2 * Copyright (C) 2010-2014 Nathan Whitehorn
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
30 #include <sys/endian.h>
31 #include <sys/param.h>
32 #include <fdt_platform.h>
35 #include <machine/cpufunc.h>
36 #include "bootstrap.h"
37 #include "host_syscall.h"
40 struct arch_switch archsw;
43 int kboot_getdev(void **vdev, const char *devspec, const char **path);
44 ssize_t kboot_copyin(const void *src, vm_offset_t dest, const size_t len);
45 ssize_t kboot_copyout(vm_offset_t src, void *dest, const size_t len);
46 ssize_t kboot_readin(const int fd, vm_offset_t dest, const size_t len);
47 int kboot_autoload(void);
48 uint64_t kboot_loadaddr(u_int type, void *data, uint64_t addr);
49 int kboot_setcurrdev(struct env_var *ev, int flags, const void *value);
50 static void kboot_kseg_get(int *nseg, void **ptr);
52 extern int command_fdt_internal(int argc, char *argv[]);
60 kboot_get_phys_load_segment(void)
64 static uint64_t load_segment = ~(0UL);
67 struct region_desc rsvd_reg[32];
72 if (load_segment == ~(0UL)) {
74 /* Default load address is 0x00000000 */
77 /* Read reserved regions */
78 fd = host_open("/proc/device-tree/reserved-ranges", O_RDONLY, 0);
80 while (host_read(fd, &entry[0], sizeof(entry)) == sizeof(entry)) {
81 rsvd_reg[rsvd_reg_cnt].start = be64toh(entry[0]);
82 rsvd_reg[rsvd_reg_cnt].end =
83 be64toh(entry[1]) + rsvd_reg[rsvd_reg_cnt].start - 1;
88 /* Read where the kernel ends */
89 fd = host_open("/proc/device-tree/chosen/linux,kernel-end", O_RDONLY, 0);
91 ret = host_read(fd, &val_64, sizeof(val_64));
93 if (ret == sizeof(uint64_t)) {
94 rsvd_reg[rsvd_reg_cnt].start = 0;
95 rsvd_reg[rsvd_reg_cnt].end = be64toh(val_64) - 1;
97 memcpy(&val_32, &val_64, sizeof(val_32));
98 rsvd_reg[rsvd_reg_cnt].start = 0;
99 rsvd_reg[rsvd_reg_cnt].end = be32toh(val_32) - 1;
105 /* Read memory size (SOCKET0 only) */
106 fd = host_open("/proc/device-tree/memory@0/reg", O_RDONLY, 0);
108 fd = host_open("/proc/device-tree/memory/reg", O_RDONLY, 0);
110 ret = host_read(fd, &entry, sizeof(entry));
112 /* Memory range in start:length format */
113 entry[0] = be64toh(entry[0]);
114 entry[1] = be64toh(entry[1]);
116 /* Reserve everything what is before start */
118 rsvd_reg[rsvd_reg_cnt].start = 0;
119 rsvd_reg[rsvd_reg_cnt].end = entry[0] - 1;
122 /* Reserve everything what is after end */
123 if (entry[1] != 0xffffffffffffffffUL) {
124 rsvd_reg[rsvd_reg_cnt].start = entry[0] + entry[1];
125 rsvd_reg[rsvd_reg_cnt].end = 0xffffffffffffffffUL;
132 /* Sort entries in ascending order (bubble) */
133 for (a = rsvd_reg_cnt - 1; a > 0; a--) {
134 for (b = 0; b < a; b++) {
135 if (rsvd_reg[b].start > rsvd_reg[b + 1].start) {
136 struct region_desc tmp;
138 rsvd_reg[b] = rsvd_reg[b + 1];
139 rsvd_reg[b + 1] = tmp;
144 /* Join overlapping/adjacent regions */
145 for (a = 0; a < rsvd_reg_cnt - 1; ) {
147 if ((rsvd_reg[a + 1].start >= rsvd_reg[a].start) &&
148 ((rsvd_reg[a + 1].start - 1) <= rsvd_reg[a].end)) {
149 /* We have overlapping/adjacent regions! */
151 MAX(rsvd_reg[a].end, rsvd_reg[a + a].end);
153 for (b = a + 1; b < rsvd_reg_cnt - 1; b++)
154 rsvd_reg[b] = rsvd_reg[b + 1];
160 /* Find the first free region */
161 if (rsvd_reg_cnt > 0) {
163 end = rsvd_reg[0].start;
164 for (a = 0; a < rsvd_reg_cnt - 1; a++) {
165 if ((start >= rsvd_reg[a].start) &&
166 (start <= rsvd_reg[a].end)) {
167 start = rsvd_reg[a].end + 1;
168 end = rsvd_reg[a + 1].start;
174 uint64_t align = 64UL*1024UL*1024UL;
176 /* Align both to 64MB boundary */
177 start = (start + align - 1UL) & ~(align - 1UL);
178 end = ((end + 1UL) & ~(align - 1UL)) - 1UL;
181 load_segment = start;
186 return (load_segment);
190 kboot_get_kernel_machine_bits(void)
192 static uint8_t bits = 0;
193 struct old_utsname utsname;
197 /* Default is 32-bit kernel */
200 /* Try to get system type */
201 memset(&utsname, 0, sizeof(utsname));
202 ret = host_uname(&utsname);
204 if (strcmp(utsname.machine, "ppc64") == 0)
206 else if (strcmp(utsname.machine, "ppc64le") == 0)
215 kboot_getdev(void **vdev, const char *devspec, const char **path)
218 const char *devpath, *filepath;
220 struct devdesc *desc;
222 if (strchr(devspec, ':') != NULL) {
224 filepath = strchr(devspec, ':') + 1;
226 devpath = getenv("currdev");
230 for (i = 0; (dv = devsw[i]) != NULL; i++) {
231 if (strncmp(dv->dv_name, devpath, strlen(dv->dv_name)) == 0)
237 if (path != NULL && filepath != NULL)
239 else if (path != NULL)
240 *path = strchr(devspec, ':') + 1;
243 desc = malloc(sizeof(*desc));
246 desc->d_opendata = strdup(devpath);
254 main(int argc, const char **argv)
257 const size_t heapsize = 15*1024*1024;
261 * Set the heap to one page after the end of the loader.
263 heapbase = host_getmem(heapsize);
264 setheap(heapbase, heapbase + heapsize);
271 /* Choose bootdev if provided */
277 printf("Boot device: %s\n", bootdev);
279 archsw.arch_getdev = kboot_getdev;
280 archsw.arch_copyin = kboot_copyin;
281 archsw.arch_copyout = kboot_copyout;
282 archsw.arch_readin = kboot_readin;
283 archsw.arch_autoload = kboot_autoload;
284 archsw.arch_loadaddr = kboot_loadaddr;
285 archsw.arch_kexec_kseg_get = kboot_kseg_get;
287 printf("\n%s", bootprog_info);
289 setenv("currdev", bootdev, 1);
290 setenv("loaddev", bootdev, 1);
291 setenv("LINES", "24", 1);
292 setenv("usefdt", "1", 1);
294 interact(); /* doesn't return */
302 while (1); /* XXX: host_exit */
309 struct host_timeval tvi, tv;
311 host_gettimeofday(&tvi, NULL);
312 ti = tvi.tv_sec*1000000 + tvi.tv_usec;
314 host_gettimeofday(&tv, NULL);
315 t = tv.tv_sec*1000000 + tv.tv_usec;
316 } while (t < ti + usecs);
322 struct host_timeval tv;
323 host_gettimeofday(&tv, NULL);
339 struct kexec_segment {
346 struct kexec_segment loaded_segments[128];
347 int nkexec_segments = 0;
350 get_phys_buffer(vm_offset_t dest, const size_t len, void **buf)
353 const size_t segsize = 4*1024*1024;
355 for (i = 0; i < nkexec_segments; i++) {
356 if (dest >= (vm_offset_t)loaded_segments[i].mem &&
357 dest < (vm_offset_t)loaded_segments[i].mem +
358 loaded_segments[i].memsz)
362 loaded_segments[nkexec_segments].buf = host_getmem(segsize);
363 loaded_segments[nkexec_segments].bufsz = segsize;
364 loaded_segments[nkexec_segments].mem = (void *)rounddown2(dest,segsize);
365 loaded_segments[nkexec_segments].memsz = segsize;
371 *buf = loaded_segments[i].buf + (dest -
372 (vm_offset_t)loaded_segments[i].mem);
373 return (min(len,loaded_segments[i].bufsz - (dest -
374 (vm_offset_t)loaded_segments[i].mem)));
378 kboot_copyin(const void *src, vm_offset_t dest, const size_t len)
380 ssize_t segsize, remainder;
385 segsize = get_phys_buffer(dest, remainder, &destbuf);
386 bcopy(src, destbuf, segsize);
387 remainder -= segsize;
390 } while (remainder > 0);
396 kboot_copyout(vm_offset_t src, void *dest, const size_t len)
398 ssize_t segsize, remainder;
403 segsize = get_phys_buffer(src, remainder, &srcbuf);
404 bcopy(srcbuf, dest, segsize);
405 remainder -= segsize;
408 } while (remainder > 0);
414 kboot_readin(const int fd, vm_offset_t dest, const size_t len)
417 size_t resid, chunk, get;
423 chunk = min(PAGE_SIZE, len);
426 printf("kboot_readin: buf malloc failed\n");
430 for (resid = len; resid > 0; resid -= got, p += got) {
431 get = min(chunk, resid);
432 got = read(fd, buf, get);
435 printf("kboot_readin: read failed\n");
439 kboot_copyin(buf, p, got);
443 return (len - resid);
454 kboot_loadaddr(u_int type, void *data, uint64_t addr)
457 if (type == LOAD_ELF)
458 addr = roundup(addr, PAGE_SIZE);
460 addr += kboot_get_phys_load_segment();
466 kboot_kseg_get(int *nseg, void **ptr)
471 for (a = 0; a < nkexec_segments; a++) {
472 printf("kseg_get: %jx %jx %jx %jx\n",
473 (uintmax_t)loaded_segments[a].buf,
474 (uintmax_t)loaded_segments[a].bufsz,
475 (uintmax_t)loaded_segments[a].mem,
476 (uintmax_t)loaded_segments[a].memsz);
480 *nseg = nkexec_segments;
481 *ptr = &loaded_segments[0];
485 _start(int argc, const char **argv, char **env)
487 // This makes error "variable 'sp' is uninitialized" be just a warning on clang.
488 // Initializing 'sp' is not desired here as it would overwrite "r1" original value
489 #if defined(__clang__)
490 #pragma clang diagnostic push
491 #pragma clang diagnostic warning "-Wuninitialized"
493 register volatile void **sp asm("r1");
494 main((int)sp[0], (const char **)&sp[1]);
495 #if defined(__clang__)
496 #pragma clang diagnostic pop
502 * Since proper fdt command handling function is defined in fdt_loader_cmd.c,
503 * and declaring it as extern is in contradiction with COMMAND_SET() macro
504 * (which uses static pointer), we're defining wrapper function, which
505 * calls the proper fdt handling routine.
508 command_fdt(int argc, char *argv[])
511 return (command_fdt_internal(argc, argv));
514 COMMAND_SET(fdt, "fdt", "flattened device tree handling", command_fdt);