This is the new unified bootstrap, sometimes known previously as the

'three-stage' bootstrap.
There are a number of caveats with the code in its current state:
 - The i386 bootstrap only supports booting from a floppy.
 - The kernel and kld do not yet know how to deal with the extended
   information and module summary passed in.
 - PnP-based autodetection and demand loading of modules is not implemented.
 - i386 ELF kernel loading is not ready yet.
 - The i386 bootstrap is loaded via an ugly blockmap.

On the alpha, both net- and disk-booting (SRM console machines only) is
supported.  No blockmaps are used by this code.

Obtained from:	Parts from the NetBSD/i386 standalone bootstrap.

1 files changed, 197 insertions, 0 deletions

diff --git a/sys/boot/i386/libi386/bootinfo.c b/sys/boot/i386/libi386/bootinfo.c
new file mode 100644
index 0000000..8554f2a
--- /dev/null
+++ b/sys/boot/i386/libi386/bootinfo.c
@@ -0,0 +1,197 @@
+/*-
+ * 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.
+ *
+ *	$Id$
+ */
+
+#include <sys/reboot.h>
+#include <stand.h>
+#include "bootstrap.h"
+
+
+/*
+ * Return a 'boothowto' value corresponding to the kernel arguments in
+ * (kargs) and any relevant environment variables.
+ */
+static struct 
+{
+    char	*ev;
+    int		mask;
+} howto_names[] = {
+    {"boot_askname",	RB_ASKNAME},
+    {"boot_userconfig",	RB_CONFIG},
+    {"boot_ddb",	RB_KDB},
+    {"boot_gdb",	RB_GDB},
+    {"boot_single",	RB_SINGLE},
+    {"boot_verbose",	RB_VERBOSE},
+    {NULL,	0}
+};
+
+int
+bi_getboothowto(char *kargs)
+{
+    char	*cp;
+    int		howto;
+    int		active;
+    int		i;
+    
+    howto = 0;
+    if (kargs  != NULL) {
+	cp = kargs;
+	active = 0;
+	while (*cp != 0) {
+	    if (!active && (*cp == '-')) {
+		active = 1;
+	    } else if (active)
+		switch (*cp) {
+		case 'a':
+		    howto |= RB_ASKNAME;
+		    break;
+		case 'c':
+		    howto |= RB_CONFIG;
+		    break;
+		case 'd':
+		    howto |= RB_KDB;
+		    break;
+		case 'g':
+		    howto |= RB_GDB;
+		    break;
+		case 'h':
+		    howto |= RB_SERIAL;
+		    break;
+		case 'r':
+		    howto |= RB_DFLTROOT;
+		    break;
+		case 's':
+		    howto |= RB_SINGLE;
+		    break;
+		case 'v':
+		    howto |= RB_VERBOSE;
+		    break;
+		default:
+		    active = 0;
+		    break;
+		}
+	}
+	cp++;
+    }
+    for (i = 0; howto_names[i].ev != NULL; i++)
+	if (getenv(howto_names[i].ev) != NULL)
+	    howto |= howto_names[i].mask;
+    if (!strcmp(getenv("console"), "comconsole"))
+	howto |= RB_SERIAL;
+    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.
+ */
+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) {
+	vpbcopy(ep->ev_name, addr, strlen(ep->ev_name));
+	addr += strlen(ep->ev_name);
+	vpbcopy("=", addr, 1);
+	addr++;
+	if (ep->ev_value != NULL) {
+	    vpbcopy(ep->ev_value, addr, strlen(ep->ev_value));
+	    addr += strlen(ep->ev_value);
+	}
+	vpbcopy("", addr, 1);
+	addr++;
+    }
+    vpbcopy("", addr, 1);
+    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 preceeded by a 16-bit identifier and a 16-bit size field.
+ *
+ * Currently, the following data are saved:
+ *
+ * MOD_NAME	(variable)		module name (string)
+ * MOD_TYPE	(variable)		module type (string)
+ * MOD_ADDR	sizeof(vm_offset_t)	module load address
+ * MOD_SIZE	sizeof(size_t)		module size
+ * MOD_METADATA	(variable)		type-specific metadata
+ */
+#define MOD_STR(t, a, s) {				\
+    u_int32_t ident = (t << 16) + strlen(s) + 1;	\
+    vpbcopy(&ident, a, sizeof(ident));			\
+    a += sizeof(ident);					\
+    vpbcopy(s, a, strlen(s) + 1);			\
+    a += strlen(s) + 1;					\
+}
+
+#define MOD_NAME(a, s)	MOD_STR(MODINFO_NAME, a, s)
+#define MOD_TYPE(a, s)	MOD_STR(MODINFO_TYPE, a, s)
+
+#define MOD_VAR(t, a, s) {			\
+    u_int32_t ident = (t << 16) + sizeof(s);	\
+    vpbcopy(&ident, a, sizeof(ident));		\
+    a += sizeof(ident);				\
+    vpbcopy(&s, a, sizeof(s));			\
+    a += sizeof(s);				\
+}
+
+#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) {							\
+    u_int32_t ident = ((MODINFO_METADATA | mm->md_type) << 16) + mm->md_size;	\
+    vpbcopy(&ident, a, sizeof(ident));						\
+    a += sizeof(ident);								\
+    vpbcopy(mm->md_data, a, mm->md_size);					\
+    a += mm->md_size;								\
+}
+
+vm_offset_t
+bi_copymodules(vm_offset_t addr)
+{
+    struct loaded_module	*mp;
+    struct module_metadata	*md;
+
+    /* start with the first module on the list, should be the kernel */
+    for (mp = mod_findmodule(NULL, NULL); mp != NULL; mp = mp->m_next) {
+	
+	MOD_NAME(addr, mp->m_name);
+	MOD_TYPE(addr, mp->m_type);
+	MOD_ADDR(addr, mp->m_addr);
+	MOD_SIZE(addr, mp->m_size);
+	for (md = mp->m_metadata; md != NULL; md = md->md_next)
+	    MOD_METADATA(addr, md);
+    }
+    return(addr);
+}