File: [local] / sys / arch / hp300 / hp300 / vm_machdep.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:05:38 2008 UTC (16 years, 3 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)
|
/* $OpenBSD: vm_machdep.c,v 1.43 2007/05/27 20:59:25 miod Exp $ */
/* $NetBSD: vm_machdep.c,v 1.60 2001/07/06 05:53:35 chs Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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: Utah $Hdr: vm_machdep.c 1.21 91/04/06$
*
* @(#)vm_machdep.c 8.6 (Berkeley) 1/12/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/vnode.h>
#include <sys/user.h>
#include <sys/core.h>
#include <sys/exec.h>
#include <sys/ptrace.h>
#include <machine/frame.h>
#include <machine/cpu.h>
#include <machine/pte.h>
#include <machine/reg.h>
#include <uvm/uvm_extern.h>
/*
* Finish a fork operation, with process p2 nearly set up.
* Copy and update the pcb and trap frame, making the child ready to run.
*
* Rig the child's kernel stack so that it will start out in
* proc_trampoline() and call child_return() with p2 as an
* argument. This causes the newly-created child process to go
* directly to user level with an apparent return value of 0 from
* fork(), while the parent process returns normally.
*
* p1 is the process being forked; if p1 == &proc0, we are creating
* a kernel thread, and the return path and argument are specified with
* `func' and `arg'.
*
* If an alternate user-level stack is requested (with non-zero values
* in both the stack and stacksize args), set up the user stack pointer
* accordingly.
*/
void
cpu_fork(p1, p2, stack, stacksize, func, arg)
struct proc *p1, *p2;
void *stack;
size_t stacksize;
void (*func)(void *);
void *arg;
{
struct pcb *pcb = &p2->p_addr->u_pcb;
struct trapframe *tf;
struct switchframe *sf;
extern struct pcb *curpcb;
p2->p_md.md_flags = p1->p_md.md_flags;
/* Copy pcb from proc p1 to p2. */
if (p1 == curproc) {
/* Sync the PCB before we copy it. */
savectx(curpcb);
}
#ifdef DIAGNOSTIC
else if (p1 != &proc0)
panic("cpu_fork: curproc");
#endif
*pcb = p1->p_addr->u_pcb;
/*
* Copy the trap frame.
*/
tf = (struct trapframe *)((u_int)p2->p_addr + USPACE) - 1;
p2->p_md.md_regs = (int *)tf;
*tf = *(struct trapframe *)p1->p_md.md_regs;
/*
* If specified, give the child a different stack.
*/
if (stack != NULL)
tf->tf_regs[15] = (u_int)stack + stacksize;
sf = (struct switchframe *)tf - 1;
sf->sf_pc = (u_int)proc_trampoline;
pcb->pcb_regs[6] = (int)func; /* A2 */
pcb->pcb_regs[7] = (int)arg; /* A3 */
pcb->pcb_regs[11] = (int)sf; /* SSP */
pcb->pcb_ps = PSL_LOWIPL; /* start kthreads at IPL 0 */
}
/*
* cpu_exit is called as the last action during exit.
*
* Block context switches and then call switch_exit() which will
* switch to another process thus we never return.
*/
void
cpu_exit(p)
struct proc *p;
{
(void) splhigh();
switch_exit(p);
/* NOTREACHED */
}
/*
* Dump the machine specific header information at the start of a core dump.
*/
struct md_core {
struct reg intreg;
struct fpreg freg;
};
int
cpu_coredump(p, vp, cred, chdr)
struct proc *p;
struct vnode *vp;
struct ucred *cred;
struct core *chdr;
{
struct md_core md_core;
struct coreseg cseg;
int error;
CORE_SETMAGIC(*chdr, COREMAGIC, MID_MACHINE, 0);
chdr->c_hdrsize = ALIGN(sizeof(*chdr));
chdr->c_seghdrsize = ALIGN(sizeof(cseg));
chdr->c_cpusize = sizeof(md_core);
/* Save integer registers. */
error = process_read_regs(p, &md_core.intreg);
if (error)
return error;
if (fputype) {
/* Save floating point registers. */
error = process_read_fpregs(p, &md_core.freg);
if (error)
return error;
} else {
/* Make sure these are clear. */
bzero((caddr_t)&md_core.freg, sizeof(md_core.freg));
}
CORE_SETMAGIC(cseg, CORESEGMAGIC, MID_MACHINE, CORE_CPU);
cseg.c_addr = 0;
cseg.c_size = chdr->c_cpusize;
error = vn_rdwr(UIO_WRITE, vp, (caddr_t)&cseg, chdr->c_seghdrsize,
(off_t)chdr->c_hdrsize, UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred,
NULL, p);
if (error)
return error;
error = vn_rdwr(UIO_WRITE, vp, (caddr_t)&md_core, sizeof(md_core),
(off_t)(chdr->c_hdrsize + chdr->c_seghdrsize), UIO_SYSSPACE,
IO_NODELOCKED|IO_UNIT, cred, NULL, p);
if (error)
return error;
chdr->c_nseg++;
return 0;
}
/*
* Map a user I/O request into kernel virtual address space.
* Note: the pages are already locked by uvm_vslock(), so we
* do not need to pass an access_type to pmap_enter().
*/
void
vmapbuf(bp, len)
struct buf *bp;
vsize_t len;
{
struct pmap *upmap, *kpmap;
vaddr_t uva; /* User VA (map from) */
vaddr_t kva; /* Kernel VA (new to) */
paddr_t pa; /* physical address */
vsize_t off;
if ((bp->b_flags & B_PHYS) == 0)
panic("vmapbuf");
uva = trunc_page((vaddr_t)(bp->b_saveaddr = bp->b_data));
off = (vaddr_t)bp->b_data - uva;
len = round_page(off + len);
kva = uvm_km_valloc_wait(phys_map, len);
bp->b_data = (caddr_t)(kva + off);
upmap = vm_map_pmap(&bp->b_proc->p_vmspace->vm_map);
kpmap = vm_map_pmap(phys_map);
do {
if (pmap_extract(upmap, uva, &pa) == FALSE)
panic("vmapbuf: null page frame");
pmap_enter(kpmap, kva, pa, VM_PROT_READ|VM_PROT_WRITE,
VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
uva += PAGE_SIZE;
kva += PAGE_SIZE;
len -= PAGE_SIZE;
} while (len);
pmap_update(pmap_kernel());
}
/*
* Unmap a previously-mapped user I/O request.
*/
void
vunmapbuf(bp, len)
struct buf *bp;
vsize_t len;
{
vaddr_t kva;
vsize_t off;
if ((bp->b_flags & B_PHYS) == 0)
panic("vunmapbuf");
kva = trunc_page((vaddr_t)(bp->b_data));
off = (vaddr_t)bp->b_data - kva;
len = round_page(off + len);
pmap_remove(vm_map_pmap(phys_map), kva, kva + len);
pmap_update(pmap_kernel());
uvm_km_free_wakeup(phys_map, kva, len);
bp->b_data = bp->b_saveaddr;
bp->b_saveaddr = 0;
}