| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <amdblocks/acpimmio.h> |
| #include <console/console.h> |
| #include <amdblocks/smi.h> |
| #include <amdblocks/smm.h> |
| #include <cpu/x86/smm.h> |
| #include <soc/smi.h> |
| |
| __weak void mainboard_handle_smi(int event) |
| { |
| printk(BIOS_WARNING, "SMI event %d is missing handler\n", event); |
| } |
| |
| 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(); |
| else if (reg != SMI_REG_SMISTS0 || (status & GEVENT_MASK) == 0) |
| mainboard_handle_smi(i + bit_zero); |
| } |
| } |
| |
| 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) { |
| printk(BIOS_WARNING, "Ignoring SCI SMI: %#x\n", smi_read32(SMI_SCI_STATUS)); |
| |
| /* 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); |
| } |