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-rw-r--r--arch/i386/pci/Makefile2
-rw-r--r--arch/i386/pci/early.c44
-rw-r--r--arch/x86_64/pci/Makefile3
-rw-r--r--include/asm-x86_64/pci-direct.h42
4 files changed, 51 insertions, 40 deletions
diff --git a/arch/i386/pci/Makefile b/arch/i386/pci/Makefile
index 62ad75c57e6a..1594d2f55c8f 100644
--- a/arch/i386/pci/Makefile
+++ b/arch/i386/pci/Makefile
@@ -11,4 +11,4 @@ pci-y += legacy.o irq.o
11pci-$(CONFIG_X86_VISWS) := visws.o fixup.o 11pci-$(CONFIG_X86_VISWS) := visws.o fixup.o
12pci-$(CONFIG_X86_NUMAQ) := numa.o irq.o 12pci-$(CONFIG_X86_NUMAQ) := numa.o irq.o
13 13
14obj-y += $(pci-y) common.o 14obj-y += $(pci-y) common.o early.o
diff --git a/arch/i386/pci/early.c b/arch/i386/pci/early.c
new file mode 100644
index 000000000000..b1f7f40d809b
--- /dev/null
+++ b/arch/i386/pci/early.c
@@ -0,0 +1,44 @@
1#include <linux/kernel.h>
2#include <asm/pci-direct.h>
3#include <asm/io.h>
4
5/* Direct PCI access. This is used for PCI accesses in early boot before
6 the PCI subsystem works. */
7
8#define PDprintk(x...)
9
10u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset)
11{
12 u32 v;
13 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
14 v = inl(0xcfc);
15 if (v != 0xffffffff)
16 PDprintk("%x reading 4 from %x: %x\n", slot, offset, v);
17 return v;
18}
19
20u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset)
21{
22 u8 v;
23 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
24 v = inb(0xcfc + (offset&3));
25 PDprintk("%x reading 1 from %x: %x\n", slot, offset, v);
26 return v;
27}
28
29u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset)
30{
31 u16 v;
32 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
33 v = inw(0xcfc + (offset&2));
34 PDprintk("%x reading 2 from %x: %x\n", slot, offset, v);
35 return v;
36}
37
38void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset,
39 u32 val)
40{
41 PDprintk("%x writing to %x: %x\n", slot, offset, val);
42 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
43 outl(val, 0xcfc);
44}
diff --git a/arch/x86_64/pci/Makefile b/arch/x86_64/pci/Makefile
index a3f6ad570179..1eb18f421edf 100644
--- a/arch/x86_64/pci/Makefile
+++ b/arch/x86_64/pci/Makefile
@@ -9,7 +9,7 @@ obj-y := i386.o
9obj-$(CONFIG_PCI_DIRECT)+= direct.o 9obj-$(CONFIG_PCI_DIRECT)+= direct.o
10obj-y += fixup.o init.o 10obj-y += fixup.o init.o
11obj-$(CONFIG_ACPI) += acpi.o 11obj-$(CONFIG_ACPI) += acpi.o
12obj-y += legacy.o irq.o common.o 12obj-y += legacy.o irq.o common.o early.o
13# mmconfig has a 64bit special 13# mmconfig has a 64bit special
14obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o direct.o 14obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o direct.o
15 15
@@ -23,3 +23,4 @@ common-y += ../../i386/pci/common.o
23fixup-y += ../../i386/pci/fixup.o 23fixup-y += ../../i386/pci/fixup.o
24i386-y += ../../i386/pci/i386.o 24i386-y += ../../i386/pci/i386.o
25init-y += ../../i386/pci/init.o 25init-y += ../../i386/pci/init.o
26early-y += ../../i386/pci/early.o
diff --git a/include/asm-x86_64/pci-direct.h b/include/asm-x86_64/pci-direct.h
index 036b6ca5b53b..9d916cdaa18e 100644
--- a/include/asm-x86_64/pci-direct.h
+++ b/include/asm-x86_64/pci-direct.h
@@ -2,47 +2,13 @@
2#define ASM_PCI_DIRECT_H 1 2#define ASM_PCI_DIRECT_H 1
3 3
4#include <linux/types.h> 4#include <linux/types.h>
5#include <asm/io.h>
6 5
7/* Direct PCI access. This is used for PCI accesses in early boot before 6/* Direct PCI access. This is used for PCI accesses in early boot before
8 the PCI subsystem works. */ 7 the PCI subsystem works. */
9 8
10#define PDprintk(x...) 9extern u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset);
11 10extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset);
12static inline u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset) 11extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset);
13{ 12extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val);
14 u32 v;
15 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
16 v = inl(0xcfc);
17 if (v != 0xffffffff)
18 PDprintk("%x reading 4 from %x: %x\n", slot, offset, v);
19 return v;
20}
21
22static inline u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset)
23{
24 u8 v;
25 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
26 v = inb(0xcfc + (offset&3));
27 PDprintk("%x reading 1 from %x: %x\n", slot, offset, v);
28 return v;
29}
30
31static inline u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset)
32{
33 u16 v;
34 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
35 v = inw(0xcfc + (offset&2));
36 PDprintk("%x reading 2 from %x: %x\n", slot, offset, v);
37 return v;
38}
39
40static inline void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset,
41 u32 val)
42{
43 PDprintk("%x writing to %x: %x\n", slot, offset, val);
44 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
45 outl(val, 0xcfc);
46}
47 13
48#endif 14#endif