diff options
Diffstat (limited to 'src/kernel/pci')
| -rw-r--r-- | src/kernel/pci/pci.c | 140 | ||||
| -rw-r--r-- | src/kernel/pci/pci.h | 108 |
2 files changed, 0 insertions, 248 deletions
diff --git a/src/kernel/pci/pci.c b/src/kernel/pci/pci.c deleted file mode 100644 index 6eca302..0000000 --- a/src/kernel/pci/pci.c +++ /dev/null @@ -1,140 +0,0 @@ -#include <io/io.h> -#include <lib/lib.h> -#include <pci/pci.h> -#include <stdint.h> -#include <system.h> - -void pci_write_field(u32 device, int field, u32 value) -{ - outl(PCI_ADDRESS_PORT, pci_get_addr(device, field)); - outl(PCI_VALUE_PORT, value); -} - -u32 pci_read_field(u32 device, int field, int size) -{ - outl(PCI_ADDRESS_PORT, pci_get_addr(device, field)); - - if (size == 4) { - u32 t = inl(PCI_VALUE_PORT); - return t; - } else if (size == 2) { - u16 t = inw((u16)(PCI_VALUE_PORT + (field & 2))); - return t; - } else if (size == 1) { - u8 t = inb((u16)(PCI_VALUE_PORT + (field & 3))); - return t; - } - return 0xFFFF; -} - -u16 pci_find_type(u32 dev) -{ - return (u16)((pci_read_field(dev, PCI_CLASS, 1) << 8) | - pci_read_field(dev, PCI_SUBCLASS, 1)); -} - -void pci_scan_hit(pci_func_t f, u32 dev, void *extra) -{ - int dev_vend = (int)pci_read_field(dev, PCI_VENDOR_ID, 2); - int dev_dvid = (int)pci_read_field(dev, PCI_DEVICE_ID, 2); - - f(dev, (u16)dev_vend, (u16)dev_dvid, extra); -} - -void pci_scan_func(pci_func_t f, int type, int bus, int slot, int func, void *extra) -{ - u32 dev = pci_box_device(bus, slot, func); - if (type == -1 || type == pci_find_type(dev)) - pci_scan_hit(f, dev, extra); - if (pci_find_type(dev) == PCI_TYPE_BRIDGE) - pci_scan_bus(f, type, (int)pci_read_field(dev, PCI_SECONDARY_BUS, 1), extra); -} - -void pci_scan_slot(pci_func_t f, int type, int bus, int slot, void *extra) -{ - u32 dev = pci_box_device(bus, slot, 0); - if (pci_read_field(dev, PCI_VENDOR_ID, 2) == PCI_NONE) - return; - pci_scan_func(f, type, bus, slot, 0, extra); - if (!pci_read_field(dev, PCI_HEADER_TYPE, 1)) - return; - for (int func = 1; func < 8; func++) { - dev = pci_box_device(bus, slot, func); - if (pci_read_field(dev, PCI_VENDOR_ID, 2) != PCI_NONE) - pci_scan_func(f, type, bus, slot, func, extra); - } -} - -void pci_scan_bus(pci_func_t f, int type, int bus, void *extra) -{ - for (int slot = 0; slot < 32; ++slot) - pci_scan_slot(f, type, bus, slot, extra); -} - -void pci_scan(pci_func_t f, int type, void *extra) -{ - if ((pci_read_field(0, PCI_HEADER_TYPE, 1) & 0x80) == 0) { - pci_scan_bus(f, type, 0, extra); - return; - } - - for (int func = 0; func < 8; ++func) { - u32 dev = pci_box_device(0, 0, func); - if (pci_read_field(dev, PCI_VENDOR_ID, 2) != PCI_NONE) - pci_scan_bus(f, type, func, extra); - else - break; - } -} - -static void find_isa_bridge(u32 device, u16 vendor_id, u16 device_id, void *extra) -{ - if (vendor_id == 0x8086 && (device_id == 0x7000 || device_id == 0x7110)) - *((u32 *)extra) = device; -} - -static u32 pci_isa = 0; -static u8 pci_remaps[4] = { 0 }; - -void pci_remap() -{ - pci_scan(&find_isa_bridge, -1, &pci_isa); - if (pci_isa) { - for (int i = 0; i < 4; ++i) { - pci_remaps[i] = (u8)pci_read_field(pci_isa, 0x60 + i, 1); - if (pci_remaps[i] == 0x80) { - pci_remaps[i] = (u8)(10 + (i % 1)); - } - } - u32 out = 0; - memcpy(&out, &pci_remaps, 4); - pci_write_field(pci_isa, 0x60, out); - } -} - -int pci_get_interrupt(u32 device) -{ - if (pci_isa) { - u32 irq_pin = pci_read_field(device, 0x3D, 1); - if (irq_pin == 0) - return (int)pci_read_field(device, PCI_INTERRUPT_LINE, 1); - int pirq = (int)(irq_pin + pci_extract_slot(device) - 2) % 4; - int int_line = (int)pci_read_field(device, PCI_INTERRUPT_LINE, 1); - - if (pci_remaps[pirq] >= 0x80) { - if (int_line == 0xFF) { - int_line = 10; - pci_write_field(device, PCI_INTERRUPT_LINE, (u32)int_line); - } - pci_remaps[pirq] = (u8)int_line; - u32 out = 0; - memcpy(&out, &pci_remaps, 4); - pci_write_field(pci_isa, 0x60, out); - return int_line; - } - pci_write_field(device, PCI_INTERRUPT_LINE, pci_remaps[pirq]); - return pci_remaps[pirq]; - } else { - return (int)pci_read_field(device, PCI_INTERRUPT_LINE, 1); - } -}
\ No newline at end of file diff --git a/src/kernel/pci/pci.h b/src/kernel/pci/pci.h deleted file mode 100644 index 369f2d2..0000000 --- a/src/kernel/pci/pci.h +++ /dev/null @@ -1,108 +0,0 @@ -#ifndef MELVIX_PCI_H -#define MELVIX_PCI_H - -#include <stdint.h> - -#define PCI_VENDOR_ID 0x00 // 2 -#define PCI_DEVICE_ID 0x02 // 2 -#define PCI_COMMAND 0x04 // 2 -#define PCI_STATUS 0x06 // 2 -#define PCI_REVISION_ID 0x08 // 1 - -#define PCI_PROG_IF 0x09 // 1 -#define PCI_SUBCLASS 0x0a // 1 -#define PCI_CLASS 0x0b // 1 -#define PCI_CACHE_LINE_SIZE 0x0c // 1 -#define PCI_LATENCY_TIMER 0x0d // 1 -#define PCI_HEADER_TYPE 0x0e // 1 -#define PCI_BIST 0x0f // 1 -#define PCI_BAR0 0x10 // 4 -#define PCI_BAR1 0x14 // 4 -#define PCI_BAR2 0x18 // 4 -#define PCI_BAR3 0x1C // 4 -#define PCI_BAR4 0x20 // 4 -#define PCI_BAR5 0x24 // 4 - -#define PCI_INTERRUPT_LINE 0x3C // 1 - -#define PCI_SECONDARY_BUS 0x19 // 1 - -#define PCI_HEADER_TYPE_DEVICE 0 -#define PCI_HEADER_TYPE_BRIDGE 1 -#define PCI_HEADER_TYPE_CARDBUS 2 - -#define PCI_TYPE_BRIDGE 0x0604 -#define PCI_TYPE_SATA 0x0106 - -#define PCI_ADDRESS_PORT 0xCF8 -#define PCI_VALUE_PORT 0xCFC - -#define PCI_NONE 0xFFFF - -typedef void (*pci_func_t)(u32 device, u16 vendor_id, u16 device_id, void *extra); - -struct pci_device_descriptor { - u32 port_base; - u32 interrupt; - - u8 bus; - u8 slot; - u8 function; - - u16 vendor_id; - u16 device_id; - - u8 class_id; - u8 subclass_id; - u8 interface_id; - - u8 revision; -}; - -static inline int pci_extract_bus(u32 device) -{ - return (u8)((device >> 16)); -} - -static inline int pci_extract_slot(u32 device) -{ - return (u8)((device >> 8)); -} - -static inline int pci_extract_func(u32 device) -{ - return (u8)(device); -} - -static inline u32 pci_get_addr(u32 device, int field) -{ - return 0x80000000 | (pci_extract_bus(device) << 16) | (pci_extract_slot(device) << 11) | - (pci_extract_func(device) << 8) | ((field)&0xFC); -} - -static inline u32 pci_box_device(int bus, int slot, int func) -{ - return (u32)((bus << 16) | (slot << 8) | func); -} - -u32 pci_read_field(u32 device, int field, int size); - -void pci_write_field(u32 device, int field, u32 value); - -u16 pci_find_type(u32 dev); - -void pci_scan_hit(pci_func_t f, u32 dev, void *extra); - -void pci_scan_func(pci_func_t f, int type, int bus, int slot, int func, void *extra); - -void pci_scan_slot(pci_func_t f, int type, int bus, int slot, void *extra); - -void pci_scan_bus(pci_func_t f, int type, int bus, void *extra); - -void pci_scan(pci_func_t f, int type, void *extra); - -void pci_remap(); - -int pci_get_interrupt(u32 device); - -#endif
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