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Diffstat (limited to 'src/arch/x86/lib/ioapic.c')
| -rw-r--r-- | src/arch/x86/lib/ioapic.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/src/arch/x86/lib/ioapic.c b/src/arch/x86/lib/ioapic.c deleted file mode 100644 index 1b131278fd..0000000000 --- a/src/arch/x86/lib/ioapic.c +++ /dev/null @@ -1,153 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2010 coresystems GmbH - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc. - */ - -#include <arch/io.h> -#include <arch/ioapic.h> -#include <console/console.h> -#include <cpu/x86/lapic.h> - -u32 io_apic_read(void *ioapic_base, u32 reg) -{ - write32(ioapic_base, reg); - return read32(ioapic_base + 0x10); -} - -void io_apic_write(void *ioapic_base, u32 reg, u32 value) -{ - write32(ioapic_base, reg); - write32(ioapic_base + 0x10, value); -} - -static int ioapic_interrupt_count(void *ioapic_base) -{ - /* Read the available number of interrupts. */ - int ioapic_interrupts = (io_apic_read(ioapic_base, 0x01) >> 16) & 0xff; - if (ioapic_interrupts == 0xff) - ioapic_interrupts = 23; - ioapic_interrupts += 1; /* Bits 23-16 specify the maximum redirection - entry, which is the number of interrupts - minus 1. */ - printk(BIOS_DEBUG, "IOAPIC: %d interrupts\n", ioapic_interrupts); - - return ioapic_interrupts; -} - -void clear_ioapic(void *ioapic_base) -{ - u32 low, high; - u32 i, ioapic_interrupts; - - printk(BIOS_DEBUG, "IOAPIC: Clearing IOAPIC at %p\n", ioapic_base); - - ioapic_interrupts = ioapic_interrupt_count(ioapic_base); - - low = DISABLED; - high = NONE; - - for (i = 0; i < ioapic_interrupts; i++) { - io_apic_write(ioapic_base, i * 2 + 0x10, low); - io_apic_write(ioapic_base, i * 2 + 0x11, high); - - printk(BIOS_SPEW, "IOAPIC: reg 0x%08x value 0x%08x 0x%08x\n", - i, high, low); - } - - if (io_apic_read(ioapic_base, 0x10) == 0xffffffff) { - printk(BIOS_WARNING, "IOAPIC not responding.\n"); - return; - } -} - -void set_ioapic_id(void *ioapic_base, u8 ioapic_id) -{ - u32 bsp_lapicid = lapicid(); - int i; - - printk(BIOS_DEBUG, "IOAPIC: Initializing IOAPIC at 0x%p\n", - ioapic_base); - printk(BIOS_DEBUG, "IOAPIC: Bootstrap Processor Local APIC = 0x%02x\n", - bsp_lapicid); - - if (ioapic_id) { - printk(BIOS_DEBUG, "IOAPIC: ID = 0x%02x\n", ioapic_id); - /* Set IOAPIC ID if it has been specified. */ - io_apic_write(ioapic_base, 0x00, - (io_apic_read(ioapic_base, 0x00) & 0xf0ffffff) | - (ioapic_id << 24)); - } - - printk(BIOS_SPEW, "IOAPIC: Dumping registers\n"); - for (i = 0; i < 3; i++) - printk(BIOS_SPEW, " reg 0x%04x: 0x%08x\n", i, - io_apic_read(ioapic_base, i)); - -} - -static void load_vectors(void *ioapic_base) -{ - u32 bsp_lapicid = lapicid(); - u32 low, high; - u32 i, ioapic_interrupts; - - ioapic_interrupts = ioapic_interrupt_count(ioapic_base); - -#if CONFIG_IOAPIC_INTERRUPTS_ON_FSB - /* - * For the Pentium 4 and above APICs deliver their interrupts - * on the front side bus, enable that. - */ - printk(BIOS_DEBUG, "IOAPIC: Enabling interrupts on FSB\n"); - io_apic_write(ioapic_base, 0x03, - io_apic_read(ioapic_base, 0x03) | (1 << 0)); -#endif -#if CONFIG_IOAPIC_INTERRUPTS_ON_APIC_SERIAL_BUS - printk(BIOS_DEBUG, "IOAPIC: Enabling interrupts on APIC serial bus\n"); - io_apic_write(ioapic_base, 0x03, 0); -#endif - - /* Enable Virtual Wire Mode. */ - low = ENABLED | TRIGGER_EDGE | POLARITY_HIGH | PHYSICAL_DEST | ExtINT; - high = bsp_lapicid << (56 - 32); - - io_apic_write(ioapic_base, 0x10, low); - io_apic_write(ioapic_base, 0x11, high); - - if (io_apic_read(ioapic_base, 0x10) == 0xffffffff) { - printk(BIOS_WARNING, "IOAPIC not responding.\n"); - return; - } - - printk(BIOS_SPEW, "IOAPIC: reg 0x%08x value 0x%08x 0x%08x\n", - 0, high, low); - low = DISABLED; - high = NONE; - for (i = 1; i < ioapic_interrupts; i++) { - io_apic_write(ioapic_base, i * 2 + 0x10, low); - io_apic_write(ioapic_base, i * 2 + 0x11, high); - - printk(BIOS_SPEW, "IOAPIC: reg 0x%08x value 0x%08x 0x%08x\n", - i, high, low); - } -} - -void setup_ioapic(void *ioapic_base, u8 ioapic_id) -{ - set_ioapic_id(ioapic_base, ioapic_id); - load_vectors(ioapic_base); -} |