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author | Joel Stanley <joel@jms.id.au> | 2022-05-17 18:16:22 +0930 |
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committer | Reza Arbab <arbab@linux.ibm.com> | 2022-05-23 10:21:04 -0500 |
commit | 9c2808f237f7ef5f93054bef6a019402ec5a2b4b (patch) | |
tree | cb9cca40c3e7dc603f517fae27227a7126ca9b80 /hw | |
parent | f8c505a4c89ed80308467330e92433208f557637 (diff) | |
download | skiboot-9c2808f237f7ef5f93054bef6a019402ec5a2b4b.zip skiboot-9c2808f237f7ef5f93054bef6a019402ec5a2b4b.tar.gz skiboot-9c2808f237f7ef5f93054bef6a019402ec5a2b4b.tar.bz2 |
xscom: Parse P10 ec revision
Use a look up table to support the p9, p10dd1 and p10dd2 conversions.
Running on a Rainier:
> [ 268.267370706,6] CPU: P10 generation processor (max 4 threads/core)
> [ 268.267372501,7] CPU: Boot CPU PIR is 0x0460 PVR is 0x00801200
> [ 268.284420384,5] CHIP: Chip ID 0000 type: P10 DD2.02
> [ 268.284464084,5] CHIP: Chip ID 0002 type: P10 DD2.02
> [ 268.284500468,5] CHIP: Chip ID 0004 type: P10 DD2.02
> [ 268.284538166,5] CHIP: Chip ID 0006 type: P10 DD2.02
> [ 268.286317879,5] PLAT: Detected Rainier platform
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Dan HorĂ¡k <dan@danny.cz>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/xscom.c | 37 |
1 files changed, 19 insertions, 18 deletions
@@ -841,41 +841,42 @@ int64_t xscom_read_cfam_chipid(uint32_t partid, uint32_t *chip_id) return rc; } +/* The recipe comes from the p10_getecid hardware procedure */ static uint8_t xscom_get_ec_rev(struct proc_chip *chip) { uint64_t ecid2 = 0; - uint8_t rev; + int8_t rev; + const int8_t *table; + /* 0 1 2 3 4 5 6 7 */ + const int8_t p9table[8] = {0, 1, -1, 2, -1, -1, -1, 3}; + const int8_t p10dd1table[8] = {0, 1, 2, 3, -1, -1, 4, -1}; + const int8_t p10dd2table[8] = {0, 2, 3, 4, -1, -1, 5, -1}; if (chip_quirk(QUIRK_MAMBO_CALLOUTS)) return 0; switch (proc_gen) { case proc_gen_p9: + table = p9table; + break; + case proc_gen_p10: + if (chip->ec_level < 0x20) + table = p10dd1table; + else + table = p10dd2table; break; default: return 0; } xscom_read(chip->id, 0x18002, &ecid2); - switch ((ecid2 >> 45) & 7) { - case 0: - rev = 0; - break; - case 1: - rev = 1; - break; - case 3: - rev = 2; - break; - case 7: - rev = 3; - break; - default: - rev = 0; - } + + rev = table[(ecid2 >> 45) & 7]; + if (rev < 0) + return 0; prlog(PR_INFO, "P%d DD%i.%i%d detected\n", - 9, + proc_gen == proc_gen_p9 ? 9 : 10, 0xf & (chip->ec_level >> 4), chip->ec_level & 0xf, rev); |