forked from Imagelibrary/rtems
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
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* detect_host_bridge.c
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*
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* This code is inspired by detect_grackle_bridge.c of SVGM BSP
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* written by Till Straumann
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* Copyright (C) 2001, 2003 Till Straumann <strauman@slac.stanford.edu>
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*
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* Copyright (C) 2004 S. Kate Feng, <feng1@bnl.gov>
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* wrote it to support the MVME5500 board.
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*
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*/
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#include <libcpu/io.h>
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#include <rtems/bspIo.h> /* printk */
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#include <bsp/pci.h>
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#include <bsp/gtreg.h>
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#include <bsp/gtpcireg.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#define PCI_DEBUG 0
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#define HOSTBRIDGET_ERROR 0xf0000000
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unsigned long _BSP_clear_hostbridge_errors(int enableMCP, int quiet)
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{
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uint32_t pcidata, pcidata1;
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int PciLocal, busNumber=0;
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/* On the mvme5500 board, the GT64260B system controller had the MCP
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* signal pulled up high. Thus, the MCP signal is not used as it is
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* on other boards such as mvme2307.
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*/
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if (enableMCP) return(-1);
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for (PciLocal=0; PciLocal<1; PciLocal++ ) {
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pci_read_config_dword(busNumber,
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0,
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0,
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PCI_COMMAND,
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&pcidata);
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if (!quiet)
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printk("Before _BSP_clear_hostbridge_errors(): 0x%" PRIx32 ", cause 0x%lx\n",
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pcidata, inl(0x1d58));
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outl(0,0x1d58);
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/* Clear the error on the host bridge */
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pcidata1= pcidata;
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pcidata1 |= PCI_STATUS_CLRERR_MASK;
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pcidata1 |= 0x140;
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pci_write_config_dword(busNumber,
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0,
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0,
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PCI_COMMAND,
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pcidata1);
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pci_read_config_dword(busNumber,
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0,
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0,
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PCI_COMMAND,
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&pcidata1);
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if (!quiet) printk("After _BSP_clear_hostbridge_errors(): sts 0x%" PRIx32 "\n",
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pcidata1);
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if (pcidata1 & HOSTBRIDGET_ERROR) printk("BSP_clear_hostbridge_errors(): unable to clear pending hostbridge errors\n");
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busNumber += BSP_MAX_PCI_BUS_ON_PCI0;
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}
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return(pcidata & HOSTBRIDGET_ERROR);
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}
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