NetBSD/sys/arch/evbarm/mpcsa/mpcsa_machdep.c
dyoung 94d985722a It is not appropriate to call pmf_system_shutdown(9) from
doshutdownhooks(9): shutdown hooks registered by shutdownhook_establish(9)
expect to be called with interrupts disabled, but shutdown hooks
registered with pmf_device_register1(9) expect to be called with
interrupts enabled.  So I have made two changes:

1 Do not call pmf_system_shutdown() from doshutdownhooks().  Instead,
change every call to doshutdownhooks() to a call to doshutdownhooks()
followed by a call to pmf_system_shutdown().  No functional change
is intended by this change.

2 Make i386 re-enable interrupts briefly while it calls
pmf_system_shutdown().  I leave it to others either to fix the
other ports, or to factor out some MI shutdown code, as joerg@
suggests, and fix that.  Note that a functional change *is* intended
by this change.

I hope that this patch will stop us from flip-flopping between
calling doshutdownhooks() and pmf_system_shutdown() sometimes with
and sometimes without interrupts enabled.
2008-11-11 06:46:40 +00:00

397 lines
11 KiB
C

/* $Id: mpcsa_machdep.c,v 1.3 2008/11/11 06:46:41 dyoung Exp $ */
/* $NetBSD: mpcsa_machdep.c,v 1.3 2008/11/11 06:46:41 dyoung Exp $ */
/*
* Copyright (c) 2007 Embedtronics Oy
* Based on tsarm_machdep.c
*
* Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Based on code written by Jason R. Thorpe and Steve C. Woodford for
* Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* Copyright (c) 1997,1998 Mark Brinicombe.
* Copyright (c) 1997,1998 Causality Limited.
* 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 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 for Iyonix.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mpcsa_machdep.c,v 1.3 2008/11/11 06:46:41 dyoung Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include "opt_pmap_debug.h"
#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/exec.h>
#include <sys/proc.h>
#include <sys/msgbuf.h>
#include <sys/reboot.h>
#include <sys/termios.h>
#include <sys/ksyms.h>
#include <uvm/uvm_extern.h>
#include <dev/cons.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#define DRAM_BLOCKS 1
#include <machine/bootconfig.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/frame.h>
#include <arm/undefined.h>
#include <arm/arm32/machdep.h>
#include <arm/at91/at91reg.h>
#include <arm/at91/at91var.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <machine/autoconf.h>
#include "seeprom.h"
#if NSEEPROM > 0
#include <net/if.h>
#include <net/if_ether.h>
#include <dev/i2c/i2cvar.h>
#include <dev/i2c/at24cxxvar.h>
#endif
#include <arm/at91/at91twivar.h>
#if TODO
#include "epcom.h"
#if NEPCOM > 0
#include <arm/ep93xx/epcomvar.h>
#endif
#include "isa.h"
#if NISA > 0
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#endif
#include <machine/isa_machdep.h>
#include <evbarm/mpcsa/mpcsareg.h>
#endif // TODO
#include <arm/at91/at91rm9200reg.h>
#include <arm/at91/at91rm9200busvar.h>
#include "opt_ipkdb.h"
#include "ksyms.h"
#include <arm/at91/at91busvar.h>
#include <arm/at91/at91pdcreg.h>
#include <arm/at91/at91dbgureg.h>
#include <arm/at91/at91reg.h>
#include <arm/at91/at91streg.h>
/*
* Address to call from cpu_reset() to reset the machine.
* This is machine architecture dependant as it varies depending
* on where the ROM appears when you turn the MMU off.
*/
u_int cpu_reset_address = 0x00000000;
/* boot configuration: */
BootConfig bootconfig; /* Boot config storage */
char *boot_args = NULL;
char *boot_file = NULL;
/* hmmm */
static struct arm32_dma_range mpcsa_dma_ranges[4];
static struct at91bus_machdep mpcsabus;
static at91bus_tag_t old_at91bus_tag;
/* Prototypes */
static void mpcsa_device_register(device_t dev, void *aux);
static void mpcsabus_init(struct at91bus_clocks *);
static void mpcsabus_peripheral_clock(int pid, int enable);
static uint32_t mpcsabus_gpio_mask(int pid);
/*
* void cpu_reboot(int howto, char *bootstr)
*
* Reboots the system
*
* Deal with any syncing, unmounting, dumping and shutdown hooks,
* then reset the CPU.
*/
void
cpu_reboot(int howto, char *bootstr)
{
/*
* If we are still cold then hit the air brakes
* and crash to earth fast
*/
if (cold) {
doshutdownhooks();
pmf_system_shutdown(boothowto);
printf("\r\n");
printf("The operating system has halted.\r\n");
printf("Please press any key to reboot.\r\n");
cngetc();
printf("\r\nrebooting...\r\n");
goto reset;
}
/* Disable console buffering */
/*
* If RB_NOSYNC was not specified sync the discs.
* Note: Unless cold is set to 1 here, syslogd will die during the
* unmount. It looks like syslogd is getting woken up only to find
* that it cannot page part of the binary in as the filesystem has
* been unmounted.
*/
if (!(howto & RB_NOSYNC))
bootsync();
/* Say NO to interrupts */
splhigh();
/* Do a dump if requested. */
if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
dumpsys();
/* Run any shutdown hooks */
doshutdownhooks();
pmf_system_shutdown(boothowto);
/* Make sure IRQ's are disabled */
IRQdisable;
if (howto & RB_HALT) {
printf("\r\n");
printf("The operating system has halted.\r\n");
printf("Please press any key to reboot.\r\n");
cngetc();
}
printf("\r\nrebooting...\r\n");
reset:
/*
* Make really really sure that all interrupts are disabled,
* and poke the Internal Bus and Peripheral Bus reset lines.
*/
(void) disable_interrupts(I32_bit|F32_bit);
STREG(ST_WDMR) = ST_WDMR_EXTEN | ST_WDMR_RSTEN | 1;
STREG(ST_CR) = ST_CR_WDRST;
for (;;);
}
/*
* u_int initarm(...)
*
* Initial entry point on startup. This gets called before main() is
* entered.
* It should be responsible for setting up everything that must be
* in place when main is called.
* This includes
* Taking a copy of the boot configuration structure.
* Initialising the physical console so characters can be printed.
* Setting up page tables for the kernel
* Initialising interrupt controllers to a sane default state
*/
u_int
initarm(void *arg)
{
u_int ret;
/*
* basic AT91 initialization:
*/
if (at91bus_init())
panic("%s: at91bus_init() failed", __FUNCTION__);
if (AT91_CHIP_ID() == AT91RM9200_CHIP_ID) {
memcpy(&mpcsabus, at91bus_tag, sizeof(mpcsabus));
mpcsabus.init = mpcsabus_init;
mpcsabus.peripheral_clock = mpcsabus_peripheral_clock;
mpcsabus.gpio_mask = mpcsabus_gpio_mask;
old_at91bus_tag = at91bus_tag;
at91bus_tag = &mpcsabus;
}
/* Fake bootconfig structure for the benefit of pmap.c */
/* XXX must make the memory description h/w independent */
bootconfig.dramblocks = 1;
bootconfig.dram[0].address = 0x20000000UL;
bootconfig.dram[0].pages = 0x04000000UL / PAGE_SIZE;
ret = at91bus_setup(&bootconfig);
if (AT91_CHIP_ID() != AT91RM9200_CHIP_ID)
panic("%s: processor is not AT91RM9200", __FUNCTION__);
/* we've a specific device_register routine */
evbarm_device_register = mpcsa_device_register;
/* We return the new stack pointer address */
return ret;
}
bus_dma_tag_t
at91_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template)
{
int i;
struct arm32_bus_dma_tag *dmat;
for (i = 0; i < bootconfig.dramblocks; i++) {
mpcsa_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address;
mpcsa_dma_ranges[i].dr_busbase = bootconfig.dram[i].address;
mpcsa_dma_ranges[i].dr_len = bootconfig.dram[i].pages *
PAGE_SIZE;
}
dmat = dma_tag_template;
dmat->_ranges = mpcsa_dma_ranges;
dmat->_nranges = bootconfig.dramblocks;
return dmat;
}
void mpcsabus_init(struct at91bus_clocks *clocks)
{
(*old_at91bus_tag->init)(clocks);
}
uint32_t mpcsabus_gpio_mask(int pid)
{
switch (pid) {
case PID_PIOA: return ~0x00000300U;
case PID_PIOB: return ~0x0000783FU;
case PID_PIOC: return ~0x00000000U;
case PID_PIOD: return ~0x0003F000U;
default: return ~0x00000000U;
}
}
void mpcsabus_peripheral_clock(int pid, int enable)
{
switch (pid) {
case PID_TWI:
if (enable) {
PIOA_WRITE(PIO_ASR, 0x06000000); // assign to peripheral A
PIOA_WRITE(PIO_PDR, 0x06000000); // assign to peripherals
PIOA_WRITE(PIO_MDER, 0x06000000); // I2C pins in open-drain mode
}
break;
case PID_SPI:
if (enable) {
PIOA_WRITE(PIO_ASR, 0x00000007); // assign to peripheral A
PIOA_WRITE(PIO_PDR, 0x00000007); // assign to peripherals
}
break;
}
(*old_at91bus_tag->peripheral_clock)(pid, enable);
}
static void mpcsa_device_register(device_t dev, void *aux)
{
static uint8_t eth_addr[ETHER_ADDR_LEN];
if (device_is_a(dev, "at91emac")) {
cfdriver_t cd = config_cfdriver_lookup("at91twi");
device_t twi_dev = 0;
i2c_tag_t i2c = 0;
if (cd && (twi_dev = device_lookup(cd, 0)) != NULL) {
struct at91twi_softc *sc = (struct at91twi_softc *)twi_dev;
i2c = &sc->sc_i2c;
}
if (i2c && seeprom_bootstrap_read(i2c, 0x50, 0x00, 4096,
eth_addr, ETHER_ADDR_LEN) == 0) {
prop_data_t pd = prop_data_create_data_nocopy(
eth_addr, ETHER_ADDR_LEN);
KASSERT(pd != NULL);
if (prop_dictionary_set(device_properties(dev),
"mac-addr", pd) == FALSE) {
printf("WARNING: unable to set mac-addr property "
"for %s\n", dev->dv_xname);
}
} else {
printf("%s: WARNING: unable to read MAC address from SEEPROM\n",
dev->dv_xname);
}
}
}