*/
#include "probe_roms.h"
+#include "mdadm.h"
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
static void *rom_mem = MAP_FAILED;
static int rom_fd = -1;
-const static int rom_len = 0xf0000 - 0xc0000; /* option-rom memory region */
+static const int rom_len = 0xf0000 - 0xc0000; /* option-rom memory region */
static int _sigbus;
-#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+static unsigned long rom_align;
+
+static void roms_deinit(void);
+static int roms_init(void);
static void sigbus(int sig)
{
munmap(rom_mem, rom_len);
rom_mem = MAP_FAILED;
}
+ roms_deinit();
}
-int probe_roms_init(void)
+int probe_roms_init(unsigned long align)
{
- int fd;
+ int fd = -1;
int rc = 0;
+ /* valid values are 2048 and 512. 512 is for PCI-3.0 compliant
+ * systems, or systems that do not have dangerous/legacy ISA
+ * devices. 2048 should always be safe
+ */
+ if (align == 512 || align == 2048)
+ rom_align = align;
+ else
+ return -1;
+
+ if (roms_init())
+ return -1;
+
if (signal(SIGBUS, sigbus) == SIG_ERR)
rc = -1;
if (rc == 0) {
if (rc == 0)
rom_fd = fd;
- else
+ else {
+ if (fd >= 0)
+ close(fd);
probe_roms_exit();
-
+ }
return rc;
}
struct resource {
unsigned long start;
unsigned long end;
+ unsigned long data;
const char *name;
+ struct resource *next;
};
static struct resource system_rom_resource = {
.name = "System ROM",
.start = 0xf0000,
+ .data = 0,
.end = 0xfffff,
};
static struct resource extension_rom_resource = {
.name = "Extension ROM",
.start = 0xe0000,
+ .data = 0,
.end = 0xeffff,
};
-static struct resource adapter_rom_resources[] = { {
- .name = "Adapter ROM",
- .start = 0xc8000,
- .end = 0,
-}, {
- .name = "Adapter ROM",
- .start = 0,
- .end = 0,
-}, {
- .name = "Adapter ROM",
- .start = 0,
- .end = 0,
-}, {
- .name = "Adapter ROM",
- .start = 0,
- .end = 0,
-}, {
- .name = "Adapter ROM",
- .start = 0,
- .end = 0,
-}, {
- .name = "Adapter ROM",
- .start = 0,
- .end = 0,
-} };
+static struct resource *adapter_rom_resources;
static struct resource video_rom_resource = {
- .name = "Video ROM",
+ .name = "Video ROM",
.start = 0xc0000,
+ .data = 0,
.end = 0xc7fff,
};
+static int roms_init(void)
+{
+ adapter_rom_resources = malloc(sizeof(struct resource));
+ if (adapter_rom_resources == NULL)
+ return 1;
+ adapter_rom_resources->name = "Adapter ROM";
+ adapter_rom_resources->start = 0xc8000;
+ adapter_rom_resources->data = 0;
+ adapter_rom_resources->end = 0;
+ adapter_rom_resources->next = NULL;
+ return 0;
+}
+
+static void roms_deinit(void)
+{
+ struct resource *res;
+
+ res = adapter_rom_resources;
+ while (res) {
+ struct resource *tmp = res;
+
+ res = res->next;
+ free(tmp);
+ }
+}
+
#define ROMSIGNATURE 0xaa55
+
static int romsignature(const unsigned char *rom)
{
const unsigned short * const ptr = (const unsigned short *)rom;
int scan_adapter_roms(scan_fn fn)
{
/* let scan_fn examing each of the adapter roms found by probe_roms */
- int i;
+ struct resource *res = adapter_rom_resources;
int found;
if (rom_fd < 0)
return 0;
found = 0;
- for (i = 0; i < ARRAY_SIZE(adapter_rom_resources); i++) {
- struct resource *res = &adapter_rom_resources[i];
-
+ while (res) {
if (res->start) {
found = fn(isa_bus_to_virt(res->start),
- isa_bus_to_virt(res->end));
+ isa_bus_to_virt(res->end),
+ isa_bus_to_virt(res->data));
if (found)
break;
} else
break;
+ res = res->next;
}
return found;
}
+static unsigned long align(unsigned long addr, unsigned long alignment)
+{
+ return (addr + alignment - 1) & ~(alignment - 1);
+}
+
void probe_roms(void)
{
const void *rom;
unsigned long start, length, upper;
unsigned char c;
- int i;
+ struct resource *res = adapter_rom_resources;
+ __u16 val=0;
if (rom_fd < 0)
return;
/* video rom */
- upper = adapter_rom_resources[0].start;
- for (start = video_rom_resource.start; start < upper; start += 2048) {
+ upper = res->start;
+ for (start = video_rom_resource.start; start < upper; start += rom_align) {
rom = isa_bus_to_virt(start);
if (!romsignature(rom))
continue;
break;
}
- start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
+ start = align(video_rom_resource.end + 1, rom_align);
if (start < upper)
start = upper;
upper = extension_rom_resource.start;
}
+ struct resource *prev_res = res;
/* check for adapter roms on 2k boundaries */
- for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
+ for (; start < upper; start += rom_align) {
rom = isa_bus_to_virt(start);
if (!romsignature(rom))
continue;
/* 0 < length <= 0x7f * 512, historically */
length = c * 512;
+ /* Retrieve 16-bit pointer to PCI Data Structure (offset 18h-19h)
+ * The data can be within 64KB forward of the first location
+ * of this code image. The pointer is in little-endian order
+ */
+
+ if (probe_address16(rom + 0x18, &val) != 0)
+ continue;
+ val = __le16_to_cpu(val);
+
/* but accept any length that fits if checksum okay */
if (!length || start + length > upper || !romchecksum(rom, length))
continue;
- adapter_rom_resources[i].start = start;
- adapter_rom_resources[i].end = start + length - 1;
+ if (res == NULL) {
+ res = calloc(1, sizeof(struct resource));
+ if (res == NULL)
+ return;
+ prev_res->next = res;
+ }
+
+ res->start = start;
+ res->data = start + (unsigned long)val;
+ res->end = start + length - 1;
- start = adapter_rom_resources[i++].end & ~2047UL;
+ start = res->end & ~(rom_align - 1);
+ prev_res = res;
+ res = res->next;
}
}
-
projects / thirdparty / mdadm.git / blobdiff