diff options
Diffstat (limited to 'src/devices/oprom/yabel/device.c')
| -rw-r--r-- | src/devices/oprom/yabel/device.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/src/devices/oprom/yabel/device.c b/src/devices/oprom/yabel/device.c index b48f1d6dee..dd078c72c6 100644 --- a/src/devices/oprom/yabel/device.c +++ b/src/devices/oprom/yabel/device.c @@ -24,8 +24,8 @@ /* the device we are working with... */ biosemu_device_t bios_device; -//max. 6 BARs and 1 Exp.ROM plus CfgSpace and 3 legacy ranges -translate_address_t translate_address_array[11]; +//max. 6 BARs and 1 Exp.ROM plus CfgSpace and 3 legacy ranges, plus 2 "special" memory ranges +translate_address_t translate_address_array[13]; u8 taa_last_entry; typedef struct { @@ -209,6 +209,23 @@ biosemu_dev_get_addr_info(void) } #endif +// "special memory" is a hack to make some parts of memory fall through to real memory +// (ie. no translation). Necessary if option ROMs attempt DMA there, map registers or +// do similarily crazy things. +void +biosemu_add_special_memory(u32 start, u32 size) +{ + int taa_index = ++taa_last_entry; + translate_address_array[taa_index].info = IORESOURCE_FIXED | IORESOURCE_MEM; + translate_address_array[taa_index].bus = 0; + translate_address_array[taa_index].devfn = 0; + translate_address_array[taa_index].cfg_space_offset = 0; + translate_address_array[taa_index].address = start; + translate_address_array[taa_index].size = size; + /* dont translate addresses... all addresses are 1:1 */ + translate_address_array[taa_index].address_offset = 0; +} + #ifndef CONFIG_PCI_OPTION_ROM_RUN_YABEL // to simulate accesses to legacy VGA Memory (0xA0000-0xBFFFF) // we look for the first prefetchable memory BAR, if no prefetchable BAR found, @@ -419,7 +436,7 @@ biosemu_dev_init(struct device * device) // and accessing client interface for every translation... // returns: 0 if addr not found in translate_address_array, 1 if found. u8 -biosemu_dev_translate_address(unsigned long * addr) +biosemu_dev_translate_address(int type, unsigned long * addr) { int i = 0; translate_address_t ta; @@ -443,7 +460,7 @@ biosemu_dev_translate_address(unsigned long * addr) #endif for (i = 0; i <= taa_last_entry; i++) { ta = translate_address_array[i]; - if ((*addr >= ta.address) && (*addr <= (ta.address + ta.size))) { + if ((*addr >= ta.address) && (*addr <= (ta.address + ta.size)) && (ta.info & type)) { *addr += ta.address_offset; return 1; } |