diff options
Diffstat (limited to 'sys/arch/amd64/ioapic.c')
| -rw-r--r-- | sys/arch/amd64/ioapic.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/sys/arch/amd64/ioapic.c b/sys/arch/amd64/ioapic.c deleted file mode 100644 index 443142c..0000000 --- a/sys/arch/amd64/ioapic.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * Copyright (c) 2023 Ian Marco Moffett and the Osmora Team. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of Hyra nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <machine/ioapic.h> -#include <machine/ioapicvar.h> -#include <firmware/acpi/acpi.h> -#include <sys/panic.h> -#include <sys/mmio.h> -#include <sys/cdefs.h> -#include <sys/syslog.h> - -__MODULE_NAME("ioapic"); -__KERNEL_META("$Hyra$: ioapic.c, Ian Marco Moffett, " - "I/O APIC driver"); - -#define IOAPIC_BASE_OFF(off) ((void *)((uintptr_t)ioapic_base + off)) - -static void *ioapic_base = NULL; - -/* - * Reads a 32 bit value from the IOAPIC - * register space. - * - * @reg: Register to read from. - */ -static uint32_t -ioapic_readl(uint16_t reg) -{ - mmio_write32(IOAPIC_BASE_OFF(IOREGSEL), reg); - return mmio_read32(IOAPIC_BASE_OFF(IOWIN)); -} - -/* - * Writes a 32 bit value to the IOAPIC - * register space. - * - * @reg: Register to write to. - * @val: Value to write. - */ -static void -ioapic_writel(uint16_t reg, uint32_t val) -{ - mmio_write32(IOAPIC_BASE_OFF(IOREGSEL), reg); - mmio_write32(IOAPIC_BASE_OFF(IOWIN), val); -} - -/* - * Reads an I/O APIC redirection entry. - * - * @entry: Entry variable to read into. - * @index: Index to read. - */ -static void -ioapic_read_redentry(union ioapic_redentry *entry, uint8_t index) -{ - uint32_t lo, hi; - - lo = ioapic_readl(IOREDTBL + index * 2); - hi = ioapic_readl(IOREDTBL + index * 2 + 1); - - entry->value = ((uint64_t)hi << 32) | lo; -} - -/* - * Writes an I/O APIC redirection entry. - * - * @entry: Entry variable to write. - * @index: Index to write to. - */ -static void -ioapic_write_redentry(const union ioapic_redentry *entry, uint8_t index) -{ - ioapic_writel(IOREDTBL + index * 2, (uint32_t)entry->value); - ioapic_writel(IOREDTBL + index * 2 + 1, (uint32_t)(entry->value >> 32)); -} - -/* - * Mask I/O APIC pin with "raw" pin number - * (Global System Interrupt) - * - * @gsi: Global System Interrupt number - */ -void -ioapic_gsi_mask(uint8_t gsi) -{ - union ioapic_redentry redentry; - - ioapic_read_redentry(&redentry, gsi); - redentry.interrupt_mask = 1; - ioapic_write_redentry(&redentry, gsi); -} - -/* - * Unmask I/O APIC pin with "raw" pin number - * (Global System Interrupt) - * - * @gsi: Global System Interrupt number - */ -void -ioapic_gsi_unmask(uint8_t gsi) -{ - union ioapic_redentry redentry; - - ioapic_read_redentry(&redentry, gsi); - redentry.interrupt_mask = 0; - ioapic_write_redentry(&redentry, gsi); -} - -/* - * Masks I/O APIC pin via IRQ number - * - * @irq: Interrupt Request number - */ -void -ioapic_irq_mask(uint8_t irq) -{ - uint8_t gsi; - - gsi = irq_to_gsi(irq); - ioapic_gsi_mask(gsi); -} - -/* - * Unmasks I/O APIC pin via IRQ number - * - * @irq: Interrupt Request number - */ -void -ioapic_irq_unmask(uint8_t irq) -{ - uint8_t gsi; - - gsi = irq_to_gsi(irq); - ioapic_gsi_unmask(gsi); -} - -void -ioapic_set_base(void *mmio_base) -{ - if (ioapic_base == NULL) - ioapic_base = mmio_base; -} - -void -ioapic_init(void) -{ - size_t tmp; - uint8_t redir_entry_cnt; - - /* Sanity check */ - if (ioapic_base == NULL) - panic("ioapic base not set!\n"); - - tmp = ioapic_readl(IOAPICVER); - redir_entry_cnt = __SHIFTOUT(tmp, 0xFF << 16) + 1; - - KINFO("Masking %d GSIs...\n", redir_entry_cnt); - - for (uint8_t i = 0; i < redir_entry_cnt; ++i) { - ioapic_gsi_mask(i); - } -} |