1 |
dpavlin |
1 |
/* |
2 |
|
|
* Cisco C7200 (Predator) NVRAM with Calendar Module. |
3 |
|
|
* Copyright (c) 2005,2006 Christophe Fillot. All rights reserved. |
4 |
|
|
* |
5 |
|
|
* Dallas DS1216 chip emulation: |
6 |
|
|
* - NVRAM |
7 |
|
|
* - Calendar |
8 |
|
|
* |
9 |
|
|
* Manuals: |
10 |
|
|
* http://pdfserv.maxim-ic.com/en/ds/DS1216-DS1216H.pdf |
11 |
|
|
* |
12 |
|
|
* Calendar stuff written by Mtve. |
13 |
|
|
*/ |
14 |
|
|
|
15 |
|
|
#include <stdio.h> |
16 |
|
|
#include <stdlib.h> |
17 |
|
|
#include <string.h> |
18 |
|
|
#include <time.h> |
19 |
|
|
#include <errno.h> |
20 |
|
|
|
21 |
|
|
#include "mips64.h" |
22 |
|
|
#include "dynamips.h" |
23 |
|
|
#include "memory.h" |
24 |
|
|
#include "device.h" |
25 |
|
|
|
26 |
|
|
#define DEBUG_ACCESS 0 |
27 |
|
|
|
28 |
|
|
/* SmartWatch pattern (p.5 of documentation) */ |
29 |
|
|
#define PATTERN 0x5ca33ac55ca33ac5ULL |
30 |
|
|
|
31 |
|
|
/* NVRAM private data */ |
32 |
|
|
struct nvram_data { |
33 |
|
|
vm_obj_t vm_obj; |
34 |
|
|
struct vdevice dev; |
35 |
|
|
char *filename; |
36 |
|
|
u_int cal_state; |
37 |
|
|
m_uint64_t cal_read,cal_write; |
38 |
|
|
}; |
39 |
|
|
|
40 |
|
|
/* Convert an 8-bit number to a BCD form */ |
41 |
|
|
static m_uint8_t u8_to_bcd(m_uint8_t val) |
42 |
|
|
{ |
43 |
|
|
return(((val / 10) << 4) + (val % 10)); |
44 |
|
|
} |
45 |
|
|
|
46 |
|
|
/* Get the current time (p.8) */ |
47 |
|
|
static m_uint64_t get_current_time(cpu_mips_t *cpu) |
48 |
|
|
{ |
49 |
|
|
m_uint64_t res; |
50 |
|
|
struct tm *tmx; |
51 |
|
|
time_t ct; |
52 |
|
|
|
53 |
|
|
time(&ct); |
54 |
|
|
tmx = localtime(&ct); |
55 |
|
|
|
56 |
|
|
res = u8_to_bcd(tmx->tm_sec) << 8; |
57 |
|
|
res += u8_to_bcd(tmx->tm_min) << 16; |
58 |
|
|
res += u8_to_bcd(tmx->tm_hour) << 24; |
59 |
|
|
res += ((m_uint64_t)(u8_to_bcd(tmx->tm_wday))) << 32; |
60 |
|
|
res += ((m_uint64_t)(u8_to_bcd(tmx->tm_mday))) << 40; |
61 |
|
|
res += ((m_uint64_t)(u8_to_bcd(tmx->tm_mon+1))) << 48; |
62 |
|
|
res += ((m_uint64_t)(u8_to_bcd(tmx->tm_year))) << 56; |
63 |
|
|
|
64 |
|
|
return(res); |
65 |
|
|
} |
66 |
|
|
|
67 |
|
|
/* |
68 |
|
|
* dev_nvram_access() |
69 |
|
|
*/ |
70 |
|
|
void *dev_nvram_access(cpu_mips_t *cpu,struct vdevice *dev, |
71 |
|
|
m_uint32_t offset,u_int op_size,u_int op_type, |
72 |
|
|
m_uint64_t *data) |
73 |
|
|
{ |
74 |
|
|
struct nvram_data *d = dev->priv_data; |
75 |
|
|
|
76 |
|
|
#if DEBUG_ACCESS |
77 |
|
|
if (op_type == MTS_READ) |
78 |
|
|
cpu_log(cpu,dev->name,"read access to offset = 0x%x, pc = 0x%llx\n", |
79 |
|
|
offset,cpu->pc); |
80 |
|
|
else |
81 |
|
|
cpu_log(cpu,dev->name,"write access to vaddr = 0x%x, pc = 0x%llx, " |
82 |
|
|
"val = 0x%llx\n",offset,cpu->pc,*data); |
83 |
|
|
#endif |
84 |
|
|
|
85 |
|
|
switch(offset) { |
86 |
|
|
case 0x03: |
87 |
|
|
if (op_type == MTS_READ) { |
88 |
|
|
*data = d->cal_read & 1; |
89 |
|
|
d->cal_read >>= 1; |
90 |
|
|
} else { |
91 |
|
|
d->cal_write >>= 1; |
92 |
|
|
d->cal_write |= *data << 63; |
93 |
|
|
|
94 |
|
|
if (d->cal_write == PATTERN) { |
95 |
|
|
d->cal_state = 1; |
96 |
|
|
vm_log(cpu->vm,"Calendar","reset\n"); |
97 |
|
|
d->cal_read = get_current_time(cpu); |
98 |
|
|
} else if(d->cal_state > 0 && d->cal_state++ == 64) { |
99 |
|
|
/* untested */ |
100 |
|
|
vm_log(cpu->vm,"Calendar","set 0x%016llx\n",d->cal_write); |
101 |
|
|
d->cal_state = 0; |
102 |
|
|
} |
103 |
|
|
} |
104 |
|
|
return NULL; |
105 |
|
|
} |
106 |
|
|
|
107 |
|
|
return((void *)(dev->host_addr + offset)); |
108 |
|
|
} |
109 |
|
|
|
110 |
|
|
/* Set appropriately the config register if the NVRAM is empty */ |
111 |
|
|
static void set_config_register(struct vdevice *dev,u_int *conf_reg) |
112 |
|
|
{ |
113 |
|
|
m_uint32_t *ptr; |
114 |
|
|
int i; |
115 |
|
|
|
116 |
|
|
ptr = (m_uint32_t *)dev->host_addr; |
117 |
|
|
for(i=0;i<(dev->phys_len/4);i++,ptr++) |
118 |
|
|
if (*ptr) return; |
119 |
|
|
|
120 |
|
|
/* |
121 |
|
|
* nvram is empty: tells IOS to ignore its contents. |
122 |
|
|
* http://www.cisco.com/en/US/products/hw/routers/ps274/products_installation_guide_chapter09186a008007de4c.html |
123 |
|
|
*/ |
124 |
|
|
*conf_reg |= 0x0040; |
125 |
|
|
printf("NVRAM is empty, setting config register to 0x%x\n",*conf_reg); |
126 |
|
|
} |
127 |
|
|
|
128 |
|
|
/* Shutdown the NVRAM device */ |
129 |
|
|
void dev_nvram_shutdown(vm_instance_t *vm,struct nvram_data *d) |
130 |
|
|
{ |
131 |
|
|
if (d != NULL) { |
132 |
|
|
/* Remove the device */ |
133 |
|
|
dev_remove(vm,&d->dev); |
134 |
|
|
|
135 |
|
|
/* We don't remove the file, since it used as permanent storage */ |
136 |
|
|
if (d->filename) |
137 |
|
|
free(d->filename); |
138 |
|
|
|
139 |
|
|
/* Free the structure itself */ |
140 |
|
|
free(d); |
141 |
|
|
} |
142 |
|
|
} |
143 |
|
|
|
144 |
|
|
/* Create the NVRAM device */ |
145 |
|
|
int dev_nvram_init(vm_instance_t *vm,char *name, |
146 |
|
|
m_uint64_t paddr,m_uint32_t len, |
147 |
|
|
u_int *conf_reg) |
148 |
|
|
{ |
149 |
|
|
struct nvram_data *d; |
150 |
|
|
u_char *ptr; |
151 |
|
|
|
152 |
|
|
/* allocate the private data structure */ |
153 |
|
|
if (!(d = malloc(sizeof(*d)))) { |
154 |
|
|
fprintf(stderr,"NVRAM: out of memory\n"); |
155 |
|
|
return(-1); |
156 |
|
|
} |
157 |
|
|
|
158 |
|
|
memset(d,0,sizeof(*d)); |
159 |
|
|
|
160 |
|
|
vm_object_init(&d->vm_obj); |
161 |
|
|
d->vm_obj.name = name; |
162 |
|
|
d->vm_obj.data = d; |
163 |
|
|
d->vm_obj.shutdown = (vm_shutdown_t)dev_nvram_shutdown; |
164 |
|
|
|
165 |
|
|
if (!(d->filename = vm_build_filename(vm,name))) { |
166 |
|
|
fprintf(stderr,"NVRAM: unable to create filename.\n"); |
167 |
|
|
return(-1); |
168 |
|
|
} |
169 |
|
|
|
170 |
|
|
dev_init(&d->dev); |
171 |
|
|
d->dev.name = name; |
172 |
|
|
d->dev.phys_addr = paddr; |
173 |
|
|
d->dev.phys_len = len; |
174 |
|
|
d->dev.handler = dev_nvram_access; |
175 |
|
|
d->dev.fd = memzone_create_file(d->filename,d->dev.phys_len,&ptr); |
176 |
|
|
d->dev.host_addr = (m_iptr_t)ptr; |
177 |
|
|
d->dev.flags = VDEVICE_FLAG_NO_MTS_MMAP|VDEVICE_FLAG_SYNC; |
178 |
|
|
d->dev.priv_data = d; |
179 |
|
|
|
180 |
|
|
if (d->dev.fd == -1) { |
181 |
|
|
fprintf(stderr,"NVRAM: unable to map file '%s'\n",d->filename); |
182 |
|
|
return(-1); |
183 |
|
|
} |
184 |
|
|
|
185 |
|
|
/* Modify the configuration register if NVRAM is empty */ |
186 |
|
|
set_config_register(&d->dev,conf_reg); |
187 |
|
|
|
188 |
|
|
/* Map this device to the VM */ |
189 |
|
|
vm_bind_device(vm,&d->dev); |
190 |
|
|
vm_object_add(vm,&d->vm_obj); |
191 |
|
|
return(0); |
192 |
|
|
} |
193 |
dpavlin |
2 |
|
194 |
|
|
/* Compute NVRAM checksum */ |
195 |
|
|
m_uint16_t nvram_cksum(vm_instance_t *vm,m_uint64_t addr,size_t count) |
196 |
|
|
{ |
197 |
|
|
m_uint32_t sum = 0; |
198 |
|
|
|
199 |
|
|
while(count > 1) { |
200 |
|
|
sum = sum + physmem_copy_u16_from_vm(vm,addr); |
201 |
|
|
addr += sizeof(m_uint16_t); |
202 |
|
|
count -= sizeof(m_uint16_t); |
203 |
|
|
} |
204 |
|
|
|
205 |
|
|
if (count > 0) |
206 |
|
|
sum = sum + ((physmem_copy_u16_from_vm(vm,addr) & 0xFF) << 8); |
207 |
|
|
|
208 |
|
|
while(sum>>16) |
209 |
|
|
sum = (sum & 0xffff) + (sum >> 16); |
210 |
|
|
|
211 |
|
|
return(~sum); |
212 |
|
|
} |