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added programmed XLBUS arbiter master priorities

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This commit is contained in:
Markus Fröschle
2013-11-12 09:50:17 +00:00
parent bd4f85b07d
commit 7bd0a5f1a3
2 changed files with 21 additions and 5 deletions
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15
sources/pci.c
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@@ -670,6 +670,21 @@ void init_xlbus_arbiter(void)
MCF_XLB_XARB_ADRTO = 0x1fffff;
MCF_XLB_XARB_DATTO = 0x1fffff;
MCF_XLB_XARB_BUSTO = 0xffffff;
/*
* set arbitration priorities for XLBUS masters
*
* M0 = ColdFire core
* M2 = Multichannel DMA
* M3 = PCI target interface
*/
MCF_XLB_XARB_PRIEN = MCF_XLB_XARB_PRIEN_M0 | /* activate programmed priority for Coldfire core */
MCF_XLB_XARB_PRIEN_M2 | /* activate programmed priority for Multichannel DMA */
MCF_XLB_XARB_PRIEN_M3; /* activate programmed priority for PCI target interface */
MCF_XLB_XARB_PRI = MCF_XLB_XARB_PRI_M0P(3) | /* Coldfire core gets lowest */
MCF_XLB_XARB_PRI_M2P(5) | /* Multichannel DMA mid priority */
MCF_XLB_XARB_PRI_M3P(7); /* PCI target interface is highest priority */
}