File: [local] / sys / arch / arm / arm / process_machdep.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:05:10 2008 UTC (16 years, 6 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
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)
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/* $OpenBSD: process_machdep.c,v 1.3 2005/12/16 21:36:31 miod Exp $ */
/* $NetBSD: process_machdep.c,v 1.11 2003/08/07 16:26:52 agc Exp $ */
/*
* Copyright (c) 1993 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* 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 of the University 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 REGENTS 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 REGENTS 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.
*
* From:
* Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel
*/
/*
* Copyright (c) 1995 Frank Lancaster. All rights reserved.
* Copyright (c) 1995 Tools GmbH. All rights reserved.
* Copyright (c) 1995 Charles M. Hannum. All rights reserved.
* Copyright (c) 1993 Jan-Simon Pendry
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* From:
* Id: procfs_i386.c,v 4.1 1993/12/17 10:47:45 jsp Rel
*/
/*
* This file may seem a bit stylized, but that so that it's easier to port.
* Functions to be implemented here are:
*
* process_read_regs(proc, regs)
* Get the current user-visible register set from the process
* and copy it into the regs structure (<machine/reg.h>).
* The process is stopped at the time read_regs is called.
*
* process_write_regs(proc, regs)
* Update the current register set from the passed in regs
* structure. Take care to avoid clobbering special CPU
* registers or privileged bits in the PSL.
* The process is stopped at the time write_regs is called.
*
* process_sstep(proc, sstep)
* Arrange for the process to trap or not trap depending on sstep
* after executing a single instruction.
*
* process_set_pc(proc)
* Set the process's program counter.
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <sys/systm.h>
#include <sys/user.h>
#include <machine/frame.h>
#include <machine/pcb.h>
#include <machine/reg.h>
#include <arm/armreg.h>
#ifdef ARMFPE
#include <arm/fpe-arm/armfpe.h>
#endif
static __inline struct trapframe *
process_frame(struct proc *p)
{
return p->p_addr->u_pcb.pcb_tf;
}
int
process_read_regs(struct proc *p, struct reg *regs)
{
struct trapframe *tf = process_frame(p);
KASSERT(tf != NULL);
bcopy((caddr_t)&tf->tf_r0, (caddr_t)regs->r, sizeof(regs->r));
regs->r_sp = tf->tf_usr_sp;
regs->r_lr = tf->tf_usr_lr;
regs->r_pc = tf->tf_pc;
regs->r_cpsr = tf->tf_spsr;
#ifdef DIAGNOSTIC
if ((tf->tf_spsr & PSR_MODE) == PSR_USR32_MODE
&& tf->tf_spsr & I32_bit)
panic("process_read_regs: Interrupts blocked in user process");
#endif
return(0);
}
int
process_read_fpregs(struct proc *p, struct fpreg *regs)
{
#ifdef ARMFPE
arm_fpe_getcontext(p, regs);
return(0);
#else /* ARMFPE */
/* No hardware FP support */
memset(regs, 0, sizeof(struct fpreg));
return(0);
#endif /* ARMFPE */
}
#ifdef PTRACE
int
process_write_regs(struct proc *p, struct reg *regs)
{
struct trapframe *tf = process_frame(p);
KASSERT(tf != NULL);
bcopy((caddr_t)regs->r, (caddr_t)&tf->tf_r0, sizeof(regs->r));
tf->tf_usr_sp = regs->r_sp;
tf->tf_usr_lr = regs->r_lr;
#ifdef __PROG32
tf->tf_pc = regs->r_pc;
tf->tf_spsr &= ~PSR_FLAGS;
tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS;
#ifdef DIAGNOSTIC
if ((tf->tf_spsr & PSR_MODE) == PSR_USR32_MODE
&& tf->tf_spsr & I32_bit)
panic("process_write_regs: Interrupts blocked in user process");
#endif
#else /* __PROG26 */
if ((regs->r_pc & (R15_MODE | R15_IRQ_DISABLE | R15_FIQ_DISABLE)) != 0)
return EPERM;
tf->tf_r15 = regs->r_pc;
#endif
return(0);
}
int
process_write_fpregs(struct proc *p, struct fpreg *regs)
{
#ifdef ARMFPE
arm_fpe_setcontext(p, regs);
return(0);
#else /* ARMFPE */
/* No hardware FP support */
return(0);
#endif /* ARMFPE */
}
int
process_sstep(struct proc *p, int sstep)
{
if (sstep)
return (EINVAL);
return 0;
}
int
process_set_pc(struct proc *p, caddr_t addr)
{
struct trapframe *tf = process_frame(p);
KASSERT(tf != NULL);
#ifdef __PROG32
tf->tf_pc = (int)addr;
#else /* __PROG26 */
/* Only set the PC, not the PSR */
if (((register_t)addr & R15_PC) != (register_t)addr)
return EINVAL;
tf->tf_r15 = (tf->tf_r15 & ~R15_PC) | (register_t)addr;
#endif
return (0);
}
#endif /* PTRACE */