diff options
Diffstat (limited to 'arch/sh/include/asm/pci.h')
| -rw-r--r-- | arch/sh/include/asm/pci.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/arch/sh/include/asm/pci.h b/arch/sh/include/asm/pci.h new file mode 100644 index 00000000000..df1d383e18a --- /dev/null +++ b/arch/sh/include/asm/pci.h @@ -0,0 +1,144 @@ +#ifndef __ASM_SH_PCI_H +#define __ASM_SH_PCI_H + +#ifdef __KERNEL__ + +#include <linux/dma-mapping.h> + +/* Can be used to override the logic in pci_scan_bus for skipping + already-configured bus numbers - to be used for buggy BIOSes + or architectures with incomplete PCI setup by the loader */ + +#define pcibios_assign_all_busses() 1 +#define pcibios_scan_all_fns(a, b) 0 + +/* + * A board can define one or more PCI channels that represent built-in (or + * external) PCI controllers. + */ +struct pci_channel { + struct pci_ops *pci_ops; + struct resource *io_resource; + struct resource *mem_resource; + int first_devfn; + int last_devfn; +}; + +/* + * Each board initializes this array and terminates it with a NULL entry. + */ +extern struct pci_channel board_pci_channels[]; + +#define PCIBIOS_MIN_IO board_pci_channels->io_resource->start +#define PCIBIOS_MIN_MEM board_pci_channels->mem_resource->start + +/* + * I/O routine helpers + */ +#if defined(CONFIG_CPU_SUBTYPE_SH7780) || defined(CONFIG_CPU_SUBTYPE_SH7785) +#define PCI_IO_AREA 0xFE400000 +#define PCI_IO_SIZE 0x00400000 +#elif defined(CONFIG_CPU_SH5) +extern unsigned long PCI_IO_AREA; +#define PCI_IO_SIZE 0x00010000 +#else +#define PCI_IO_AREA 0xFE240000 +#define PCI_IO_SIZE 0x00040000 +#endif + +#define PCI_MEM_SIZE 0x01000000 + +#define SH4_PCIIOBR_MASK 0xFFFC0000 +#define pci_ioaddr(addr) (PCI_IO_AREA + (addr & ~SH4_PCIIOBR_MASK)) + +#if defined(CONFIG_PCI) +#define is_pci_ioaddr(port) \ + (((port) >= PCIBIOS_MIN_IO) && \ + ((port) < (PCIBIOS_MIN_IO + PCI_IO_SIZE))) +#define is_pci_memaddr(port) \ + (((port) >= PCIBIOS_MIN_MEM) && \ + ((port) < (PCIBIOS_MIN_MEM + PCI_MEM_SIZE))) +#else +#define is_pci_ioaddr(port) (0) +#define is_pci_memaddr(port) (0) +#endif + +struct pci_dev; + +extern void pcibios_set_master(struct pci_dev *dev); + +static inline void pcibios_penalize_isa_irq(int irq, int active) +{ + /* We don't do dynamic PCI IRQ allocation */ +} + +/* Dynamic DMA mapping stuff. + * SuperH has everything mapped statically like x86. + */ + +/* The PCI address space does equal the physical memory + * address space. The networking and block device layers use + * this boolean for bounce buffer decisions. + */ +#define PCI_DMA_BUS_IS_PHYS (1) + +#include <linux/types.h> +#include <linux/slab.h> +#include <asm/scatterlist.h> +#include <linux/string.h> +#include <asm/io.h> + +/* pci_unmap_{single,page} being a nop depends upon the + * configuration. + */ +#ifdef CONFIG_SH_PCIDMA_NONCOHERENT +#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ + dma_addr_t ADDR_NAME; +#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \ + __u32 LEN_NAME; +#define pci_unmap_addr(PTR, ADDR_NAME) \ + ((PTR)->ADDR_NAME) +#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \ + (((PTR)->ADDR_NAME) = (VAL)) +#define pci_unmap_len(PTR, LEN_NAME) \ + ((PTR)->LEN_NAME) +#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ + (((PTR)->LEN_NAME) = (VAL)) +#else +#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) +#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) +#define pci_unmap_addr(PTR, ADDR_NAME) (0) +#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0) +#define pci_unmap_len(PTR, LEN_NAME) (0) +#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) +#endif + +#ifdef CONFIG_PCI +static inline void pci_dma_burst_advice(struct pci_dev *pdev, + enum pci_dma_burst_strategy *strat, + unsigned long *strategy_parameter) +{ + *strat = PCI_DMA_BURST_INFINITY; + *strategy_parameter = ~0UL; +} +#endif + +/* Board-specific fixup routines. */ +void pcibios_fixup(void); +int pcibios_init_platform(void); +int pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin); + +#ifdef CONFIG_PCI_AUTO +int pciauto_assign_resources(int busno, struct pci_channel *hose); +#endif + +#endif /* __KERNEL__ */ + +/* generic pci stuff */ +#include <asm-generic/pci.h> + +/* generic DMA-mapping stuff */ +#include <asm-generic/pci-dma-compat.h> + +#endif /* __ASM_SH_PCI_H */ + |