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dpavlin |
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/* |
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* Cisco 7200 (Predator) simulation platform. |
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* Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr) |
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* |
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* Packet SRAM. This is a fast memory zone for packets on NPE150/NPE200. |
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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 <assert.h> |
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#include "mips64.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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#define PCI_VENDOR_SRAM 0x1137 |
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#define PCI_PRODUCT_SRAM 0x0005 |
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/* SRAM structure */ |
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struct sram_data { |
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/* VM object info */ |
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vm_obj_t vm_obj; |
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/* SRAM main device */ |
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struct vdevice *dev; |
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/* Aliased device */ |
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char *alias_dev_name; |
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struct vdevice *alias_dev; |
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/* Byte-swapped device */ |
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char *bs_dev_name; |
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struct vdevice *bs_dev; |
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/* PCI device */ |
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struct pci_device *pci_dev; |
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/* Filename used to virtualize SRAM */ |
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char *filename; |
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}; |
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/* |
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* SRAM byte swapped access. |
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*/ |
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static void *dev_sram_bs_access(cpu_mips_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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void *ptr = (u_char *)dev->host_addr + offset; |
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switch(op_size) { |
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case 1: |
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return(ptr); |
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case 2: |
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if (op_type == MTS_READ) |
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*data = swap16(htovm16(*(m_uint16_t *)ptr)); |
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else |
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*(m_uint16_t *)ptr = vmtoh16(swap16(*data)); |
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break; |
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case 4: |
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if (op_type == MTS_READ) |
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*data = swap32(htovm32(*(m_uint32_t *)ptr)); |
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else |
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*(m_uint32_t *)ptr = vmtoh32(swap32(*data)); |
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break; |
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case 8: |
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if (op_type == MTS_READ) |
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*data = swap64(htovm64(*(m_uint64_t *)ptr)); |
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else |
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*(m_uint64_t *)ptr = vmtoh64(swap64(*data)); |
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break; |
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} |
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return NULL; |
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} |
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/* Shutdown an SRAM device */ |
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void dev_c7200_sram_shutdown(vm_instance_t *vm,struct sram_data *d) |
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{ |
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if (d != NULL) { |
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/* Remove the PCI device */ |
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pci_dev_remove(d->pci_dev); |
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/* Remove the alias, the byte-swapped and the main device */ |
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dev_remove(vm,d->alias_dev); |
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dev_remove(vm,d->bs_dev); |
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dev_remove(vm,d->dev); |
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/* Free devices */ |
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free(d->alias_dev); |
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free(d->bs_dev); |
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free(d->dev); |
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/* Free device names */ |
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free(d->alias_dev_name); |
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free(d->bs_dev_name); |
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/* Remove filename used to virtualize SRAM */ |
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if (d->filename) { |
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unlink(d->filename); |
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free(d->filename); |
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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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/* Initialize an SRAM device */ |
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int dev_c7200_sram_init(vm_instance_t *vm,char *name, |
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m_uint64_t paddr,m_uint32_t len, |
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struct pci_bus *pci_bus,int pci_device) |
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{ |
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m_uint64_t alias_paddr; |
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struct sram_data *d; |
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/* Allocate the private data structure for SRAM */ |
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if (!(d = malloc(sizeof(*d)))) { |
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fprintf(stderr,"dev_c7200_sram_init (%s): out of memory\n",name); |
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return(-1); |
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} |
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memset(d,0,sizeof(*d)); |
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vm_object_init(&d->vm_obj); |
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d->vm_obj.name = name; |
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d->vm_obj.data = d; |
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d->vm_obj.shutdown = (vm_shutdown_t)dev_c7200_sram_shutdown; |
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if (!(d->filename = vm_build_filename(vm,name))) |
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return(-1); |
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/* add as a pci device */ |
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d->pci_dev = pci_dev_add_basic(pci_bus,name, |
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PCI_VENDOR_SRAM,PCI_PRODUCT_SRAM, |
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pci_device,0); |
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alias_paddr = 0x100000000ULL + paddr; |
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/* create the standard RAM zone */ |
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if (!(d->dev = dev_create_ram(vm,name,d->filename,paddr,len))) { |
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fprintf(stderr,"dev_c7200_sram_init: unable to create '%s' file.\n", |
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d->filename); |
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return(-1); |
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} |
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/* create the RAM alias */ |
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if (!(d->alias_dev_name = dyn_sprintf("%s_alias",name))) { |
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fprintf(stderr,"dev_c7200_sram_init: unable to create alias name.\n"); |
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return(-1); |
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} |
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d->alias_dev = dev_create_ram_alias(vm,d->alias_dev_name,name, |
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alias_paddr,len); |
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if (!d->alias_dev) { |
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fprintf(stderr,"dev_c7200_sram_init: unable to create alias device.\n"); |
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return(-1); |
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} |
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/* create the byte-swapped zone (used with Galileo DMA) */ |
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if (!(d->bs_dev_name = dyn_sprintf("%s_bswap",name))) { |
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fprintf(stderr,"dev_c7200_sram_init: unable to create BS name.\n"); |
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return(-1); |
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} |
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if (!(d->bs_dev = dev_create(d->bs_dev_name))) { |
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fprintf(stderr,"dev_c7200_sram_init: unable to create BS device.\n"); |
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return(-1); |
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} |
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d->bs_dev->phys_addr = paddr + 0x800000; |
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d->bs_dev->phys_len = len; |
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d->bs_dev->handler = dev_sram_bs_access; |
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d->bs_dev->host_addr = (m_iptr_t)d->dev->host_addr; |
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d->bs_dev->flags = VDEVICE_FLAG_NO_MTS_MMAP|VDEVICE_FLAG_CACHING; |
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d->bs_dev->flags |= VDEVICE_FLAG_REMAP; |
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vm_bind_device(vm,d->bs_dev); |
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vm_object_add(vm,&d->vm_obj); |
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return(0); |
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} |