summaryrefslogtreecommitdiff
path: root/util/intelmetool/intelmetool.c
diff options
context:
space:
mode:
Diffstat (limited to 'util/intelmetool/intelmetool.c')
-rw-r--r--util/intelmetool/intelmetool.c202
1 files changed, 94 insertions, 108 deletions
diff --git a/util/intelmetool/intelmetool.c b/util/intelmetool/intelmetool.c
index 2acfec223e..930aa03d0f 100644
--- a/util/intelmetool/intelmetool.c
+++ b/util/intelmetool/intelmetool.c
@@ -24,6 +24,7 @@
#include "me.h"
#include "mmap.h"
#include "intelmetool.h"
+#include "rcba.h"
#define FD2 0x3428
#define ME_COMMAND_DELAY 10000
@@ -32,8 +33,6 @@ extern int fd_mem;
int debug = 0;
static uint32_t fd2 = 0;
-static const int size = 0x4000;
-static volatile uint8_t *rcba;
static void dumpmem(uint8_t *phys, uint32_t size)
{
@@ -63,16 +62,6 @@ static void dumpmemfile(uint8_t *phys, uint32_t size)
fclose(fp);
}
-static void rehide_me(void)
-{
- if (fd2 & 0x2) {
- printf("Re-hiding MEI device...");
- fd2 = *(uint32_t *)(rcba + FD2);
- *(uint32_t *)(rcba + FD2) = fd2 | 0x2;
- printf("done\n");
- }
-}
-
/* You need >4GB total ram, in kernel cmdline, use 'mem=1000m'
* then this code will clone to absolute memory address 0xe0000000
* which can be read using a mmap tool at that offset.
@@ -103,7 +92,9 @@ static void dump_me_memory(void)
printf("done\n\nHere are the first bytes:\n");
dumpmemfile(dump, 0x2000000);
//printf("Try reading 0x%zx with other mmap tool...\n"
- // "Press enter to quit, you only get one chance to run this tool before reboot required for some reason\n", me_clone);
+ // "Press enter to quit, you only get one chance to run"
+ // "this tool before reboot required for some reason\n",
+ // me_clone);
while (getc(stdin) != '\n') {};
unmap_physical(dump, 0x2000000);
}
@@ -123,27 +114,36 @@ static int pci_platform_scan(void)
pci_scan_bus(pacc);
for (dev=pacc->devices; dev; dev=dev->next) {
- pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_SIZES | PCI_FILL_CLASS);
+ pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES |
+ PCI_FILL_SIZES | PCI_FILL_CLASS);
name = pci_lookup_name(pacc, namebuf, sizeof(namebuf),
PCI_LOOKUP_DEVICE, dev->vendor_id, dev->device_id);
if (name == NULL)
name = "<unknown>";
- if (dev->vendor_id == PCI_VENDOR_ID_INTEL) {
- if (PCI_DEV_HAS_ME_DISABLE(dev->device_id)) {
- printf(CGRN "Good news, you have a `%s` so ME is present but can be disabled, continuing...\n\n" RESET, name);
- break;
- } else if (PCI_DEV_HAS_ME_DIFFICULT(dev->device_id)) {
- printf(CRED "Bad news, you have a `%s` so you have ME hardware on board and you can't control or disable it, continuing...\n\n" RESET, name);
- break;
- } else if (PCI_DEV_CAN_DISABLE_ME_IF_PRESENT(dev->device_id)) {
- printf(CYEL "Not sure if ME hardware is present because you have a `%s`, but it is possible to disable it if you do, continuing...\n\n" RESET, name);
- break;
- } else if (PCI_DEV_ME_NOT_SURE(dev->device_id)) {
- printf(CYEL "Found `%s`. Not sure whether you have ME hardware, exiting\n\n" RESET, name);
- pci_cleanup(pacc);
- return 1;
- break;
- }
+ if (dev->vendor_id != PCI_VENDOR_ID_INTEL)
+ continue;
+
+ if (PCI_DEV_HAS_ME_DISABLE(dev->device_id)) {
+ printf(CGRN "Good news, you have a `%s` so ME is "
+ "present but can be disabled, continuing...\n\n"
+ RESET, name);
+ break;
+ } else if (PCI_DEV_HAS_ME_DIFFICULT(dev->device_id)) {
+ printf(CRED "Bad news, you have a `%s` so you have ME "
+ "hardware on board and you can't control or "
+ "disable it, continuing...\n\n" RESET, name);
+ break;
+ } else if (PCI_DEV_CAN_DISABLE_ME_IF_PRESENT(dev->device_id)) {
+ printf(CYEL "Not sure if ME hardware is present "
+ "because you have a `%s`, but it is possible to "
+ "disable it if you do, continuing...\n\n" RESET,
+ name);
+ break;
+ } else if (PCI_DEV_ME_NOT_SURE(dev->device_id)) {
+ printf(CYEL "Found `%s`. Not sure whether you have ME "
+ "hardware, exiting\n\n" RESET, name);
+ pci_cleanup(pacc);
+ return 1;
}
}
@@ -152,7 +152,8 @@ static int pci_platform_scan(void)
!PCI_DEV_HAS_ME_DIFFICULT(dev->device_id) &&
!PCI_DEV_CAN_DISABLE_ME_IF_PRESENT(dev->device_id) &&
!PCI_DEV_ME_NOT_SURE(dev->device_id)) {
- printf(CCYN "ME is not present on your board or unkown\n\n" RESET);
+ printf(CCYN "ME is not present on your board or unknown\n\n"
+ RESET);
pci_cleanup(pacc);
return 1;
}
@@ -162,6 +163,43 @@ static int pci_platform_scan(void)
return 0;
}
+static int activate_me(void)
+{
+ if (read_rcba32(FD2, &fd2)) {
+ printf("Error reading RCBA\n");
+ return 1;
+ }
+ if (write_rcba32(FD2, fd2 & ~0x2)) {
+ printf("Error writing RCBA\n");
+ return 1;
+ }
+ if (debug) {
+ if (fd2 & 0x2)
+ printf("MEI was hidden on PCI, now unlocked\n");
+ else
+ printf("MEI not hidden on PCI, checking if visible\n");
+ }
+ return 0;
+}
+
+static void rehide_me(void)
+{
+ if (fd2 & 0x2) {
+ if (debug)
+ printf("Re-hiding MEI device...");
+ if (read_rcba32(FD2, &fd2)) {
+ printf("Error reading RCBA\n");
+ return;
+ }
+ if (write_rcba32(FD2, fd2 | 0x2)) {
+ printf("Error writing RCBA\n");
+ return;
+ }
+ if (debug)
+ printf("done\n");
+ }
+}
+
static struct pci_dev *pci_me_interface_scan(const char **name, char *namebuf,
int namebuf_size)
{
@@ -176,14 +214,16 @@ static struct pci_dev *pci_me_interface_scan(const char **name, char *namebuf,
pci_scan_bus(pacc);
for (dev=pacc->devices; dev; dev=dev->next) {
- pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_SIZES | PCI_FILL_CLASS);
+ pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES |
+ PCI_FILL_SIZES | PCI_FILL_CLASS);
*name = pci_lookup_name(pacc, namebuf, namebuf_size,
PCI_LOOKUP_DEVICE, dev->vendor_id, dev->device_id);
- if (dev->vendor_id == PCI_VENDOR_ID_INTEL) {
- if (PCI_DEV_HAS_SUPPORTED_ME(dev->device_id)) {
- me = 1;
- break;
- }
+ if (dev->vendor_id != PCI_VENDOR_ID_INTEL)
+ continue;
+
+ if (PCI_DEV_HAS_SUPPORTED_ME(dev->device_id)) {
+ me = 1;
+ break;
}
}
@@ -198,74 +238,28 @@ static struct pci_dev *pci_me_interface_scan(const char **name, char *namebuf,
return dev;
}
-static int activate_me(void)
-{
- struct pci_access *pacc;
- struct pci_dev *sb;
- uint32_t rcba_phys;
-
- pacc = pci_alloc();
- pacc->method = PCI_ACCESS_I386_TYPE1;
-
- pci_init(pacc);
- pci_scan_bus(pacc);
-
- sb = pci_get_dev(pacc, 0, 0, 0x1f, 0);
- if (!sb) {
- printf("Uh oh, southbridge not on BDF(0:31:0), please report this error, exiting.\n");
- pci_cleanup(pacc);
- return 1;
- }
- pci_fill_info(sb, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_SIZES | PCI_FILL_CLASS);
-
- rcba_phys = pci_read_long(sb, 0xf0) & 0xfffffffe;
- rcba = map_physical((off_t)rcba_phys, size);
- if (rcba == NULL) {
- printf("Could not map MEI PCI device memory\n");
- pci_free_dev(sb);
- pci_cleanup(pacc);
- return 1;
- }
-
- //printf("RCBA at 0x%08" PRIx32 "\n", (uint32_t)rcba_phys);
- fd2 = *(uint32_t *)(rcba + FD2);
- *(uint32_t *)(rcba + FD2) = fd2 & ~0x2;
- if (fd2 & 0x2) {
- printf("MEI was hidden on PCI, now unlocked\n");
- } else {
- printf("MEI not hidden on PCI, checking if visible\n");
- }
-
- pci_free_dev(sb);
- pci_cleanup(pacc);
-
- return 0;
-}
-
static void dump_me_info(void)
{
struct pci_dev *dev;
uint32_t stat, stat2;
char namebuf[1024];
- const char *name;
+ const char *name = NULL;
- if (pci_platform_scan()) {
+ if (pci_platform_scan())
exit(1);
- }
- if (activate_me()) {
+ if (activate_me())
exit(1);
- }
dev = pci_me_interface_scan(&name, namebuf, sizeof(namebuf));
- if (!dev) {
+ if (!dev)
exit(1);
- }
if (name == NULL)
name = "<unknown>";
- printf("MEI found: [%x:%x] %s\n\n", dev->vendor_id, dev->device_id, name);
+ printf("MEI found: [%x:%x] %s\n\n",
+ dev->vendor_id, dev->device_id, name);
stat = pci_read_long(dev, 0x40);
printf("ME Status : 0x%x\n", stat);
stat2 = pci_read_long(dev, 0x48);
@@ -276,9 +270,9 @@ static void dump_me_info(void)
intel_me_extend_valid(dev);
printf("\n");
- if (stat & 0xf000) {
- printf("ME: has a broken implementation on your board with this BIOS\n");
- }
+ if (stat & 0xf000)
+ printf("ME: has a broken implementation on your board with"
+ "this firmware\n");
intel_mei_setup(dev);
usleep(ME_COMMAND_DELAY);
@@ -292,33 +286,24 @@ static void dump_me_info(void)
usleep(ME_COMMAND_DELAY);
rehide_me();
-
- munmap((void*)rcba, size);
}
static void print_version(void)
{
printf("intelmetool v%s -- ", INTELMETOOL_VERSION);
printf("Copyright (C) 2015 Damien Zammit\n\n");
- printf(
- "This program is free software: you can redistribute it and/or modify\n"
- "it under the terms of the GNU General Public License as published by\n"
- "the Free Software Foundation, version 2 of the License.\n\n"
- "This program is distributed in the hope that it will be useful,\n"
- "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
- "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
- "GNU General Public License for more details.\n\n");
+ printf(GPLV2COPYRIGHT);
}
static void print_usage(const char *name)
{
printf("usage: %s [-vh?sd]\n", name);
printf("\n"
- " -v | --version: print the version\n"
- " -h | --help: print this help\n\n"
- " -s | --show: dump all me information on console\n"
- " -d | --debug: enable debug output\n"
- "\n");
+ " -v | --version: print the version\n"
+ " -h | --help: print this help\n\n"
+ " -s | --show: dump all me information on console\n"
+ " -d | --debug: enable debug output\n"
+ "\n");
exit(1);
}
@@ -377,7 +362,8 @@ int main(int argc, char *argv[])
}
#ifndef __DARWIN__
- if ((fd_mem = open("/dev/mem", O_RDWR)) < 0) {
+ fd_mem = open("/dev/mem", O_RDWR);
+ if (fd_mem < 0) {
perror("Can not open /dev/mem");
exit(1);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 01:39:17 +0000