From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/sparc/prom/ranges.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 arch/sparc/prom/ranges.c (limited to 'arch/sparc/prom/ranges.c') diff --git a/arch/sparc/prom/ranges.c b/arch/sparc/prom/ranges.c new file mode 100644 index 000000000000..a2920323c900 --- /dev/null +++ b/arch/sparc/prom/ranges.c @@ -0,0 +1,118 @@ +/* $Id: ranges.c,v 1.15 2001/12/19 00:29:51 davem Exp $ + * ranges.c: Handle ranges in newer proms for obio/sbus. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + */ + +#include +#include +#include +#include +#include +#include + +struct linux_prom_ranges promlib_obio_ranges[PROMREG_MAX]; +int num_obio_ranges; + +/* Adjust register values based upon the ranges parameters. */ +static void +prom_adjust_regs(struct linux_prom_registers *regp, int nregs, + struct linux_prom_ranges *rangep, int nranges) +{ + int regc, rngc; + + for (regc = 0; regc < nregs; regc++) { + for (rngc = 0; rngc < nranges; rngc++) + if (regp[regc].which_io == rangep[rngc].ot_child_space) + break; /* Fount it */ + if (rngc == nranges) /* oops */ + prom_printf("adjust_regs: Could not find range with matching bus type...\n"); + regp[regc].which_io = rangep[rngc].ot_parent_space; + regp[regc].phys_addr -= rangep[rngc].ot_child_base; + regp[regc].phys_addr += rangep[rngc].ot_parent_base; + } +} + +void +prom_adjust_ranges(struct linux_prom_ranges *ranges1, int nranges1, + struct linux_prom_ranges *ranges2, int nranges2) +{ + int rng1c, rng2c; + + for(rng1c=0; rng1c < nranges1; rng1c++) { + for(rng2c=0; rng2c < nranges2; rng2c++) + if(ranges1[rng1c].ot_parent_space == ranges2[rng2c].ot_child_space && + ranges1[rng1c].ot_parent_base >= ranges2[rng2c].ot_child_base && + ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size - ranges1[rng1c].ot_parent_base > 0U) + break; + if(rng2c == nranges2) /* oops */ + prom_printf("adjust_ranges: Could not find matching bus type...\n"); + else if (ranges1[rng1c].ot_parent_base + ranges1[rng1c].or_size > ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size) + ranges1[rng1c].or_size = + ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size - ranges1[rng1c].ot_parent_base; + ranges1[rng1c].ot_parent_space = ranges2[rng2c].ot_parent_space; + ranges1[rng1c].ot_parent_base += ranges2[rng2c].ot_parent_base; + } +} + +/* Apply probed obio ranges to registers passed, if no ranges return. */ +void +prom_apply_obio_ranges(struct linux_prom_registers *regs, int nregs) +{ + if(num_obio_ranges) + prom_adjust_regs(regs, nregs, promlib_obio_ranges, num_obio_ranges); +} + +void __init prom_ranges_init(void) +{ + int node, obio_node; + int success; + + num_obio_ranges = 0; + + /* Check for obio and sbus ranges. */ + node = prom_getchild(prom_root_node); + obio_node = prom_searchsiblings(node, "obio"); + + if(obio_node) { + success = prom_getproperty(obio_node, "ranges", + (char *) promlib_obio_ranges, + sizeof(promlib_obio_ranges)); + if(success != -1) + num_obio_ranges = (success/sizeof(struct linux_prom_ranges)); + } + + if(num_obio_ranges) + prom_printf("PROMLIB: obio_ranges %d\n", num_obio_ranges); + + return; +} + +void +prom_apply_generic_ranges (int node, int parent, struct linux_prom_registers *regs, int nregs) +{ + int success; + int num_ranges; + struct linux_prom_ranges ranges[PROMREG_MAX]; + + success = prom_getproperty(node, "ranges", + (char *) ranges, + sizeof (ranges)); + if (success != -1) { + num_ranges = (success/sizeof(struct linux_prom_ranges)); + if (parent) { + struct linux_prom_ranges parent_ranges[PROMREG_MAX]; + int num_parent_ranges; + + success = prom_getproperty(parent, "ranges", + (char *) parent_ranges, + sizeof (parent_ranges)); + if (success != -1) { + num_parent_ranges = (success/sizeof(struct linux_prom_ranges)); + prom_adjust_ranges (ranges, num_ranges, parent_ranges, num_parent_ranges); + } + } + prom_adjust_regs(regs, nregs, ranges, num_ranges); + } +} -- cgit v1.2.2