/* * This file is part of the coreboot project. * * Copyright (C) 2008-2009 coresystems GmbH * Copyright (C) 2014 Google Inc. * Copyright (C) 2017-2018 Intel Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include "chip.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * As per the BWG, Chapter 5.9.1. "PCH BIOS component will reserve * certain memory range as reserved range for BIOS usage. * For this SOC, the range will be from 0FC800000h till FE7FFFFFh" */ static const struct lpc_mmio_range cnl_lpc_fixed_mmio_ranges[] = { { PCH_PRESERVED_BASE_ADDRESS, PCH_PRESERVED_BASE_SIZE }, { 0, 0 } }; const struct lpc_mmio_range *soc_get_fixed_mmio_ranges() { return cnl_lpc_fixed_mmio_ranges; } void soc_get_gen_io_dec_range(const struct device *dev, uint32_t *gen_io_dec) { const config_t *config = dev->chip_info; gen_io_dec[0] = config->gen1_dec; gen_io_dec[1] = config->gen2_dec; gen_io_dec[2] = config->gen3_dec; gen_io_dec[3] = config->gen4_dec; } void soc_setup_dmi_pcr_io_dec(uint32_t *gen_io_dec) { /* Mirror these same settings in DMI PCR */ pcr_write32(PID_DMI, PCR_DMI_LPCLGIR1, gen_io_dec[0]); pcr_write32(PID_DMI, PCR_DMI_LPCLGIR2, gen_io_dec[1]); pcr_write32(PID_DMI, PCR_DMI_LPCLGIR3, gen_io_dec[2]); pcr_write32(PID_DMI, PCR_DMI_LPCLGIR4, gen_io_dec[3]); } uint8_t get_pch_series(void) { uint16_t lpc_did_hi_byte; /* * Fetch upper 8 bits on LPC device ID to determine PCH type * Adding 1 to the offset to fetch upper 8 bits */ lpc_did_hi_byte = pci_read_config8(PCH_DEV_LPC, PCI_DEVICE_ID + 1); if (lpc_did_hi_byte == 0x9D) return PCH_LP; else if (lpc_did_hi_byte == 0xA3) return PCH_H; else return PCH_UNKNOWN_SERIES; } #if ENV_RAMSTAGE static void soc_mirror_dmi_pcr_io_dec(void) { uint32_t io_dec_arr[] = { pci_read_config32(PCH_DEV_LPC, LPC_GEN1_DEC), pci_read_config32(PCH_DEV_LPC, LPC_GEN2_DEC), pci_read_config32(PCH_DEV_LPC, LPC_GEN3_DEC), pci_read_config32(PCH_DEV_LPC, LPC_GEN4_DEC), }; /* Mirror these same settings in DMI PCR */ soc_setup_dmi_pcr_io_dec(&io_dec_arr[0]); } static void pch_enable_ioapic(const struct device *dev) { u32 reg32; /* PCH-LP has 120 redirection entries */ const int redir_entries = 120; set_ioapic_id((void *)IO_APIC_ADDR, 0x02); /* affirm full set of redirection table entries ("write once") */ reg32 = io_apic_read((void *)IO_APIC_ADDR, 0x01); reg32 &= ~0x00ff0000; reg32 |= (redir_entries - 1) << 16; io_apic_write((void *)IO_APIC_ADDR, 0x01, reg32); /* * Select Boot Configuration register (0x03) and * use Processor System Bus (0x01) to deliver interrupts. */ io_apic_write((void *)IO_APIC_ADDR, 0x03, 0x01); } /* * PIRQ[n]_ROUT[3:0] - PIRQ Routing Control * 0x00 - 0000 = Reserved * 0x01 - 0001 = Reserved * 0x02 - 0010 = Reserved * 0x03 - 0011 = IRQ3 * 0x04 - 0100 = IRQ4 * 0x05 - 0101 = IRQ5 * 0x06 - 0110 = IRQ6 * 0x07 - 0111 = IRQ7 * 0x08 - 1000 = Reserved * 0x09 - 1001 = IRQ9 * 0x0A - 1010 = IRQ10 * 0x0B - 1011 = IRQ11 * 0x0C - 1100 = IRQ12 * 0x0D - 1101 = Reserved * 0x0E - 1110 = IRQ14 * 0x0F - 1111 = IRQ15 * PIRQ[n]_ROUT[7] - PIRQ Routing Control * 0x80 - The PIRQ is not routed. */ void soc_pch_pirq_init(const struct device *dev) { struct device *irq_dev; uint8_t pch_interrupt_routing[MAX_PXRC_CONFIG]; pch_interrupt_routing[0] = PCH_IRQ11; pch_interrupt_routing[1] = PCH_IRQ10; pch_interrupt_routing[2] = PCH_IRQ11; pch_interrupt_routing[3] = PCH_IRQ11; pch_interrupt_routing[4] = PCH_IRQ11; pch_interrupt_routing[5] = PCH_IRQ11; pch_interrupt_routing[6] = PCH_IRQ11; pch_interrupt_routing[7] = PCH_IRQ11; itss_irq_init(pch_interrupt_routing); for (irq_dev = all_devices; irq_dev; irq_dev = irq_dev->next) { u8 int_pin = 0, int_line = 0; if (!irq_dev->enabled || irq_dev->path.type != DEVICE_PATH_PCI) continue; int_pin = pci_read_config8(irq_dev, PCI_INTERRUPT_PIN); switch (int_pin) { case 1: /* INTA# */ int_line = PCH_IRQ11; break; case 2: /* INTB# */ int_line = PCH_IRQ10; break; case 3: /* INTC# */ int_line = PCH_IRQ11; break; case 4: /* INTD# */ int_line = PCH_IRQ11; break; } if (!int_line) continue; pci_write_config8(irq_dev, PCI_INTERRUPT_LINE, int_line); } } static void pch_misc_init(void) { uint8_t reg8; /* Setup NMI on errors, disable SERR */ reg8 = (inb(0x61)) & 0xf0; outb(0x61, (reg8 | (1 << 2))); /* Disable NMI sources */ outb(0x70, (1 << 7)); }; static void clock_gate_8254(const struct device *dev) { const config_t *config = dev->chip_info; if (!config->clock_gate_8254) return; itss_clock_gate_8254(); } void lpc_soc_init(struct device *dev) { /* Legacy initialization */ isa_dma_init(); pch_misc_init(); /* Enable CLKRUN_EN for power gating LPC */ lpc_enable_pci_clk_cntl(); /* Set LPC Serial IRQ mode */ if (IS_ENABLED(CONFIG_SERIRQ_CONTINUOUS_MODE)) lpc_set_serirq_mode(SERIRQ_CONTINUOUS); else lpc_set_serirq_mode(SERIRQ_QUIET); /* Interrupt configuration */ pch_enable_ioapic(dev); soc_pch_pirq_init(dev); setup_i8259(); i8259_configure_irq_trigger(9, 1); clock_gate_8254(dev); soc_mirror_dmi_pcr_io_dec(); } /* Fill up LPC IO resource structure inside SoC directory */ void pch_lpc_soc_fill_io_resources(struct device *dev) { /* * PMC pci device gets hidden from PCI bus due to Silicon * policy hence bind ACPI BASE aka ABASE (offset 0x20) with * LPC IO resources to ensure that ABASE falls under PCI reserved * IO memory range. * * Note: Don't add any more resource with same offset 0x20 * under this device space. */ pch_lpc_add_new_resource(dev, PCI_BASE_ADDRESS_4, ACPI_BASE_ADDRESS, ACPI_BASE_SIZE, IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED); } #endif