#include <libpayload.h>
#include <coreboot_tables.h>
-static int options_checksum_valid(void)
+struct nvram_accessor *use_nvram = &(struct nvram_accessor) {
+ nvram_read,
+ nvram_write
+};
+
+struct cb_cmos_option_table *get_system_option_table(void)
+{
+ return phys_to_virt(lib_sysinfo.option_table);
+}
+
+static int options_checksum_valid(const struct nvram_accessor *nvram)
{
int i;
- int range_start = lib_sysinfo.cmos_range_start;
- int range_end = lib_sysinfo.cmos_range_end;
- int checksum_location = lib_sysinfo.cmos_checksum_location;
+ int range_start = lib_sysinfo.cmos_range_start / 8;
+ int range_end = lib_sysinfo.cmos_range_end / 8;
+ int checksum_location = lib_sysinfo.cmos_checksum_location / 8;
u16 checksum = 0, checksum_old;
for(i = range_start; i <= range_end; i++) {
- checksum += nvram_read(i);
+ checksum += nvram->read(i);
}
- checksum = (~checksum)&0xffff;
- checksum_old = ((nvram_read(checksum_location)<<8) | nvram_read(checksum_location+1));
+ checksum_old = ((nvram->read(checksum_location)<<8) | nvram->read(checksum_location+1));
return (checksum_old == checksum);
}
-static int get_cmos_value(u32 bitnum, u32 len, void *valptr)
+void fix_options_checksum_with(const struct nvram_accessor *nvram)
+{
+ int i;
+ int range_start = lib_sysinfo.cmos_range_start / 8;
+ int range_end = lib_sysinfo.cmos_range_end / 8;
+ int checksum_location = lib_sysinfo.cmos_checksum_location / 8;
+ u16 checksum = 0;
+
+ for(i = range_start; i <= range_end; i++) {
+ checksum += nvram->read(i);
+ }
+
+ nvram->write((checksum >> 8), checksum_location);
+ nvram->write((checksum & 0xff), checksum_location + 1);
+}
+
+void fix_options_checksum(void)
+{
+ fix_options_checksum_with(use_nvram);
+}
+
+static int get_cmos_value(const struct nvram_accessor *nvram, u32 bitnum, u32 len, void *valptr)
{
u8 *value = (u8 *)valptr;
int offs = 0;
u32 addr, bit;
u8 reg8;
- value = valptr;
-
/* Convert to byte borders */
addr=(bitnum / 8);
bit=(bitnum % 8);
/* Handle single byte or less */
if(len <= 8) {
- reg8 = nvram_read(addr);
+ reg8 = nvram->read(addr);
reg8 >>= bit;
value[0] = reg8 & ((1 << len) -1);
return 0;
/* When handling more than a byte, copy whole bytes */
while (len > 0) {
len -= 8;
- value[offs++]=nvram_read(addr++);
+ value[offs++]=nvram->read(addr++);
}
return 0;
}
-int get_option(void *dest, char *name)
+static int set_cmos_value(const struct nvram_accessor *nvram, u32 bitnum, u32 len, void *valptr)
+{
+ u8 *value = (u8 *)valptr;
+ int offs = 0;
+ u32 addr, bit;
+ u8 reg8;
+
+ /* Convert to byte borders */
+ addr=(bitnum / 8);
+ bit=(bitnum % 8);
+
+ /* Handle single byte or less */
+ if (len <= 8) {
+ reg8 = nvram->read(addr);
+ reg8 &= ~(((1 << len) - 1) << bit);
+ reg8 |= (value[0] & ((1 << len) - 1)) << bit;
+ nvram->write(reg8, addr);
+ return 0;
+ }
+
+ /* When handling more than a byte, copy whole bytes */
+ while (len > 0) {
+ len -= 8;
+ nvram->write(value[offs++], addr++);
+ }
+
+ return 0;
+}
+
+static struct cb_cmos_entries *lookup_cmos_entry(struct cb_cmos_option_table *option_table, char *name)
{
- struct cb_cmos_option_table *option_table = lib_sysinfo.option_table;
struct cb_cmos_entries *cmos_entry;
int len = strnlen(name, CMOS_MAX_NAME_LENGTH);
-
+
/* cmos entries are located right after the option table */
- cmos_entry=(struct cb_cmos_entries*)((unsigned char *)option_table + option_table->header_length);
for ( cmos_entry = (struct cb_cmos_entries*)((unsigned char *)option_table + option_table->header_length);
cmos_entry->tag == CB_TAG_OPTION;
cmos_entry = (struct cb_cmos_entries*)((unsigned char *)cmos_entry + cmos_entry->size)) {
- if (memcmp(cmos_entry->name, name, len))
+ if (memcmp((const char*)cmos_entry->name, name, len))
continue;
- if(get_cmos_value(cmos_entry->bit, cmos_entry->length, dest))
+ return cmos_entry;
+ }
+
+ printf("ERROR: No such CMOS option (%s)\n", name);
+ return NULL;
+}
+
+int get_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *dest, char *name)
+{
+ struct cb_cmos_entries *cmos_entry = lookup_cmos_entry(option_table, name);
+ if (cmos_entry) {
+ if(get_cmos_value(nvram, cmos_entry->bit, cmos_entry->length, dest))
return 1;
- if(!options_checksum_valid())
+ if(!options_checksum_valid(nvram))
return 1;
return 0;
}
+ return 1;
+}
- printf("ERROR: No such CMOS option (%s)\n", name);
+int get_option_from(struct cb_cmos_option_table *option_table, void *dest, char *name)
+{
+ return get_option_with(use_nvram, option_table, dest, name);
+}
+
+int get_option(void *dest, char *name)
+{
+ return get_option_from(get_system_option_table(), dest, name);
+}
+
+int set_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *value, char *name)
+{
+ struct cb_cmos_entries *cmos_entry = lookup_cmos_entry(option_table, name);
+ if (cmos_entry) {
+ set_cmos_value(nvram, cmos_entry->bit, cmos_entry->length, value);
+ fix_options_checksum_with(nvram);
+ return 0;
+ }
return 1;
}
+
+int set_option(void *value, char *name)
+{
+ return set_option_with(use_nvram, get_system_option_table(), value, name);
+}
projects / coreboot.git / blobdiff