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| author | Patrick Georgi <pgeorgi@google.com> | 2018-03-14 21:11:21 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-10-08 09:46:30 +0000 |
| commit | 9360feaf5121fb0b4b2d63e3168effe066650071 (patch) | |
| tree | dae8bcba4a33a3920e1b57e5f2d9033fa763b32d /src/soc | |
| parent | 88607a4b1002ed6acc7f316f274feea2fd861095 (diff) | |
| download | coreboot-9360feaf5121fb0b4b2d63e3168effe066650071.tar.xz | |
smmstore: Add a key/val store facility in flash, mediated through SMM
It exposes an interface that is as generic as possible, so payloads
and/or kernels can use it for their data.
Change-Id: I9553922f9dfa60b9d4b3576973ad4b84d3fe2fb5
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/25182
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/common/block/smm/smihandler.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/smm/smihandler.c b/src/soc/intel/common/block/smm/smihandler.c index e4c13dd4b9..f90ac578e3 100644 --- a/src/soc/intel/common/block/smm/smihandler.c +++ b/src/soc/intel/common/block/smm/smihandler.c @@ -27,6 +27,7 @@ #include <intelblocks/pmclib.h> #include <intelblocks/smihandler.h> #include <intelblocks/uart.h> +#include <smmstore.h> #include <soc/nvs.h> #include <soc/pm.h> #include <soc/gpio.h> @@ -294,6 +295,27 @@ static void southbridge_smi_gsmi( save_state_ops->set_reg(io_smi, RAX, ret); } +static void southbridge_smi_store( + const struct smm_save_state_ops *save_state_ops) +{ + u8 sub_command, ret; + void *io_smi; + uint32_t reg_ebx; + + io_smi = find_save_state(save_state_ops, SMMSTORE_APM_CNT); + if (!io_smi) + return; + /* Command and return value in EAX */ + sub_command = (save_state_ops->get_reg(io_smi, RAX) >> 8) & 0xff; + + /* Parameter buffer in EBX */ + reg_ebx = save_state_ops->get_reg(io_smi, RBX); + + /* drivers/smmstore/smi.c */ + ret = smmstore_exec(sub_command, (void *)reg_ebx); + save_state_ops->set_reg(io_smi, RAX, ret); +} + static void finalize(void) { static int finalize_done; @@ -366,6 +388,10 @@ void smihandler_southbridge_apmc( if (IS_ENABLED(CONFIG_ELOG_GSMI)) southbridge_smi_gsmi(save_state_ops); break; + case SMMSTORE_APM_CNT: + if (IS_ENABLED(CONFIG_SMMSTORE)) + southbridge_smi_store(save_state_ops); + break; case APM_CNT_FINALIZE: finalize(); break; |