diff options
Diffstat (limited to 'hw/etraxfs_pic.c')
| -rw-r--r-- | hw/etraxfs_pic.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/hw/etraxfs_pic.c b/hw/etraxfs_pic.c deleted file mode 100644 index 635103c001..0000000000 --- a/hw/etraxfs_pic.c +++ /dev/null @@ -1,180 +0,0 @@ -/* - * QEMU ETRAX Interrupt Controller. - * - * Copyright (c) 2008 Edgar E. Iglesias, Axis Communications AB. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "hw/sysbus.h" -#include "hw/hw.h" -//#include "pc.h" -//#include "etraxfs.h" - -#define D(x) - -#define R_RW_MASK 0 -#define R_R_VECT 1 -#define R_R_MASKED_VECT 2 -#define R_R_NMI 3 -#define R_R_GURU 4 -#define R_MAX 5 - -struct etrax_pic -{ - SysBusDevice busdev; - MemoryRegion mmio; - void *interrupt_vector; - qemu_irq parent_irq; - qemu_irq parent_nmi; - uint32_t regs[R_MAX]; -}; - -static void pic_update(struct etrax_pic *fs) -{ - uint32_t vector = 0; - int i; - - fs->regs[R_R_MASKED_VECT] = fs->regs[R_R_VECT] & fs->regs[R_RW_MASK]; - - /* The ETRAX interrupt controller signals interrupts to the core - through an interrupt request wire and an irq vector bus. If - multiple interrupts are simultaneously active it chooses vector - 0x30 and lets the sw choose the priorities. */ - if (fs->regs[R_R_MASKED_VECT]) { - uint32_t mv = fs->regs[R_R_MASKED_VECT]; - for (i = 0; i < 31; i++) { - if (mv & 1) { - vector = 0x31 + i; - /* Check for multiple interrupts. */ - if (mv > 1) - vector = 0x30; - break; - } - mv >>= 1; - } - } - - if (fs->interrupt_vector) { - /* hack alert: ptr property */ - *(uint32_t*)(fs->interrupt_vector) = vector; - } - qemu_set_irq(fs->parent_irq, !!vector); -} - -static uint64_t -pic_read(void *opaque, hwaddr addr, unsigned int size) -{ - struct etrax_pic *fs = opaque; - uint32_t rval; - - rval = fs->regs[addr >> 2]; - D(printf("%s %x=%x\n", __func__, addr, rval)); - return rval; -} - -static void pic_write(void *opaque, hwaddr addr, - uint64_t value, unsigned int size) -{ - struct etrax_pic *fs = opaque; - D(printf("%s addr=%x val=%x\n", __func__, addr, value)); - - if (addr == R_RW_MASK) { - fs->regs[R_RW_MASK] = value; - pic_update(fs); - } -} - -static const MemoryRegionOps pic_ops = { - .read = pic_read, - .write = pic_write, - .endianness = DEVICE_NATIVE_ENDIAN, - .valid = { - .min_access_size = 4, - .max_access_size = 4 - } -}; - -static void nmi_handler(void *opaque, int irq, int level) -{ - struct etrax_pic *fs = (void *)opaque; - uint32_t mask; - - mask = 1 << irq; - if (level) - fs->regs[R_R_NMI] |= mask; - else - fs->regs[R_R_NMI] &= ~mask; - - qemu_set_irq(fs->parent_nmi, !!fs->regs[R_R_NMI]); -} - -static void irq_handler(void *opaque, int irq, int level) -{ - struct etrax_pic *fs = (void *)opaque; - - if (irq >= 30) - return nmi_handler(opaque, irq, level); - - irq -= 1; - fs->regs[R_R_VECT] &= ~(1 << irq); - fs->regs[R_R_VECT] |= (!!level << irq); - pic_update(fs); -} - -static int etraxfs_pic_init(SysBusDevice *dev) -{ - struct etrax_pic *s = FROM_SYSBUS(typeof (*s), dev); - - qdev_init_gpio_in(&dev->qdev, irq_handler, 32); - sysbus_init_irq(dev, &s->parent_irq); - sysbus_init_irq(dev, &s->parent_nmi); - - memory_region_init_io(&s->mmio, &pic_ops, s, "etraxfs-pic", R_MAX * 4); - sysbus_init_mmio(dev, &s->mmio); - return 0; -} - -static Property etraxfs_pic_properties[] = { - DEFINE_PROP_PTR("interrupt_vector", struct etrax_pic, interrupt_vector), - DEFINE_PROP_END_OF_LIST(), -}; - -static void etraxfs_pic_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); - - k->init = etraxfs_pic_init; - dc->props = etraxfs_pic_properties; -} - -static const TypeInfo etraxfs_pic_info = { - .name = "etraxfs,pic", - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(struct etrax_pic), - .class_init = etraxfs_pic_class_init, -}; - -static void etraxfs_pic_register_types(void) -{ - type_register_static(&etraxfs_pic_info); -} - -type_init(etraxfs_pic_register_types) |