diff options
| -rw-r--r-- | arch/i386/pci/Makefile | 2 | ||||
| -rw-r--r-- | arch/i386/pci/early.c | 44 | ||||
| -rw-r--r-- | arch/x86_64/pci/Makefile | 3 | ||||
| -rw-r--r-- | include/asm-x86_64/pci-direct.h | 42 |
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 | |||
| 11 | pci-$(CONFIG_X86_VISWS) := visws.o fixup.o | 11 | pci-$(CONFIG_X86_VISWS) := visws.o fixup.o |
| 12 | pci-$(CONFIG_X86_NUMAQ) := numa.o irq.o | 12 | pci-$(CONFIG_X86_NUMAQ) := numa.o irq.o |
| 13 | 13 | ||
| 14 | obj-y += $(pci-y) common.o | 14 | obj-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 | |||
| 10 | u32 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 | |||
| 20 | u8 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 | |||
| 29 | u16 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 | |||
| 38 | void 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 | |||
| 9 | obj-$(CONFIG_PCI_DIRECT)+= direct.o | 9 | obj-$(CONFIG_PCI_DIRECT)+= direct.o |
| 10 | obj-y += fixup.o init.o | 10 | obj-y += fixup.o init.o |
| 11 | obj-$(CONFIG_ACPI) += acpi.o | 11 | obj-$(CONFIG_ACPI) += acpi.o |
| 12 | obj-y += legacy.o irq.o common.o | 12 | obj-y += legacy.o irq.o common.o early.o |
| 13 | # mmconfig has a 64bit special | 13 | # mmconfig has a 64bit special |
| 14 | obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o direct.o | 14 | obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o direct.o |
| 15 | 15 | ||
| @@ -23,3 +23,4 @@ common-y += ../../i386/pci/common.o | |||
| 23 | fixup-y += ../../i386/pci/fixup.o | 23 | fixup-y += ../../i386/pci/fixup.o |
| 24 | i386-y += ../../i386/pci/i386.o | 24 | i386-y += ../../i386/pci/i386.o |
| 25 | init-y += ../../i386/pci/init.o | 25 | init-y += ../../i386/pci/init.o |
| 26 | early-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...) | 9 | extern u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset); |
| 11 | 10 | extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset); | |
| 12 | static inline u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset) | 11 | extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset); |
| 13 | { | 12 | extern 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 | |||
| 22 | static 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 | |||
| 31 | static 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 | |||
| 40 | static 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 |
