diff options
Diffstat (limited to 'src/soc/amd/common')
| -rw-r--r-- | src/soc/amd/common/block/cpu/smm/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/amd/common/block/cpu/smm/smi_handler.c | 50 | ||||
| -rw-r--r-- | src/soc/amd/common/block/include/amdblocks/smm.h | 1 |
3 files changed, 52 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/cpu/smm/Makefile.inc b/src/soc/amd/common/block/cpu/smm/Makefile.inc index 0639890207..c8815227eb 100644 --- a/src/soc/amd/common/block/cpu/smm/Makefile.inc +++ b/src/soc/amd/common/block/cpu/smm/Makefile.inc @@ -1,5 +1,6 @@ ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_SMM),y) ramstage-y += smm_relocate.c +smm-y += smi_handler.c endif # CONFIG_SOC_AMD_COMMON_BLOCK_SMM diff --git a/src/soc/amd/common/block/cpu/smm/smi_handler.c b/src/soc/amd/common/block/cpu/smm/smi_handler.c new file mode 100644 index 0000000000..00c03f022e --- /dev/null +++ b/src/soc/amd/common/block/cpu/smm/smi_handler.c @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include <amdblocks/acpimmio.h> +#include <amdblocks/smi.h> +#include <amdblocks/smm.h> +#include <cpu/x86/smm.h> +#include <soc/smi.h> + +static void process_smi_sources(uint32_t reg) +{ + const uint32_t status = smi_read32(reg); + int bit_zero = 32 / sizeof(uint32_t) * (reg - SMI_REG_SMISTS0); + void (*source_handler)(void); + int i; + + for (i = 0 ; i < 32 ; i++) { + if (status & (1 << i)) { + source_handler = get_smi_source_handler(i + bit_zero); + if (source_handler) + source_handler(); + } + } + + if (reg == SMI_REG_SMISTS0) + if (status & GEVENT_MASK) + /* Gevent[23:0] are assumed to be mainboard-specific */ + mainboard_smi_gpi(status & GEVENT_MASK); + + /* Clear all events in this register */ + smi_write32(reg, status); +} + +void southbridge_smi_handler(void) +{ + const uint16_t smi_src = smi_read16(SMI_REG_POINTER); + + if (smi_src & SMI_STATUS_SRC_SCI) + /* Clear events to prevent re-entering SMI if event isn't handled */ + clear_smi_sci_status(); + if (smi_src & SMI_STATUS_SRC_0) + process_smi_sources(SMI_REG_SMISTS0); + if (smi_src & SMI_STATUS_SRC_1) + process_smi_sources(SMI_REG_SMISTS1); + if (smi_src & SMI_STATUS_SRC_2) + process_smi_sources(SMI_REG_SMISTS2); + if (smi_src & SMI_STATUS_SRC_3) + process_smi_sources(SMI_REG_SMISTS3); + if (smi_src & SMI_STATUS_SRC_4) + process_smi_sources(SMI_REG_SMISTS4); +} diff --git a/src/soc/amd/common/block/include/amdblocks/smm.h b/src/soc/amd/common/block/include/amdblocks/smm.h index 0fbef42892..637f034ada 100644 --- a/src/soc/amd/common/block/include/amdblocks/smm.h +++ b/src/soc/amd/common/block/include/amdblocks/smm.h @@ -10,3 +10,4 @@ struct smm_relocation_params { void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, size_t *smm_save_state_size); void smm_relocation_handler(int cpu, uintptr_t curr_smbase, uintptr_t staggered_smbase); +void *get_smi_source_handler(int source); |