pci.c

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#include "./pci.h"
#include <ioforge/ioforge.h>
#include <ioforge/ioforge_pci.h>
#include <libk/io.h>
#include <libk/serial.h>
 
#define PCI_COMMAND 0XCF8
#define PCI_DATA 0xCFC
 
static uint32_t
pci_readl(uint8_t bus, uint8_t device, uint8_t func, uint8_t offset) {
    uint32_t address;
    uint32_t tmp = 0;
    address = (uint32_t) (((uint32_t) bus << 16) | ((uint32_t) device << 11)
                  | ((uint32_t) func << 8) | (offset & 0xFC)
                  | ((uint32_t) 0x80000000));
    outl(PCI_COMMAND, address);
    tmp = inl(PCI_DATA);
    return tmp;
}
 
static void pci_writel(uint8_t bus, uint8_t device, uint8_t func,
               uint8_t offset, uint32_t value) {
    uint32_t address;
    address = (uint32_t) (((uint32_t) bus << 16) | ((uint32_t) device << 11)
                  | ((uint32_t) func << 8) | (offset & 0xFC)
                  | ((uint32_t) 0x80000000));
    outl(PCI_COMMAND, address);
    outl(PCI_DATA, value);
}
 
uint32_t legacy_read32(uintptr_t base, uint8_t bus, uint8_t dev, uint8_t func,
               uint16_t offset) {
    (void) base;
    return pci_readl(bus, dev, func, (uint8_t) offset); /* existing impl */
}
 
void legacy_write32(uintptr_t base, uint8_t bus, uint8_t dev, uint8_t func,
            uint16_t offset, uint32_t val) {
    (void) base;
    pci_writel(bus, dev, func, (uint8_t) offset, val);
}
 
// static struct buddy_allocator *pci_allocator;
 
// uint16_t pci_readw(uint8_t bus, uint8_t device, uint8_t func, uint8_t offset) {
//  uint32_t address;
//  uint16_t tmp = 0;
//  address = (uint32_t) (((uint32_t) bus << 16) | ((uint32_t) device << 11)
//                | ((uint32_t) func << 8) | (offset & 0xFC)
//                | ((uint32_t) 0x80000000));
 
//  outl(PCI_COMMAND, address);
//  tmp = (uint16_t) ((inl(PCI_DATA) >> ((offset & 2) * 8)) & 0xFFFF);
//  return tmp;
// }
// uint8_t pci_readb(uint8_t bus, uint8_t device, uint8_t func, uint8_t offset) {
//  uint32_t address = (0x80000000U | (bus << 16) | (device << 11)
//              | (func << 8) | (offset & 0xFC));
//  outl(PCI_COMMAND, address);
//  uint32_t data = inl(PCI_DATA);
//  return (uint8_t) ((data >> ((offset & 3) * 8)) & 0xFF);
// }
// void pci_writew(uint8_t bus, uint8_t device, uint8_t func, uint8_t offset,
//      uint16_t value) {
//  uint32_t address = 0x80000000 | (bus << 16) | (device << 11)
//             | (func << 8) | (offset & 0xFC);
//  outl(0xCF8, address);
//  if (offset & 2)
//      outw(0xCFC + 2, value); // upper 16-bit
//  else
//      outw(0xCFC, value); // lower 16-bit
// }
 
// void pci_write_command(uint8_t bus, uint8_t dev, uint8_t func, uint16_t value) {
//  uint32_t address =
//      0x80000000 | (bus << 16) | (dev << 11) | (func << 8) | 0x04;
 
//  outl(0xCF8, address);
 
//  uint32_t data = inl(0xCFC);
//  data = (data & 0xFFFF0000) | value;
//  outl(0xCFC, data);
// }