evbppc: Add support for DHT Walnut 405GP evaluation board.
(Digital Home Technologies PCB 01070201 Rev. 1.1)

Official web page seems gone, but analyses by Linux people are at:

- https://elinux.org/DHT-Walnut
- http://web.archive.org/web/20070225171826/http://supernova.stanford.edu/dingdong/

The board features:

- 266MHz PowerPC 405GP processor
- one PC133 SDRAM slot
- two 32-bit 5V PCI slot
- on-chip ethernet controller with DP83843 PHY
- on-chip serial port / GPIO controller
- on-board PDC20265 IDE controller

Hardware limitations:

- no MAC address assigned
- no RTC present

Known problem:

- atabus(4) channels cannot be attached to pdcide(4) for cold boot

dmesg:

- https://dmesgd.nycbug.org/index.cgi?do=view&id=5997

Have fun!


(rin)

#	$NetBSD: DHT,v 1.1 2021/04/02 07:00:33 rin Exp $
#
#	DHT --- DHT Walnut 405GP Evaluation Board
#		(Digital Home Technologies PCB 01070201 Rev. 1.1)
#

include 	"arch/evbppc/conf/std.dht"

options 	INCLUDE_CONFIG_FILE	# embed config file in kernel binary

#ident 		"DHT-$Revision: 1.1 $"

maxusers	32


#
# Standard system options
#

options 	INSECURE		# disable kernel security levels
options 	NTP			# NTP phase/frequency locked loop
options 	KTRACE			# system call tracing via ktrace(1)

options 	SYSVMSG			# System V message queues
options 	SYSVSEM			# System V semaphores
options 	SYSVSHM			# System V shared memory

options 	MODULAR			# new style module(7) framework
#options 	MODULAR_DEFAULT_AUTOLOAD
#options 	USERCONF		# userconf(4) support
#options	PIPE_SOCKETPAIR		# smaller, but slower pipe(2)
#options 	SYSCTL_INCLUDE_DESCR	# Include sysctl descriptions in kernel

#options 	UVMHIST
#options 	UVMHIST_PRINT


# Alternate buffer queue strategies for better responsiveness under high
# disk I/O load.
#options 	BUFQ_READPRIO
options 	BUFQ_PRIOCSCAN

#
# Diagnostic/debugging support options
#

options 	DIAGNOSTIC		# cheap kernel consistency checks
#options 	DEBUG			# expensive debugging checks/support
options 	DDB			# in-kernel debugger
options 	DDB_HISTORY_SIZE=512	# enable history editing in DDB
#options 	TRAP_PANICWAIT
makeoptions	COPY_SYMTAB=1	# size for embedded symbol table

makeoptions	DEBUG="-g"		# compile full symbol table


#
# Compatibility options
#

include 	"conf/compat_netbsd13.config"
#options 	COMPAT_386BSD_MBRPART	# recognize old partition ID

#
# File systems
#

file-system 	FFS		# UFS
file-system 	EXT2FS		# second extended file system (linux)
file-system 	LFS		# log-structured file system
file-system 	MFS		# memory file system
file-system 	NFS		# Network File System client
file-system 	CD9660		# ISO 9660 + Rock Ridge file system
file-system 	MSDOSFS		# MS-DOS file system
file-system 	FDESC		# /dev/fd
file-system 	KERNFS		# /kern
file-system 	NULLFS		# loopback file system
file-system 	OVERLAY		# overlay file system
file-system	PUFFS		# Userspace file systems (e.g. ntfs-3g & sshfs)
file-system 	PROCFS		# /proc
file-system 	UMAPFS		# NULLFS + uid and gid remapping
file-system 	UNION		# union file system
file-system	PTYFS		# /dev/pts/N support
file-system	TMPFS		# Efficient memory file-system
#file-system	NTFS		# Windows NT file system (experimental)


#
# File system options
#

options 	QUOTA		# legacy UFS quotas
options 	QUOTA2		# new, in-filesystem UFS quotas
options 	FFS_EI			# FFS Endian Independent support
options 	WAPBL		# File system journaling support
options 	NFSSERVER		# Network File System server
#options 	FFS_NO_SNAPSHOT		# No FFS snapshot support
options 	EXT2FS_SYSTEM_FLAGS	# makes ext2fs file flags (append and
					# immutable) behave as system flags.
options 	NFS_BOOT_DHCP		# Support DHCP NFS root


#
# Networking options
#

options 	GATEWAY		# packet forwarding
options 	INET		# IP + ICMP + TCP + UDP
options 	INET6		# IPv6
#options 	IPSEC		# IP security
#options 	IPSEC_DEBUG	# debug for IP security
#options 	MROUTING	# IP multicast routing
#options 	PIM		# Protocol Independent Multicast
#options 	NETATALK	# AppleTalk networking protocols
options 	PPP_BSDCOMP	# BSD-Compress compression support for PPP
options 	PPP_DEFLATE	# Deflate compression support for PPP
options 	PPP_FILTER	# Active filter support for PPP (requires bpf)
#options 	TCP_DEBUG	# Record last TCP_NDEBUG packets with SO_DEBUG


#
# Kernel root file system and dump configuration.
#

#config		netbsd	root on ? type ?
config		netbsd	root on wd0a type ffs
#config		netbsd	root on emac0 type nfs


#
# Device configuration
#

plb0 at root				# Processor Local Bus
cpu0	at plb?				# CPU
ecc0	at plb? irq 17			# On-chip ECC controller
pchb0	at plb?				# PCI-Host bridges

# On-chip Peripheral Bus support
opb*	at plb?				# On-chip Peripheral Bus
wdog*	at opb?				# Watchdog timer
com*	at opb? addr ? irq ?		# UARTs
emac0	at opb? addr ? irq ?		# Ethernet Media Access Controller
#options 	EMAC_EVENT_COUNTERS
opbgpio0 at opb? addr ? irq ?		# On-chip GPIO controller
gpio*	at opbgpio?			# GPIO framework
	# GPIO pins 0-8 go to J5 header. Pins 0 and 1 are also connected to
	# Power and Media LEDs, respectively (negative logic).

# PCI bus support
pci*	at pchb?
options 	PCIVERBOSE		# verbose PCI device autoconfig messages
#options 	PCI_CONFIG_DUMP		# verbosely dump PCI config space
options 	PCI_NETBSD_CONFIGURE	# Do not rely on BIOS/whatever
					# to configure PCI devices
#options 	PCI_CONFIGURE_VERBOSE	# Show PCI config information

pdcide* at pci? dev ? function ?	# Promise IDE controllers

# ATA (IDE) bus support
atabus* at ata?
wd*	at atabus? drive ?

# MII/PHY support
nsphyter* at mii? phy ?			# NS83843 PHYs
options 	MIIVERBOSE		# verbose PHY autoconfig messages

#
# Random useful PCI devices known to work.
#

ppb*	at pci? dev ? function ?	# PCI-PCI{,e} bridges
pci*	at ppb?

ahcisata* at pci? dev ? function ?	# AHCI SATA controllers
siisata* at pci? dev ? function ?	# SiI SteelVine controllers

wm*	at pci? dev ? function ?	# Intel 82543/82544 gigabit
igphy*	at mii? phy ?			# Intel IGP01E1000
ukphy*	at mii? phy ?			# generic unknown PHYs

xhci*	at pci?	dev ? function ?	# eXtensible Host Controller
usb*	at xhci?

# USB Hubs
uhub*	at usb?
uhub*	at uhub? port ?

# USB Mass Storage
umass*	at uhub? port ? configuration ? interface ?
scsibus* at umass?
sd*	at scsibus? target ? lun ?	# SCSI disk drives


#
# Pseudo devices
#

pseudo-device	crypto			# /dev/crypto device
pseudo-device	swcrypto		# software crypto implementation

# disk/mass storage pseudo-devices
#pseudo-device	ccd			# concatenated/striped disk devices
#pseudo-device	cgd			# cryptographic disk devices
#pseudo-device	raid			# RAIDframe disk driver
#options 	RAID_AUTOCONFIG		# auto-configuration of RAID components
#pseudo-device	fss			# file system snapshot device
#pseudo-device	md			# memory disk device
pseudo-device	vnd			# disk-like interface to files

# network pseudo-devices
pseudo-device	loop			# network loopback
pseudo-device	bpfilter		# packet filter
pseudo-device 	carp			# Common Address Redundancy Protocol
pseudo-device	npf			# NPF packet filter
pseudo-device	ppp			# Point-to-Point Protocol
pseudo-device	pppoe			# PPP over Ethernet (RFC 2516)
pseudo-device	sl			# Serial Line IP
pseudo-device	irframetty		# IrDA frame line discipline
pseudo-device	tap			# virtual ethernet
pseudo-device	tun			# network tunneling over tty
pseudo-device	gre			# generic L3 over IP tunnel
pseudo-device	gif			# IPv[46] over IPv[46] tunnel (RFC 1933)
#pseudo-device	faith			# IPv[46] TCP relay translation i/f
pseudo-device	stf			# 6to4 IPv6 over IPv4 encapsulation
pseudo-device	vlan			# IEEE 802.1q encapsulation
pseudo-device	bridge			# simple inter-network bridging
pseudo-device	vether			# Virtual Ethernet for bridge
pseudo-device	agr			# IEEE 802.3ad link aggregation

# miscellaneous pseudo-devices
pseudo-device	pty			# pseudo-terminals
pseudo-device	clockctl		# user control of clock subsystem
pseudo-device	ksyms			# /dev/ksyms
pseudo-device	putter			# for puffs and pud

include "dev/veriexec.config"

#	$NetBSD: Makefile.dht.inc,v 1.1 2021/04/02 07:00:33 rin Exp $

CFLAGS+=-mcpu=405
AFLAGS+=-mcpu=405
TEXTADDR?=	100000

SYSTEM_FIRST_OBJ=	locore.o
SYSTEM_FIRST_SFILE=	${THISPPC}/dht/locore.S

#	$NetBSD: files.dht,v 1.1 2021/04/02 07:00:33 rin Exp $
#
# DHT Walnut-specific configuration info

file	arch/evbppc/dht/autoconf.c
file	arch/evbppc/dht/machdep.c
file	arch/powerpc/ibm4xx/ibm4xx_autoconf.c
file	arch/powerpc/ibm4xx/ibm40x_machdep.c
file	arch/powerpc/ibm4xx/ibm4xx_machdep.c

# Memory Disk for install kernel
file	dev/md_root.c				memory_disk_hooks

# Machine-independent ATA drivers
include	"dev/ata/files.ata"

# Machine-independent SCSI drivers
include	"dev/scsipi/files.scsipi"

# Machine-independent USB drivers
include	"dev/usb/files.usb"

#	$NetBSD: std.dht,v 1.1 2021/04/02 07:00:33 rin Exp $
#
# Standard/required options for DHT Walnut 405GP Evaluation Board.

machine	evbppc powerpc
include		"conf/std"	# MI standard options

# standard ("mandatory") kernel options.
options 	PPC_IBM4XX	# IBM 40x family

options 	IBM405_ERRATA77

# Executable support:
options 	EXEC_ELF32	# (native) ELF32 binary support
options 	EXEC_AOUT	# (native) a.out binary support (deprecated)
options 	EXEC_SCRIPT	# shell script support

makeoptions	TEXTADDR=0x100000
makeoptions	BOARDTYPE="dht"
makeoptions	PPCDIR="ibm4xx"
makeoptions	NEED_BINARY="yes"

options 	PPC_INTR_IMPL="<powerpc/intr.h>"
options 	PPC_PCI_MACHDEP_IMPL="<powerpc/pci_machdep.h>"
options 	KERNBASE=0x100000

options 	INTSTK=16384

options 	EVBPPC_HAS_MBR

include		"arch/powerpc/conf/files.ibm4xx"
include		"arch/evbppc/conf/files.dht"

/*	$NetBSD: autoconf.c,v 1.1 2021/04/02 07:00:33 rin Exp $	*/

/*
 * Taken from src/sys/arch/evbppc/walnut/autoconf.c:
 *	NetBSD: autoconf.c,v 1.26 2021/03/30 05:14:00 rin Exp
 */

/*
 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * 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 TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.1 2021/04/02 07:00:33 rin Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>

#include <machine/dht.h>

#include <powerpc/spr.h>
#include <powerpc/ibm4xx/spr.h>

#include <powerpc/ibm4xx/cpu.h>
#include <powerpc/ibm4xx/dcr4xx.h>
#include <powerpc/ibm4xx/dev/plbvar.h>

/*
 * Determine device configuration for a machine.
 */
void
cpu_configure(void)
{

	intr_init();
	calc_delayconst();

	/* Make sure that timers run at CPU frequency */
	mtdcr(DCR_CPC0_CR1, mfdcr(DCR_CPC0_CR1) & ~CPC0_CR1_CETE);

	if (config_rootfound("plb", NULL) == NULL)
		panic("%s: plb not configured", __func__);

	genppc_cpu_configure();
}

void
device_register(device_t dev, void *aux)
{

	ibm4xx_device_register(dev, aux, DHT_COM_FREQ);
}

/*	$NetBSD: locore.S,v 1.1 2021/04/02 07:00:33 rin Exp $	*/

/*
 * Taken from src/sys/arch/powerpc/ibm4xx/openbios/locore.s:
 *	NetBSD: locore.S,v 1.17 2021/03/30 01:57:20 rin Exp
 */

/*
 * Copyright 2001 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Eduardo Horvath and Simon Burge 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) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * 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 TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
 */

#ifdef PPC_4XX_NOCACHE
#error Not tested.
#endif

#include "assym.h"
#include "ksyms.h"

#ifdef _KERNEL_OPT
#include "opt_ddb.h"
#include "opt_modular.h"
#include "opt_ppcparam.h"
#endif

#include <machine/param.h>
#include <machine/asm.h>
#include <machine/psl.h>
#include <machine/trap.h>

#include <powerpc/spr.h>
#include <powerpc/ibm4xx/spr.h>

#include <powerpc/ibm4xx/dcr4xx.h>

/*
 * This symbol is here for the benefit of kvm_mkdb, and is supposed to
 * mark the start of kernel text.
 */
	.text
	.globl	_C_LABEL(kernel_text)
_C_LABEL(kernel_text):

/*
 * Startup entry.  Note, this must be the first thing in the text
 * segment!
 */
	.text
	.globl	__start
__start:
	li	%r0,0
	mtmsr	%r0			/* Disable FPU/MMU/exceptions */
	isync

	/*
	 * Errata 213:  Incorrect data may be flushed from the data cache.
	 * Cores:       PPC405D5X1, PPC405D5X2
	 * Workaround:  #1, CCR0 modification sequence #2
	 * Note:        Meaning of bits we need to set is undocumented.
	 */
	sync
	mfccr0  %r0
	oris    %r0,%r0,0x50000000@h
	mtccr0  %r0
	isync

	/* PPC405GP errata, item #58.
	 * Load string instructions may write incorrect data into the last GPR
	 * targeted in the operation.
	 * Workaround: set OCM0_DSCNTL[DSEN]=0 and OCM0_DSCNTL[DOF]=0 */
	li %r0,0
	mtdcr	DCR_OCM0_DSCNTL, %r0  	/* Disable Data access to OCM */
	mtdcr	DCR_OCM0_ISCNTL, %r0  	/* Disable Instruction access to OCM.
					   Just in case */
#ifdef PPC_4XX_NOCACHE
	/* Disable all caches for physical addresses */
	li	%r0,0
#else
	/* Allow cacheing for only the first 2GB of RAM */
	lis	%r0,0xffff
#endif
	mtdccr	%r0
	mticcr	%r0

	/* Invalidate all TLB entries */
	tlbia
	sync
	isync

	/* Get start of BSS */
	lis	%r3,_C_LABEL(_edata)-4@ha
	addi	%r3,%r3,_C_LABEL(_edata)-4@l
	/* Get end of kernel memory */
	lis	%r8,_C_LABEL(end)@ha
	addi	%r8,%r8,_C_LABEL(end)@l
	/* Zero BSS */
	li	%r4,0
2:	stwu	%r4,4(%r3)
	cmpw	%r3,%r8
	bne+	2b

#if NKSYMS > 0 || defined(DDB) || defined(MODULAR)
	/*
	 * If we had symbol table location we'd store it here and would've
	 * adjusted r8 here.
	 */
	lis	%r7,_C_LABEL(startsym)@ha
	addi	%r7,%r7,_C_LABEL(startsym)@l
	stw	%r8,0(%r7)
	lis	%r7,_C_LABEL(endsym)@ha
	addi	%r7,%r7,_C_LABEL(endsym)@l
	stw	%r8,0(%r7)
#endif

	/* Set kernel MMU context. */
	li	%r0,KERNEL_PID
	mtpid	%r0
	sync

	INIT_CPUINFO(%r8,%r1,%r9,%r0)
	mr	%r4,%r8

	lis	%r3,__start@ha
	addi	%r3,%r3,__start@l

	mr	%r6,%r31		/* info_block address */
	bl	_C_LABEL(initppc)
	bl	_C_LABEL(main)

loop:	b	loop			/* XXX not reached */

#include <powerpc/ibm4xx/4xx_locore.S>

/*	$NetBSD: machdep.c,v 1.1 2021/04/02 07:00:33 rin Exp $	*/

/*
 * Taken from src/sys/arch/evbppc/walnut/machdep.c:
 *	NetBSD: machdep.c,v 1.67 2021/03/30 05:08:16 rin Exp
 */

/*
 * Copyright 2001, 2002 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Eduardo Horvath and Simon Burge 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) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * 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 TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.1 2021/04/02 07:00:33 rin Exp $");

#include "opt_ddb.h"
#include "opt_pci.h"

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/reboot.h>
#include <sys/systm.h>

#include <machine/dht.h>

#include <powerpc/spr.h>
#include <powerpc/ibm4xx/spr.h>

#include <powerpc/ibm4xx/cpu.h>
#include <powerpc/ibm4xx/dcr4xx.h>
#include <powerpc/ibm4xx/ibm405gp.h>
#include <powerpc/ibm4xx/openbios.h>
#include <powerpc/ibm4xx/tlb.h>

#include "com.h"
#if NCOM > 0
#include <sys/termios.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <powerpc/ibm4xx/dev/comopbvar.h>
#ifndef CONADDR
#define	CONADDR		IBM405GP_UART0_BASE
#endif
#ifndef CONSPEED
#define	CONSPEED	B115200
#endif
#ifndef CONMODE
#define	CONMODE		TTYDEF_CFLAG
#endif
#endif /* NCOM > 0 */

#include "emac.h"
#if NEMAC > 0
#include <net/if_ether.h>
#endif

#include "pci.h"
#if NPCI > 0
#ifndef PCI_NETBSD_CONFIGURE
#error options PCI_NETBSD_CONFIGURE is mandatory.
#endif
#include <powerpc/ibm4xx/pci_machdep.h>
#include <dev/pci/pciconf.h>
#include <dev/pci/pcivar.h>
#endif

#define TLB_PG_SIZE 	(16 * 1024 * 1024)

static u_int memsize;

void initppc(vaddr_t, vaddr_t, char *, void *);

/*
 * Get memory size from SDRAM bank register.
 */
static u_int
dht_memsize(void)
{
	u_int total = 0;
	uint32_t val, addr;

	for (addr = DCR_SDRAM0_B0CR; addr <= DCR_SDRAM0_B3CR; addr += 4) {
		mtdcr(DCR_SDRAM0_CFGADDR, addr);
		val = mfdcr(DCR_SDRAM0_CFGDATA);
		if (val & SDRAM0_BnCR_EN)
			total += SDRAM0_BnCR_SZ(val);
	}
	return total;
}

void
consinit(void)
{

#if NCOM > 0
	com_opb_cnattach(DHT_COM_FREQ, CONADDR, CONSPEED, CONMODE);
#endif
}

void
initppc(vaddr_t startkernel, vaddr_t endkernel, char *args, void *info_block)
{

	/* Disable all external interrupts */
	mtdcr(DCR_UIC0_BASE + DCR_UIC_ER, 0);

	memsize = dht_memsize();

	/* Linear map kernel memory */
	for (vaddr_t va = 0; va < endkernel; va += TLB_PG_SIZE)
		ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX);

	/* Map console after physmem (see pmap_tlbmiss()) */
	ppc4xx_tlb_reserve(IBM405GP_UART0_BASE, roundup(memsize, TLB_PG_SIZE),
	    TLB_PG_SIZE, TLB_I | TLB_G);

	/* Disable all timers */
	mtspr(SPR_TCR, 0);

	ibm40x_memsize_init(memsize, startkernel);
	ibm4xx_init(startkernel, endkernel, pic_ext_intr);

#ifdef DDB
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* Look for the ibm4xx modules in the right place */
	module_machine = module_machine_ibm4xx;
}

void
cpu_startup(void)
{
	prop_number_t pn;

	ibm4xx_cpu_startup("DHT Walnut 405GP Evaluation Board");

	/*
	 * Set up the board properties database.
	 */
	board_info_init();

	pn = prop_number_create_integer(DHT_CPU_FREQ);
	KASSERT(pn != NULL);
	if (prop_dictionary_set(board_properties, "processor-frequency", pn) ==
	    false)
		panic("setting processor-frequency");
	prop_object_release(pn);

	pn = prop_number_create_integer(memsize);
	KASSERT(pn != NULL);
	if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
		panic("setting mem-size");
	prop_object_release(pn);

#if NEMAC > 0
	/*
	 * XXX
	 * Unfortunately, no MAC address is assigned to this board.
	 * Set fake address de:ad:be:ef:00:00.
	 *
	 * XXX
	 * This should be same with what U-Boot/PPC-Boot set.
	 */
	static uint8_t enaddr[ETHER_ADDR_LEN];
	enaddr[0] = 0xde; enaddr[1] = 0xad; enaddr[2] = 0xbe;
	enaddr[3] = 0xef; enaddr[4] = 0x00; enaddr[5] = 0x00;
	prop_data_t pd = prop_data_create_data_nocopy(enaddr, ETHER_ADDR_LEN);
	KASSERT(pd != NULL);
	if (prop_dictionary_set(board_properties, "emac0-mac-addr", pd) ==
	    false)
		panic("setting emac0-mac-addr");
	prop_object_release(pd);
#endif

	/*
	 * Now that we have VM, malloc()s are OK in bus_space.
	 */
	bus_space_mallocok();

	/*
	 * No fake mapiodev.
	 */
	fake_mapiodev = 0;
}

#if NPCI > 0
int
ibm4xx_pci_bus_maxdevs(void *v, int busno)
{

	return 32;
}

/*
 * This is only possible mapping known to work b/w PCI devices and IRQ pins.
 */
#define	DEV_TO_IRQ(dev)		(27 + (dev))
#define	PARENT_DEV(swiz, dev)	((swiz) - (dev))

int
ibm4xx_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
	int pin = pa->pa_intrpin, bus = pa->pa_bus, dev = pa->pa_device;

	if (pin <= 0 || pin > 4)
		goto bad;

	if (bus != 0) {
		/*
		 * XXX
		 * We only support ppb(4) directly attached to pci0.
		 */
		dev = PARENT_DEV(pa->pa_intrswiz, dev);
		goto out;
	}

	switch (dev) {
	case 2:
	case 3:
	case 4:
out:
		*ihp = DEV_TO_IRQ(dev);
		return 0;
	default:
bad:
		printf("%s: invalid request: bus %d dev %d pin %d\n",
		    __func__, bus, dev, pin);
		*ihp = -1;
		return 1;
	}
}

void
ibm4xx_pci_conf_interrupt(void *v, int bus, int dev, int pin, int swiz,
    int *iline)
{

	if (bus != 0) {
		/*
		 * XXX
		 * See coment above.
		 */
		dev = PARENT_DEV(swiz, dev);
		goto out;
	}

	switch (dev) {
	case 2:
	case 3:
	case 4:
out:
		*iline = DEV_TO_IRQ(dev);
		break;
	default:
		printf("%s: invalid request: bus %d dev %d pin %d swiz %d\n",
		    __func__, bus, dev, pin, swiz);
		*iline = 0;
		break;
	}
}
#endif /* NPCI > 0 */

/*	$NetBSD: dht.h,v 1.1 2021/04/02 07:00:33 rin Exp $	*/

/*
 * Copyright (c) 2021 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Rin Okuyama.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#ifndef	_EVBPPC_DHT_H_
#define	_EVBPPC_DHT_H_

#include <dev/ic/comreg.h>

#define	DHT_CPU_FREQ	266666666
#define	DHT_COM_FREQ	(6 * COM_FREQ)

#endif	/* _EVBPPC_DHT_H_ */