u-boot/board/amcc/taishan/showinfo.c
Wolfgang Denk 54841ab50c Make sure that argv[] argument pointers are not modified.
The hush shell dynamically allocates (and re-allocates) memory for the
argument strings in the "char *argv[]" argument vector passed to
commands.  Any code that modifies these pointers will cause serious
corruption of the malloc data structures and crash U-Boot, so make
sure the compiler can check that no such modifications are being done
by changing the code into "char * const argv[]".

This modification is the result of debugging a strange crash caused
after adding a new command, which used the following argument
processing code which has been working perfectly fine in all Unix
systems since version 6 - but not so in U-Boot:

int main (int argc, char **argv)
{
	while (--argc > 0 && **++argv == '-') {
/* ====> */	while (*++*argv) {
			switch (**argv) {
			case 'd':
				debug++;
				break;
			...
			default:
				usage ();
			}
		}
	}
	...
}

The line marked "====>" will corrupt the malloc data structures and
usually cause U-Boot to crash when the next command gets executed by
the shell.  With the modification, the compiler will prevent this with
an
	error: increment of read-only location '*argv'

N.B.: The code above can be trivially rewritten like this:

	while (--argc > 0 && **++argv == '-') {
		char *arg = *argv;
		while (*++arg) {
			switch (*arg) {
			...

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2010-07-04 23:55:42 +02:00

236 lines
7.4 KiB
C

/*
* (C) Copyright 2007
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#include <common.h>
#include <command.h>
#include <asm/processor.h>
#include <pci.h>
void show_reset_reg(void)
{
unsigned long reg;
/* read clock regsiter */
printf("===== Display reset and initialize register Start =========\n");
mfcpr(CPR0_PLLC,reg);
printf("cpr_pllc = %#010lx\n",reg);
mfcpr(CPR0_PLLD,reg);
printf("cpr_plld = %#010lx\n",reg);
mfcpr(CPR0_PRIMAD0,reg);
printf("cpr_primad = %#010lx\n",reg);
mfcpr(CPR0_PRIMBD0,reg);
printf("cpr_primbd = %#010lx\n",reg);
mfcpr(CPR0_OPBD0,reg);
printf("cpr_opbd = %#010lx\n",reg);
mfcpr(CPR0_PERD,reg);
printf("cpr_perd = %#010lx\n",reg);
mfcpr(CPR0_MALD,reg);
printf("cpr_mald = %#010lx\n",reg);
/* read sdr register */
mfsdr(SDR0_EBC,reg);
printf("SDR0_EBC = %#010lx\n",reg);
mfsdr(SDR0_CP440,reg);
printf("SDR0_CP440 = %#010lx\n",reg);
mfsdr(SDR0_XCR,reg);
printf("SDR0_XCR = %#010lx\n",reg);
mfsdr(SDR0_XPLLC,reg);
printf("SDR0_XPLLC = %#010lx\n",reg);
mfsdr(SDR0_XPLLD,reg);
printf("SDR0_XPLLD = %#010lx\n",reg);
mfsdr(SDR0_PFC0,reg);
printf("SDR0_PFC0 = %#010lx\n",reg);
mfsdr(SDR0_PFC1,reg);
printf("SDR0_PFC1 = %#010lx\n",reg);
mfsdr(SDR0_CUST0,reg);
printf("SDR0_CUST0 = %#010lx\n",reg);
mfsdr(SDR0_CUST1,reg);
printf("SDR0_CUST1 = %#010lx\n",reg);
mfsdr(SDR0_UART0,reg);
printf("SDR0_UART0 = %#010lx\n",reg);
mfsdr(SDR0_UART1,reg);
printf("SDR0_UART1 = %#010lx\n",reg);
printf("===== Display reset and initialize register End =========\n");
}
void show_xbridge_info(void)
{
unsigned long reg;
printf("PCI-X chip control registers\n");
mfsdr(SDR0_XCR, reg);
printf("SDR0_XCR = %#010lx\n", reg);
mfsdr(SDR0_XPLLC, reg);
printf("SDR0_XPLLC = %#010lx\n", reg);
mfsdr(SDR0_XPLLD, reg);
printf("SDR0_XPLLD = %#010lx\n", reg);
printf("PCI-X Bridge Configure registers\n");
printf("PCIL0_VENDID = %#06x\n", in16r(PCIL0_VENDID));
printf("PCIL0_DEVID = %#06x\n", in16r(PCIL0_DEVID));
printf("PCIL0_CMD = %#06x\n", in16r(PCIL0_CMD));
printf("PCIL0_STATUS = %#06x\n", in16r(PCIL0_STATUS));
printf("PCIL0_REVID = %#04x\n", in8(PCIL0_REVID));
printf("PCIL0_CACHELS = %#04x\n", in8(PCIL0_CACHELS));
printf("PCIL0_LATTIM = %#04x\n", in8(PCIL0_LATTIM));
printf("PCIL0_HDTYPE = %#04x\n", in8(PCIL0_HDTYPE));
printf("PCIL0_BIST = %#04x\n", in8(PCIL0_BIST));
printf("PCIL0_BAR0 = %#010lx\n", in32r(PCIL0_BAR0));
printf("PCIL0_BAR1 = %#010lx\n", in32r(PCIL0_BAR1));
printf("PCIL0_BAR2 = %#010lx\n", in32r(PCIL0_BAR2));
printf("PCIL0_BAR3 = %#010lx\n", in32r(PCIL0_BAR3));
printf("PCIL0_BAR4 = %#010lx\n", in32r(PCIL0_BAR4));
printf("PCIL0_BAR5 = %#010lx\n", in32r(PCIL0_BAR5));
printf("PCIL0_CISPTR = %#010lx\n", in32r(PCIL0_CISPTR));
printf("PCIL0_SBSSYSVID = %#010x\n", in16r(PCIL0_SBSYSVID));
printf("PCIL0_SBSSYSID = %#010x\n", in16r(PCIL0_SBSYSID));
printf("PCIL0_EROMBA = %#010lx\n", in32r(PCIL0_EROMBA));
printf("PCIL0_CAP = %#04x\n", in8(PCIL0_CAP));
printf("PCIL0_INTLN = %#04x\n", in8(PCIL0_INTLN));
printf("PCIL0_INTPN = %#04x\n", in8(PCIL0_INTPN));
printf("PCIL0_MINGNT = %#04x\n", in8(PCIL0_MINGNT));
printf("PCIL0_MAXLTNCY = %#04x\n", in8(PCIL0_MAXLTNCY));
printf("PCIL0_BRDGOPT1 = %#010lx\n", in32r(PCIL0_BRDGOPT1));
printf("PCIL0_BRDGOPT2 = %#010lx\n", in32r(PCIL0_BRDGOPT2));
printf("PCIL0_POM0LAL = %#010lx\n", in32r(PCIL0_POM0LAL));
printf("PCIL0_POM0LAH = %#010lx\n", in32r(PCIL0_POM0LAH));
printf("PCIL0_POM0SA = %#010lx\n", in32r(PCIL0_POM0SA));
printf("PCIL0_POM0PCILAL = %#010lx\n", in32r(PCIL0_POM0PCIAL));
printf("PCIL0_POM0PCILAH = %#010lx\n", in32r(PCIL0_POM0PCIAH));
printf("PCIL0_POM1LAL = %#010lx\n", in32r(PCIL0_POM1LAL));
printf("PCIL0_POM1LAH = %#010lx\n", in32r(PCIL0_POM1LAH));
printf("PCIL0_POM1SA = %#010lx\n", in32r(PCIL0_POM1SA));
printf("PCIL0_POM1PCILAL = %#010lx\n", in32r(PCIL0_POM1PCIAL));
printf("PCIL0_POM1PCILAH = %#010lx\n", in32r(PCIL0_POM1PCIAH));
printf("PCIL0_POM2SA = %#010lx\n", in32r(PCIL0_POM2SA));
printf("PCIL0_PIM0SA = %#010lx\n", in32r(PCIL0_PIM0SA));
printf("PCIL0_PIM0LAL = %#010lx\n", in32r(PCIL0_PIM0LAL));
printf("PCIL0_PIM0LAH = %#010lx\n", in32r(PCIL0_PIM0LAH));
printf("PCIL0_PIM1SA = %#010lx\n", in32r(PCIL0_PIM1SA));
printf("PCIL0_PIM1LAL = %#010lx\n", in32r(PCIL0_PIM1LAL));
printf("PCIL0_PIM1LAH = %#010lx\n", in32r(PCIL0_PIM1LAH));
printf("PCIL0_PIM2SA = %#010lx\n", in32r(PCIL0_PIM1SA));
printf("PCIL0_PIM2LAL = %#010lx\n", in32r(PCIL0_PIM1LAL));
printf("PCIL0_PIM2LAH = %#010lx\n", in32r(PCIL0_PIM1LAH));
printf("PCIL0_XSTS = %#010lx\n", in32r(PCIL0_STS));
}
int do_show_xbridge_info(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
show_xbridge_info();
return 0;
}
U_BOOT_CMD(xbriinfo, 1, 1, do_show_xbridge_info,
"Show PCIX bridge info", "");
#define TAISHAN_PCI_DEV_ID0 0x800
#define TAISHAN_PCI_DEV_ID1 0x1000
void show_pcix_device_info(void)
{
int ii;
int dev;
u8 capp;
u8 xcapid;
u16 status;
u16 xcommand;
u32 xstatus;
for (ii = 0; ii < 2; ii++) {
if (ii == 0)
dev = TAISHAN_PCI_DEV_ID0;
else
dev = TAISHAN_PCI_DEV_ID1;
pci_read_config_word(dev, PCI_STATUS, &status);
if (status & PCI_STATUS_CAP_LIST) {
pci_read_config_byte(dev, PCI_CAPABILITY_LIST, &capp);
pci_read_config_byte(dev, (int)(capp), &xcapid);
if (xcapid == 0x07) {
pci_read_config_word(dev, (int)(capp + 2),
&xcommand);
pci_read_config_dword(dev, (int)(capp + 4),
&xstatus);
printf("BUS0 dev%d Xcommand=%#06x,Xstatus=%#010x\n",
(ii + 1), xcommand, xstatus);
} else {
printf("BUS0 dev%d PCI-X CAP ID error,"
"CAP=%#04x,XCAPID=%#04x\n",
(ii + 1), capp, xcapid);
}
} else {
printf("BUS0 dev%d not found PCI_STATUS_CAP_LIST supporting\n",
ii + 1);
}
}
}
int do_show_pcix_device_info(cmd_tbl_t * cmdtp, int flag, int argc,
char * const argv[])
{
show_pcix_device_info();
return 0;
}
U_BOOT_CMD(xdevinfo, 1, 1, do_show_pcix_device_info,
"Show PCIX Device info", "");
extern void show_reset_reg(void);
int do_show_reset_reg_info(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
show_reset_reg();
return 0;
}
U_BOOT_CMD(resetinfo, 1, 1, do_show_reset_reg_info,
"Show Reset REG info", "");