added pci bios and irq router files

renamed io and configuration functions
implemented configuration mechanisms


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4727 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/bus_managers/pci/arch/x86/Jamfile

@@ -0,0 +1,8 @@
+SubDir OBOS_TOP src add-ons kernel bus_managers pci arch x86 ;
+
+KernelStaticLibrary pci_arch_x86_bus_manager :
+	bios.c
+	pci_config.c
+	pci_io.c
+	pci_irq.c
+;

src/add-ons/kernel/bus_managers/pci/arch/x86/bios.c

@@ -0,0 +1,27 @@
+#include "pci_priv.h"
+#include "bios.h"
+
+void
+pci_bios_init(void)
+{
+}
+
+
+bool
+pci_bios_available(void)
+{
+	return false;
+}
+
+
+uint32
+pci_bios_read_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size)
+{
+	return 0;
+}
+
+
+void
+pci_bios_write_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32 value)
+{
+}

src/add-ons/kernel/bus_managers/pci/arch/x86/bios.h

@@ -0,0 +1,7 @@
+
+void pci_bios_init(void);
+
+bool pci_bios_available(void);
+
+uint32 pci_bios_read_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size);
+void pci_bios_write_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32 value);

src/add-ons/kernel/bus_managers/pci/arch/x86/pci_config.c

@@ -1,20 +1,248 @@
+#include <KernelExport.h>
 #include "pci_priv.h"
+#include "bios.h"
+#include "arch_cpu.h"
+
+static uint32 (*gReadConfigFunc)(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size);
+static void (*gWriteConfigFunc)(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32 value);
+
+int	gMaxBusDevices;
+
+status_t detect_config_mechanism(void);
+bool pci_config_access_ok(void);
+uint32 pci_mech1_read_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size);
+void pci_mech1_write_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32 value);
+uint32 pci_mech2_read_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size);
+void pci_mech2_write_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32 value);
+
+
+#define PCI_MECH1_REQ_PORT				0xCF8
+#define PCI_MECH1_DATA_PORT 			0xCFC
+#define PCI_MECH1_REQ_DATA(bus, device, func, offset) \
+	(0x80000000 | (bus << 16) | (device << 11) | (func << 8) | (offset & ~3))
+
+#define PCI_MECH2_ENABLE_PORT			0x0cf8
+#define PCI_MECH2_FORWARD_PORT			0x0cfa
+#define PCI_MECH2_CONFIG_PORT(dev, offset) \
+	(uint16)(0xC00 | (dev << 8) | offset)
+
 
 status_t
-pci_config_init()
+pci_config_init(void)
 {
+	pci_bios_init();
+	
+	if (B_OK != detect_config_mechanism()) {
+		dprintf("PCI: failed to detect configuration mechanism\n");
+		return B_ERROR;
+	}
+
 	return B_OK;
 }
 
 
-uint32
+status_t
-read_pci_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size)
+detect_config_mechanism(void)
 {
-	return 0;
+	// PCI configuration mechanism 1 is the preferred one.
+	// If it doesn't work, try mechanism 2.
+	// Finally, try to fallback to PCI BIOS
+
+	if (1) {
+		// check for mechanism 1
+		out32(0x80000000, PCI_MECH1_REQ_PORT);
+		if (0x80000000 == in32(PCI_MECH1_REQ_PORT)) {
+			dprintf("PCI: mechanism 1 found\n");
+			gMaxBusDevices = 32;
+			gReadConfigFunc = pci_mech1_read_config;
+			gWriteConfigFunc = pci_mech1_write_config;
+			if (pci_config_access_ok()) {
+				dprintf("PCI: using mechanism 1\n");
+				return B_OK;
+			}
+		}
+	}
+
+	if (1) {
+		// check for mechanism 2
+		out8(0x00, 0xCFB);
+		out8(0x00, 0xCF8);
+		out8(0x00, 0xCFA);
+		if (in8(0xCF8) == 0x00 && in8(0xCFA) == 0x00) {
+			dprintf("PCI: mechanism 2 found\n");
+			gMaxBusDevices = 16;
+			gReadConfigFunc = pci_mech2_read_config;
+			gWriteConfigFunc = pci_mech2_write_config;
+			if (pci_config_access_ok()) {
+				dprintf("PCI: using mechanism 2\n");
+				return B_OK;
+			}
+		}
+	}
+
+	if (1) {
+		// check for PCI BIOS
+		if (pci_bios_available()) {
+			gReadConfigFunc = pci_bios_read_config;
+			gWriteConfigFunc = pci_bios_write_config;
+			gMaxBusDevices = 32;
+			if (pci_config_access_ok()) {
+				dprintf("PCI: using PCI BIOS\n");
+				return B_OK;
+			}
+		}
+	}
+	
+	dprintf("PCI: no configuration mechanism found\n");
+	return B_ERROR;
+}
+
+
+bool
+pci_config_access_ok(void)
+{
+	return true;
+}
+
+
+uint32
+pci_read_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size)
+{
+	return gReadConfigFunc(bus, device, function, offset, size);
 }
 
 
 void
-write_pci_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32	value)
+pci_write_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32 value)
+{
+	gWriteConfigFunc(bus, device, function, offset, size, value);
+}
+
+
+uint8
+pci_read_irq(uint8 bus, uint8 device, uint8 function, uint8 line)
 {
 }
+
+
+void
+pci_write_irq(uint8 bus, uint8 device, uint8 function, uint8 line, uint8 irq)
+{
+}
+
+
+uint32
+pci_mech1_read_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size)
+{
+	uint32 result;
+	if (device > 31 || function > 7 || (size != 1 && size != 2 && size != 4)
+		|| (size == 2 && (offset & 3) == 3) || (size == 4 && (offset & 3) != 0)) {
+		dprintf("PCI: mech1 can't read config for bus %u, device %u, function %u, offset %u, size %u\n",
+			 bus, device, function, offset, size);
+		return 0xffffffff;
+	}
+	
+	out32(PCI_MECH1_REQ_DATA(bus, device, function, offset), PCI_MECH1_REQ_PORT);
+	switch (size) {
+		case 1:
+			result = in8(PCI_MECH1_DATA_PORT + (offset & 3));
+			break;
+		case 2:
+			result = in16(PCI_MECH1_DATA_PORT + (offset & 3));
+			break;
+		case 4:
+			result = in32(PCI_MECH1_DATA_PORT);
+			break;
+		default:
+			result = 0xffffffff;
+	}
+	return result;
+}
+
+
+void
+pci_mech1_write_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32 value)
+{
+	if (device > 31 || function > 7 || (size != 1 && size != 2 && size != 4)
+		|| (size == 2 && (offset & 3) == 3) || (size == 4 && (offset & 3) != 0)) {
+		dprintf("PCI: mech1 can't write config for bus %u, device %u, function %u, offset %u, size %u\n",
+			 bus, device, function, offset, size);
+		return;
+	}
+	
+	out32(PCI_MECH1_REQ_DATA(bus, device, function, offset), PCI_MECH1_REQ_PORT);
+	switch (size) {
+		case 1:
+			out8(value, PCI_MECH1_DATA_PORT + (offset & 3));
+		break;
+		case 2:
+			out16(value, PCI_MECH1_DATA_PORT + (offset & 3));
+			break;
+		case 4:
+			out32(value, PCI_MECH1_DATA_PORT);
+			break;
+	}
+}
+
+
+uint32
+pci_mech2_read_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size)
+{
+	uint32 result;
+	if (device > 15 || function > 7 || (size != 1 && size != 2 && size != 4)) {
+		dprintf("PCI: mech2 can't read config for bus %u, device %u, function %u, offset %u, size %u\n",
+			 bus, device, function, offset, size);
+		return 0xffffffff;
+	}
+	
+	out8((uint8)(0xf0 | (function << 1)), PCI_MECH2_ENABLE_PORT);
+	out8(bus, PCI_MECH2_FORWARD_PORT);
+	switch (size) {
+		case 1:
+			result = in8(PCI_MECH2_CONFIG_PORT(device, offset));
+			break;
+		case 2:
+			result = in16(PCI_MECH2_CONFIG_PORT(device, offset));
+			break;
+		case 4:
+			result = in32(PCI_MECH2_CONFIG_PORT(device, offset));
+			break;
+		default:
+			result = 0xffffffff;
+	}
+	out8(0, PCI_MECH2_ENABLE_PORT);
+	return result;
+}
+
+
+void
+pci_mech2_write_config(uint8 bus, uint8 device, uint8 function, uint8 offset, uint8 size, uint32 value)
+{
+	if (device > 15 || function > 7 || (size != 1 && size != 2 && size != 4)) {
+		dprintf("PCI: mech2 can't write config for bus %u, device %u, function %u, offset %u, size %u\n",
+			 bus, device, function, offset, size);
+		return;
+	}
+
+	out8((uint8)(0xf0 | (function << 1)), PCI_MECH2_ENABLE_PORT);
+	out8(bus, PCI_MECH2_FORWARD_PORT);
+	switch (size) {
+		case 1:
+			out8(value, PCI_MECH2_CONFIG_PORT(device, offset));
+			break;
+		case 2:
+			out16(value, PCI_MECH2_CONFIG_PORT(device, offset));
+			break;
+		case 4:
+			out32(value, PCI_MECH2_CONFIG_PORT(device, offset));
+			break;
+	}
+	out8(0, PCI_MECH2_ENABLE_PORT);
+}
+
+
+void *
+pci_ram_address(const void *physical_address_in_system_memory)
+{
+	return 0;
+}

src/add-ons/kernel/bus_managers/pci/arch/x86/pci_io.c

@@ -1,53 +1,51 @@
 #include "pci_priv.h"
+#include "arch_cpu.h"
 
 status_t
 pci_io_init()
 {
+	// nothing to do on x86 hardware
 	return B_OK;
 }
 
 
 uint8
-read_io_8(int mapped_io_addr)
+pci_read_io_8(int mapped_io_addr)
 {
-	return 0;
+	return in8(mapped_io_addr);
 }
 
 
 void
-write_io_8(int mapped_io_addr, uint8 value)
+pci_write_io_8(int mapped_io_addr, uint8 value)
 {
+	out8(value, mapped_io_addr);
 }
 
 
 uint16
-read_io_16(int mapped_io_addr)
+pci_read_io_16(int mapped_io_addr)
 {
-	return 0;
+	return in16(mapped_io_addr);
 }
 
 
 void
-write_io_16(int mapped_io_addr, uint16 value)
+pci_write_io_16(int mapped_io_addr, uint16 value)
 {
+	out16(value, mapped_io_addr);
 }
 
 
 uint32
-read_io_32(int mapped_io_addr)
+pci_read_io_32(int mapped_io_addr)
 {
-	return 0;
+	return in32(mapped_io_addr);
 }
 
 
 void
-write_io_32(int mapped_io_addr, uint32 value)
+pci_write_io_32(int mapped_io_addr, uint32 value)
 {
-}
+	out32(value, mapped_io_addr);
-
-
-void *
-ram_address(const void *physical_address_in_system_memory)
-{
-	return 0;
 }

src/add-ons/kernel/bus_managers/pci/arch/x86/pci_irq.c

@@ -0,0 +1,20 @@
+#include "pci_priv.h"
+
+status_t
+pci_irq_init(void)
+{
+	return B_ERROR;
+}
+
+
+uint8
+pci_read_irq(uint8 bus, uint8 device, uint8 function, uint8 line)
+{
+	return 0;
+}
+
+
+void
+pci_write_irq(uint8 bus, uint8 device, uint8 function, uint8 line, uint8 irq)
+{
+}