fw_config: Convert fw_config to a 64-bit field

We all knew this was coming, 32 bits is never enough. Doing this early
so that it doesn't affect too much code yet. Take care of every usage of
fw_config throughout the codebase so the conversion is all done at once.

BUG=b:169668368
TEST=Hacked up this code to OR 0x1_000_0000 with CBI-sourced FW_CONFIG
and verify the console print contained that bit.

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I6f2065d347eafa0ef7b346caeabdc3b626402092
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45939
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/ec/google/chromeec/ec.c

@@ -841,9 +841,16 @@ int google_chromeec_cbi_get_sku_id(uint32_t *id)
 	return cbi_get_uint32(id, CBI_TAG_SKU_ID);
 }
 
-int google_chromeec_cbi_get_fw_config(uint32_t *fw_config)
+int google_chromeec_cbi_get_fw_config(uint64_t *fw_config)
 {
-	return cbi_get_uint32(fw_config, CBI_TAG_FW_CONFIG);
+	uint32_t config;
+
+	if (cbi_get_uint32(&config, CBI_TAG_FW_CONFIG))
+		return -1;
+
+	/* FIXME: Yet to determine source of other 32 bits... */
+	*fw_config = (uint64_t)config;
+	return 0;
 }
 
 int google_chromeec_cbi_get_oem_id(uint32_t *id)

src/ec/google/chromeec/ec.h

@@ -83,7 +83,7 @@ int google_chromeec_reboot(int dev_idx, enum ec_reboot_cmd type, uint8_t flags);
  */
 int google_chromeec_cbi_get_oem_id(uint32_t *id);
 int google_chromeec_cbi_get_sku_id(uint32_t *id);
-int google_chromeec_cbi_get_fw_config(uint32_t *fw_config);
+int google_chromeec_cbi_get_fw_config(uint64_t *fw_config);
 int google_chromeec_cbi_get_dram_part_num(char *buf, size_t bufsize);
 int google_chromeec_cbi_get_oem_name(char *buf, size_t bufsize);
 /* version may be stored in CBI as a smaller integer width, but the EC code

src/include/fw_config.h

@@ -18,8 +18,8 @@
 struct fw_config {
 	const char *field_name;
 	const char *option_name;
-	uint32_t mask;
-	uint32_t value;
+	uint64_t mask;
+	uint64_t value;
 };
 
 /* Generate a pointer to a compound literal of the fw_config structure. */
@@ -53,7 +53,7 @@ void fw_config_for_each_found(void (*cb)(const struct fw_config *config, void *a
  *
  * Return pointer to cached `struct fw_config` if successfully probed, otherwise NULL.
 */
-const struct fw_config *fw_config_get_found(uint32_t field_mask);
+const struct fw_config *fw_config_get_found(uint64_t field_mask);
 
 #else
 

src/lib/fw_config.c

@@ -7,6 +7,7 @@
 #include <device/device.h>
 #include <ec/google/chromeec/ec.h>
 #include <fw_config.h>
+#include <inttypes.h>
 #include <lib.h>
 #include <stdbool.h>
 #include <stdint.h>
@@ -14,11 +15,11 @@
 /**
  * fw_config_get() - Provide firmware configuration value.
  *
- * Return 32bit firmware configuration value determined for the system.
+ * Return 64bit firmware configuration value determined for the system.
  */
-static uint32_t fw_config_get(void)
+static uint64_t fw_config_get(void)
 {
-	static uint32_t fw_config_value;
+	static uint64_t fw_config_value;
 	static bool fw_config_value_initialized;
 
 	/* Nothing to prepare if setup is already done. */
@@ -35,7 +36,7 @@ static uint32_t fw_config_get(void)
 			       __func__);
 			fw_config_value = 0;
 		} else {
-			printk(BIOS_INFO, "FW_CONFIG value from CBFS is 0x%08x\n",
+			printk(BIOS_INFO, "FW_CONFIG value from CBFS is 0x%" PRIx64 "\n",
 			       fw_config_value);
 			return fw_config_value;
 		}
@@ -47,7 +48,7 @@ static uint32_t fw_config_get(void)
 			printk(BIOS_WARNING, "%s: Could not get fw_config from EC\n", __func__);
 	}
 
-	printk(BIOS_INFO, "FW_CONFIG value is 0x%08x\n", fw_config_value);
+	printk(BIOS_INFO, "FW_CONFIG value is 0x%" PRIx64 "\n", fw_config_value);
 	return fw_config_value;
 }
 
@@ -59,7 +60,8 @@ bool fw_config_probe(const struct fw_config *match)
 			printk(BIOS_INFO, "fw_config match found: %s=%s\n", match->field_name,
 			       match->option_name);
 		else
-			printk(BIOS_INFO, "fw_config match found: mask=0x%08x value=0x%08x\n",
+			printk(BIOS_INFO, "fw_config match found: mask=0x%" PRIx64 " value=0x%"
+			       PRIx64 "\n",
 			       match->mask, match->value);
 		return true;
 	}
@@ -70,20 +72,20 @@ bool fw_config_probe(const struct fw_config *match)
 #if ENV_RAMSTAGE
 
 /*
- * The maximum number of fw_config fields is limited by the 32-bit mask that is used to
+ * The maximum number of fw_config fields is limited by the 64-bit mask that is used to
  * represent them.
  */
-#define MAX_CACHE_ELEMENTS	(8 * sizeof(uint32_t))
+#define MAX_CACHE_ELEMENTS	(8 * sizeof(uint64_t))
 
 static const struct fw_config *cached_configs[MAX_CACHE_ELEMENTS];
 
-static size_t probe_index(uint32_t mask)
+static size_t probe_index(uint64_t mask)
 {
 	assert(mask);
-	return __ffs(mask);
+	return __ffs64(mask);
 }
 
-const struct fw_config *fw_config_get_found(uint32_t field_mask)
+const struct fw_config *fw_config_get_found(uint64_t field_mask)
 {
 	const struct fw_config *config;
 	config = cached_configs[probe_index(field_mask)];

src/mainboard/google/dedede/board_info.c

@@ -3,7 +3,7 @@
 #include <baseboard/variants.h>
 #include <ec/google/chromeec/ec.h>
 
-int board_info_get_fw_config(uint32_t *fw_config)
+int board_info_get_fw_config(uint64_t *fw_config)
 {
 	return google_chromeec_cbi_get_fw_config(fw_config);
 }

src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h

@@ -21,7 +21,7 @@ const struct pad_config *variant_override_gpio_table(size_t *num);
  * @param fw_config	Address where the fw_config is stored.
  * @return 0 on success or negative integer for errors.
  */
-int board_info_get_fw_config(uint32_t *fw_config);
+int board_info_get_fw_config(uint64_t *fw_config);
 
 /* Return memory configuration structure. */
 const struct mb_cfg *variant_memcfg_config(void);

src/mainboard/google/zork/variants/baseboard/helpers.c

@@ -48,9 +48,9 @@ enum {
 	FW_CONFIG_SHIFT_FAN = 27,
 };
 
-static int get_fw_config(uint32_t *val)
+static int get_fw_config(uint64_t *val)
 {
-	static uint32_t known_value;
+	static uint64_t known_value;
 
 	if (known_value) {
 		*val = known_value;
@@ -67,9 +67,9 @@ static int get_fw_config(uint32_t *val)
 	return 0;
 }
 
-static unsigned int extract_field(uint32_t mask, int shift)
+static unsigned int extract_field(uint64_t mask, int shift)
 {
-	uint32_t fw_config;
+	uint64_t fw_config;
 
 	/* On errors nothing is assumed to be set. */
 	if (get_fw_config(&fw_config))