1 #include <devices/nvram.h>
2 #include <palacios/vmm.h>
3 #include <palacios/vmm_types.h>
5 extern struct vmm_os_hooks *os_hooks;
7 extern void SerialPrint(const char *format, ...);
9 #define NVRAM_REG_PORT 0x70
10 #define NVRAM_DATA_PORT 0x71
14 typedef enum {NVRAM_READY, NVRAM_REG_POSTED} nvram_state_t;
17 #define NVRAM_REG_MAX 256
20 // These are borrowed from Bochs, which borrowed from
21 // Ralf Brown's interupt list, and extended
22 #define NVRAM_REG_SEC 0x00
23 #define NVRAM_REG_SEC_ALARM 0x01
24 #define NVRAM_REG_MIN 0x02
25 #define NVRAM_REG_MIN_ALARM 0x03
26 #define NVRAM_REG_HOUR 0x04
27 #define NVRAM_REG_HOUR_ALARM 0x05
28 #define NVRAM_REG_WEEK_DAY 0x06
29 #define NVRAM_REG_MONTH_DAY 0x07
30 #define NVRAM_REG_MONTH 0x08
31 #define NVRAM_REG_YEAR 0x09
32 #define NVRAM_REG_STAT_A 0x0a
33 #define NVRAM_REG_STAT_B 0x0b
34 #define NVRAM_REG_STAT_C 0x0c
35 #define NVRAM_REG_STAT_D 0x0d
36 #define NVRAM_REG_DIAGNOSTIC_STATUS 0x0e
37 #define NVRAM_REG_SHUTDOWN_STATUS 0x0f
39 #define NVRAM_REG_FLOPPY_TYPE 0x10
40 #define NVRAM_REG_EQUIPMENT_BYTE 0x14
42 #define NVRAM_REG_BASE_MEMORY_HIGH 0x16
43 #define NVRAM_REG_BASE_MEMORY_LOW 0x15
45 #define NVRAM_REG_EXT_MEMORY_HIGH 0x18
46 #define NVRAM_REG_EXT_MEMORY_LOW 0x17
48 #define NVRAM_REG_EXT_MEMORY_2ND_HIGH 0x31
49 #define NVRAM_REG_EXT_MEMORY_2ND_LOW 0x30
51 #define NVRAM_REG_BOOTSEQ_OLD 0x2d
53 #define NVRAM_REG_AMI_BIG_MEMORY_HIGH 0x35
54 #define NVRAM_REG_AMI_BIG_MEMORY_LOW 0x34
57 #define NVRAM_REG_CSUM_HIGH 0x2e
58 #define NVRAM_REG_CSUM_LOW 0x2f
59 #define NVRAM_REG_IBM_CENTURY_BYTE 0x32
60 #define NVRAM_REG_IBM_PS2_CENTURY_BYTE 0x37
62 #define NVRAM_REG_BOOTSEQ_NEW_FIRST 0x3D
63 #define NVRAM_REG_BOOTSEQ_NEW_SECOND 0x38
66 struct nvram_internal {
67 nvram_state_t dev_state;
69 uchar_t mem_state[NVRAM_REG_MAX];
74 static int set_nvram_defaults(struct vm_device *dev)
76 struct nvram_internal * nvram_state = (struct nvram_internal*) dev->private_data;
79 // 2 1.44 MB floppy drives
81 nvram_state->mem_state[NVRAM_REG_FLOPPY_TYPE]= 0x44;
84 // For old boot sequence style, do floppy first
86 nvram_state->mem_state[NVRAM_REG_BOOTSEQ_OLD]= 0x10;
89 // For new boot sequence style, do floppy, cd, then hd
90 nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_FIRST]= 0x31;
91 nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_SECOND]= 0x20;
94 // For new boot sequence style, do cd, hd, floppy
95 nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_FIRST]= 0x23;
96 nvram_state->mem_state[NVRAM_REG_BOOTSEQ_NEW_SECOND]= 0x10;
99 // Set equipment byte to note 2 floppies, vga display, keyboard,math,floppy
100 nvram_state->mem_state[NVRAM_REG_EQUIPMENT_BYTE]= 0x4f;
102 // Set conventional memory to 640K
103 nvram_state->mem_state[NVRAM_REG_BASE_MEMORY_HIGH]= 0x02;
104 nvram_state->mem_state[NVRAM_REG_BASE_MEMORY_LOW]= 0x80;
106 // Set extended memory to 15 MB
107 nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_HIGH]= 0x3C;
108 nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_LOW]= 0x00;
109 nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_2ND_HIGH]= 0x3C;
110 nvram_state->mem_state[NVRAM_REG_EXT_MEMORY_2ND_LOW]= 0x00;
112 // Set the extended memory beyond 16 MB to 128-16 MB
113 nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_HIGH]= 0x7;
114 nvram_state->mem_state[NVRAM_REG_AMI_BIG_MEMORY_LOW]= 0x00;
123 int nvram_reset_device(struct vm_device * dev)
125 struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
127 SerialPrint("nvram: reset device\n");
131 data->dev_state = NVRAM_READY;
143 int nvram_start_device(struct vm_device *dev)
145 SerialPrint("nvram: start device\n");
150 int nvram_stop_device(struct vm_device *dev)
152 SerialPrint("nvram: stop device\n");
159 int nvram_write_reg_port(ushort_t port,
162 struct vm_device * dev)
164 struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
166 memcpy(&(data->thereg), src, 1);
172 int nvram_read_data_port(ushort_t port,
175 struct vm_device * dev)
177 struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
181 memcpy(dst, &(data->mem_state[data->thereg]), 1);
183 SerialPrint("nvram_read_data_port(%x)=%x\n",data->thereg,data->mem_state[data->thereg]);
188 int nvram_write_data_port(ushort_t port,
191 struct vm_device * dev)
193 struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
195 memcpy(&(data->mem_state[data->thereg]), src, 1);
197 SerialPrint("nvram_write_data_port(%x)=%x\n",data->thereg,data->mem_state[data->thereg]);
204 int nvram_init_device(struct vm_device * dev) {
206 struct nvram_internal *data = (struct nvram_internal *) dev->private_data;
208 SerialPrint("nvram: init_device\n");
210 memset(data->mem_state, 0, NVRAM_REG_MAX);
212 // Would read state here
213 set_nvram_defaults(dev);
215 nvram_reset_device(dev);
218 dev_hook_io(dev, NVRAM_REG_PORT, NULL, &nvram_write_reg_port);
219 dev_hook_io(dev, NVRAM_DATA_PORT, &nvram_read_data_port, &nvram_write_data_port);
224 int nvram_deinit_device(struct vm_device *dev)
228 dev_unhook_io(dev, NVRAM_REG_PORT);
229 dev_unhook_io(dev, NVRAM_DATA_PORT);
231 nvram_reset_device(dev);
239 static struct vm_device_ops dev_ops = {
240 .init = nvram_init_device,
241 .deinit = nvram_deinit_device,
242 .reset = nvram_reset_device,
243 .start = nvram_start_device,
244 .stop = nvram_stop_device,
250 struct vm_device *create_nvram() {
251 struct nvram_internal * nvram_state = os_hooks->malloc(sizeof(struct nvram_internal)+1000);
253 SerialPrint("internal at %x\n",nvram_state);
255 struct vm_device *device = create_device("NVRAM", &dev_ops, nvram_state);