1 |
/* |
2 |
* Cisco 7200 (Predator) simulation platform. |
3 |
* Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr) |
4 |
* |
5 |
* Packet SRAM. This is a fast memory zone for packets on NPE150/NPE200. |
6 |
*/ |
7 |
|
8 |
#include <stdio.h> |
9 |
#include <stdlib.h> |
10 |
#include <string.h> |
11 |
#include <unistd.h> |
12 |
#include <assert.h> |
13 |
|
14 |
#include "mips64.h" |
15 |
#include "dynamips.h" |
16 |
#include "memory.h" |
17 |
#include "device.h" |
18 |
|
19 |
#define PCI_VENDOR_SRAM 0x1137 |
20 |
#define PCI_PRODUCT_SRAM 0x0005 |
21 |
|
22 |
/* SRAM structure */ |
23 |
struct sram_data { |
24 |
/* VM object info */ |
25 |
vm_obj_t vm_obj; |
26 |
|
27 |
/* SRAM main device */ |
28 |
struct vdevice *dev; |
29 |
|
30 |
/* Aliased device */ |
31 |
char *alias_dev_name; |
32 |
struct vdevice *alias_dev; |
33 |
|
34 |
/* Byte-swapped device */ |
35 |
char *bs_dev_name; |
36 |
struct vdevice *bs_dev; |
37 |
|
38 |
/* PCI device */ |
39 |
struct pci_device *pci_dev; |
40 |
|
41 |
/* Filename used to virtualize SRAM */ |
42 |
char *filename; |
43 |
}; |
44 |
|
45 |
/* |
46 |
* SRAM byte swapped access. |
47 |
*/ |
48 |
static void *dev_sram_bs_access(cpu_mips_t *cpu,struct vdevice *dev, |
49 |
m_uint32_t offset,u_int op_size,u_int op_type, |
50 |
m_uint64_t *data) |
51 |
{ |
52 |
void *ptr = (u_char *)dev->host_addr + offset; |
53 |
|
54 |
switch(op_size) { |
55 |
case 1: |
56 |
return(ptr); |
57 |
|
58 |
case 2: |
59 |
if (op_type == MTS_READ) |
60 |
*data = swap16(htovm16(*(m_uint16_t *)ptr)); |
61 |
else |
62 |
*(m_uint16_t *)ptr = vmtoh16(swap16(*data)); |
63 |
break; |
64 |
|
65 |
case 4: |
66 |
if (op_type == MTS_READ) |
67 |
*data = swap32(htovm32(*(m_uint32_t *)ptr)); |
68 |
else |
69 |
*(m_uint32_t *)ptr = vmtoh32(swap32(*data)); |
70 |
break; |
71 |
|
72 |
case 8: |
73 |
if (op_type == MTS_READ) |
74 |
*data = swap64(htovm64(*(m_uint64_t *)ptr)); |
75 |
else |
76 |
*(m_uint64_t *)ptr = vmtoh64(swap64(*data)); |
77 |
break; |
78 |
} |
79 |
|
80 |
return NULL; |
81 |
} |
82 |
|
83 |
/* Shutdown an SRAM device */ |
84 |
void dev_c7200_sram_shutdown(vm_instance_t *vm,struct sram_data *d) |
85 |
{ |
86 |
if (d != NULL) { |
87 |
/* Remove the PCI device */ |
88 |
pci_dev_remove(d->pci_dev); |
89 |
|
90 |
/* Remove the alias, the byte-swapped and the main device */ |
91 |
dev_remove(vm,d->alias_dev); |
92 |
dev_remove(vm,d->bs_dev); |
93 |
dev_remove(vm,d->dev); |
94 |
|
95 |
/* Free devices */ |
96 |
free(d->alias_dev); |
97 |
free(d->bs_dev); |
98 |
free(d->dev); |
99 |
|
100 |
/* Free device names */ |
101 |
free(d->alias_dev_name); |
102 |
free(d->bs_dev_name); |
103 |
|
104 |
/* Remove filename used to virtualize SRAM */ |
105 |
if (d->filename) { |
106 |
unlink(d->filename); |
107 |
free(d->filename); |
108 |
} |
109 |
|
110 |
/* Free the structure itself */ |
111 |
free(d); |
112 |
} |
113 |
} |
114 |
|
115 |
/* Initialize an SRAM device */ |
116 |
int dev_c7200_sram_init(vm_instance_t *vm,char *name, |
117 |
m_uint64_t paddr,m_uint32_t len, |
118 |
struct pci_bus *pci_bus,int pci_device) |
119 |
{ |
120 |
m_uint64_t alias_paddr; |
121 |
struct sram_data *d; |
122 |
|
123 |
/* Allocate the private data structure for SRAM */ |
124 |
if (!(d = malloc(sizeof(*d)))) { |
125 |
fprintf(stderr,"dev_c7200_sram_init (%s): out of memory\n",name); |
126 |
return(-1); |
127 |
} |
128 |
|
129 |
memset(d,0,sizeof(*d)); |
130 |
|
131 |
vm_object_init(&d->vm_obj); |
132 |
d->vm_obj.name = name; |
133 |
d->vm_obj.data = d; |
134 |
d->vm_obj.shutdown = (vm_shutdown_t)dev_c7200_sram_shutdown; |
135 |
|
136 |
if (!(d->filename = vm_build_filename(vm,name))) |
137 |
return(-1); |
138 |
|
139 |
/* add as a pci device */ |
140 |
d->pci_dev = pci_dev_add_basic(pci_bus,name, |
141 |
PCI_VENDOR_SRAM,PCI_PRODUCT_SRAM, |
142 |
pci_device,0); |
143 |
|
144 |
alias_paddr = 0x100000000ULL + paddr; |
145 |
|
146 |
/* create the standard RAM zone */ |
147 |
if (!(d->dev = dev_create_ram(vm,name,d->filename,paddr,len))) { |
148 |
fprintf(stderr,"dev_c7200_sram_init: unable to create '%s' file.\n", |
149 |
d->filename); |
150 |
return(-1); |
151 |
} |
152 |
|
153 |
/* create the RAM alias */ |
154 |
if (!(d->alias_dev_name = dyn_sprintf("%s_alias",name))) { |
155 |
fprintf(stderr,"dev_c7200_sram_init: unable to create alias name.\n"); |
156 |
return(-1); |
157 |
} |
158 |
|
159 |
d->alias_dev = dev_create_ram_alias(vm,d->alias_dev_name,name, |
160 |
alias_paddr,len); |
161 |
|
162 |
if (!d->alias_dev) { |
163 |
fprintf(stderr,"dev_c7200_sram_init: unable to create alias device.\n"); |
164 |
return(-1); |
165 |
} |
166 |
|
167 |
/* create the byte-swapped zone (used with Galileo DMA) */ |
168 |
if (!(d->bs_dev_name = dyn_sprintf("%s_bswap",name))) { |
169 |
fprintf(stderr,"dev_c7200_sram_init: unable to create BS name.\n"); |
170 |
return(-1); |
171 |
} |
172 |
|
173 |
if (!(d->bs_dev = dev_create(d->bs_dev_name))) { |
174 |
fprintf(stderr,"dev_c7200_sram_init: unable to create BS device.\n"); |
175 |
return(-1); |
176 |
} |
177 |
|
178 |
d->bs_dev->phys_addr = paddr + 0x800000; |
179 |
d->bs_dev->phys_len = len; |
180 |
d->bs_dev->handler = dev_sram_bs_access; |
181 |
d->bs_dev->host_addr = (m_iptr_t)d->dev->host_addr; |
182 |
d->bs_dev->flags = VDEVICE_FLAG_NO_MTS_MMAP|VDEVICE_FLAG_CACHING; |
183 |
d->bs_dev->flags |= VDEVICE_FLAG_REMAP; |
184 |
vm_bind_device(vm,d->bs_dev); |
185 |
vm_object_add(vm,&d->vm_obj); |
186 |
return(0); |
187 |
} |