svn commit: r247456 - projects/uefi/sys/boot/amd64/efi
Benno Rice
benno at FreeBSD.org
Thu Feb 28 10:50:10 UTC 2013
Author: benno
Date: Thu Feb 28 10:50:09 2013
New Revision: 247456
URL: http://svnweb.freebsd.org/changeset/base/247456
Log:
Rename bootinfo64.c to bootinfo.c
Added:
projects/uefi/sys/boot/amd64/efi/bootinfo.c
- copied unchanged from r247455, projects/uefi/sys/boot/amd64/efi/bootinfo64.c
Deleted:
projects/uefi/sys/boot/amd64/efi/bootinfo64.c
Modified:
projects/uefi/sys/boot/amd64/efi/Makefile
Modified: projects/uefi/sys/boot/amd64/efi/Makefile
==============================================================================
--- projects/uefi/sys/boot/amd64/efi/Makefile Thu Feb 28 10:48:29 2013 (r247455)
+++ projects/uefi/sys/boot/amd64/efi/Makefile Thu Feb 28 10:50:09 2013 (r247456)
@@ -11,7 +11,7 @@ INTERNALPROG=
# architecture-specific loader code
SRCS= main.c conf.c vers.c reloc.c elf64_freebsd.c
-SRCS+= copy.c bootinfo64.c autoload.c devicename.c efimd.c
+SRCS+= copy.c bootinfo.c autoload.c devicename.c efimd.c
SRCS+= framebuffer.c amd64_tramp.S start.S
CFLAGS+= -fPIC
Copied: projects/uefi/sys/boot/amd64/efi/bootinfo.c (from r247455, projects/uefi/sys/boot/amd64/efi/bootinfo64.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ projects/uefi/sys/boot/amd64/efi/bootinfo.c Thu Feb 28 10:50:09 2013 (r247456, copy of r247455, projects/uefi/sys/boot/amd64/efi/bootinfo64.c)
@@ -0,0 +1,314 @@
+/*-
+ * Copyright (c) 1998 Michael Smith <msmith at freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stand.h>
+#include <string.h>
+#include <sys/param.h>
+#include <sys/reboot.h>
+#include <sys/linker.h>
+#include <machine/cpufunc.h>
+#include <machine/psl.h>
+#include <machine/specialreg.h>
+
+#include <efi.h>
+#include <efilib.h>
+
+#include "bootstrap.h"
+#include "x86_efi.h"
+
+/*
+ * Return a 'boothowto' value corresponding to the kernel arguments in
+ * (kargs) and any relevant environment variables.
+ */
+static struct
+{
+ const char *ev;
+ int mask;
+} howto_names[] = {
+ { "boot_askname", RB_ASKNAME},
+ { "boot_cdrom", RB_CDROM},
+ { "boot_ddb", RB_KDB},
+ { "boot_dfltroot", RB_DFLTROOT},
+ { "boot_gdb", RB_GDB},
+ { "boot_multicons", RB_MULTIPLE},
+ { "boot_mute", RB_MUTE},
+ { "boot_pause", RB_PAUSE},
+ { "boot_serial", RB_SERIAL},
+ { "boot_single", RB_SINGLE},
+ { "boot_verbose", RB_VERBOSE},
+ { NULL, 0}
+};
+
+static const char howto_switches[] = "aCdrgDmphsv";
+static int howto_masks[] = {
+ RB_ASKNAME, RB_CDROM, RB_KDB, RB_DFLTROOT, RB_GDB, RB_MULTIPLE,
+ RB_MUTE, RB_PAUSE, RB_SERIAL, RB_SINGLE, RB_VERBOSE
+};
+
+static int
+bi_getboothowto(char *kargs)
+{
+ const char *sw;
+ char *opts;
+ int howto, i;
+
+ howto = 0;
+
+ /* Get the boot options from the environment first. */
+ for (i = 0; howto_names[i].ev != NULL; i++) {
+ if (getenv(howto_names[i].ev) != NULL)
+ howto |= howto_names[i].mask;
+ }
+
+ /* Parse kargs */
+ if (kargs == NULL)
+ return (howto);
+
+ opts = strchr(kargs, '-');
+ while (opts != NULL) {
+ while (*(++opts) != '\0') {
+ sw = strchr(howto_switches, *opts);
+ if (sw == NULL)
+ break;
+ howto |= howto_masks[sw - howto_switches];
+ }
+ opts = strchr(opts, '-');
+ }
+
+ return (howto);
+}
+
+/*
+ * Copy the environment into the load area starting at (addr).
+ * Each variable is formatted as <name>=<value>, with a single nul
+ * separating each variable, and a double nul terminating the environment.
+ */
+static vm_offset_t
+bi_copyenv(vm_offset_t start)
+{
+ struct env_var *ep;
+ vm_offset_t addr, last;
+ size_t len;
+
+ addr = last = start;
+
+ /* Traverse the environment. */
+ for (ep = environ; ep != NULL; ep = ep->ev_next) {
+ len = strlen(ep->ev_name);
+ if (x86_efi_copyin(ep->ev_name, addr, len) != len)
+ break;
+ addr += len;
+ if (x86_efi_copyin("=", addr, 1) != 1)
+ break;
+ addr++;
+ if (ep->ev_value != NULL) {
+ len = strlen(ep->ev_value);
+ if (x86_efi_copyin(ep->ev_value, addr, len) != len)
+ break;
+ addr += len;
+ }
+ if (x86_efi_copyin("", addr, 1) != 1)
+ break;
+ last = ++addr;
+ }
+
+ if (x86_efi_copyin("", last++, 1) != 1)
+ last = start;
+ return(last);
+}
+
+/*
+ * Copy module-related data into the load area, where it can be
+ * used as a directory for loaded modules.
+ *
+ * Module data is presented in a self-describing format. Each datum
+ * is preceded by a 32-bit identifier and a 32-bit size field.
+ *
+ * Currently, the following data are saved:
+ *
+ * MOD_NAME (variable) module name (string)
+ * MOD_TYPE (variable) module type (string)
+ * MOD_ARGS (variable) module parameters (string)
+ * MOD_ADDR sizeof(vm_offset_t) module load address
+ * MOD_SIZE sizeof(size_t) module size
+ * MOD_METADATA (variable) type-specific metadata
+ */
+#define COPY32(v, a, c) { \
+ u_int32_t x = (v); \
+ if (c) \
+ x86_efi_copyin(&x, a, sizeof(x)); \
+ a += sizeof(x); \
+}
+
+#define MOD_STR(t, a, s, c) { \
+ COPY32(t, a, c); \
+ COPY32(strlen(s) + 1, a, c); \
+ if (c) \
+ x86_efi_copyin(s, a, strlen(s) + 1); \
+ a += roundup(strlen(s) + 1, sizeof(u_int64_t)); \
+}
+
+#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
+#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
+#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
+
+#define MOD_VAR(t, a, s, c) { \
+ COPY32(t, a, c); \
+ COPY32(sizeof(s), a, c); \
+ if (c) \
+ x86_efi_copyin(&s, a, sizeof(s)); \
+ a += roundup(sizeof(s), sizeof(u_int64_t)); \
+}
+
+#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
+#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
+
+#define MOD_METADATA(a, mm, c) { \
+ COPY32(MODINFO_METADATA | mm->md_type, a, c); \
+ COPY32(mm->md_size, a, c); \
+ if (c) \
+ x86_efi_copyin(mm->md_data, a, mm->md_size); \
+ a += roundup(mm->md_size, sizeof(u_int64_t)); \
+}
+
+#define MOD_END(a, c) { \
+ COPY32(MODINFO_END, a, c); \
+ COPY32(0, a, c); \
+}
+
+static vm_offset_t
+bi_copymodules64(vm_offset_t addr)
+{
+ struct preloaded_file *fp;
+ struct file_metadata *md;
+ int c;
+ u_int64_t v;
+
+ c = addr != 0;
+ /* start with the first module on the list, should be the kernel */
+ for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
+ MOD_NAME(addr, fp->f_name, c); /* this field must come first */
+ MOD_TYPE(addr, fp->f_type, c);
+ if (fp->f_args)
+ MOD_ARGS(addr, fp->f_args, c);
+ v = fp->f_addr;
+ MOD_ADDR(addr, v, c);
+ v = fp->f_size;
+ MOD_SIZE(addr, v, c);
+ for (md = fp->f_metadata; md != NULL; md = md->md_next)
+ if (!(md->md_type & MODINFOMD_NOCOPY))
+ MOD_METADATA(addr, md, c);
+ }
+ MOD_END(addr, c);
+ return(addr);
+}
+
+extern int ldr_bootinfo(struct preloaded_file *kfp);
+
+/*
+ * Load the information expected by an amd64 kernel.
+ *
+ * - The 'boothowto' argument is constructed
+ * - The 'bootdev' argument is constructed
+ * - The 'bootinfo' struct is constructed, and copied into the kernel space.
+ * - The kernel environment is copied into kernel space.
+ * - Module metadata are formatted and placed in kernel space.
+ */
+int
+bi_load64(char *args, vm_offset_t *modulep, vm_offset_t *kernendp)
+{
+ struct preloaded_file *xp, *kfp;
+ struct devdesc *rootdev;
+ struct file_metadata *md;
+ vm_offset_t addr;
+ u_int64_t kernend;
+ u_int64_t envp;
+ vm_offset_t size;
+ char *rootdevname;
+ int howto;
+
+ howto = bi_getboothowto(args);
+
+ /*
+ * Allow the environment variable 'rootdev' to override the supplied
+ * device. This should perhaps go to MI code and/or have $rootdev
+ * tested/set by MI code before launching the kernel.
+ */
+ rootdevname = getenv("rootdev");
+ x86_efi_getdev((void **)(&rootdev), rootdevname, NULL);
+ if (rootdev == NULL) { /* bad $rootdev/$currdev */
+ printf("can't determine root device\n");
+ return(EINVAL);
+ }
+
+ /* Try reading the /etc/fstab file to select the root device */
+ getrootmount(x86_efi_fmtdev((void *)rootdev));
+
+ /* find the last module in the chain */
+ addr = 0;
+ for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
+ if (addr < (xp->f_addr + xp->f_size))
+ addr = xp->f_addr + xp->f_size;
+ }
+ /* pad to a page boundary */
+ addr = roundup(addr, PAGE_SIZE);
+
+ /* copy our environment */
+ envp = addr;
+ addr = bi_copyenv(addr);
+
+ /* pad to a page boundary */
+ addr = roundup(addr, PAGE_SIZE);
+
+ kfp = file_findfile(NULL, "elf kernel");
+ if (kfp == NULL)
+ kfp = file_findfile(NULL, "elf64 kernel");
+ if (kfp == NULL)
+ panic("can't find kernel file");
+ kernend = 0; /* fill it in later */
+ file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
+ file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
+ file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
+ ldr_bootinfo(kfp);
+
+ /* Figure out the size and location of the metadata */
+ *modulep = addr;
+ size = bi_copymodules64(0);
+ kernend = roundup(addr + size, PAGE_SIZE);
+ *kernendp = kernend;
+
+ /* patch MODINFOMD_KERNEND */
+ md = file_findmetadata(kfp, MODINFOMD_KERNEND);
+ bcopy(&kernend, md->md_data, sizeof kernend);
+
+ /* copy module list and metadata */
+ (void)bi_copymodules64(addr);
+
+ return(0);
+}
More information about the svn-src-projects
mailing list