freebsd-dev/sys/boot/uboot/common/main.c
Tim Kientzle 5bf877dace Don't call strcmp with a NULL pointer.
In particular, on the AM335x, which comes up with no memory
mapped to low addresses, dereferencing the NULL causes a crash.
2012-05-06 16:01:58 +00:00

306 lines
7.5 KiB
C

/*-
* Copyright (c) 2000 Benno Rice <benno@jeamland.net>
* Copyright (c) 2000 Stephane Potvin <sepotvin@videotron.ca>
* 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 AUTHORS 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 "api_public.h"
#include "bootstrap.h"
#include "glue.h"
#include "libuboot.h"
struct uboot_devdesc currdev;
struct arch_switch archsw; /* MI/MD interface boundary */
int devs_no;
extern char end[];
extern char bootprog_name[];
extern char bootprog_rev[];
extern char bootprog_date[];
extern char bootprog_maker[];
extern unsigned char _etext[];
extern unsigned char _edata[];
extern unsigned char __bss_start[];
extern unsigned char __sbss_start[];
extern unsigned char __sbss_end[];
extern unsigned char _end[];
#ifdef LOADER_FDT_SUPPORT
extern int command_fdt_internal(int argc, char *argv[]);
#endif
static void
dump_sig(struct api_signature *sig)
{
#ifdef DEBUG
printf("signature:\n");
printf(" version\t= %d\n", sig->version);
printf(" checksum\t= 0x%08x\n", sig->checksum);
printf(" sc entry\t= 0x%08x\n", sig->syscall);
#endif
}
static void
dump_addr_info(void)
{
#ifdef DEBUG
printf("\naddresses info:\n");
printf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext);
printf(" _edata = 0x%08x\n", (uint32_t)_edata);
printf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start);
printf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end);
printf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start);
printf(" _end = 0x%08x\n", (uint32_t)_end);
printf(" syscall entry = 0x%08x\n", (uint32_t)syscall_ptr);
#endif
}
static uint64_t
memsize(struct sys_info *si, int flags)
{
uint64_t size;
int i;
size = 0;
for (i = 0; i < si->mr_no; i++)
if (si->mr[i].flags == flags && si->mr[i].size)
size += (si->mr[i].size);
return (size);
}
static void
meminfo(void)
{
uint64_t size;
struct sys_info *si;
int t[3] = { MR_ATTR_DRAM, MR_ATTR_FLASH, MR_ATTR_SRAM };
int i;
if ((si = ub_get_sys_info()) == NULL)
panic("could not retrieve system info");
for (i = 0; i < 3; i++) {
size = memsize(si, t[i]);
if (size > 0)
printf("%s:\t %lldMB\n", ub_mem_type(t[i]),
size / 1024 / 1024);
}
}
static uint64_t
uboot_loadaddr(u_int type, void *data, uint64_t addr)
{
printf("uboot_loadaddr: type=%d data=0x%x addr=0x%x\n",
type, data, addr);
if (type == 1)
return 0x40000000;
return (addr);
}
int
main(void)
{
struct api_signature *sig = NULL;
int i;
struct open_file f;
if (!api_search_sig(&sig))
return (-1);
syscall_ptr = sig->syscall;
if (syscall_ptr == NULL)
return (-2);
if (sig->version > API_SIG_VERSION)
return (-3);
/* Clear BSS sections */
bzero(__sbss_start, __sbss_end - __sbss_start);
bzero(__bss_start, _end - __bss_start);
/*
* Set up console.
*/
cons_probe();
printf("Compatible API signature found @%x\n", (uint32_t)sig);
dump_sig(sig);
dump_addr_info();
/*
* Initialise the heap as early as possible. Once this is done,
* alloc() is usable. The stack is buried inside us, so this is
* safe.
*/
setheap((void *)end, (void *)(end + 512 * 1024));
/*
* Enumerate U-Boot devices
*/
if ((devs_no = ub_dev_enum()) == 0)
panic("no U-Boot devices found");
printf("Number of U-Boot devices: %d\n", devs_no);
printf("\n");
printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
printf("(%s, %s)\n", bootprog_maker, bootprog_date);
meminfo();
/*
* March through the device switch probing for things.
*/
for (i = 0; devsw[i] != NULL; i++) {
if (devsw[i]->dv_init == NULL)
continue;
if ((devsw[i]->dv_init)() != 0)
continue;
printf("\nDevice: %s\n", devsw[i]->dv_name);
currdev.d_dev = devsw[i];
currdev.d_type = currdev.d_dev->dv_type;
currdev.d_unit = 0;
if (strncmp(devsw[i]->dv_name, "disk",
strlen(devsw[i]->dv_name)) == 0) {
f.f_devdata = &currdev;
currdev.d_disk.pnum = 0;
if (devsw[i]->dv_open(&f,&currdev) == 0)
break;
}
if (strncmp(devsw[i]->dv_name, "net",
strlen(devsw[i]->dv_name)) == 0)
break;
}
if (devsw[i] == NULL)
panic("No boot device found!");
env_setenv("currdev", EV_VOLATILE, uboot_fmtdev(&currdev),
uboot_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, uboot_fmtdev(&currdev),
env_noset, env_nounset);
setenv("LINES", "24", 1); /* optional */
setenv("prompt", "loader>", 1);
archsw.arch_getdev = uboot_getdev;
archsw.arch_copyin = uboot_copyin;
archsw.arch_copyout = uboot_copyout;
archsw.arch_readin = uboot_readin;
archsw.arch_autoload = uboot_autoload;
archsw.arch_loadaddr = uboot_loadaddr;
interact(); /* doesn't return */
return (0);
}
COMMAND_SET(heap, "heap", "show heap usage", command_heap);
static int
command_heap(int argc, char *argv[])
{
printf("heap base at %p, top at %p, used %d\n", end, sbrk(0),
sbrk(0) - end);
return (CMD_OK);
}
COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
static int
command_reboot(int argc, char *argv[])
{
printf("Resetting...\n");
ub_reset();
printf("Reset failed!\n");
while(1);
}
COMMAND_SET(devinfo, "devinfo", "show U-Boot devices", command_devinfo);
static int
command_devinfo(int argc, char *argv[])
{
int i;
if ((devs_no = ub_dev_enum()) == 0) {
command_errmsg = "no U-Boot devices found!?";
return (CMD_ERROR);
}
printf("U-Boot devices:\n");
for (i = 0; i < devs_no; i++) {
ub_dump_di(i);
printf("\n");
}
return (CMD_OK);
}
COMMAND_SET(sysinfo, "sysinfo", "show U-Boot system info", command_sysinfo);
static int
command_sysinfo(int argc, char *argv[])
{
struct sys_info *si;
if ((si = ub_get_sys_info()) == NULL) {
command_errmsg = "could not retrieve U-Boot sys info!?";
return (CMD_ERROR);
}
printf("U-Boot system info:\n");
ub_dump_si(si);
return (CMD_OK);
}
#ifdef LOADER_FDT_SUPPORT
/*
* Since proper fdt command handling function is defined in fdt_loader_cmd.c,
* and declaring it as extern is in contradiction with COMMAND_SET() macro
* (which uses static pointer), we're defining wrapper function, which
* calls the proper fdt handling routine.
*/
static int
command_fdt(int argc, char *argv[])
{
return (command_fdt_internal(argc, argv));
}
COMMAND_SET(fdt, "fdt", "flattened device tree handling", command_fdt);
#endif