diff options
Diffstat (limited to 'bsps/powerpc/mvme5500/net/if_1GHz/pci_map.c')
| -rw-r--r-- | bsps/powerpc/mvme5500/net/if_1GHz/pci_map.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/bsps/powerpc/mvme5500/net/if_1GHz/pci_map.c b/bsps/powerpc/mvme5500/net/if_1GHz/pci_map.c new file mode 100644 index 0000000000..26b143ea1a --- /dev/null +++ b/bsps/powerpc/mvme5500/net/if_1GHz/pci_map.c @@ -0,0 +1,135 @@ +/* $NetBSD: pci_map.c,v 1.12 2002/05/30 12:06:43 drochner Exp $ */ + +/*- + * Copyright (c) 2004, 2005 Brookhaven National Laboratory + * S. Kate Feng <feng1@bnl.gov> + * + * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Charles M. Hannum; by William R. Studenmund; by Jason R. Thorpe. + * + */ + +/* + * PCI device mapping. + */ + +#include <sys/cdefs.h> +#include <sys/param.h> +#include <sys/systm.h> +#include <rtems/rtems/types.h> + +#include <bsp/pci.h> +#include <bsp/pcireg.h> + +extern int pci_get_capability(int b, int d, int f, int capid,int *offset,uint32_t *value); +extern int pci_mem_find(int b, int d, int f, int reg, unsigned *basep,unsigned *sizep); +extern int pci_io_find(int b, int d, int f, int reg,unsigned *basep,unsigned *sizep); + +int pci_io_find(int b, int d, int f, int reg,unsigned *basep,unsigned *sizep) +{ + uint32_t address, mask; + + if (reg < PCI_MAPREG_START || +#if 0 + /* + * Can't do this check; some devices have mapping registers + * way out in left field. + */ + reg >= PCI_MAPREG_END || +#endif + (reg & 3)) + rtems_panic("pci_io_find: bad request"); + + /* + * Section 6.2.5.1, `Address Maps', tells us that: + * + * 1) The builtin software should have already mapped the device in a + * reasonable way. + * + * 2) A device which wants 2^n bytes of memory will hardwire the bottom + * n bits of the address to 0. As recommended, we write all 1s and see + * what we get back. + */ + pci_read_config_dword(b,d,f,reg, &address); + if ( !(address & PCI_MAPREG_TYPE_IO)) return(1); + pci_write_config_dword(b,d,f,reg, 0xffffffff); + pci_read_config_dword(b,d,f,reg,&mask); + pci_write_config_dword(b,d,f,reg, address); + + if ( (*sizep = PCI_MAPREG_IO_SIZE(mask))== 0) { + printk("pci_io_find: void region\n"); + return(1); + } + *basep = PCI_MAPREG_IO_ADDR(address); + return(0); +} + +int pci_mem_find(int b, int d, int f, int reg, unsigned *basep,unsigned *sizep) +{ + uint32_t address, mask; + + if (reg < PCI_MAPREG_START || +#if 0 + /* + * Can't do this check; some devices have mapping registers + * way out in left field. + */ + reg >= PCI_MAPREG_END || +#endif + (reg & 3)) + rtems_panic("pci_mem_find: bad request"); + + pci_read_config_dword(b,d,f,reg, &address); + if (address & PCI_MAPREG_TYPE_IO) { + printk("pci_mem_find: expected type mem, found I/O\n"); + return(1); + } + + /* + * Section 6.2.5.1, `Address Maps', tells us that: + * + * 1) The builtin software should have already mapped the device in a + * reasonable way. + * + * 2) A device which wants 2^n bytes of memory will hardwire the bottom + * n bits of the address to 0. As recommended, we write all 1s and see + * what we get back. + */ + pci_write_config_dword(b,d,f,reg, 0xffffffff); + pci_read_config_dword(b,d,f,reg,&mask); + pci_write_config_dword(b,d,f,reg, address); + if ( (*sizep = PCI_MAPREG_MEM_SIZE(mask))== 0) { + printk("pci_io_find: void region\n"); + return (1); + } + *basep = PCI_MAPREG_MEM_ADDR(address); + return(0); +} + +int pci_get_capability(int b, int d, int f, int capid,int *offset,uint32_t *value) +{ + uint32_t reg, ofs; + + /* i82544EI PCI_CAPLISTPTR_REG */ + pci_read_config_dword(b,d,f,PCI_CAPLISTPTR_REG, ®); + ofs = PCI_CAPLIST_PTR(reg); + while (ofs != 0) { +#ifdef DIAGNOSTIC + if ((ofs & 3) || (ofs < 0x40)) + panic("pci_get_capability"); +#endif + pci_read_config_dword(b,d,f,ofs, ®); + if (PCI_CAPLIST_CAP(reg) == capid) { + if (offset) + *offset = ofs; + if (value) + *value = reg; + return (1); + } + ofs = PCI_CAPLIST_NEXT(reg); + } + return (0); +} |