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/* |
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* Cisco router simulation platform. |
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* Copyright (c) 2006 Christophe Fillot (cf@utc.fr) |
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* |
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* PCI I/O space. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <sys/types.h> |
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|
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#include "cpu.h" |
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#include "vm.h" |
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#include "dynamips.h" |
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#include "memory.h" |
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#include "device.h" |
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#include "pci_io.h" |
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|
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/* Debugging flags */ |
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#define DEBUG_ACCESS 0 |
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|
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/* Add a new PCI I/O device */ |
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struct pci_io_device *pci_io_add(struct pci_io_data *d, |
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m_uint32_t start,m_uint32_t end, |
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struct vdevice *dev,dev_handler_t handler) |
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{ |
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struct pci_io_device *p; |
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|
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if (!(p = malloc(sizeof(*p)))) { |
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fprintf(stderr,"pci_io_add: unable to create a new device.\n"); |
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return NULL; |
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} |
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|
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p->start = start; |
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p->end = end; |
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p->real_dev = dev; |
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p->handler = handler; |
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|
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p->next = d->dev_list; |
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p->pprev = &d->dev_list; |
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|
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if (d->dev_list != NULL) |
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d->dev_list->pprev = &p->next; |
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|
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d->dev_list = p; |
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return p; |
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} |
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|
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/* Remove a PCI I/O device */ |
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void pci_io_remove(struct pci_io_device *dev) |
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{ |
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if (dev != NULL) { |
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if (dev->next) |
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dev->next->pprev = dev->pprev; |
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|
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*(dev->pprev) = dev->next; |
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free(dev); |
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} |
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} |
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|
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/* |
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* pci_io_access() |
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*/ |
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static void *pci_io_access(cpu_gen_t *cpu,struct vdevice *dev, |
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m_uint32_t offset,u_int op_size,u_int op_type, |
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m_uint64_t *data) |
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{ |
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struct pci_io_data *d = dev->priv_data; |
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struct pci_io_device *p; |
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|
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#if DEBUG_ACCESS |
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if (op_type == MTS_READ) { |
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cpu_log(cpu,"PCI_IO","read request at pc=0x%llx, offset=0x%x\n", |
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cpu_get_pc(cpu),offset); |
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} else { |
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cpu_log(cpu,"PCI_IO", |
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"write request (data=0x%llx) at pc=0x%llx, offset=0x%x\n", |
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*data,cpu_get_pc(cpu),offset); |
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} |
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#endif |
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|
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if (op_type == MTS_READ) |
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*data = 0; |
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|
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for(p=d->dev_list;p;p=p->next) |
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if ((offset >= p->start) && (offset <= p->end)) { |
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return(p->handler(cpu,p->real_dev,(offset - p->start), |
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op_size,op_type,data)); |
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} |
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|
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return NULL; |
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} |
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|
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/* Remove PCI I/O space */ |
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void pci_io_data_remove(vm_instance_t *vm,struct pci_io_data *d) |
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{ |
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if (d != NULL) { |
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/* Remove the device */ |
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dev_remove(vm,&d->dev); |
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|
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/* Free the structure itself */ |
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free(d); |
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} |
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} |
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|
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/* Initialize PCI I/O space */ |
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struct pci_io_data *pci_io_data_init(vm_instance_t *vm,m_uint64_t paddr) |
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{ |
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struct pci_io_data *d; |
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|
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/* Allocate the PCI I/O data structure */ |
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if (!(d = malloc(sizeof(*d)))) { |
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fprintf(stderr,"PCI_IO: out of memory\n"); |
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return NULL; |
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} |
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|
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memset(d,0,sizeof(*d)); |
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dev_init(&d->dev); |
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d->dev.name = "pci_io"; |
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d->dev.priv_data = d; |
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d->dev.phys_addr = paddr; |
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d->dev.phys_len = 2 * 1048576; |
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d->dev.handler = pci_io_access; |
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|
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/* Map this device to the VM */ |
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vm_bind_device(vm,&d->dev); |
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return(d); |
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} |