diff options
| author | Sridhar Siricilla <sridhar.siricilla@intel.com> | 2020-02-07 11:59:30 +0530 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-03-15 13:10:59 +0000 |
| commit | 59c7cb7d372ee1a90972de9de933af880fd8a042 (patch) | |
| tree | 3ebacface26f4772d9942f259c0484288d470e4a /src/soc/intel | |
| parent | d16187ed2a6bf23022119c735d24c14d6fafae4b (diff) | |
soc/intel/common: Check prerequisites for GLOBAL_RESET command
Check prerequisites before sending GLOBAL RESET command to CSE.
TEST=Verified on hatch.
Change-Id: Ia583e4033f15ec20e942202fa78e7884cf370ce4
Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38800
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/common/block/cse/cse.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/cse/cse.c b/src/soc/intel/common/block/cse/cse.c index 041656a498..648ec6a6f1 100644 --- a/src/soc/intel/common/block/cse/cse.c +++ b/src/soc/intel/common/block/cse/cse.c @@ -608,6 +608,28 @@ uint32_t me_read_config32(int offset) return pci_read_config32(PCH_DEV_CSE, offset); } +static bool cse_is_global_reset_allowed(void) +{ + /* + * Allow sending GLOBAL_RESET command only if: + * - CSE's current working state is Normal and current operation mode is Normal. + * - (or) CSE's current working state is normal and current operation mode can + * be Soft Temp Disable or Security Override Mode if CSE's Firmware SKU is + * Custom. + */ + if (!cse_is_hfs1_cws_normal()) + return false; + + if (cse_is_hfs1_com_normal()) + return true; + + if (cse_is_hfs3_fw_sku_custom()) { + if (cse_is_hfs1_com_soft_temp_disable() || cse_is_hfs1_com_secover_mei_msg()) + return true; + } + return false; +} + /* * Sends GLOBAL_RESET_REQ cmd to CSE.The reset type can be GLOBAL_RESET/CSE_RESET_ONLY. */ @@ -631,11 +653,17 @@ int cse_request_global_reset(enum rst_req_type rst_type) size_t reply_size; printk(BIOS_DEBUG, "HECI: Global Reset(Type:%d) Command\n", rst_type); + if (!(rst_type == GLOBAL_RESET || rst_type == CSE_RESET_ONLY)) { printk(BIOS_ERR, "HECI: Unsupported reset type is requested\n"); return 0; } + if (!cse_is_global_reset_allowed()) { + printk(BIOS_ERR, "HECI: CSE does not meet required prerequisites\n"); + return 0; + } + heci_reset(); reply_size = sizeof(reply); |