#include <libpayload.h>
#include <coreboot_tables.h>
+u8 *mem_accessor_base;
+
+static u8 mem_read(u8 reg)
+{
+ return mem_accessor_base[reg];
+}
+
+static void mem_write(u8 val, u8 reg)
+{
+ mem_accessor_base[reg] = val;
+}
+
struct nvram_accessor *use_nvram = &(struct nvram_accessor) {
nvram_read,
nvram_write
};
+struct nvram_accessor *use_mem = &(struct nvram_accessor) {
+ mem_read,
+ mem_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 options_checksum_valid(const struct nvram_accessor *nvram)
{
int i;
int range_start = lib_sysinfo.cmos_range_start / 8;
return NULL;
}
+struct cb_cmos_entries *first_cmos_entry(struct cb_cmos_option_table *option_table)
+{
+ return lookup_cmos_entry(option_table, "");
+}
+
+struct cb_cmos_entries *next_cmos_entry(struct cb_cmos_entries *cmos_entry)
+{
+ struct cb_cmos_entries *next = (struct cb_cmos_entries*)((unsigned char *)cmos_entry + cmos_entry->size);
+ if (next->tag == CB_TAG_OPTION)
+ return next;
+ else
+ return NULL;
+}
+
+/* Either value or text must be NULL. Returns the field that matches "the other" for a given config_id */
+static struct cb_cmos_enums *lookup_cmos_enum_core(struct cb_cmos_option_table *option_table, int config_id, u8 *value, char *text)
+{
+ struct cb_cmos_entries *cmos_entry;
+ int len = strnlen(text, CMOS_MAX_TEXT_LENGTH);
+
+ /* cmos entries are located right after the option table. Skip them */
+ cmos_entry = (struct cb_cmos_entries*)((unsigned char *)option_table + option_table->header_length);
+ while (cmos_entry->tag == CB_TAG_OPTION)
+ cmos_entry = (struct cb_cmos_entries*)((unsigned char *)cmos_entry + cmos_entry->size);
+
+ /* cmos enums are located after cmos entries. */
+ struct cb_cmos_enums *cmos_enum;
+ for ( cmos_enum = (struct cb_cmos_enums*)cmos_entry;
+ cmos_enum->tag == CB_TAG_OPTION_ENUM;
+ cmos_enum = (struct cb_cmos_enums*)((unsigned char *)cmos_enum + cmos_enum->size)) {
+ if ((cmos_enum->config_id == config_id)
+ && ((value == NULL) || (cmos_enum->value == *value))
+ && ((text == NULL) || (memcmp((const char*)cmos_enum->text, text, len)))) {
+ return cmos_enum;
+ }
+ }
+
+ return NULL;
+}
+
+static struct cb_cmos_enums *lookup_cmos_enum_by_value(struct cb_cmos_option_table *option_table, int config_id, u8 *value)
+{
+ return lookup_cmos_enum_core(option_table, config_id, value, NULL);
+}
+
+static struct cb_cmos_enums *lookup_cmos_enum_by_label(struct cb_cmos_option_table *option_table, int config_id, char *label)
+{
+ return lookup_cmos_enum_core(option_table, config_id, NULL, label);
+}
+
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);
{
return set_option_with(use_nvram, get_system_option_table(), value, name);
}
+
+int get_option_as_string(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, char **dest, char *name)
+{
+ void *raw;
+ struct cb_cmos_entries *cmos_entry = lookup_cmos_entry(option_table, name);
+ if (!cmos_entry)
+ return 1;
+ int cmos_length = (cmos_entry->length+7)/8;
+
+ /* extra byte to ensure 0-terminated strings */
+ raw = malloc(cmos_length+1);
+ memset(raw, 0, cmos_length+1);
+
+ int ret = get_option_with(nvram, option_table, raw, name);
+
+ struct cb_cmos_enums *cmos_enum;
+ switch (cmos_entry->config) {
+ case 'h':
+ /* only works on little endian.
+ 26 bytes is enough for a 64bit value in decimal */
+ *dest = malloc(26);
+ sprintf(*dest, "%ull", *(u64*)raw);
+ break;
+ case 's':
+ *dest = strdup(raw);
+ break;
+ case 'e':
+ cmos_enum = lookup_cmos_enum_by_value(option_table, cmos_entry->config_id, (u8*)raw);
+ *dest = strdup((const char*)cmos_enum->text);
+ break;
+ default: /* fail */
+ ret = 1;
+ }
+ free(raw);
+ return ret;
+}
+
+int set_option_from_string(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, char *value, char *name)
+{
+ void *raw;
+ struct cb_cmos_entries *cmos_entry = lookup_cmos_entry(option_table, name);
+ if (!cmos_entry)
+ return 1;
+
+ struct cb_cmos_enums *cmos_enum;
+ switch (cmos_entry->config) {
+ case 'h':
+ /* only works on little endian */
+ raw = malloc(8);
+ *(u64*)raw = strtoull(value, NULL, 0);
+ break;
+ case 's':
+ raw = strdup(value);
+ break;
+ case 'e':
+ cmos_enum = lookup_cmos_enum_by_label(option_table, cmos_entry->config_id, value);
+ raw = malloc(sizeof(u32));
+ *(u32*)raw = cmos_enum->value;
+ break;
+ default: /* fail */
+ return 1;
+ }
+
+ int ret = set_option_with(nvram, option_table, raw, name);
+ free(raw);
+ return ret;
+}