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|
/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* Copyright (C) 2006 Semihalf, Piotr Kruszynski <ppk@semihalf.com>
* Copyright (C) 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com>
* 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 <sys/param.h>
#include <sys/reboot.h>
#include <sys/linker.h>
#include <machine/elf.h>
#include <machine/metadata.h>
#include <machine/bootinfo.h>
#include "api_public.h"
#include "bootstrap.h"
#include "glue.h"
#if defined(LOADER_FDT_SUPPORT)
extern int fdt_fixup(void);
#endif
/*
* 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 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.
*/
static 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
*/
#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, sizeof(u_long));\
}
#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), sizeof(u_long)); \
}
#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, sizeof(u_long)); \
}
#define MOD_END(a, c) { \
COPY32(MODINFO_END, a, c); \
COPY32(0, a, c); \
}
static vm_offset_t
md_copymodules(vm_offset_t addr)
{
struct preloaded_file *fp;
struct file_metadata *md;
int c;
vm_offset_t a;
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 be first */
MOD_TYPE(addr, fp->f_type, c);
if (fp->f_args)
MOD_ARGS(addr, fp->f_args, c);
a = fp->f_addr - __elfN(relocation_offset);
MOD_ADDR(addr, a, 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);
}
#if !defined(LOADER_FDT_SUPPORT)
/*
* Prepare the bootinfo structure. Put a ptr to the allocated struct in addr,
* return size.
*/
static int
md_bootinfo(struct bootinfo **addr)
{
#define TMP_MAX_ETH 8
#define TMP_MAX_MR 8
struct bootinfo *bi;
struct bi_mem_region tmp_mr[TMP_MAX_MR];
struct bi_eth_addr tmp_eth[TMP_MAX_ETH];
struct sys_info *si;
char *str, *end;
const char *env;
void *ptr;
u_int8_t tmp_addr[6];
int i, n, mr_no, eth_no, size;
if ((si = ub_get_sys_info()) == NULL)
panic("can't retrieve U-Boot sysinfo");
/*
* Handle mem regions (we only care about DRAM)
*/
for (i = 0, mr_no = 0; i < si->mr_no; i++) {
if (si->mr[i].flags == MR_ATTR_DRAM) {
if (mr_no >= TMP_MAX_MR) {
printf("too many memory regions: %d\n", mr_no);
break;
}
tmp_mr[mr_no].mem_base = si->mr[i].start;
tmp_mr[mr_no].mem_size = si->mr[i].size;
mr_no++;
continue;
}
}
if (mr_no == 0)
panic("can't retrieve RAM info");
size = (mr_no * sizeof(struct bi_mem_region) - sizeof(bi->bi_data));
/*
* Handle Ethernet addresses: parse u-boot env for eth%daddr
*/
env = NULL;
eth_no = 0;
while ((env = ub_env_enum(env)) != NULL) {
if (strncmp(env, "eth", 3) == 0 &&
strncmp(env + (strlen(env) - 4), "addr", 4) == 0) {
/* Extract interface number */
i = strtol(env + 3, &end, 10);
if (end == (env + 3))
/* 'ethaddr' means interface 0 address */
n = 0;
else
n = i;
if (n >= TMP_MAX_MR) {
printf("Ethernet interface number too high: %d. "
"Skipping...\n");
continue;
}
str = ub_env_get(env);
for (i = 0; i < 6; i++) {
tmp_addr[i] = str ? strtol(str, &end, 16) : 0;
if (str)
str = (*end) ? end + 1 : end;
tmp_eth[n].mac_addr[i] = tmp_addr[i];
}
/* eth_no is 1-based number of all interfaces defined */
if (n + 1 > eth_no)
eth_no = n + 1;
}
}
size += (eth_no * sizeof(struct bi_eth_addr)) + sizeof(struct bootinfo);
/*
* Once its whole size is calculated, allocate space for the bootinfo
* and copy over the contents from temp containers.
*/
if ((bi = malloc(size)) == NULL)
panic("can't allocate mem for bootinfo");
ptr = (struct bi_mem_region *)bi->bi_data;
bcopy(tmp_mr, ptr, mr_no * sizeof(struct bi_mem_region));
ptr += mr_no * sizeof(struct bi_mem_region);
bcopy(tmp_eth, ptr, eth_no * sizeof(struct bi_eth_addr));
bi->bi_mem_reg_no = mr_no;
bi->bi_eth_addr_no = eth_no;
bi->bi_version = BI_VERSION;
bi->bi_bar_base = si->bar;
bi->bi_cpu_clk = si->clk_cpu;
bi->bi_bus_clk = si->clk_bus;
*addr = bi;
return (size);
}
#endif
/*
* Load the information expected by a 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(char *args, vm_offset_t *modulep)
{
struct preloaded_file *kfp, *bfp;
struct preloaded_file *xp;
struct file_metadata *md;
struct bootinfo *bip;
vm_offset_t kernend;
vm_offset_t addr;
vm_offset_t envp;
vm_offset_t size;
vm_offset_t vaddr;
vm_offset_t dtbp;
char *rootdevname;
int howto;
int bisize;
int i;
/*
* These metadata addreses must be converted for kernel after
* relocation.
*/
uint32_t mdt[] = {
MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND,
MODINFOMD_ENVP,
#if defined(LOADER_FDT_SUPPORT)
MODINFOMD_DTBP
#endif
};
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);
#if !defined(LOADER_FDT_SUPPORT)
/* prepare bootinfo */
bisize = md_bootinfo(&bip);
#endif
kernend = 0;
kfp = file_findfile(NULL, "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);
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
#if defined(LOADER_FDT_SUPPORT)
/* Handle device tree blob */
fdt_fixup();
if ((bfp = file_findfile(NULL, "dtb")) == NULL &&
(howto & RB_VERBOSE))
printf("**WARNING** Booting with no DTB loaded!\n");
dtbp = bfp == NULL ? 0 : bfp->f_addr;
file_addmetadata(kfp, MODINFOMD_DTBP, sizeof dtbp, &dtbp);
#else
file_addmetadata(kfp, MODINFOMD_BOOTINFO, bisize, bip);
#endif
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
/* Figure out the size and location of the metadata */
*modulep = addr;
size = md_copymodules(0);
kernend = roundup(addr + size, PAGE_SIZE);
/* Provide MODINFOMD_KERNEND */
md = file_findmetadata(kfp, MODINFOMD_KERNEND);
bcopy(&kernend, md->md_data, sizeof kernend);
/* Convert addresses to the final VA */
*modulep -= __elfN(relocation_offset);
for (i = 0; i < sizeof mdt / sizeof mdt[0]; i++) {
md = file_findmetadata(kfp, mdt[i]);
if (md) {
bcopy(md->md_data, &vaddr, sizeof vaddr);
vaddr -= __elfN(relocation_offset);
bcopy(&vaddr, md->md_data, sizeof vaddr);
}
}
/* Only now copy actual modules and metadata */
(void)md_copymodules(addr);
return (0);
}
|