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>
48 #include "bootstrap.h"
51 #if defined(__amd64__)
52 #include <machine/specialreg.h>
56 #include "loader_efi.h"
60 #if defined(LOADER_FDT_SUPPORT)
61 #include <fdt_platform.h>
64 #ifdef LOADER_GELI_SUPPORT
68 int bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp,
71 void bi_loadsmap(struct preloaded_file *kfp);
75 bi_getboothowto(char *kargs)
86 howto = boot_parse_cmdline(kargs);
87 howto |= boot_env_to_howto();
89 console = getenv("console");
90 if (console != NULL) {
91 if (strcmp(console, "comconsole") == 0)
93 if (strcmp(console, "nullconsole") == 0)
96 #if defined(__i386__) || defined(__amd64__)
97 if (strcmp(console, "efi") == 0 &&
98 getenv("efi_8250_uid") != NULL &&
99 getenv("hw.uart.console") == NULL) {
101 * If we found a 8250 com port and com speed, we need to
102 * tell the kernel where the serial port is, and how
103 * fast. Ideally, we'd get the port from ACPI, but that
104 * isn't running in the loader. Do the next best thing
105 * by allowing it to be set by a loader.conf variable,
106 * either a EFI specific one, or the compatible
107 * comconsole_port if not. PCI support is needed, but
108 * for that we'd ideally refactor the
109 * libi386/comconsole.c code to have identical behavior.
110 * We only try to set the port for cases where we saw
111 * the Serial(x) node when parsing, otherwise
112 * specialized hardware that has Uart nodes will have a
114 * But if someone specifically setup hw.uart.console,
115 * don't override that.
119 tmp = getenv("efi_com_speed");
121 speed = strtol(tmp, NULL, 0);
122 tmp = getenv("efi_com_port");
124 tmp = getenv("comconsole_port");
126 port = strtol(tmp, NULL, 0);
127 if (speed != -1 && port != -1) {
128 snprintf(buf, sizeof(buf), "io:%d,br:%d", port,
130 env_setenv("hw.uart.console", EV_VOLATILE, buf,
143 efi_do_vmap(EFI_MEMORY_DESCRIPTOR *mm, UINTN sz, UINTN mmsz, UINT32 mmver)
145 EFI_MEMORY_DESCRIPTOR *desc, *viter, *vmap;
147 int curr, ndesc, nset;
154 /* This isn't really an EFI error case, but pretend it is */
155 return (EFI_OUT_OF_RESOURCES);
157 for (curr = 0; curr < ndesc;
158 curr++, desc = NextMemoryDescriptor(desc, mmsz)) {
159 if ((desc->Attribute & EFI_MEMORY_RUNTIME) != 0) {
161 desc->VirtualStart = desc->PhysicalStart;
163 viter = NextMemoryDescriptor(viter, mmsz);
166 ret = RS->SetVirtualAddressMap(nset * mmsz, mmsz, mmver, vmap);
172 bi_load_efi_data(struct preloaded_file *kfp, bool exit_bs)
174 EFI_MEMORY_DESCRIPTOR *mm;
175 EFI_PHYSICAL_ADDRESS addr = 0;
177 const char *efi_novmap;
180 UINTN dsz, pages, retry, sz;
182 struct efi_map_header *efihdr;
185 #if defined(__amd64__) || defined(__aarch64__)
188 efifb.fb_addr = gfx_state.tg_fb.fb_addr;
189 efifb.fb_size = gfx_state.tg_fb.fb_size;
190 efifb.fb_height = gfx_state.tg_fb.fb_height;
191 efifb.fb_width = gfx_state.tg_fb.fb_width;
192 efifb.fb_stride = gfx_state.tg_fb.fb_stride;
193 efifb.fb_mask_red = gfx_state.tg_fb.fb_mask_red;
194 efifb.fb_mask_green = gfx_state.tg_fb.fb_mask_green;
195 efifb.fb_mask_blue = gfx_state.tg_fb.fb_mask_blue;
196 efifb.fb_mask_reserved = gfx_state.tg_fb.fb_mask_reserved;
198 printf("EFI framebuffer information:\n");
199 printf("addr, size 0x%jx, 0x%jx\n", efifb.fb_addr, efifb.fb_size);
200 printf("dimensions %d x %d\n", efifb.fb_width, efifb.fb_height);
201 printf("stride %d\n", efifb.fb_stride);
202 printf("masks 0x%08x, 0x%08x, 0x%08x, 0x%08x\n",
203 efifb.fb_mask_red, efifb.fb_mask_green, efifb.fb_mask_blue,
204 efifb.fb_mask_reserved);
206 if (efifb.fb_addr != 0)
207 file_addmetadata(kfp, MODINFOMD_EFI_FB, sizeof(efifb), &efifb);
211 efi_novmap = getenv("efi_disable_vmap");
212 if (efi_novmap != NULL)
213 do_vmap = strcasecmp(efi_novmap, "YES") != 0;
215 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
218 * Assign size of EFI_MEMORY_DESCRIPTOR to keep compatible with
219 * u-boot which doesn't fill this value when buffer for memory
220 * descriptors is too small (eg. 0 to obtain memory map size)
222 dsz = sizeof(EFI_MEMORY_DESCRIPTOR);
225 * Allocate enough pages to hold the bootinfo block and the
226 * memory map EFI will return to us. The memory map has an
227 * unknown size, so we have to determine that first. Note that
228 * the AllocatePages call can itself modify the memory map, so
229 * we have to take that into account as well. The changes to
230 * the memory map are caused by splitting a range of free
231 * memory into two, so that one is marked as being loader
239 * Matthew Garrett has observed at least one system changing the
240 * memory map when calling ExitBootServices, causing it to return an
241 * error, probably because callbacks are allocating memory.
242 * So we need to retry calling it at least once.
244 for (retry = 2; retry > 0; retry--) {
246 status = BS->GetMemoryMap(&sz, mm, &efi_mapkey, &dsz, &mmver);
247 if (!EFI_ERROR(status))
250 if (status != EFI_BUFFER_TOO_SMALL) {
251 printf("%s: GetMemoryMap error %lu\n", __func__,
252 EFI_ERROR_CODE(status));
257 BS->FreePages(addr, pages);
259 /* Add 10 descriptors to the size to allow for
260 * fragmentation caused by calling AllocatePages */
262 pages = EFI_SIZE_TO_PAGES(sz + efisz);
263 status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
265 if (EFI_ERROR(status)) {
266 printf("%s: AllocatePages error %lu\n", __func__,
267 EFI_ERROR_CODE(status));
272 * Read the memory map and stash it after bootinfo. Align the
273 * memory map on a 16-byte boundary (the bootinfo block is page
276 efihdr = (struct efi_map_header *)(uintptr_t)addr;
277 mm = (void *)((uint8_t *)efihdr + efisz);
278 sz = (EFI_PAGE_SIZE * pages) - efisz;
283 status = efi_exit_boot_services(efi_mapkey);
284 if (!EFI_ERROR(status))
289 BS->FreePages(addr, pages);
290 printf("ExitBootServices error %lu\n", EFI_ERROR_CODE(status));
295 * This may be disabled by setting efi_disable_vmap in
296 * loader.conf(5). By default we will setup the virtual
301 efi_do_vmap(mm, sz, dsz, mmver);
302 efihdr->memory_size = sz;
303 efihdr->descriptor_size = dsz;
304 efihdr->descriptor_version = mmver;
305 file_addmetadata(kfp, MODINFOMD_EFI_MAP, efisz + sz,
313 * Load the information expected by an amd64 kernel.
315 * - The 'boothowto' argument is constructed.
316 * - The 'bootdev' argument is constructed.
317 * - The 'bootinfo' struct is constructed, and copied into the kernel space.
318 * - The kernel environment is copied into kernel space.
319 * - Module metadata are formatted and placed in kernel space.
322 bi_load(char *args, vm_offset_t *modulep, vm_offset_t *kernendp, bool exit_bs)
324 struct preloaded_file *xp, *kfp;
325 struct devdesc *rootdev;
326 struct file_metadata *md;
328 uint64_t kernend, module;
333 bool is64 = sizeof(long) == 8;
334 #if defined(LOADER_FDT_SUPPORT)
342 * These metadata addreses must be converted for kernel after
346 MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND,
347 MODINFOMD_ENVP, MODINFOMD_FONT,
348 #if defined(LOADER_FDT_SUPPORT)
354 howto = bi_getboothowto(args);
357 * Allow the environment variable 'rootdev' to override the supplied
358 * device. This should perhaps go to MI code and/or have $rootdev
359 * tested/set by MI code before launching the kernel.
361 rootdevname = getenv("rootdev");
362 archsw.arch_getdev((void**)(&rootdev), rootdevname, NULL);
363 if (rootdev == NULL) {
364 printf("Can't determine root device.\n");
369 /* Try reading the /etc/fstab file to select the root device */
370 getrootmount(devformat(rootdev));
374 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
375 if (addr < xp->f_addr + xp->f_size)
376 addr = xp->f_addr + xp->f_size;
379 /* Pad to a page boundary. */
380 addr = roundup(addr, PAGE_SIZE);
382 addr = build_font_module(addr);
384 /* Pad to a page boundary. */
385 addr = roundup(addr, PAGE_SIZE);
387 /* Copy our environment. */
389 addr = md_copyenv(addr);
391 /* Pad to a page boundary. */
392 addr = roundup(addr, PAGE_SIZE);
394 #if defined(LOADER_FDT_SUPPORT)
395 /* Handle device tree blob */
397 dtb_size = fdt_copy(addr);
399 /* Pad to a page boundary */
401 addr += roundup(dtb_size, PAGE_SIZE);
404 kfp = file_findfile(NULL, "elf kernel");
406 kfp = file_findfile(NULL, "elf64 kernel");
408 panic("can't find kernel file");
409 kernend = 0; /* fill it in later */
411 /* Figure out the size and location of the metadata. */
412 module = *modulep = addr;
414 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof(howto), &howto);
415 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof(envp), &envp);
416 #if defined(LOADER_FDT_SUPPORT)
418 file_addmetadata(kfp, MODINFOMD_DTBP, sizeof(dtbp), &dtbp);
420 printf("WARNING! Trying to fire up the kernel, but no "
421 "device tree blob found!\n");
423 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof(kernend), &kernend);
424 #ifdef MODINFOMD_MODULEP
425 file_addmetadata(kfp, MODINFOMD_MODULEP, sizeof(module), &module);
428 file_addmetadata(kfp, MODINFOMD_FW_HANDLE, sizeof(ST), &ST);
430 #ifdef LOADER_GELI_SUPPORT
431 geli_export_key_metadata(kfp);
434 bi_load_efi_data(kfp, exit_bs);
439 size = md_copymodules(0, is64); /* Find the size of the modules */
440 kernend = roundup(addr + size, PAGE_SIZE);
443 /* patch MODINFOMD_KERNEND */
444 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
445 bcopy(&kernend, md->md_data, sizeof kernend);
448 *modulep -= __elfN(relocation_offset);
450 /* Do relocation fixup on metadata of each module. */
451 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
452 for (i = 0; i < nitems(mdt); i++) {
453 md = file_findmetadata(xp, mdt[i]);
455 bcopy(md->md_data, &vaddr, sizeof vaddr);
456 vaddr -= __elfN(relocation_offset);
457 bcopy(&vaddr, md->md_data, sizeof vaddr);
463 /* Copy module list and metadata. */
464 (void)md_copymodules(addr, is64);