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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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