soc/intel/broadwell: Consolidate SPD handling
Mainboards do not need to know about `pei_data` to tell northbridge code
where to find the SPD data. As done on Haswell, add the `mb_get_spd_map`
function and the `struct spd_info` type to retrieve SPD information from
mainboard code without having to use `pei_data` in said mainboard code.
Unlike Haswell MRC, Broadwell MRC uses all positions of the `spd_data`
array, not just the first. The placeholder SPD address for memory-down
seems to be different as well. Adapt the existing code to handle these
variations. Once complete, the abstraction layer for both MRC binaries
will have the same API.
Change-Id: I92a05003a319c354675368cae8e34980bd2f9e10
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55811
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
diff --git a/src/soc/intel/broadwell/include/soc/pei_wrapper.h b/src/soc/intel/broadwell/include/soc/pei_wrapper.h
index bd12a2b0..80222be 100644
--- a/src/soc/intel/broadwell/include/soc/pei_wrapper.h
+++ b/src/soc/intel/broadwell/include/soc/pei_wrapper.h
@@ -28,12 +28,17 @@
#define SPD_MEMORY_DOWN 0xff
-#define SPD_LEN 256
+struct spd_info {
+ uint8_t addresses[4];
+ unsigned int spd_index;
+};
+
+/* Mainboard callback to fill in the SPD addresses */
+void mb_get_spd_map(struct spd_info *spdi);
void broadwell_fill_pei_data(struct pei_data *pei_data);
void mainboard_fill_pei_data(struct pei_data *pei_data);
-void mainboard_fill_spd_data(struct pei_data *pei_data);
-void fill_spd_for_index(uint8_t spd[], unsigned int spd_index);
+void copy_spd(struct pei_data *pei_data, struct spd_info *spdi);
#endif
diff --git a/src/soc/intel/broadwell/raminit.c b/src/soc/intel/broadwell/raminit.c
index 70f3804..686c782 100644
--- a/src/soc/intel/broadwell/raminit.c
+++ b/src/soc/intel/broadwell/raminit.c
@@ -183,9 +183,9 @@
* 2 = disable dimm 1 on channel
* 3 = disable dimm 0+1 on channel
*/
-static int make_channel_disabled_mask(const struct pei_data *pd, int ch)
+static int make_channel_disabled_mask(const struct spd_info *spdi, int ch)
{
- return (!pd->spd_addresses[ch + ch] << 0) | (!pd->spd_addresses[ch + ch + 1] << 1);
+ return (!spdi->addresses[ch + ch] << 0) | (!spdi->addresses[ch + ch + 1] << 1);
}
void perform_raminit(const struct chipset_power_state *const power_state)
@@ -195,15 +195,22 @@
struct pei_data pei_data = { 0 };
mainboard_fill_pei_data(&pei_data);
- mainboard_fill_spd_data(&pei_data);
+
+ /* Obtain the SPD addresses from mainboard code */
+ struct spd_info spdi = { 0 };
+ mb_get_spd_map(&spdi);
+
+ if (CONFIG(HAVE_SPD_IN_CBFS))
+ copy_spd(&pei_data, &spdi);
/* Calculate unimplemented DIMM slots for each channel */
- pei_data.dimm_channel0_disabled = make_channel_disabled_mask(&pei_data, 0);
- pei_data.dimm_channel1_disabled = make_channel_disabled_mask(&pei_data, 1);
+ pei_data.dimm_channel0_disabled = make_channel_disabled_mask(&spdi, 0);
+ pei_data.dimm_channel1_disabled = make_channel_disabled_mask(&spdi, 1);
- for (size_t i = 0; i < ARRAY_SIZE(pei_data.spd_addresses); i++) {
- const uint8_t addr = pei_data.spd_addresses[i];
- pei_data.spd_addresses[i] = addr == SPD_MEMORY_DOWN ? 0 : addr;
+ /* MRC expects left-aligned SMBus addresses, and 0 for memory-down */
+ for (size_t i = 0; i < ARRAY_SIZE(spdi.addresses); i++) {
+ const uint8_t addr = spdi.addresses[i];
+ pei_data.spd_addresses[i] = addr == SPD_MEMORY_DOWN ? 0 : addr << 1;
}
post_code(0x32);
diff --git a/src/soc/intel/broadwell/spd.c b/src/soc/intel/broadwell/spd.c
index 97cac38..1af66f1 100644
--- a/src/soc/intel/broadwell/spd.c
+++ b/src/soc/intel/broadwell/spd.c
@@ -17,6 +17,8 @@
#define SPD_PART_OFF 128
#define SPD_PART_LEN 18
+#define SPD_LEN 256
+
static void print_spd_info(uint8_t spd[])
{
const int spd_banks[8] = { 8, 16, 32, 64, -1, -1, -1, -1 };
@@ -67,12 +69,12 @@
}
}
-void fill_spd_for_index(uint8_t spd[], unsigned int spd_index)
+void copy_spd(struct pei_data *pei_data, struct spd_info *spdi)
{
size_t spd_file_len;
uint8_t *spd_file = cbfs_map("spd.bin", &spd_file_len);
- printk(BIOS_DEBUG, "SPD index %d\n", spd_index);
+ printk(BIOS_DEBUG, "SPD index %d\n", spdi->spd_index);
if (!spd_file)
die("SPD data not found.");
@@ -80,16 +82,21 @@
if (spd_file_len < SPD_LEN)
die("Missing SPD data.");
- if (spd_file_len < ((spd_index + 1) * SPD_LEN)) {
+ if (spd_file_len < ((spdi->spd_index + 1) * SPD_LEN)) {
printk(BIOS_ERR, "SPD index override to 0 - old hardware?\n");
- spd_index = 0;
+ spdi->spd_index = 0;
}
- memcpy(spd, spd_file + (spd_index * SPD_LEN), SPD_LEN);
+ uint8_t *const spd = spd_file + (spdi->spd_index * SPD_LEN);
/* Make sure a valid SPD was found */
if (spd[0] == 0)
die("Invalid SPD data.");
print_spd_info(spd);
+
+ for (size_t i = 0; i < ARRAY_SIZE(spdi->addresses); i++) {
+ if (spdi->addresses[i] == SPD_MEMORY_DOWN)
+ memcpy(pei_data->spd_data[i / 2][i % 2], spd, SPD_LEN);
+ }
}