| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <getopt.h> |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sys/mman.h> |
| #if defined(__GLIBC__) |
| #include <sys/io.h> |
| #endif |
| #include <pci/pci.h> |
| |
| #if defined(__sun) && (defined(__i386) || defined(__amd64)) |
| #define MEM_DEV "/dev/xsvc" |
| #else |
| #define MEM_DEV "/dev/mem" |
| #endif |
| |
| #define BUC_OFFSET 0x3414 |
| #define GCS_OFFSET 0x3410 |
| |
| #define SPIBAR 0x3800 |
| #define FDOC 0xb0 |
| #define FDOD 0xb4 |
| |
| enum { |
| DESCRIPTOR_MAP_SECTION = 0, |
| COMPONENT_SECTION, |
| REGION_SECTION, |
| MASTER_SECTION, |
| PCHSTRAPS_SECTION, |
| }; |
| |
| enum { |
| BUCTS_UNINITIALIZED = -1, |
| BUCTS_UNSET = 0, |
| BUCTS_SET |
| }; |
| |
| static int fd_mem = -1; |
| |
| static void print_usage(const char *name) |
| { |
| printf("usage: %s [-h?]\n", name); |
| printf("\n" |
| " -s | --set: Set the top swap bit to invert the bootblock region decoding\n" |
| " -u | --unset: Unset the top swap bit to have regular bootblock region decoding\n" |
| " -p | --print: print the current status of the hardware\n" |
| " -h | --help: print this help\n" |
| "\n"); |
| } |
| |
| static void *sys_physmap(unsigned long phys_addr, size_t len) |
| { |
| void *virt_addr = |
| mmap(0, len, PROT_WRITE | PROT_READ, MAP_SHARED, fd_mem, |
| (off_t) phys_addr); |
| return virt_addr == MAP_FAILED ? NULL : virt_addr; |
| } |
| |
| static void physunmap(void *virt_addr, size_t len) |
| { |
| if (!len) { |
| printf("Not unmapping zero size at %p\n", virt_addr); |
| return; |
| } |
| munmap(virt_addr, len); |
| } |
| |
| static void *physmap(const char *descr, unsigned long phys_addr, size_t len) |
| { |
| void *virt_addr; |
| |
| if (!descr) |
| descr = "memory"; |
| |
| if (!len) { |
| printf("Not mapping %s, zero size at 0x%08lx.\n", descr, |
| phys_addr); |
| return NULL; |
| } |
| |
| if ((getpagesize() - 1) & len) |
| fprintf(stderr, "Unaligned size 0x%lx for %s at 0x%08lx!\n", |
| (unsigned long)len, descr, phys_addr); |
| |
| if ((getpagesize() - 1) & phys_addr) |
| fprintf(stderr, "Unaligned address 0x%08lx for %s!\n", |
| phys_addr, descr); |
| |
| virt_addr = sys_physmap(phys_addr, len); |
| if (!virt_addr) { |
| fprintf(stderr, "Error accessing 0x%lx bytes %s at 0x%08lx!\n", |
| (unsigned long)len, descr, phys_addr); |
| perror("mmap(" MEM_DEV ")"); |
| if (errno == EINVAL) { |
| fprintf(stderr, "\n"); |
| fprintf(stderr, |
| "In Linux this error can be caused by the CONFIG_NONPROMISC_DEVMEM (<2.6.27),\n"); |
| fprintf(stderr, |
| "CONFIG_STRICT_DEVMEM (>=2.6.27) and CONFIG_X86_PAT kernel options.\n"); |
| fprintf(stderr, |
| "Please check if either is enabled in your kernel before reporting a failure.\n"); |
| fprintf(stderr, |
| "You can override CONFIG_X86_PAT at boot with the nopat kernel parameter but\n"); |
| fprintf(stderr, |
| "disabling the other option unfortunately requires a kernel recompile. Sorry!\n"); |
| } |
| } |
| |
| return virt_addr; |
| } |
| |
| static int get_platform_info(struct pci_dev *sb, int *has_var_bb, |
| uint32_t *rcba_addr) |
| { |
| *has_var_bb = 0; |
| switch (sb->device_id) { |
| case 0x1c44: /* Z68 */ |
| case 0x1c46: /* P67 */ |
| case 0x1c47: /* UM67 */ |
| case 0x1c49: /* HM68 */ |
| case 0x1c4a: /* H67 */ |
| case 0x1c4b: /* HM67 */ |
| case 0x1c4c: /* Q65 */ |
| case 0x1c4d: /* QS67 */ |
| case 0x1c4e: /* Q67 */ |
| case 0x1c4f: /* QM67 */ |
| case 0x1c50: /* B65 */ |
| case 0x1c52: /* C202 */ |
| case 0x1c54: /* C204 */ |
| case 0x1c56: /* C026 */ |
| case 0x1c5c: /* H61 */ |
| case 0x1d40: /* C60x/X79 */ |
| case 0x1c41: /* C60x/X79 */ |
| case 0x1e44: /* Z77 */ |
| case 0x1e46: /* Z75 */ |
| case 0x1e47: /* Q77 */ |
| case 0x1e48: /* Q75 */ |
| case 0x1e49: /* B75 */ |
| case 0x1e4a: /* H77 */ |
| case 0x1e53: /* C216 */ |
| case 0x1e55: /* QM77 */ |
| case 0x1e56: /* QS77 */ |
| case 0x1e57: /* HM77 */ |
| case 0x1e58: /* UM77 */ |
| case 0x1e59: /* HM76 */ |
| case 0x1e5d: /* HM75 */ |
| case 0x1e5e: /* HM70 */ |
| case 0x1e5f: /* NM70 */ |
| case 0x3b02: /* P55 */ |
| case 0x3b03: /* PM55 */ |
| case 0x3b06: /* H55 */ |
| case 0x3b07: /* QM55 */ |
| case 0x3b08: /* H57 */ |
| case 0x3b09: /* HM55 */ |
| case 0x3b0a: /* Q57 */ |
| case 0x3b0b: /* HM57 */ |
| case 0x3b0d: /* PCH 3400 Mobile SFF */ |
| case 0x3b0e: /* B55 */ |
| case 0x3b0f: /* QS57 */ |
| case 0x3b12: /* PCH 3400 */ |
| case 0x3b14: /* PCH 3420 */ |
| case 0x3b16: /* PCH 3450 */ |
| case 0x3b1e: /* B55 */ |
| case 0x8c40: /* Lynx Point */ |
| case 0x8c41: /* Lynx Point Mobile Eng. Sample */ |
| case 0x8c42: /* Lynx Point Desktop Eng. Sample */ |
| case 0x8c43: /* Lynx Point */ |
| case 0x8c44: /* Z87 */ |
| case 0x8c45: /* Lynx Point */ |
| *has_var_bb = 1; |
| /* fallthrough */ |
| case 0x2640: /* ICH6/ICH6R */ |
| case 0x2641: /* ICH6-M */ |
| case 0x2642: /* ICH6W/ICH6RW */ |
| case 0x2670: /* 631xESB/632xESB/3100 */ |
| case 0x27b0: /* ICH7DH */ |
| case 0x27b8: /* ICH7/ICH7R */ |
| case 0x27b9: /* ICH7M */ |
| case 0x27bd: /* ICH7MDH */ |
| case 0x27bc: /* NM10 */ |
| case 0x2810: /* ICH8/ICH8R */ |
| case 0x2811: /* ICH8M-E */ |
| case 0x2812: /* ICH8DH */ |
| case 0x2814: /* ICH8DO */ |
| case 0x2815: /* ICH8M */ |
| case 0x2910: /* ICH9 Eng. Sample */ |
| case 0x2912: /* ICH9DH */ |
| case 0x2914: /* ICH9DO */ |
| case 0x2916: /* ICH9R */ |
| case 0x2917: /* ICH9M-E */ |
| case 0x2918: /* ICH9 */ |
| case 0x2919: /* ICH9M */ |
| case 0x3a10: /* ICH10R Eng. Sample */ |
| case 0x3a14: /* ICH10D0 */ |
| case 0x3a16: /* ICH10R */ |
| case 0x3a18: /* ICH10 */ |
| case 0x3a1a: /* ICH10D */ |
| case 0x3a1e: /* ICH10 Eng. Sample*/ |
| case 0x3b00: /* PCH 3400 Desktop */ |
| case 0x3b01: /* PCH 3400 Mobile */ |
| *rcba_addr = pci_read_long(sb, 0xf0) & ~1; |
| return 0; |
| default: |
| fprintf(stderr, "Unsupported LPC bridge. Sorry.\n"); |
| return 1; |
| } |
| } |
| |
| int print_status(uint32_t rcba_addr, int has_var_bb) |
| { |
| int ret = 0; |
| volatile uint8_t *rcba; |
| int bild, ts, ts_size = 64 << 10; |
| rcba = physmap("RCBA", rcba_addr, 0x4000); |
| if (!rcba) |
| return 1; |
| |
| bild = rcba[GCS_OFFSET] & 1; |
| ts = rcba[BUC_OFFSET] & 1; |
| int spi_is_bootdevice = |
| ((*(uint16_t *)(rcba + GCS_OFFSET) >> 10) & 3) == 3; |
| |
| if (has_var_bb && spi_is_bootdevice) { |
| *(uint32_t *)(rcba + SPIBAR + FDOC) = |
| (PCHSTRAPS_SECTION << 12) | 0; |
| uint32_t pchstrap0 = *(uint32_t *)(rcba + SPIBAR + FDOD); |
| switch (pchstrap0 >> 29) { |
| case 0: |
| ts_size = 64 << 10; |
| break; |
| case 1: |
| ts_size = 128 << 10; |
| break; |
| case 2: |
| ts_size = 256 << 10; |
| break; |
| default: |
| printf("Unknown BIOS Boot-Block size (BBBS)\n"); |
| ret = 1; |
| goto out; |
| } |
| } |
| |
| printf("\nSystem status\n=============\n"); |
| printf("BILD (BIOS Interface Lock-Down) : %s\n", bild |
| ? "set, changing top swap not possible" : "unset, changing top swap is possible"); |
| printf("Top Swap : %s\n", ts ? "Enabled" : "Disabled"); |
| printf("BIOS Boot-block Size (BBDS) : %dK\n", ts_size >> 10); |
| if (ts) { |
| printf("Ranges swapped : 0x%llx-0x%08llx <-> 0x%08llx-0x%08llx", |
| ((4ULL << 30) - ts_size), |
| (4ULL << 30) - 1, |
| (4ULL << 30) - 2 * ts_size, |
| (4ULL << 30) - ts_size - 1); |
| } |
| |
| out: |
| physunmap((void *)rcba, 0x4000); |
| return ret; |
| } |
| |
| static int set_bucts(uint32_t rcba_addr, int bucts_state) |
| { |
| int ret = 0; |
| volatile uint8_t *rcba; |
| int bild; |
| rcba = physmap("RCBA", rcba_addr, 0x4000); |
| if (!rcba) |
| return 1; |
| |
| bild = rcba[GCS_OFFSET] & 1; |
| if (bild) { |
| printf("BIOS Interface Lock-Down set, Changing Top Swap not possible.\n"); |
| ret = 1; |
| goto out; |
| } |
| |
| |
| rcba[BUC_OFFSET] = bucts_state & 1; |
| if ((rcba[BUC_OFFSET] & 1) != bucts_state) { |
| fprintf(stderr, "Hu?! setting the top swap bit failed!\n"); |
| ret = 1; |
| } else { |
| printf("Setting top swap bit succeeded.\n"); |
| ret = 0; |
| } |
| |
| out: |
| physunmap((void *)rcba, 0x4000); |
| return ret; |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| struct pci_access *pacc; |
| struct pci_dev *dev, *sb = NULL; |
| #if defined(__FreeBSD__) |
| int io_fd; |
| #endif |
| int opt, option_index = 0; |
| int print_state = 0; |
| int bucts_state = BUCTS_UNINITIALIZED; |
| |
| static struct option long_options[] = { |
| {"unset", 0, 0, 'u'}, |
| {"set", 0, 0, 's'}, |
| {"print", 0, 0, 'p'}, |
| {"help", 0, 0, 'h'}, |
| {0, 0, 0, 0} |
| }; |
| |
| |
| printf("bucts utility version '" VERSION "'\n"); |
| |
| if (argv[1] == NULL) { |
| print_usage(argv[0]); |
| exit(1); |
| } |
| |
| while ((opt = getopt_long(argc, argv, "usph?:", |
| long_options, &option_index)) != EOF) { |
| switch (opt) { |
| case 'u': |
| if (bucts_state != BUCTS_UNINITIALIZED) { |
| printf("Invalid setting: multiple set/unset arguments\n"); |
| exit(1); |
| } |
| if (print_state) { |
| printf("Print and Set are mutually exclusive!\n"); |
| exit(1); |
| } |
| bucts_state = BUCTS_UNSET; |
| break; |
| case 's': |
| if (bucts_state != BUCTS_UNINITIALIZED) { |
| printf("Invalid setting: multiple set/unset arguments\n"); |
| exit(1); |
| } |
| if (print_state) { |
| printf("Print and Set are mutually exclusive!\n"); |
| exit(1); |
| } |
| bucts_state = BUCTS_SET; |
| break; |
| case 'p': |
| if (bucts_state != BUCTS_UNINITIALIZED) { |
| printf("Print and Set are mutually exclusive!\n"); |
| exit(1); |
| } |
| print_state = 1; |
| break; |
| case 'h': |
| print_usage(argv[0]); |
| exit(0); |
| case '?': |
| default: |
| print_usage(argv[0]); |
| exit(1); |
| } |
| } |
| |
| if (optind < argc) { |
| fprintf(stderr, "Error: Extra parameter found.\n"); |
| print_usage(argv[0]); |
| exit(1); |
| } |
| |
| |
| #if defined(__FreeBSD__) |
| if ((io_fd = open("/dev/io", O_RDWR)) < 0) { |
| perror("open(/dev/io)"); |
| #else |
| if (iopl(3)) { |
| perror("iopl"); |
| #endif |
| printf("You need to be root.\n"); |
| return 1; |
| } |
| |
| if ((fd_mem = open(MEM_DEV, O_RDWR | O_SYNC)) == -1) { |
| perror("Error: open(" MEM_DEV ")"); |
| return 1; |
| } |
| |
| pacc = pci_alloc(); |
| pci_init(pacc); |
| pci_scan_bus(pacc); |
| for (dev = pacc->devices; dev && !sb; dev = dev->next) { |
| pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_CLASS); |
| if (dev->vendor_id != 0x8086 || dev->device_class != 0x0601) |
| continue; |
| sb = dev; |
| } |
| if (!sb) { |
| fprintf(stderr, "Error: LPC bridge not found!\n"); |
| return 1; |
| } |
| |
| printf("Using LPC bridge %04x:%04x at %02x%02x:%02x.%02x\n", |
| sb->vendor_id, sb->device_id, sb->domain, sb->bus, sb->dev, |
| sb->func); |
| |
| int has_var_bb; |
| uint32_t rcba_addr; |
| |
| if (get_platform_info(sb, &has_var_bb, &rcba_addr)) |
| exit(1); |
| |
| if (print_state) |
| print_status(rcba_addr, has_var_bb); |
| if (bucts_state != BUCTS_UNINITIALIZED) { |
| set_bucts(rcba_addr, bucts_state); |
| print_status(rcba_addr, has_var_bb); |
| } |
| |
| close(fd_mem); |
| return 0; |
| } |