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MPC106: use common PCI configuration code.

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This commit is contained in:
Maxim Poliakovski 2022-03-13 22:22:53 +01:00
parent e47b66e1af
commit 574677490f
1 changed files with 25 additions and 8 deletions
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33
devices/memctrl/mpc106.cpp
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@ -33,17 +33,25 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <loguru.hpp>
MPC106::MPC106() : MemCtrlBase(), PCIDevice("Grackle PCI host bridge"), PCIHost()
MPC106::MPC106() : MemCtrlBase(), PCIDevice("Grackle"), PCIHost()
{
this->name = "Grackle";
supports_types(HWCompType::MEM_CTRL | HWCompType::MMIO_DEV |
HWCompType::PCI_HOST | HWCompType::PCI_DEV);
/* add PCI/ISA I/O space, 64K for now */
// populate PCI config header
this->vendor_id = PCI_VENDOR_MOTOROLA;
this->device_id = 0x0002;
this->class_rev = 0x06000040;
this->cache_ln_sz = 8;
this->command = 6;
this->status = 0x80;
// add PCI/ISA I/O space, 64K for now
add_mmio_region(0xFE000000, 0x10000, this);
/* add memory mapped I/O region for MPC106 registers */
// add memory mapped I/O region for MPC106 registers
add_mmio_region(0xFEC00000, 0x300000, this);
}
@ -51,8 +59,8 @@ uint32_t MPC106::read(uint32_t reg_start, uint32_t offset, int size) {
uint32_t result;
if (reg_start == 0xFE000000) {
/* broadcast I/O request to devices that support I/O space
until a device returns true that means "request accepted" */
// broadcast I/O request to devices that support I/O space
// until a device returns true that means "request accepted"
for (auto& dev : this->io_space_devs) {
if (dev->pci_io_read(offset, size, &result)) {
return result;
@ -66,15 +74,15 @@ uint32_t MPC106::read(uint32_t reg_start, uint32_t offset, int size) {
}
}
/* FIXME: reading from CONFIG_ADDR is ignored for now */
// FIXME: reading from CONFIG_ADDR is ignored for now
return 0;
}
void MPC106::write(uint32_t reg_start, uint32_t offset, uint32_t value, int size) {
if (reg_start == 0xFE000000) {
/* broadcast I/O request to devices that support I/O space
until a device returns true that means "request accepted" */
// broadcast I/O request to devices that support I/O space
// until a device returns true that means "request accepted"
for (auto& dev : this->io_space_devs) {
if (dev->pci_io_write(offset, value, size)) {
return;
@ -163,6 +171,10 @@ uint32_t MPC106::pci_cfg_read(uint32_t reg_offs, uint32_t size) {
LOG_F(9, "read from Grackle register %08X\n", reg_offs);
#endif
if (reg_offs < 64) {
return PCIDevice::pci_cfg_read(reg_offs, size);
}
return read_mem(&this->my_pci_cfg_hdr[reg_offs], size);
}
@ -171,6 +183,11 @@ void MPC106::pci_cfg_write(uint32_t reg_offs, uint32_t value, uint32_t size) {
LOG_F(9, "write %08X to Grackle register %08X\n", value, reg_offs);
#endif
if (reg_offs < 64) {
PCIDevice::pci_cfg_write(reg_offs, value, size);
return;
}
// FIXME: implement write-protection for read-only registers
write_mem(&this->my_pci_cfg_hdr[reg_offs], value, size);