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-rw-r--r--sys/boot/ia64/libski/bootinfo.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/sys/boot/ia64/libski/bootinfo.c b/sys/boot/ia64/libski/bootinfo.c
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+++ b/sys/boot/ia64/libski/bootinfo.c
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+/*-
+ * Copyright (c) 1998 Michael Smith <msmith@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.
+ *
+ * $FreeBSD$
+ */
+
+#include <stand.h>
+#include <string.h>
+#include <sys/param.h>
+#include <sys/reboot.h>
+#include <sys/linker.h>
+#include <machine/elf.h>
+#include <machine/bootinfo.h>
+#include "bootstrap.h"
+
+extern char *ski_fmtdev(void *vdev);
+
+/*
+ * 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.
+ */
+vm_offset_t
+bi_copyenv(vm_offset_t addr)
+{
+ struct env_var *ep;
+
+ /* traverse the environment */
+ for (ep = environ; ep != NULL; ep = ep->ev_next) {
+ ski_copyin(ep->ev_name, addr, strlen(ep->ev_name));
+ addr += strlen(ep->ev_name);
+ ski_copyin("=", addr, 1);
+ addr++;
+ if (ep->ev_value != NULL) {
+ ski_copyin(ep->ev_value, addr, strlen(ep->ev_value));
+ addr += strlen(ep->ev_value);
+ }
+ ski_copyin("", addr, 1);
+ addr++;
+ }
+ ski_copyin("", addr, 1);
+ addr++;
+ return(addr);
+}
+
+/*
+ * 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) { \
+ u_int32_t x = (v); \
+ ski_copyin(&x, a, sizeof(x)); \
+ a += sizeof(x); \
+}
+
+#define MOD_STR(t, a, s) { \
+ COPY32(t, a); \
+ COPY32(strlen(s) + 1, a); \
+ ski_copyin(s, a, strlen(s) + 1); \
+ a += roundup(strlen(s) + 1, sizeof(u_int64_t));\
+}
+
+#define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
+#define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
+#define MOD_ARGS(a, s) MOD_STR(MODINFO_ARGS, a, s)
+
+#define MOD_VAR(t, a, s) { \
+ COPY32(t, a); \
+ COPY32(sizeof(s), a); \
+ ski_copyin(&s, a, sizeof(s)); \
+ a += roundup(sizeof(s), sizeof(u_int64_t)); \
+}
+
+#define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
+#define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
+
+#define MOD_METADATA(a, mm) { \
+ COPY32(MODINFO_METADATA | mm->md_type, a); \
+ COPY32(mm->md_size, a); \
+ ski_copyin(mm->md_data, a, mm->md_size); \
+ a += roundup(mm->md_size, sizeof(u_int64_t));\
+}
+
+#define MOD_END(a) { \
+ COPY32(MODINFO_END, a); \
+ COPY32(0, a); \
+}
+
+vm_offset_t
+bi_copymodules(vm_offset_t addr)
+{
+ struct preloaded_file *fp;
+ struct file_metadata *md;
+
+ /* 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); /* this field must come first */
+ MOD_TYPE(addr, fp->f_type);
+ if (fp->f_args)
+ MOD_ARGS(addr, fp->f_args);
+ MOD_ADDR(addr, fp->f_addr);
+ MOD_SIZE(addr, fp->f_size);
+ for (md = fp->f_metadata; md != NULL; md = md->md_next)
+ if (!(md->md_type & MODINFOMD_NOCOPY))
+ MOD_METADATA(addr, md);
+ }
+ MOD_END(addr);
+ return(addr);
+}
+
+/*
+ * Load the information expected by an alpha kernel.
+ *
+ * - The kernel environment is copied into kernel space.
+ * - Module metadata are formatted and placed in kernel space.
+ */
+int
+bi_load(struct bootinfo *bi, struct preloaded_file *fp)
+{
+ char *rootdevname;
+ struct ski_devdesc *rootdev;
+ struct preloaded_file *xp;
+ vm_offset_t addr, bootinfo_addr;
+ u_int pad;
+ char *kernelname;
+ vm_offset_t ssym, esym;
+ struct file_metadata *md;
+
+ /*
+ * 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");
+ ski_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(ski_fmtdev((void *)rootdev));
+ free(rootdev);
+
+ ssym = esym = 0;
+ if ((md = file_findmetadata(fp, MODINFOMD_SSYM)) != NULL)
+ ssym = *((vm_offset_t *)&(md->md_data));
+ if ((md = file_findmetadata(fp, MODINFOMD_ESYM)) != NULL)
+ esym = *((vm_offset_t *)&(md->md_data));
+ if (ssym == 0 || esym == 0)
+ ssym = esym = 0; /* sanity */
+
+ bi->bi_symtab = ssym;
+ bi->bi_esymtab = esym;
+
+ /* 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 */
+ pad = (u_int)addr & PAGE_MASK;
+ if (pad != 0) {
+ pad = PAGE_SIZE - pad;
+ addr += pad;
+ }
+
+ /* copy our environment */
+ bi->bi_envp = addr;
+ addr = bi_copyenv(addr);
+
+ /* pad to a page boundary */
+ pad = (u_int)addr & PAGE_MASK;
+ if (pad != 0) {
+ pad = PAGE_SIZE - pad;
+ addr += pad;
+ }
+ /* copy module list and metadata */
+ bi->bi_modulep = addr;
+ addr = bi_copymodules(addr);
+
+ /* all done copying stuff in, save end of loaded object space */
+ bi->bi_kernend = addr;
+
+ kernelname = getenv("kernelname");
+ if (kernelname) {
+ strncpy(bi->bi_kernel, kernelname, sizeof(bi->bi_kernel) - 1);
+ }
+
+ return(0);
+}
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