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PCI IDE check if BAR is IO

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This commit is contained in:
Kamil Kowalczyk
2026-03-10 22:15:24 +01:00
parent 37ec117abc
commit 47ea9eb632
1 changed files with 28 additions and 4 deletions
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32
kernel/device/pci_ide.c
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@@ -54,6 +54,14 @@ static void ide_make_device (struct ide_probe probe) {
} }
bool pci_ide_init (struct pci_info pci_info) { bool pci_ide_init (struct pci_info pci_info) {
uint16_t pci_cmd = pci_read16 (pci_info.bus, pci_info.slot, pci_info.func, PCI_COMMAND);
uint16_t new_cmd = pci_cmd | (1 << 0);
if (pci_cmd != new_cmd) {
pci_write16 (pci_info.bus, pci_info.slot, pci_info.func, PCI_COMMAND, new_cmd);
}
struct ide_probe probe; struct ide_probe probe;
uint8_t progif = pci_read8 (pci_info.bus, pci_info.slot, pci_info.func, PCI_PROG_IF); uint8_t progif = pci_read8 (pci_info.bus, pci_info.slot, pci_info.func, PCI_PROG_IF);
@@ -62,8 +70,16 @@ bool pci_ide_init (struct pci_info pci_info) {
uint16_t pcmd, pctrl, scmd, sctrl; uint16_t pcmd, pctrl, scmd, sctrl;
if ((progif & 0x01)) { if ((progif & 0x01)) {
pcmd = (uint16_t)(pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR0) & 0xFFFC); uint32_t bar0 = pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR0);
pctrl = (uint16_t)(pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR1) & 0xFFFC); uint32_t bar1 = pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR1);
if (!(bar0 & PCI_BAR_IO) || !(bar1 & PCI_BAR_IO)) {
DEBUG ("Non IO BARs not supported\n");
return false;
}
pcmd = (uint16_t)(bar0 & 0xFFFC);
pctrl = (uint16_t)(bar1 & 0xFFFC);
if (pctrl) if (pctrl)
pctrl += 2; pctrl += 2;
@@ -73,8 +89,16 @@ bool pci_ide_init (struct pci_info pci_info) {
} }
if ((progif & 0x04)) { if ((progif & 0x04)) {
scmd = (uint16_t)(pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR2) & 0xFFFC); uint32_t bar2 = pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR2);
sctrl = (uint16_t)(pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR3) & 0xFFFC); uint32_t bar3 = pci_read32 (pci_info.bus, pci_info.slot, pci_info.func, PCI_BAR3);
if (!(bar2 & PCI_BAR_IO) || !(bar3 & PCI_BAR_IO)) {
DEBUG ("Non IO BARs not supported\n");
return false;
}
scmd = (uint16_t)(bar2 & 0xFFFC);
sctrl = (uint16_t)(bar3 & 0xFFFC);
if (sctrl) if (sctrl)
sctrl += 2; sctrl += 2;