File:  [Qemu by Fabrice Bellard] / qemu / hw / realview_gic.c
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 16:48:28 2018 UTC (2 years, 7 months ago) by root
Branches: qemu, MAIN
CVS tags: qemu0091, HEAD
qemu 0.9.1

    1: /*
    2:  * ARM RealView Emulation Baseboard Interrupt Controller
    3:  *
    4:  * Copyright (c) 2006-2007 CodeSourcery.
    5:  * Written by Paul Brook
    6:  *
    7:  * This code is licenced under the GPL.
    8:  */
    9: 
   10: #include "hw.h"
   11: #include "primecell.h"
   12: 
   13: #define GIC_NIRQ 96
   14: #define NCPU 1
   15: 
   16: /* Only a single "CPU" interface is present.  */
   17: static inline int
   18: gic_get_current_cpu(void)
   19: {
   20:   return 0;
   21: }
   22: 
   23: #include "arm_gic.c"
   24: 
   25: static uint32_t realview_gic_cpu_read(void *opaque, target_phys_addr_t offset)
   26: {
   27:     gic_state *s = (gic_state *)opaque;
   28:     offset -= s->base;
   29:     return gic_cpu_read(s, gic_get_current_cpu(), offset);
   30: }
   31: 
   32: static void realview_gic_cpu_write(void *opaque, target_phys_addr_t offset,
   33:                           uint32_t value)
   34: {
   35:     gic_state *s = (gic_state *)opaque;
   36:     offset -= s->base;
   37:     gic_cpu_write(s, gic_get_current_cpu(), offset, value);
   38: }
   39: 
   40: static CPUReadMemoryFunc *realview_gic_cpu_readfn[] = {
   41:    realview_gic_cpu_read,
   42:    realview_gic_cpu_read,
   43:    realview_gic_cpu_read
   44: };
   45: 
   46: static CPUWriteMemoryFunc *realview_gic_cpu_writefn[] = {
   47:    realview_gic_cpu_write,
   48:    realview_gic_cpu_write,
   49:    realview_gic_cpu_write
   50: };
   51: 
   52: qemu_irq *realview_gic_init(uint32_t base, qemu_irq parent_irq)
   53: {
   54:     gic_state *s;
   55:     int iomemtype;
   56: 
   57:     s = gic_init(base, &parent_irq);
   58:     if (!s)
   59:         return NULL;
   60:     iomemtype = cpu_register_io_memory(0, realview_gic_cpu_readfn,
   61:                                        realview_gic_cpu_writefn, s);
   62:     cpu_register_physical_memory(base, 0x00001000, iomemtype);
   63:     return s->in;
   64: }

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