NetBSD-5.0.2/sys/arch/arm/arm32/arm32_machdep.c
/* $NetBSD: arm32_machdep.c,v 1.58 2008/08/07 04:17:25 matt Exp $ */
/*
* Copyright (c) 1994-1998 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* 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 Mark Brinicombe
* for the NetBSD Project.
* 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 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.
*
* Machine dependant functions for kernel setup
*
* Created : 17/09/94
* Updated : 18/04/01 updated for new wscons
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: arm32_machdep.c,v 1.58 2008/08/07 04:17:25 matt Exp $");
#include "opt_md.h"
#include "opt_cpuoptions.h"
#include "opt_pmap_debug.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/reboot.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/msgbuf.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/cpu.h>
#include <dev/cons.h>
#include <arm/arm32/katelib.h>
#include <arm/arm32/machdep.h>
#include <machine/bootconfig.h>
#include "md.h"
struct vm_map *mb_map = NULL;
struct vm_map *phys_map = NULL;
extern int physmem;
#if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE)
extern size_t md_root_size; /* Memory disc size */
#endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */
pv_addr_t kernelstack;
/* the following is used externally (sysctl_hw) */
char machine[] = MACHINE; /* from <machine/param.h> */
char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */
/* Our exported CPU info; we can have only one. */
struct cpu_info cpu_info_store = {
.ci_cpl = IPL_HIGH,
#ifndef PROCESS_ID_IS_CURLWP
.ci_curlwp = &lwp0,
#endif
};
void * msgbufaddr;
extern paddr_t msgbufphys;
int kernel_debug = 0;
struct user *proc0paddr;
/* exported variable to be filled in by the bootloaders */
char *booted_kernel;
/* Prototypes */
void data_abort_handler __P((trapframe_t *frame));
void prefetch_abort_handler __P((trapframe_t *frame));
extern void configure __P((void));
/*
* arm32_vector_init:
*
* Initialize the vector page, and select whether or not to
* relocate the vectors.
*
* NOTE: We expect the vector page to be mapped at its expected
* destination.
*/
void
arm32_vector_init(vaddr_t va, int which)
{
extern unsigned int page0[], page0_data[];
unsigned int *vectors = (int *) va;
unsigned int *vectors_data = vectors + (page0_data - page0);
int vec;
/*
* Loop through the vectors we're taking over, and copy the
* vector's insn and data word.
*/
for (vec = 0; vec < ARM_NVEC; vec++) {
if ((which & (1 << vec)) == 0) {
/* Don't want to take over this vector. */
continue;
}
vectors[vec] = page0[vec];
vectors_data[vec] = page0_data[vec];
}
/* Now sync the vectors. */
cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int));
vector_page = va;
if (va == ARM_VECTORS_HIGH) {
/*
* Assume the MD caller knows what it's doing here, and
* really does want the vector page relocated.
*
* Note: This has to be done here (and not just in
* cpu_setup()) because the vector page needs to be
* accessible *before* cpu_startup() is called.
* Think ddb(9) ...
*
* NOTE: If the CPU control register is not readable,
* this will totally fail! We'll just assume that
* any system that has high vector support has a
* readable CPU control register, for now. If we
* ever encounter one that does not, we'll have to
* rethink this.
*/
cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC);
}
}
/*
* Debug function just to park the CPU
*/
void
halt()
{
while (1)
cpu_sleep(0);
}
/* Sync the discs and unmount the filesystems */
void
bootsync(void)
{
static bool bootsyncdone = false;
if (bootsyncdone) return;
bootsyncdone = true;
/* Make sure we can still manage to do things */
if (GetCPSR() & I32_bit) {
/*
* If we get here then boot has been called without RB_NOSYNC
* and interrupts were disabled. This means the boot() call
* did not come from a user process e.g. shutdown, but must
* have come from somewhere in the kernel.
*/
IRQenable;
printf("Warning IRQ's disabled during boot()\n");
}
vfs_shutdown();
}
/*
* void cpu_startup(void)
*
* Machine dependant startup code.
*
*/
void
cpu_startup(void)
{
vaddr_t minaddr;
vaddr_t maxaddr;
u_int loop;
char pbuf[9];
/* Set the CPU control register */
cpu_setup(boot_args);
/* Lock down zero page */
vector_page_setprot(VM_PROT_READ);
/*
* Give pmap a chance to set up a few more things now the vm
* is initialised
*/
pmap_postinit();
/*
* Initialize error message buffer (at end of core).
*/
/* msgbufphys was setup during the secondary boot strap */
for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop)
pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE,
msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE);
pmap_update(pmap_kernel());
initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE));
/*
* Identify ourselves for the msgbuf (everything printed earlier will
* not be buffered).
*/
printf("%s%s", copyright, version);
format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem));
printf("total memory = %s\n", pbuf);
minaddr = 0;
/*
* Allocate a submap for physio
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, 0, false, NULL);
/*
* Finally, allocate mbuf cluster submap.
*/
mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
nmbclusters * mclbytes, VM_MAP_INTRSAFE,
false, NULL);
format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
printf("avail memory = %s\n", pbuf);
curpcb = &lwp0.l_addr->u_pcb;
curpcb->pcb_flags = 0;
curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr +
USPACE_SVC_STACK_TOP;
curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1;
}
/*
* machine dependent system variables.
*/
static int
sysctl_machdep_booted_device(SYSCTLFN_ARGS)
{
struct sysctlnode node;
if (booted_device == NULL)
return (EOPNOTSUPP);
node = *rnode;
node.sysctl_data = booted_device->dv_xname;
node.sysctl_size = strlen(booted_device->dv_xname) + 1;
return (sysctl_lookup(SYSCTLFN_CALL(&node)));
}
static int
sysctl_machdep_booted_kernel(SYSCTLFN_ARGS)
{
struct sysctlnode node;
if (booted_kernel == NULL || booted_kernel[0] == '\0')
return (EOPNOTSUPP);
node = *rnode;
node.sysctl_data = booted_kernel;
node.sysctl_size = strlen(booted_kernel) + 1;
return (sysctl_lookup(SYSCTLFN_CALL(&node)));
}
static int
sysctl_machdep_powersave(SYSCTLFN_ARGS)
{
struct sysctlnode node = *rnode;
int error, newval;
newval = cpu_do_powersave;
node.sysctl_data = &newval;
if (cpufuncs.cf_sleep == (void *) cpufunc_nullop)
node.sysctl_flags &= ~CTLFLAG_READWRITE;
error = sysctl_lookup(SYSCTLFN_CALL(&node));
if (error || newp == NULL || newval == cpu_do_powersave)
return (error);
if (newval < 0 || newval > 1)
return (EINVAL);
cpu_do_powersave = newval;
return (0);
}
SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup")
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "machdep", NULL,
NULL, 0, NULL, 0,
CTL_MACHDEP, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "debug", NULL,
NULL, 0, &kernel_debug, 0,
CTL_MACHDEP, CPU_DEBUG, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "booted_device", NULL,
sysctl_machdep_booted_device, 0, NULL, 0,
CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRING, "booted_kernel", NULL,
sysctl_machdep_booted_kernel, 0, NULL, 0,
CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "console_device", NULL,
sysctl_consdev, 0, NULL, sizeof(dev_t),
CTL_MACHDEP, CPU_CONSDEV, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "powersave", NULL,
sysctl_machdep_powersave, 0, &cpu_do_powersave, 0,
CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL);
}
void
parse_mi_bootargs(args)
char *args;
{
int integer;
if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer)
|| get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer))
if (integer)
boothowto |= RB_SINGLE;
if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer)
|| get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer))
if (integer)
boothowto |= RB_KDB;
if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer)
|| get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer))
if (integer)
boothowto |= RB_ASKNAME;
#ifdef PMAP_DEBUG
if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) {
pmap_debug_level = integer;
pmap_debug(pmap_debug_level);
}
#endif /* PMAP_DEBUG */
/* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer))
bufpages = integer;*/
#if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE)
if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer)
|| get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) {
md_root_size = integer;
md_root_size *= 1024;
if (md_root_size < 32*1024)
md_root_size = 32*1024;
if (md_root_size > 2048*1024)
md_root_size = 2048*1024;
}
#endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */
if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer)
|| get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer))
if (integer)
boothowto |= AB_QUIET;
if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer)
|| get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer))
if (integer)
boothowto |= AB_VERBOSE;
}
void
cpu_need_resched(struct cpu_info *ci, int flags)
{
bool immed = (flags & RESCHED_IMMED) != 0;
if (ci->ci_want_resched && !immed)
return;
ci->ci_want_resched = 1;
if (curlwp != ci->ci_data.cpu_idlelwp)
setsoftast();
}
bool
cpu_intr_p(void)
{
return curcpu()->ci_intr_depth != 0;
}
#ifdef __HAVE_FAST_SOFTINTS
#if IPL_SOFTSERIAL != IPL_SOFTNET + 1
#error IPLs are screwed up
#elif IPL_SOFTNET != IPL_SOFTBIO + 1
#error IPLs are screwed up
#elif IPL_SOFTBIO != IPL_SOFTCLOCK + 1
#error IPLs are screwed up
#elif !(IPL_SOFTCLOCK > IPL_NONE)
#error IPLs are screwed up
#elif (IPL_NONE != 0)
#error IPLs are screwed up
#endif
#define SOFTINT2IPLMAP \
(((IPL_SOFTSERIAL - IPL_SOFTCLOCK) << (SOFTINT_SERIAL * 4)) | \
((IPL_SOFTNET - IPL_SOFTCLOCK) << (SOFTINT_NET * 4)) | \
((IPL_SOFTBIO - IPL_SOFTCLOCK) << (SOFTINT_BIO * 4)) | \
((IPL_SOFTCLOCK - IPL_SOFTCLOCK) << (SOFTINT_CLOCK * 4)))
#define SOFTINT2IPL(l) ((SOFTINT2IPLMAP >> ((l) * 4)) & 0x0f)
/*
* This returns a mask of softint IPLs that be dispatch at <ipl>
* SOFTIPLMASK(IPL_NONE) = 0xffffffff
* SOFTIPLMASK(IPL_SOFTCLOCK) = 0xfffffff0
*/
#define SOFTIPLMASK(ipl) (~0 << (ipl))
void softint_switch(lwp_t *, int);
void
softint_trigger(uintptr_t mask)
{
curcpu()->ci_softints |= mask;
}
void
softint_init_md(lwp_t *l, u_int level, uintptr_t *machdep)
{
lwp_t ** lp = &curcpu()->ci_softlwps[level];
KASSERT(*lp == NULL || *lp == l);
*lp = l;
*machdep = 1 << SOFTINT2IPL(level);
}
void
dosoftints(void)
{
struct cpu_info * const ci = curcpu();
const int opl = ci->ci_cpl;
const uint32_t softiplmask = SOFTIPLMASK(opl);
for (;;) {
u_int softints = ci->ci_softints & softiplmask;
if (softints == 0)
return;
ci->ci_cpl = IPL_HIGH;
#define DOSOFTINT(n) \
if (softints & (1 << (IPL_SOFT ## n - IPL_SOFTCLOCK))) { \
ci->ci_softints &= \
~(1 << (IPL_SOFT ## n - IPL_SOFTCLOCK)); \
softint_switch(ci->ci_softlwps[SOFTINT_ ## n], \
IPL_SOFT ## n); \
ci->ci_cpl = opl; \
continue; \
}
DOSOFTINT(SERIAL);
DOSOFTINT(NET);
DOSOFTINT(BIO);
DOSOFTINT(CLOCK);
panic("dosoftints wtf (softints=%u?, ipl=%d)", softints, opl);
}
}
#endif /* __HAVE_FAST_SOFTINTS */