2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * Copyright (c) 2004, 2006 Marcel Moolenaar
4 * Copyright (c) 2014 The FreeBSD Foundation
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/linker.h>
36 #include <sys/reboot.h>
38 #include <machine/cpufunc.h>
39 #include <machine/elf.h>
40 #include <machine/metadata.h>
41 #include <machine/psl.h>
46 #include "bootstrap.h"
47 #include "loader_efi.h"
49 #if defined(__amd64__)
50 #include <machine/specialreg.h>
55 #if defined(LOADER_FDT_SUPPORT)
56 #include <fdt_platform.h>
59 #ifdef LOADER_GELI_SUPPORT
63 int bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp,
67 bi_getboothowto(char *kargs)
72 int howto, speed, port;
75 howto = boot_parse_cmdline(kargs);
76 howto |= boot_env_to_howto();
78 console = getenv("console");
79 if (console != NULL) {
80 if (strcmp(console, "comconsole") == 0)
82 if (strcmp(console, "nullconsole") == 0)
84 #if defined(__i386__) || defined(__amd64__)
85 if (strcmp(console, "efi") == 0 &&
86 getenv("efi_8250_uid") != NULL &&
87 getenv("hw.uart.console") == NULL) {
89 * If we found a 8250 com port and com speed, we need to
90 * tell the kernel where the serial port is, and how
91 * fast. Ideally, we'd get the port from ACPI, but that
92 * isn't running in the loader. Do the next best thing
93 * by allowing it to be set by a loader.conf variable,
94 * either a EFI specific one, or the compatible
95 * comconsole_port if not. PCI support is needed, but
96 * for that we'd ideally refactor the
97 * libi386/comconsole.c code to have identical behavior.
98 * We only try to set the port for cases where we saw
99 * the Serial(x) node when parsing, otherwise
100 * specialized hardware that has Uart nodes will have a
102 * But if someone specifically setup hw.uart.console,
103 * don't override that.
107 tmp = getenv("efi_com_speed");
109 speed = strtol(tmp, NULL, 0);
110 tmp = getenv("efi_com_port");
112 tmp = getenv("comconsole_port");
114 port = strtol(tmp, NULL, 0);
115 if (speed != -1 && port != -1) {
116 snprintf(buf, sizeof(buf), "io:%d,br:%d", port,
118 env_setenv("hw.uart.console", EV_VOLATILE, buf,
129 * Copy the environment into the load area starting at (addr).
130 * Each variable is formatted as <name>=<value>, with a single nul
131 * separating each variable, and a double nul terminating the environment.
134 bi_copyenv(vm_offset_t start)
137 vm_offset_t addr, last;
142 /* Traverse the environment. */
143 for (ep = environ; ep != NULL; ep = ep->ev_next) {
144 len = strlen(ep->ev_name);
145 if ((size_t)archsw.arch_copyin(ep->ev_name, addr, len) != len)
148 if (archsw.arch_copyin("=", addr, 1) != 1)
151 if (ep->ev_value != NULL) {
152 len = strlen(ep->ev_value);
153 if ((size_t)archsw.arch_copyin(ep->ev_value, addr, len) != len)
157 if (archsw.arch_copyin("", addr, 1) != 1)
162 if (archsw.arch_copyin("", last++, 1) != 1)
168 * Copy module-related data into the load area, where it can be
169 * used as a directory for loaded modules.
171 * Module data is presented in a self-describing format. Each datum
172 * is preceded by a 32-bit identifier and a 32-bit size field.
174 * Currently, the following data are saved:
176 * MOD_NAME (variable) module name (string)
177 * MOD_TYPE (variable) module type (string)
178 * MOD_ARGS (variable) module parameters (string)
179 * MOD_ADDR sizeof(vm_offset_t) module load address
180 * MOD_SIZE sizeof(size_t) module size
181 * MOD_METADATA (variable) type-specific metadata
183 #define COPY32(v, a, c) { \
186 archsw.arch_copyin(&x, a, sizeof(x)); \
190 #define MOD_STR(t, a, s, c) { \
192 COPY32(strlen(s) + 1, a, c); \
194 archsw.arch_copyin(s, a, strlen(s) + 1); \
195 a += roundup(strlen(s) + 1, sizeof(u_long)); \
198 #define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
199 #define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
200 #define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
202 #define MOD_VAR(t, a, s, c) { \
204 COPY32(sizeof(s), a, c); \
206 archsw.arch_copyin(&s, a, sizeof(s)); \
207 a += roundup(sizeof(s), sizeof(u_long)); \
210 #define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
211 #define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
213 #define MOD_METADATA(a, mm, c) { \
214 COPY32(MODINFO_METADATA | mm->md_type, a, c); \
215 COPY32(mm->md_size, a, c); \
217 archsw.arch_copyin(mm->md_data, a, mm->md_size); \
218 a += roundup(mm->md_size, sizeof(u_long)); \
221 #define MOD_END(a, c) { \
222 COPY32(MODINFO_END, a, c); \
227 bi_copymodules(vm_offset_t addr)
229 struct preloaded_file *fp;
230 struct file_metadata *md;
235 /* Start with the first module on the list, should be the kernel. */
236 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
237 MOD_NAME(addr, fp->f_name, c); /* This must come first. */
238 MOD_TYPE(addr, fp->f_type, c);
240 MOD_ARGS(addr, fp->f_args, c);
243 v -= __elfN(relocation_offset);
245 MOD_ADDR(addr, v, c);
247 MOD_SIZE(addr, v, c);
248 for (md = fp->f_metadata; md != NULL; md = md->md_next)
249 if (!(md->md_type & MODINFOMD_NOCOPY))
250 MOD_METADATA(addr, md, c);
257 efi_do_vmap(EFI_MEMORY_DESCRIPTOR *mm, UINTN sz, UINTN mmsz, UINT32 mmver)
259 EFI_MEMORY_DESCRIPTOR *desc, *viter, *vmap;
261 int curr, ndesc, nset;
268 /* This isn't really an EFI error case, but pretend it is */
269 return (EFI_OUT_OF_RESOURCES);
271 for (curr = 0; curr < ndesc;
272 curr++, desc = NextMemoryDescriptor(desc, mmsz)) {
273 if ((desc->Attribute & EFI_MEMORY_RUNTIME) != 0) {
275 desc->VirtualStart = desc->PhysicalStart;
277 viter = NextMemoryDescriptor(viter, mmsz);
280 ret = RS->SetVirtualAddressMap(nset * mmsz, mmsz, mmver, vmap);
286 bi_load_efi_data(struct preloaded_file *kfp, bool exit_bs)
288 EFI_MEMORY_DESCRIPTOR *mm;
289 EFI_PHYSICAL_ADDRESS addr = 0;
291 const char *efi_novmap;
294 UINTN dsz, pages, retry, sz;
296 struct efi_map_header *efihdr;
299 #if defined(__amd64__) || defined(__aarch64__)
302 efifb.fb_addr = gfx_state.tg_fb.fb_addr;
303 efifb.fb_size = gfx_state.tg_fb.fb_size;
304 efifb.fb_height = gfx_state.tg_fb.fb_height;
305 efifb.fb_width = gfx_state.tg_fb.fb_width;
306 efifb.fb_stride = gfx_state.tg_fb.fb_stride;
307 efifb.fb_mask_red = gfx_state.tg_fb.fb_mask_red;
308 efifb.fb_mask_green = gfx_state.tg_fb.fb_mask_green;
309 efifb.fb_mask_blue = gfx_state.tg_fb.fb_mask_blue;
310 efifb.fb_mask_reserved = gfx_state.tg_fb.fb_mask_reserved;
312 printf("EFI framebuffer information:\n");
313 printf("addr, size 0x%jx, 0x%jx\n", efifb.fb_addr, efifb.fb_size);
314 printf("dimensions %d x %d\n", efifb.fb_width, efifb.fb_height);
315 printf("stride %d\n", efifb.fb_stride);
316 printf("masks 0x%08x, 0x%08x, 0x%08x, 0x%08x\n",
317 efifb.fb_mask_red, efifb.fb_mask_green, efifb.fb_mask_blue,
318 efifb.fb_mask_reserved);
320 if (efifb.fb_addr != 0)
321 file_addmetadata(kfp, MODINFOMD_EFI_FB, sizeof(efifb), &efifb);
325 efi_novmap = getenv("efi_disable_vmap");
326 if (efi_novmap != NULL)
327 do_vmap = strcasecmp(efi_novmap, "YES") != 0;
329 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
332 * Assign size of EFI_MEMORY_DESCRIPTOR to keep compatible with
333 * u-boot which doesn't fill this value when buffer for memory
334 * descriptors is too small (eg. 0 to obtain memory map size)
336 dsz = sizeof(EFI_MEMORY_DESCRIPTOR);
339 * Allocate enough pages to hold the bootinfo block and the
340 * memory map EFI will return to us. The memory map has an
341 * unknown size, so we have to determine that first. Note that
342 * the AllocatePages call can itself modify the memory map, so
343 * we have to take that into account as well. The changes to
344 * the memory map are caused by splitting a range of free
345 * memory into two, so that one is marked as being loader
352 * Matthew Garrett has observed at least one system changing the
353 * memory map when calling ExitBootServices, causing it to return an
354 * error, probably because callbacks are allocating memory.
355 * So we need to retry calling it at least once.
357 for (retry = 2; retry > 0; retry--) {
359 status = BS->GetMemoryMap(&sz, mm, &efi_mapkey, &dsz, &mmver);
360 if (!EFI_ERROR(status))
363 if (status != EFI_BUFFER_TOO_SMALL) {
364 printf("%s: GetMemoryMap error %lu\n", __func__,
365 EFI_ERROR_CODE(status));
370 BS->FreePages(addr, pages);
372 /* Add 10 descriptors to the size to allow for
373 * fragmentation caused by calling AllocatePages */
375 pages = EFI_SIZE_TO_PAGES(sz + efisz);
376 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
378 if (EFI_ERROR(status)) {
379 printf("%s: AllocatePages error %lu\n", __func__,
380 EFI_ERROR_CODE(status));
385 * Read the memory map and stash it after bootinfo. Align the
386 * memory map on a 16-byte boundary (the bootinfo block is page
389 efihdr = (struct efi_map_header *)(uintptr_t)addr;
390 mm = (void *)((uint8_t *)efihdr + efisz);
391 sz = (EFI_PAGE_SIZE * pages) - efisz;
396 status = BS->ExitBootServices(IH, efi_mapkey);
397 if (!EFI_ERROR(status)) {
398 boot_services_active = false;
404 BS->FreePages(addr, pages);
405 printf("ExitBootServices error %lu\n", EFI_ERROR_CODE(status));
410 * This may be disabled by setting efi_disable_vmap in
411 * loader.conf(5). By default we will setup the virtual
416 efi_do_vmap(mm, sz, dsz, mmver);
417 efihdr->memory_size = sz;
418 efihdr->descriptor_size = dsz;
419 efihdr->descriptor_version = mmver;
420 file_addmetadata(kfp, MODINFOMD_EFI_MAP, efisz + sz,
427 * Load the information expected by an amd64 kernel.
429 * - The 'boothowto' argument is constructed.
430 * - The 'bootdev' argument is constructed.
431 * - The 'bootinfo' struct is constructed, and copied into the kernel space.
432 * - The kernel environment is copied into kernel space.
433 * - Module metadata are formatted and placed in kernel space.
436 bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp, bool exit_bs)
438 struct preloaded_file *xp, *kfp;
439 struct devdesc *rootdev;
440 struct file_metadata *md;
442 uint64_t kernend, module;
447 #if defined(LOADER_FDT_SUPPORT)
455 * These metadata addreses must be converted for kernel after
459 MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND,
460 MODINFOMD_ENVP, MODINFOMD_FONT,
461 #if defined(LOADER_FDT_SUPPORT)
467 howto = bi_getboothowto(args);
470 * Allow the environment variable 'rootdev' to override the supplied
471 * device. This should perhaps go to MI code and/or have $rootdev
472 * tested/set by MI code before launching the kernel.
474 rootdevname = getenv("rootdev");
475 archsw.arch_getdev((void**)(&rootdev), rootdevname, NULL);
476 if (rootdev == NULL) {
477 printf("Can't determine root device.\n");
481 /* Try reading the /etc/fstab file to select the root device */
482 getrootmount(efi_fmtdev((void *)rootdev));
485 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
486 if (addr < (xp->f_addr + xp->f_size))
487 addr = xp->f_addr + xp->f_size;
490 /* Pad to a page boundary. */
491 addr = roundup(addr, PAGE_SIZE);
493 addr = build_font_module(addr);
495 /* Pad to a page boundary. */
496 addr = roundup(addr, PAGE_SIZE);
498 /* Copy our environment. */
500 addr = bi_copyenv(addr);
502 /* Pad to a page boundary. */
503 addr = roundup(addr, PAGE_SIZE);
505 #if defined(LOADER_FDT_SUPPORT)
506 /* Handle device tree blob */
508 dtb_size = fdt_copy(addr);
510 /* Pad to a page boundary */
512 addr += roundup(dtb_size, PAGE_SIZE);
515 kfp = file_findfile(NULL, "elf kernel");
517 kfp = file_findfile(NULL, "elf64 kernel");
519 panic("can't find kernel file");
520 kernend = 0; /* fill it in later */
522 /* Figure out the size and location of the metadata. */
523 module = *modulep = addr;
525 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof(howto), &howto);
526 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof(envp), &envp);
527 #if defined(LOADER_FDT_SUPPORT)
529 file_addmetadata(kfp, MODINFOMD_DTBP, sizeof(dtbp), &dtbp);
531 printf("WARNING! Trying to fire up the kernel, but no "
532 "device tree blob found!\n");
534 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof(kernend), &kernend);
535 #ifdef MODINFOMD_MODULEP
536 file_addmetadata(kfp, MODINFOMD_MODULEP, sizeof(module), &module);
538 file_addmetadata(kfp, MODINFOMD_FW_HANDLE, sizeof(ST), &ST);
539 #ifdef LOADER_GELI_SUPPORT
540 geli_export_key_metadata(kfp);
542 bi_load_efi_data(kfp, exit_bs);
544 size = bi_copymodules(0);
545 kernend = roundup(addr + size, PAGE_SIZE);
548 /* patch MODINFOMD_KERNEND */
549 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
550 bcopy(&kernend, md->md_data, sizeof kernend);
553 *modulep -= __elfN(relocation_offset);
555 /* Do relocation fixup on metadata of each module. */
556 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
557 for (i = 0; i < nitems(mdt); i++) {
558 md = file_findmetadata(xp, mdt[i]);
560 bcopy(md->md_data, &vaddr, sizeof vaddr);
561 vaddr -= __elfN(relocation_offset);
562 bcopy(&vaddr, md->md_data, sizeof vaddr);
568 /* Copy module list and metadata. */
569 (void)bi_copymodules(addr);