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atirage: add video RAM.

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This commit is contained in:
Maxim Poliakovski 2020-05-28 23:47:20 +02:00
parent 55a14ca28f
commit 07340d82dd
2 changed files with 47 additions and 15 deletions
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54
devices/atirage.cpp
View File

@ -30,15 +30,26 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
ATIRage::ATIRage(uint16_t dev_id) : PCIDevice("ati-rage")
{
this->vram_size = 0x200000; /* FIXME: hardcoded VRAM size! */
/*allocate video RAM */
this->vram_ptr = new uint8_t[this->vram_size];
/* configure PCI parameters */
WRITE_DWORD_BE_A(&this->pci_cfg[0], (dev_id << 16) | ATI_PCI_VENDOR_ID);
WRITE_DWORD_BE_A(&this->pci_cfg[8], 0x0300005C);
WRITE_DWORD_BE_A(&this->pci_cfg[0x3C], 0x00080100);
/* initialize display identification */
this->disp_id = new DisplayID();
}
ATIRage::~ATIRage()
{
if (this->vram_ptr) {
delete this->vram_ptr;
}
delete (this->disp_id);
}
@ -106,6 +117,9 @@ const char* ATIRage::get_reg_name(uint32_t reg_offset)
case ATI_DSP_ON_OFF:
reg_name = "DSP_ON_OFF";
break;
case ATI_MEM_BUF_CNTL:
reg_name = "MEM_BUF_CNTL";
break;
case ATI_MEM_ADDR_CFG:
reg_name = "MEM_ADDR_CFG";
break;
@ -133,6 +147,9 @@ const char* ATIRage::get_reg_name(uint32_t reg_offset)
case ATI_MEM_CNTL:
reg_name = "MEM_CNTL";
break;
case ATI_DAC_REGS:
reg_name = "DAC_REGS";
break;
case ATI_DAC_CNTL:
reg_name = "DAC_CNTL";
break;
@ -299,34 +316,45 @@ bool ATIRage::pci_io_write(uint32_t offset, uint32_t value, uint32_t size)
uint32_t ATIRage::read(uint32_t reg_start, uint32_t offset, int size)
{
LOG_F(INFO, "Reading ATI Rage PCI memory: region=%X, offset=%X, size %d", reg_start, offset, size);
//LOG_F(INFO, "Reading ATI Rage PCI memory: region=%X, offset=%X, size %d", reg_start, offset, size);
if (reg_start < this->aperture_base || offset > 0x01000000) {
LOG_F(WARNING, "ATI Rage address out of range!");
LOG_F(WARNING, "ATI Rage: attempt to read outside the aperture!");
return 0;
}
if (offset < 0x7FFC00UL) {
LOG_F(WARNING, "ATI Rage frame buffer reads not supported yet!");
return 0;
if (offset < this->vram_size) {
/* read from little-endian VRAM region */
return size_dep_read(this->vram_ptr + offset, size);
}
else if (offset >= 0x7FFC00UL) {
/* read from memory-mapped registers */
return this->read_reg(offset - 0x7FFC00UL, size);
}
else {
LOG_F(WARNING, "ATI Rage: read attempt from unmapped aperture region at 0x%08X", offset);
}
return this->read_reg(offset - 0x7FFC00UL, size);
return 0;
}
void ATIRage::write(uint32_t reg_start, uint32_t offset, uint32_t value, int size)
{
LOG_F(INFO, "Writing reg=%X, offset=%X, value=%X, size %d", reg_start, offset, value, size);
//LOG_F(INFO, "Writing reg=%X, offset=%X, value=%X, size %d", reg_start, offset, value, size);
if (reg_start < this->aperture_base || offset > 0x01000000) {
LOG_F(WARNING, "ATI Rage address out of range!");
LOG_F(WARNING, "ATI Rage: attempt to write outside the aperture!");
return;
}
if (offset < 0x7FFC00UL) {
LOG_F(WARNING, "ATI Rage frame buffer writes not supported yet!");
return;
if (offset < this->vram_size) {
/* write to little-endian VRAM region */
size_dep_write(this->vram_ptr + offset, value, size);
} else if (offset >= 0x7FFC00UL) {
/* write to memory-mapped registers */
this->write_reg(offset - 0x7FFC00UL, value, size);
}
else {
LOG_F(WARNING, "ATI Rage: write attempt to unmapped aperture region at 0x%08X", offset);
}
this->write_reg(offset - 0x7FFC00UL, value, size);
}

8
devices/atirage.h
View File

@ -142,8 +142,12 @@ private:
uint8_t pci_cfg[256] = { 0 }; /* PCI configuration space */
uint32_t aperture_base;
/* Video RAM variables */
uint32_t vram_size;
uint8_t* vram_ptr;
DisplayID* disp_id;
uint32_t aperture_base;
DisplayID* disp_id;
};
#endif /* ATI_RAGE_H */