1/* $NetBSD: machdep.c,v 1.58 2022/01/01 21:07:14 andvar Exp $ */
2
3/*-
4 * Copyright (c) 2011 Reinoud Zandijk <reinoud@netbsd.org>
5 * Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30/*
31 * Note that this machdep.c uses the `dummy' mcontext_t defined for usermode.
32 * This is basically a blob of PAGE_SIZE big. We might want to switch over to
33 * non-generic mcontext_t's one day, but will this break non-NetBSD hosts?
34 */
35
36
37#include "opt_memsize.h"
38
39#include <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.58 2022/01/01 21:07:14 andvar Exp $");
41
42#include <sys/types.h>
43#include <sys/systm.h>
44#include <sys/param.h>
45#include <sys/time.h>
46#include <sys/exec.h>
47#include <sys/buf.h>
48#include <sys/boot_flag.h>
49#include <sys/ucontext.h>
50#include <sys/utsname.h>
51#include <machine/pcb.h>
52#include <machine/psl.h>
53
54#include <uvm/uvm_extern.h>
55#include <uvm/uvm_page.h>
56
57#include <dev/mm.h>
58#include <machine/vmparam.h>
59#include <machine/machdep.h>
60#include <machine/mainbus.h>
61#include <machine/thunk.h>
62#include <machine/cpu.h>
63#include <sys/kgdb.h>
64
65#include "opt_ddb.h"
66#include "opt_kgdb.h"
67
68#ifndef MAX_DISK_IMAGES
69#define MAX_DISK_IMAGES	4
70#endif
71
72#ifndef MAX_VDEVS
73#define MAX_VDEVS 4
74#endif
75
76char machine[_SYS_NMLN] = "";
77char machine_arch[_SYS_NMLN] = "";
78char module_machine_usermode[_SYS_NMLN] = "";
79
80struct vm_map *phys_map = NULL;
81
82static char **saved_argv;
83
84char *usermode_disk_image_path[MAX_DISK_IMAGES];
85int usermode_disk_image_path_count = 0;
86
87int   usermode_vdev_type[MAX_VDEVS];
88char *usermode_vdev_path[MAX_VDEVS];
89int usermode_vdev_count = 0;
90
91static char usermode_tap_devicebuf[PATH_MAX] = "";
92char *usermode_tap_device = NULL;
93char *usermode_tap_eaddr = NULL;
94static char usermode_audio_devicebuf[PATH_MAX] = "";
95char *usermode_audio_device = NULL;
96char *usermode_root_device = NULL;
97int usermode_vnc_width = 0;
98int usermode_vnc_height = 0;
99int usermode_vnc_port = -1;
100
101void	main(int argc, char *argv[]);
102void	usermode_reboot(void);
103
104static void
105usage(const char *pn)
106{
107	thunk_printf("usage: %s [-acdqsvxz]"
108	    " [net=<tapdev>,<eaddr>]"
109	    " [audio=<audiodev>]"
110	    " [disk=<diskimg> ...]"
111	    " [root=<device>]"
112	    " [vnc=<width>x<height>,<port>]"
113	    " [vdev=atapi,device]\n",
114	    pn);
115	thunk_printf("       (ex. \"%s"
116	    " net=tap0,00:00:be:ef:ca:fe"
117	    " audio=audio0"
118	    " disk=root.fs"
119	    " root=ld0"
120	    " vnc=640x480,5900"
121	    " vdev=atapi,/dev/rcd0d\")\n", pn);
122}
123
124
125static int
126vdev_type(const char *type)
127{
128	if (strcasecmp(type, "atapi")==0)
129		return THUNKBUS_TYPE_VATAPI;
130#if 0
131	if (strcasecmp(type, "scsi")==0)
132		return THUNKBUS_TYPE_VSCSI;
133#endif
134	return -1;
135}
136
137
138void
139main(int argc, char *argv[])
140{
141	extern void ttycons_consinit(void);
142	extern void pmap_bootstrap(void);
143	extern void kernmain(void);
144	int type, i, j, r, tmpopt = 0;
145
146	saved_argv = argv;
147
148	/* Get machine and machine_arch from host */
149	thunk_getmachine(machine, sizeof(machine),
150	    machine_arch, sizeof(machine_arch));
151	/* Override module_machine to be ${machine}usermode */
152	snprintf(module_machine_usermode, sizeof(module_machine_usermode),
153	    "%susermode", machine);
154
155	ttycons_consinit();
156
157	for (i = 1; i < argc; i++) {
158		if (argv[i][0] != '-') {
159			if (strncmp(argv[i], "net=", strlen("net=")) == 0) {
160				char *tap = argv[i] + strlen("net=");
161				char *mac = strchr(tap, ',');
162				char *p = usermode_tap_devicebuf;
163				if (mac == NULL) {
164					thunk_printf("bad net= format\n");
165					return;
166				}
167				memset(usermode_tap_devicebuf, 0,
168				    sizeof(usermode_tap_devicebuf));
169				if (*tap != '/') {
170					memcpy(p, "/dev/", strlen("/dev/"));
171					p += strlen("/dev/");
172				}
173				for (; *tap != ','; p++, tap++)
174					*p = *tap;
175				usermode_tap_device = usermode_tap_devicebuf;
176				usermode_tap_eaddr = mac + 1;
177			} else if (strncmp(argv[i], "audio=",
178			    strlen("audio=")) == 0) {
179				char *audio = argv[i] + strlen("audio=");
180				if (*audio != '/')
181					snprintf(usermode_audio_devicebuf,
182					    sizeof(usermode_audio_devicebuf),
183					    "/dev/%s", audio);
184				else
185					snprintf(usermode_audio_devicebuf,
186					    sizeof(usermode_audio_devicebuf),
187					    "%s", audio);
188				usermode_audio_device =
189				    usermode_audio_devicebuf;
190			} else if (strncmp(argv[i], "vnc=",
191			    strlen("vnc=")) == 0) {
192				char *vnc = argv[i] + strlen("vnc=");
193				char *w, *h, *p;
194				w = vnc;
195				h = strchr(w, 'x');
196				if (h == NULL) {
197					thunk_printf("bad vnc= format\n");
198					return;
199				}
200				*h++ = '\0';
201				p = strchr(h, ',');
202				if (p == NULL) {
203					thunk_printf("bad vnc= format\n");
204					return;
205				}
206				*p++ = '\0';
207				usermode_vnc_width = strtoul(w, NULL, 10);
208				usermode_vnc_height = strtoul(h, NULL, 10);
209				usermode_vnc_port = strtoul(p, NULL, 10);
210			} else if (strncmp(argv[i], "disk=",
211			    strlen("disk=")) == 0) {
212				if (usermode_disk_image_path_count ==
213				    MAX_DISK_IMAGES) {
214					thunk_printf("too many disk images "
215					    "(increase MAX_DISK_IMAGES)\n");
216					usage(argv[0]);
217					return;
218				}
219				usermode_disk_image_path[
220				    usermode_disk_image_path_count++] =
221				    argv[i] + strlen("disk=");
222			} else if (strncmp(argv[i], "vdev=",
223			    strlen("vdev=")) == 0) {
224				char *vdev = argv[i] + strlen("vdev=");
225				char *t, *p;
226				if (usermode_disk_image_path_count ==
227				    MAX_VDEVS) {
228					thunk_printf("too many vdevs "
229					    "(increase MAX_VDEVS)\n");
230					usage(argv[0]);
231					return;
232				}
233				t = vdev;
234				p = strchr(t, ',');
235				if (p == NULL) {
236					thunk_printf("bad vdev= format\n");
237					return;
238				}
239				*p++ = '\0';
240				type = vdev_type(t);
241				if (type < 0) {
242					thunk_printf("unknown vdev device type\n");
243					return;
244				}
245				usermode_vdev_type[usermode_vdev_count] = type;
246				usermode_vdev_path[usermode_vdev_count] = p;
247				usermode_vdev_count++;
248			} else if (strncmp(argv[i], "root=",
249			    strlen("root=")) == 0) {
250				usermode_root_device = argv[i] +
251				    strlen("root=");
252			} else {
253				thunk_printf("%s: unknown parameter\n", argv[i]);
254				usage(argv[0]);
255				return;
256			}
257			continue;
258		}
259		for (j = 1; argv[i][j] != '\0'; j++) {
260			r = 0;
261			BOOT_FLAG(argv[i][j], r);
262			if (r == 0) {
263				thunk_printf("unknown kernel boot flag '%c'\n", argv[i][j]);
264				usage(argv[0]);
265				return;
266			}
267			tmpopt |= r;
268		}
269	}
270	boothowto = tmpopt;
271
272	uvm_md_init();
273	uvmexp.ncolors = 2;
274
275	pmap_bootstrap();
276
277	splinit();
278	splraise(IPL_HIGH);
279
280#ifdef DDB
281	if (boothowto & RB_KDB)
282		Debugger();
283#endif
284#ifdef KGDB
285	if (boothowto & RB_KDB) {
286		kgdb_port_init();
287		kgdb_debug_init = 1;
288		kgdb_connect(1);
289	}
290#endif
291
292	kernmain();
293}
294
295void
296usermode_reboot(void)
297{
298	struct thunk_itimerval itimer;
299
300	/* make sure the timer is turned off */
301	memset(&itimer, 0, sizeof(itimer));
302	thunk_setitimer(ITIMER_REAL, &itimer, NULL);
303
304	if (thunk_execv(saved_argv[0], saved_argv) == -1)
305		thunk_abort();
306	/* NOTREACHED */
307}
308
309void
310setstatclockrate(int arg)
311{
312}
313
314void
315consinit(void)
316{
317//	kgdb_connect(0);
318	printf("NetBSD/usermode startup\n");
319}
320
321int
322mm_md_physacc(paddr_t pa, vm_prot_t prot)
323{
324	// printf("%s: pa = %p, acc %d\n", __func__, (void *) pa, prot);
325	if (pa >= physmem * PAGE_SIZE)
326		return EFAULT;
327	return 0;
328}
329
330
331int
332mm_md_kernacc(void *ptr, vm_prot_t prot, bool *handled)
333{
334	const vaddr_t va = (vaddr_t)ptr;
335	extern void *end;
336
337	// printf("%s: ptr %p, acc %d\n", __func__, ptr, prot);
338	if (va < kmem_kvm_start)
339		return EFAULT;
340	if ((va >= kmem_kvm_cur_end) && (va < kmem_k_start))
341		return EFAULT;
342	if (va > (vaddr_t) end)
343		return EFAULT;
344
345	*handled = true;
346	return 0;
347}
348
349