| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <types.h> |
| #include <arch/io.h> |
| #include <device/pci_ops.h> |
| #include <console/console.h> |
| #include <device/pci_def.h> |
| #include <cpu/x86/smm.h> |
| #include <cpu/intel/em64t101_save_state.h> |
| #include <cpu/intel/model_2065x/model_2065x.h> |
| #include <southbridge/intel/common/finalize.h> |
| #include <southbridge/intel/common/pmbase.h> |
| #include <southbridge/intel/ibexpeak/me.h> |
| #include "pch.h" |
| |
| #include "nvs.h" |
| |
| /* We are using PCIe accesses for now |
| * 1. the chipset can do it |
| * 2. we don't need to worry about how we leave 0xcf8/0xcfc behind |
| */ |
| #include <northbridge/intel/ironlake/ironlake.h> |
| #include <southbridge/intel/common/gpio.h> |
| #include <southbridge/intel/common/pmutil.h> |
| |
| int southbridge_io_trap_handler(int smif) |
| { |
| switch (smif) { |
| case 0x32: |
| printk(BIOS_DEBUG, "OS Init\n"); |
| /* gnvs->smif: |
| * On success, the IO Trap Handler returns 0 |
| * On failure, the IO Trap Handler returns a value != 0 |
| */ |
| gnvs->smif = 0; |
| return 1; /* IO trap handled */ |
| } |
| |
| /* Not handled */ |
| return 0; |
| } |
| |
| static void southbridge_gate_memory_reset_real(int offset, |
| u16 use, u16 io, u16 lvl) |
| { |
| u32 reg32; |
| |
| /* Make sure it is set as GPIO */ |
| reg32 = inl(use); |
| if (!(reg32 & (1 << offset))) { |
| reg32 |= (1 << offset); |
| outl(reg32, use); |
| } |
| |
| /* Make sure it is set as output */ |
| reg32 = inl(io); |
| if (reg32 & (1 << offset)) { |
| reg32 &= ~(1 << offset); |
| outl(reg32, io); |
| } |
| |
| /* Drive the output low */ |
| reg32 = inl(lvl); |
| reg32 &= ~(1 << offset); |
| outl(reg32, lvl); |
| } |
| |
| /* |
| * Drive GPIO 60 low to gate memory reset in S3. |
| * |
| * Intel reference designs all use GPIO 60 but it is |
| * not a requirement and boards could use a different pin. |
| */ |
| void southbridge_gate_memory_reset(void) |
| { |
| u16 gpiobase; |
| |
| gpiobase = pci_read_config16(PCI_DEV(0, 0x1f, 0), GPIOBASE) & 0xfffc; |
| if (!gpiobase) |
| return; |
| |
| if (CONFIG_DRAM_RESET_GATE_GPIO >= 32) |
| southbridge_gate_memory_reset_real(CONFIG_DRAM_RESET_GATE_GPIO - 32, |
| gpiobase + GPIO_USE_SEL2, |
| gpiobase + GP_IO_SEL2, |
| gpiobase + GP_LVL2); |
| else |
| southbridge_gate_memory_reset_real(CONFIG_DRAM_RESET_GATE_GPIO, |
| gpiobase + GPIO_USE_SEL, |
| gpiobase + GP_IO_SEL, |
| gpiobase + GP_LVL); |
| } |
| |
| void southbridge_smi_monitor(void) |
| { |
| #define IOTRAP(x) (trap_sts & (1 << x)) |
| u32 trap_sts, trap_cycle; |
| u32 data, mask = 0; |
| int i; |
| |
| trap_sts = RCBA32(0x1e00); // TRSR - Trap Status Register |
| RCBA32(0x1e00) = trap_sts; // Clear trap(s) in TRSR |
| |
| trap_cycle = RCBA32(0x1e10); |
| for (i=16; i<20; i++) { |
| if (trap_cycle & (1 << i)) |
| mask |= (0xff << ((i - 16) << 2)); |
| } |
| |
| /* IOTRAP(3) SMI function call */ |
| if (IOTRAP(3)) { |
| if (gnvs && gnvs->smif) |
| io_trap_handler(gnvs->smif); // call function smif |
| return; |
| } |
| |
| /* IOTRAP(2) currently unused |
| * IOTRAP(1) currently unused */ |
| |
| /* IOTRAP(0) SMIC */ |
| if (IOTRAP(0)) { |
| if (!(trap_cycle & (1 << 24))) { // It's a write |
| printk(BIOS_DEBUG, "SMI1 command\n"); |
| data = RCBA32(0x1e18); |
| data &= mask; |
| // if (smi1) |
| // southbridge_smi_command(data); |
| // return; |
| } |
| // Fall through to debug |
| } |
| |
| printk(BIOS_DEBUG, " trapped io address = 0x%x\n", trap_cycle & 0xfffc); |
| for (i=0; i < 4; i++) if (IOTRAP(i)) printk(BIOS_DEBUG, " TRAP = %d\n", i); |
| printk(BIOS_DEBUG, " AHBE = %x\n", (trap_cycle >> 16) & 0xf); |
| printk(BIOS_DEBUG, " MASK = 0x%08x\n", mask); |
| printk(BIOS_DEBUG, " read/write: %s\n", (trap_cycle & (1 << 24)) ? "read" : "write"); |
| |
| if (!(trap_cycle & (1 << 24))) { |
| /* Write Cycle */ |
| data = RCBA32(0x1e18); |
| printk(BIOS_DEBUG, " iotrap written data = 0x%08x\n", data); |
| } |
| #undef IOTRAP |
| } |
| |
| void southbridge_update_gnvs(u8 apm_cnt, int *smm_done) |
| { |
| em64t101_smm_state_save_area_t *state = |
| smi_apmc_find_state_save(apm_cnt); |
| if (state) { |
| /* EBX in the state save contains the GNVS pointer */ |
| gnvs = (struct global_nvs *)((u32)state->rbx); |
| if (smm_points_to_smram(gnvs, sizeof(*gnvs))) { |
| printk(BIOS_ERR, "SMI#: ERROR: GNVS overlaps SMM\n"); |
| return; |
| } |
| *smm_done = 1; |
| printk(BIOS_DEBUG, "SMI#: Setting GNVS to %p\n", gnvs); |
| } |
| } |
| |
| void southbridge_finalize_all(void) |
| { |
| intel_me_finalize_smm(); |
| intel_pch_finalize_smm(); |
| intel_ironlake_finalize_smm(); |
| intel_model_2065x_finalize_smm(); |
| } |