mmnet_machdep.c revision 1.5 
1/*	$Id: mmnet_machdep.c,v 1.5 2020/04/18 10:55:45 skrll Exp $	*/
2/*	$NetBSD: mmnet_machdep.c,v 1.5 2020/04/18 10:55:45 skrll Exp $	*/
3
4/*
5 * Copyright (c) 2007 Embedtronics Oy
6 * Based on tsarm_machdep.c
7 *
8 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
9 * All rights reserved.
10 *
11 * Based on code written by Jason R. Thorpe and Steve C. Woodford for
12 * Wasabi Systems, Inc.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 *    notice, this list of conditions and the following disclaimer in the
21 *    documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 *    must display the following acknowledgement:
24 *	This product includes software developed for the NetBSD Project by
25 *	Wasabi Systems, Inc.
26 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
27 *    or promote products derived from this software without specific prior
28 *    written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
33 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43/*
44 * Copyright (c) 1997,1998 Mark Brinicombe.
45 * Copyright (c) 1997,1998 Causality Limited.
46 * All rights reserved.
47 *
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
50 * are met:
51 * 1. Redistributions of source code must retain the above copyright
52 *    notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 *    notice, this list of conditions and the following disclaimer in the
55 *    documentation and/or other materials provided with the distribution.
56 * 3. All advertising materials mentioning features or use of this software
57 *    must display the following acknowledgement:
58 *	This product includes software developed by Mark Brinicombe
59 *	for the NetBSD Project.
60 * 4. The name of the company nor the name of the author may be used to
61 *    endorse or promote products derived from this software without specific
62 *    prior written permission.
63 *
64 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
65 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
66 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
67 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
68 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
69 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
70 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
74 * SUCH DAMAGE.
75 *
76 * Machine dependant functions for kernel setup for Iyonix.
77 */
78/* Adaptation for Propox MMnet by Aymeric Vincent is in the public domain */
79
80#include <sys/cdefs.h>
81__KERNEL_RCSID(0, "$NetBSD: mmnet_machdep.c,v 1.5 2020/04/18 10:55:45 skrll Exp $");
82
83#include "opt_ddb.h"
84#include "opt_kgdb.h"
85#include "opt_pmap_debug.h"
86
87#include <sys/param.h>
88#include <sys/bus.h>
89#include <sys/device.h>
90#include <sys/systm.h>
91#include <sys/kernel.h>
92#include <sys/exec.h>
93#include <sys/proc.h>
94#include <sys/msgbuf.h>
95#include <sys/reboot.h>
96#include <sys/termios.h>
97#include <sys/ksyms.h>
98
99#include <uvm/uvm_extern.h>
100
101#include <dev/cons.h>
102
103#include <machine/db_machdep.h>
104#include <ddb/db_sym.h>
105#include <ddb/db_extern.h>
106
107#define	DRAM_BLOCKS	1
108#include <machine/bootconfig.h>
109#include <machine/cpu.h>
110#include <machine/frame.h>
111#include <arm/undefined.h>
112
113#include <arm/arm32/machdep.h>
114
115#include <arm/at91/at91reg.h>
116#include <arm/at91/at91var.h>
117
118#include <dev/ic/comreg.h>
119#include <dev/ic/comvar.h>
120
121#include <machine/autoconf.h>
122
123#include "isa.h"
124
125#include <arm/at91/at91sam9260reg.h>
126#include <arm/at91/at91sam9260busvar.h>
127
128#include "ksyms.h"
129
130#include <arm/at91/at91busvar.h>
131#include <arm/at91/at91pdcreg.h>
132#include <arm/at91/at91dbgureg.h>
133#include <arm/at91/at91reg.h>
134#include <arm/at91/at91streg.h>
135
136/* boot configuration: */
137BootConfig bootconfig;		/* Boot config storage */
138char *boot_args = NULL;
139char *boot_file = NULL;
140
141/* hmmm */
142static struct arm32_dma_range mmnet_dma_ranges[4];
143static struct at91bus_machdep mmnetbus;
144static at91bus_tag_t old_at91bus_tag;
145
146/* Prototypes */
147static void mmnet_device_register(device_t dev, void *aux);
148static void mmnetbus_init(struct at91bus_clocks *);
149static void mmnetbus_peripheral_clock(int pid, int enable);
150static uint32_t mmnetbus_gpio_mask(int pid);
151
152
153/*
154 * void cpu_reboot(int howto, char *bootstr)
155 *
156 * Reboots the system
157 *
158 * Deal with any syncing, unmounting, dumping and shutdown hooks,
159 * then reset the CPU.
160 */
161void
162cpu_reboot(int howto, char *bootstr)
163{
164
165	/*
166	 * If we are still cold then hit the air brakes
167	 * and crash to earth fast
168	 */
169	if (cold) {
170		doshutdownhooks();
171		pmf_system_shutdown(boothowto);
172		printf("\r\n");
173		printf("The operating system has halted.\r\n");
174		printf("Please press any key to reboot.\r\n");
175		cngetc();
176		printf("\r\nrebooting...\r\n");
177		goto reset;
178	}
179
180	/* Disable console buffering */
181
182	/*
183	 * If RB_NOSYNC was not specified sync the discs.
184	 * Note: Unless cold is set to 1 here, syslogd will die during the
185	 * unmount.  It looks like syslogd is getting woken up only to find
186	 * that it cannot page part of the binary in as the filesystem has
187	 * been unmounted.
188	 */
189	if (!(howto & RB_NOSYNC))
190		bootsync();
191
192	/* Say NO to interrupts */
193	splhigh();
194
195	/* Do a dump if requested. */
196	if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
197		dumpsys();
198
199	/* Run any shutdown hooks */
200	doshutdownhooks();
201
202	pmf_system_shutdown(boothowto);
203
204	/* Make sure IRQ's are disabled */
205	IRQdisable;
206
207	if (howto & RB_HALT) {
208		printf("\r\n");
209		printf("The operating system has halted.\r\n");
210		printf("Please press any key to reboot.\r\n");
211		cngetc();
212	}
213
214	printf("\r\nrebooting...\r\n");
215 reset:
216	/*
217	 * Make really really sure that all interrupts are disabled,
218	 * and poke the Internal Bus and Peripheral Bus reset lines.
219	 */
220	(void) disable_interrupts(I32_bit|F32_bit);
221	STREG(ST_WDMR)	= ST_WDMR_EXTEN | ST_WDMR_RSTEN | 1;
222	STREG(ST_CR)	= ST_CR_WDRST;
223	for (;;);
224}
225
226/*
227 * vaddr_t initarm(...)
228 *
229 * Initial entry point on startup. This gets called before main() is
230 * entered.
231 * It should be responsible for setting up everything that must be
232 * in place when main is called.
233 * This includes
234 *   Taking a copy of the boot configuration structure.
235 *   Initialising the physical console so characters can be printed.
236 *   Setting up page tables for the kernel
237 *   Initialising interrupt controllers to a sane default state
238 */
239vaddr_t
240initarm(void *arg)
241{
242	vaddr_t sp;
243	/*
244	 * basic AT91 initialization:
245	 */
246	if (at91bus_init())
247		panic("%s: at91bus_init() failed", __FUNCTION__);
248
249	if (AT91_CHIP_ID() == AT91SAM9260_CHIP_ID) {
250		memcpy(&mmnetbus, at91bus_tag, sizeof(mmnetbus));
251		mmnetbus.init = mmnetbus_init;
252		mmnetbus.peripheral_clock = mmnetbus_peripheral_clock;
253		mmnetbus.gpio_mask = mmnetbus_gpio_mask;
254		old_at91bus_tag = at91bus_tag;
255		at91bus_tag = &mmnetbus;
256	}
257
258 	/* Fake bootconfig structure for the benefit of pmap.c */
259 	/* XXX must make the memory description h/w independent */
260 	bootconfig.dramblocks = 1;
261 	bootconfig.dram[0].address = 0x20000000UL;
262 	bootconfig.dram[0].pages =   0x04000000UL / PAGE_SIZE;
263	sp = at91bus_setup(&bootconfig);
264
265	if (AT91_CHIP_ID() != AT91SAM9260_CHIP_ID)
266		panic("%s: processor is not AT91SAM9260", __FUNCTION__);
267
268	/* we've a specific device_register routine */
269	evbarm_device_register = mmnet_device_register;
270
271	/* We return the new stack pointer address */
272	return sp;
273}
274
275
276bus_dma_tag_t
277at91_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template)
278{
279	int i;
280	struct arm32_bus_dma_tag *dmat;
281
282	for (i = 0; i < bootconfig.dramblocks; i++) {
283		mmnet_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address;
284		mmnet_dma_ranges[i].dr_busbase = bootconfig.dram[i].address;
285		mmnet_dma_ranges[i].dr_len = bootconfig.dram[i].pages *
286			PAGE_SIZE;
287	}
288
289	dmat = dma_tag_template;
290
291	dmat->_ranges = mmnet_dma_ranges;
292	dmat->_nranges = bootconfig.dramblocks;
293
294	return dmat;
295}
296
297void mmnetbus_init(struct at91bus_clocks *clocks)
298{
299	(*old_at91bus_tag->init)(clocks);
300}
301
302uint32_t mmnetbus_gpio_mask(int pid)
303{
304	switch (pid) {
305	case PID_PIOA:	return ~0x00000300U;
306	case PID_PIOB:	return ~0x0000783FU;
307	case PID_PIOC:	return ~0x00000000U;
308	default:	return ~0x00000000U;
309	}
310}
311
312void mmnetbus_peripheral_clock(int pid, int enable)
313{
314	switch (pid) {
315	case PID_TWI:
316		if (enable) {
317			PIOA_WRITE(PIO_ASR, 0x06000000);
318			PIOA_WRITE(PIO_PDR, 0x06000000);
319			PIOA_WRITE(PIO_MDER, 0x06000000);
320		}
321		break;
322
323	case PID_SPI0:
324		if (enable) {
325			PIOA_WRITE(PIO_ASR, 0x0000000f);
326			PIOA_WRITE(PIO_PDR, 0x0000000f);
327		}
328		break;
329
330	case PID_SPI1:
331		if (enable) {
332			PIOB_WRITE(PIO_ASR, 0x0000000f);
333			PIOB_WRITE(PIO_PDR, 0x0000000f);
334		}
335		break;
336	}
337	(*old_at91bus_tag->peripheral_clock)(pid, enable);
338}
339
340
341static void mmnet_device_register(device_t dev, void *aux)
342{
343#if 0
344	if (device_is_a(dev, "at91semac")) {
345		// propagate mac address from u-boot
346	}
347#endif
348}
349