#define USE_GENERIC 1
-#define ROMBIOS_START 0x000f0000
-#define VGABIOS_START 0x000c0000
info->cpu_mode = REAL;
info->mem_mode = PHYSICAL_MEM;
- // Amount of ram the Guest will have
- info->mem_size = config_ptr->mem_size;
+ // Amount of ram the Guest will have, rounded to a 4K page boundary
+ info->mem_size = config_ptr->mem_size & ~(addr_t)0xfff;
// Configure the memory map for the guest
- setup_memory_map(info, config_ptr);
+ if (setup_memory_map(info, config_ptr) == -1) {
+ PrintError("Setting up guest memory map failed...\n");
+ return -1;
+ }
// Configure the devices for the guest
setup_devices(info, config_ptr);
* We need to make sure the memory map extends to cover it
*/
static int setup_memory_map(struct guest_info * info, struct v3_vm_config * config_ptr) {
+ addr_t mem_pages = info->mem_size >> 12;
- /* layout rombios */
- {
- uint_t num_pages = (config_ptr->rombios_size + PAGE_SIZE - 1) / PAGE_SIZE;
- void * guest_mem = V3_AllocPages(num_pages);
+ PrintDebug("Setting up memory map (memory size=%dMB)\n", (uint_t)(info->mem_size / (1024 * 1024)));
- PrintDebug("Layout Region %d bytes\n", config_ptr->rombios_size);
- memcpy(V3_VAddr(guest_mem), config_ptr->rombios, config_ptr->rombios_size);
-
- v3_add_shadow_mem(info, ROMBIOS_START, ROMBIOS_START + (num_pages * PAGE_SIZE) - 1, (addr_t)guest_mem);
-
- PrintDebug("Adding Shadow Region (0x%p-0x%p) -> 0x%p\n",
- (void *)ROMBIOS_START,
- (void *)ROMBIOS_START + (num_pages * PAGE_SIZE),
- (void *)guest_mem);
+ // Fill up to the 640K hole
+ if (mem_pages >= 160) {
+ if (v3_add_shadow_mem(info, 0x0, 0xa0000, (addr_t)V3_AllocPages(160)) == -1) {
+ PrintError("Could not map full conventional memory\n");
+ return -1;
+ }
+ } else {
+ // Less than 640k of memory
+ if (v3_add_shadow_mem(info, 0x0, (mem_pages * PAGE_SIZE), (addr_t)V3_AllocPages(mem_pages)) == -1) {
+ PrintError("Could not map subset of conventional memory\n");
+ return -1;
+ };
}
+#define VGABIOS_START 0x000c0000
+#define ROMBIOS_START 0x000f0000
+
+ // VGA frame buffer
+ if (1) {
+ if (v3_add_shadow_mem(info, 0xa0000, 0xc0000, 0xa0000) == -1) {
+ PrintError("Could not map VGA framebuffer\n");
+ return -1;
+ }
+ } else {
+ v3_hook_write_mem(info, 0xa0000, 0xc0000, 0xa0000, passthrough_mem_write, NULL);
+ }
+
+
/* layout vgabios */
{
uint_t num_pages = (config_ptr->vgabios_size + PAGE_SIZE - 1) / PAGE_SIZE;
void * guest_mem = V3_AllocPages(num_pages);
+ addr_t vgabios_end = VGABIOS_START + (num_pages * PAGE_SIZE);
PrintDebug("Layout Region %d bytes\n", config_ptr->vgabios_size);
memcpy(V3_VAddr(guest_mem), config_ptr->vgabios, config_ptr->vgabios_size);
- v3_add_shadow_mem(info, VGABIOS_START, VGABIOS_START + (num_pages * PAGE_SIZE) - 1, (addr_t)guest_mem);
-
+ if (v3_add_shadow_mem(info, VGABIOS_START, vgabios_end, (addr_t)guest_mem) == -1) {
+ PrintError("Could not map VGABIOS\n");
+ return -1;
+ }
+
PrintDebug("Adding Shadow Region (0x%p-0x%p) -> 0x%p\n",
(void *)VGABIOS_START,
- (void *)VGABIOS_START + (num_pages * PAGE_SIZE),
+ (void *)vgabios_end,
(void *)guest_mem);
- }
- //
- v3_add_shadow_mem(info, 0x0, 0x9ffff, (addr_t)V3_AllocPages(160));
-
- if (1) {
- v3_add_shadow_mem(info, 0xa0000, 0xbffff, 0xa0000);
- } else {
- v3_hook_write_mem(info, 0xa0000, 0xbffff, 0xa0000, passthrough_mem_write, NULL);
- }
-
- // TEMP
- //add_shadow_region_passthrough(info, 0xc0000, 0xc8000, 0xc0000);
-
- if (1) {
- v3_add_shadow_mem(info, 0xc7000, 0xc8000, (addr_t)V3_AllocPages(1));
- if (v3_add_shadow_mem(info, 0xc8000, 0xf0000, (addr_t)V3_AllocPages(40)) == -1) {
- PrintDebug("Error adding shadow region\n");
+
+ // Fill in the space between the VGABIOS and the ROMBIOS
+ // We'll just back this to shadow memory for now....
+ if (v3_add_shadow_mem(info, vgabios_end, ROMBIOS_START,
+ (addr_t)V3_AllocPages((ROMBIOS_START - vgabios_end) / PAGE_SIZE)) == -1) {
+ PrintError("Could not map VGABIOS->ROMBIOS gap\n");
+ return -1;
}
- } else {
- v3_add_shadow_mem(info, 0xc0000, 0xc8000, 0xc0000);
- v3_add_shadow_mem(info, 0xc8000, 0xf0000, 0xc8000);
}
-
-
- if (1) {
- v3_add_shadow_mem(info, 0x100000, 0x1000000, (addr_t)V3_AllocPages(4096));
- } else {
- /* MEMORY HOOK TEST */
- v3_add_shadow_mem(info, 0x100000, 0xa00000, (addr_t)V3_AllocPages(2304));
- v3_hook_write_mem(info, 0xa00000, 0xa01000, (addr_t)V3_AllocPages(1), passthrough_mem_write, NULL);
- v3_add_shadow_mem(info, 0xa01000, 0x1000000, (addr_t)V3_AllocPages(1791));
+
+ /* layout rombios */
+ {
+ uint_t num_pages = (config_ptr->rombios_size + PAGE_SIZE - 1) / PAGE_SIZE;
+ void * guest_mem = V3_AllocPages(num_pages);
+ addr_t rombios_end = ROMBIOS_START + (num_pages * PAGE_SIZE);
+
+ PrintDebug("Layout Region %d bytes\n", config_ptr->rombios_size);
+ memcpy(V3_VAddr(guest_mem), config_ptr->rombios, config_ptr->rombios_size);
+
+ if (v3_add_shadow_mem(info, ROMBIOS_START, rombios_end, (addr_t)guest_mem) == -1) {
+ PrintError("Could not map ROMBIOS\n");
+ return -1;
+ }
+
+ PrintDebug("Adding Shadow Region (0x%p-0x%p) -> 0x%p\n",
+ (void *)ROMBIOS_START,
+ (void *)rombios_end,
+ (void *)guest_mem);
+
+ if (rombios_end != 0x100000) {
+ PrintError("ROMBIOS must reach the 1MB barrier....\n");
+ return -1;
+ }
}
- v3_add_shadow_mem(info, 0x1000000, 0x8000000, (addr_t)V3_AllocPages(32768));
-
- // test - give linux accesss to PCI space - PAD
- //v3_add_shadow_mem(info, 0xc0000000,0xffffffff,0xc0000000);
-
+
+
+ // Fill in the extended memory map....
+ {
+ int num_ext_pages = mem_pages - (0x100000 / PAGE_SIZE);
+
+ if (num_ext_pages > 0) {
+ if (v3_add_shadow_mem(info, 0x100000, info->mem_size, (addr_t)V3_AllocPages(num_ext_pages)) == -1) {
+ PrintError("Could not allocate extended shadow memory\n");
+ return -1;
+ }
+ }
+ }
print_shadow_map(info);
