| Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/zlib/@/boot/powerpc/ofw/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/zlib/@/boot/powerpc/ofw/metadata.c |
/*-
* 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.
*
* from: FreeBSD: src/sys/boot/sparc64/loader/metadata.c,v 1.6
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/boot/powerpc/ofw/metadata.c 209920 2010-07-12 00:49:22Z nwhitehorn $");
#include <stand.h>
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/linker.h>
#include <machine/metadata.h>
#include "bootstrap.h"
#include "libofw.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}
};
int
md_getboothowto(char *kargs)
{
char *cp;
int howto;
int active;
int i;
/* Parse kargs */
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_CDROM;
break;
case 'd':
howto |= RB_KDB;
break;
case 'D':
howto |= RB_MULTIPLE;
break;
case 'm':
howto |= RB_MUTE;
break;
case 'g':
howto |= RB_GDB;
break;
case 'h':
howto |= RB_SERIAL;
break;
case 'p':
howto |= RB_PAUSE;
break;
case 'r':
howto |= RB_DFLTROOT;
break;
case 's':
howto |= RB_SINGLE;
break;
case 'v':
howto |= RB_VERBOSE;
break;
default:
active = 0;
break;
}
cp++;
}
}
/* get equivalents from the environment */
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;
if (!strcmp(getenv("console"), "nullconsole"))
howto |= RB_MUTE;
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
md_copyenv(vm_offset_t addr)
{
struct env_var *ep;
/* traverse the environment */
for (ep = environ; ep != NULL; ep = ep->ev_next) {
archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
addr += strlen(ep->ev_name);
archsw.arch_copyin("=", addr, 1);
addr++;
if (ep->ev_value != NULL) {
archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value));
addr += strlen(ep->ev_value);
}
archsw.arch_copyin("", addr, 1);
addr++;
}
archsw.arch_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
*/
static int align;
#define COPY32(v, a, c) { \
u_int32_t x = (v); \
if (c) \
archsw.arch_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) \
archsw.arch_copyin(s, a, strlen(s) + 1);\
a += roundup(strlen(s) + 1, align); \
}
#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) \
archsw.arch_copyin(&s, a, sizeof(s)); \
a += roundup(sizeof(s), align); \
}
#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) \
archsw.arch_copyin(mm->md_data, a, mm->md_size);\
a += roundup(mm->md_size, align); \
}
#define MOD_END(a, c) { \
COPY32(MODINFO_END, a, c); \
COPY32(0, a, c); \
}
vm_offset_t
md_copymodules(vm_offset_t addr, int kern64)
{
struct preloaded_file *fp;
struct file_metadata *md;
uint64_t scratch64;
int c;
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);
if (kern64) {
scratch64 = fp->f_addr;
MOD_ADDR(addr, scratch64, c);
scratch64 = fp->f_size;
MOD_SIZE(addr, scratch64, c);
} else {
MOD_ADDR(addr, fp->f_addr, c);
MOD_SIZE(addr, fp->f_size, 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);
}
/*
* Load the information expected by a powerpc kernel.
*
* - The 'boothowto' argument is constructed
* - The 'bootdev' argument is constructed
* - The kernel environment is copied into kernel space.
* - Module metadata are formatted and placed in kernel space.
*/
int
md_load_dual(char *args, vm_offset_t *modulep, int kern64)
{
struct preloaded_file *kfp;
struct preloaded_file *xp;
struct file_metadata *md;
vm_offset_t kernend;
vm_offset_t addr;
vm_offset_t envp;
vm_offset_t size;
uint64_t scratch64;
char *rootdevname;
int howto;
align = kern64 ? 8 : 4;
howto = md_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");
if (rootdevname == NULL)
rootdevname = getenv("currdev");
/* Try reading the /etc/fstab file to select the root device */
getrootmount(rootdevname);
/* 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 = md_copyenv(addr);
/* pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
kernend = 0;
kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");
if (kfp == NULL)
kfp = file_findfile(NULL, "elf kernel");
if (kfp == NULL)
panic("can't find kernel file");
file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
if (kern64) {
scratch64 = envp;
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof scratch64, &scratch64);
scratch64 = kernend;
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof scratch64, &scratch64);
} else {
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
}
*modulep = addr;
size = md_copymodules(0, kern64);
kernend = roundup(addr + size, PAGE_SIZE);
md = file_findmetadata(kfp, MODINFOMD_KERNEND);
if (kern64) {
scratch64 = kernend;
bcopy(&scratch64, md->md_data, sizeof scratch64);
} else {
bcopy(&kernend, md->md_data, sizeof kernend);
}
(void)md_copymodules(addr, kern64);
return(0);
}
int
md_load(char *args, vm_offset_t *modulep)
{
return (md_load_dual(args, modulep, 0));
}
int
md_load64(char *args, vm_offset_t *modulep)
{
return (md_load_dual(args, modulep, 1));
}