) { struct proc *p = curproc; #ifdef acorn26 /* Enable interrupts if they were enabled before the trap. */ if ((tf->tf_r15 & R15_IRQ_DISABLE) == 0) int_on(); #else /* Interrupts were restored by exception_exit. */ #endif uvmexp.traps++; uvmexp.softs++; #ifdef DEBUG if (p == NULL) panic("ast: no curproc!"); if (&p->p_addr->u_pcb == 0) panic("ast: no pcb!"); #endif if (p->p_flag & P_OWEUPC) { ADDUPROF(p); } /* Allow a forced task switch. */ if (want_resched) preempt(NULL); userret(p); } /* End of ast.c */