feat: initial locking etc.

kernel/drivers/pci.h

@@ -6,6 +6,8 @@
 #define NEW_KERNEL_PCI_H
 
 #include <types.h>
+#include <stdbool.h>
+#include <attributes.h>
 
 #define PCI_CLASS_MASS_STORAGE 0x01
 
@@ -130,8 +132,47 @@ typedef struct pci_device {
     } driver_state;
 } pci_device;
 
+typedef union {
+    uint16_t value;
+    struct {
+        bool io_space: 1;
+        bool mem_space: 1;
+        bool bus_master: 1;
+        bool special_cycles: 1;
+        bool mem_write_invalidate_enable: 1;
+        bool vga_palette_snoop: 1;
+        bool parity_error_response: 1;
+        uint8_t reserved: 1;
+        bool serr_enable: 1;
+        bool fast_b2b_enable: 1;
+        bool interrupt_disable: 1;
+        uint8_t reserved2: 5;
+    } packed command;
+} pci_command_register_t;
+
+typedef union {
+    uint16_t value;
+    struct {
+        uint8_t reserved: 3;
+        bool interrupt_status: 1;
+        bool capabilities_list: 1;
+        bool speed_66mhz_capable: 1;
+        uint8_t reserved2: 1;
+        bool fast_b2b_capable: 1;
+        bool master_data_parity_error: 1;
+        uint8_t devsel_timing: 2;
+        bool signaled_target_abort: 1;
+        bool received_target_abort: 1;
+        bool received_master_abort: 1;
+        bool signaled_system_error: 1;
+        bool detected_parity_error: 1;
+    } packed status;
+} pci_status_register_t;
+
 void pci_print_info();
 
+void pci_dump_caps();
+
 uint32_t pci_register_driver(const pci_driver *pci_driver);
 
 void pci_sort_drivers();