diff options
Diffstat (limited to 'qemu/roms/seabios/src/hw/pic.c')
-rw-r--r-- | qemu/roms/seabios/src/hw/pic.c | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/qemu/roms/seabios/src/hw/pic.c b/qemu/roms/seabios/src/hw/pic.c deleted file mode 100644 index d8b9764c7..000000000 --- a/qemu/roms/seabios/src/hw/pic.c +++ /dev/null @@ -1,115 +0,0 @@ -// Helpers for working with i8259 interrupt controller. -// -// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> -// Copyright (C) 2002 MandrakeSoft S.A. -// -// This file may be distributed under the terms of the GNU LGPLv3 license. - -#include "biosvar.h" // SET_IVT -#include "config.h" // CONFIG_* -#include "output.h" // dprintf -#include "pic.h" // pic_* - -u16 -pic_irqmask_read(void) -{ - if (!CONFIG_HARDWARE_IRQ) - return 0; - return inb(PORT_PIC1_DATA) | (inb(PORT_PIC2_DATA) << 8); -} - -void -pic_irqmask_write(u16 mask) -{ - if (!CONFIG_HARDWARE_IRQ) - return; - outb(mask, PORT_PIC1_DATA); - outb(mask >> 8, PORT_PIC2_DATA); -} - -void -pic_irqmask_mask(u16 off, u16 on) -{ - if (!CONFIG_HARDWARE_IRQ) - return; - u8 pic1off = off, pic1on = on, pic2off = off>>8, pic2on = on>>8; - outb((inb(PORT_PIC1_DATA) & ~pic1off) | pic1on, PORT_PIC1_DATA); - outb((inb(PORT_PIC2_DATA) & ~pic2off) | pic2on, PORT_PIC2_DATA); -} - -void -pic_reset(u8 irq0, u8 irq8) -{ - if (!CONFIG_HARDWARE_IRQ) - return; - // Send ICW1 (select OCW1 + will send ICW4) - outb(0x11, PORT_PIC1_CMD); - outb(0x11, PORT_PIC2_CMD); - // Send ICW2 (base irqs: 0x08-0x0f for irq0-7, 0x70-0x77 for irq8-15) - outb(irq0, PORT_PIC1_DATA); - outb(irq8, PORT_PIC2_DATA); - // Send ICW3 (cascaded pic ids) - outb(0x04, PORT_PIC1_DATA); - outb(0x02, PORT_PIC2_DATA); - // Send ICW4 (enable 8086 mode) - outb(0x01, PORT_PIC1_DATA); - outb(0x01, PORT_PIC2_DATA); - // Mask all irqs (except cascaded PIC2 irq) - pic_irqmask_write(PIC_IRQMASK_DEFAULT); -} - -void -pic_setup(void) -{ - dprintf(3, "init pic\n"); - pic_reset(BIOS_HWIRQ0_VECTOR, BIOS_HWIRQ8_VECTOR); -} - -void -enable_hwirq(int hwirq, struct segoff_s func) -{ - if (!CONFIG_HARDWARE_IRQ) - return; - pic_irqmask_mask(1 << hwirq, 0); - int vector; - if (hwirq < 8) - vector = BIOS_HWIRQ0_VECTOR + hwirq; - else - vector = BIOS_HWIRQ8_VECTOR + hwirq - 8; - SET_IVT(vector, func); -} - -static u8 -pic_isr1_read(void) -{ - if (!CONFIG_HARDWARE_IRQ) - return 0; - // 0x0b == select OCW1 + read ISR - outb(0x0b, PORT_PIC1_CMD); - return inb(PORT_PIC1_CMD); -} - -static u8 -pic_isr2_read(void) -{ - if (!CONFIG_HARDWARE_IRQ) - return 0; - // 0x0b == select OCW1 + read ISR - outb(0x0b, PORT_PIC2_CMD); - return inb(PORT_PIC2_CMD); -} - -// Handler for otherwise unused hardware irqs. -void VISIBLE16 -handle_hwpic1(struct bregs *regs) -{ - dprintf(DEBUG_ISR_hwpic1, "handle_hwpic1 irq=%x\n", pic_isr1_read()); - pic_eoi1(); -} - -void VISIBLE16 -handle_hwpic2(struct bregs *regs) -{ - dprintf(DEBUG_ISR_hwpic2, "handle_hwpic2 irq=%x\n", pic_isr2_read()); - pic_eoi2(); -} |