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1624 |
jcastillo |
/* $Id: ranges.c,v 1.1 2005-12-20 09:49:32 jcastillo Exp $
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* ranges.c: Handle ranges in newer proms for obio/sbus.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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struct linux_prom_ranges promlib_obio_ranges[PROMREG_MAX];
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struct linux_prom_ranges promlib_sbus_ranges[PROMREG_MAX];
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int num_obio_ranges, num_sbus_ranges;
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/* Adjust register values based upon the ranges parameters. */
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void
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prom_adjust_regs(struct linux_prom_registers *regp, int nregs,
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struct linux_prom_ranges *rangep, int nranges)
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{
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int regc, rngc;
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for(regc=0; regc < nregs; regc++) {
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for(rngc=0; rngc < nranges; rngc++)
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if(regp[regc].which_io == rangep[rngc].ot_child_space)
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break; /* Fount it */
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if(rngc==nranges) /* oops */
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prom_printf("adjust_regs: Could not find range with matching bus type...\n");
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regp[regc].which_io = rangep[rngc].ot_parent_space;
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regp[regc].phys_addr += rangep[rngc].ot_parent_base;
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}
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return;
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}
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void
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prom_adjust_ranges(struct linux_prom_ranges *ranges1, int nranges1,
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struct linux_prom_ranges *ranges2, int nranges2)
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{
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int rng1c, rng2c;
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for(rng1c=0; rng1c < nranges1; rng1c++) {
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for(rng2c=0; rng2c < nranges2; rng2c++)
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if(ranges1[rng1c].ot_child_space ==
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ranges2[rng2c].ot_child_space) break;
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if(rng2c == nranges2) /* oops */
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prom_printf("adjust_ranges: Could not find matching bus type...\n");
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ranges1[rng1c].ot_parent_space = ranges2[rng2c].ot_parent_space;
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ranges1[rng1c].ot_parent_base += ranges2[rng2c].ot_parent_base;
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}
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return;
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}
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/* Apply probed obio ranges to registers passed, if no ranges return. */
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void
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prom_apply_obio_ranges(struct linux_prom_registers *regs, int nregs)
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{
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if(!num_obio_ranges) return;
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prom_adjust_regs(regs, nregs, promlib_obio_ranges, num_obio_ranges);
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return;
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}
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/* Apply probed sbus ranges to registers passed, if no ranges return. */
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void
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prom_apply_sbus_ranges(struct linux_prom_registers *regs, int nregs)
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{
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if(!num_sbus_ranges) return;
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prom_adjust_regs(regs, nregs, promlib_sbus_ranges, num_sbus_ranges);
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return;
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}
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void
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prom_ranges_init(void)
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{
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int node, obio_node, sbus_node;
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int success;
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num_obio_ranges = 0;
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num_sbus_ranges = 0;
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/* Check for obio and sbus ranges. */
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node = prom_getchild(prom_root_node);
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obio_node = prom_searchsiblings(node, "obio");
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sbus_node = prom_searchsiblings(node, "iommu");
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if(sbus_node) {
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sbus_node = prom_getchild(sbus_node);
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sbus_node = prom_searchsiblings(sbus_node, "sbus");
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}
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if(obio_node) {
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success = prom_getproperty(obio_node, "ranges",
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(char *) promlib_obio_ranges,
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sizeof(promlib_obio_ranges));
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if(success != -1)
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num_obio_ranges = (success/sizeof(struct linux_prom_ranges));
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}
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if(sbus_node) {
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success = prom_getproperty(sbus_node, "ranges",
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(char *) promlib_sbus_ranges,
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sizeof(promlib_sbus_ranges));
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if(success != -1)
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num_sbus_ranges = (success/sizeof(struct linux_prom_ranges));
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}
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if(num_obio_ranges || num_sbus_ranges)
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prom_printf("PROMLIB: obio_ranges %d sbus_ranges %d\n",
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num_obio_ranges, num_sbus_ranges);
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return;
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}
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