/* * Copyright (c) 2006 Jakub Jermar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup kernel_genarch * @{ */ /** * @file * @brief EBUS 'reg' and 'ranges' properties handling. * */ #include #include #include #include #include #include #include /** Apply EBUS ranges to EBUS register. */ bool ofw_ebus_apply_ranges(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uintptr_t *pa) { ofw_tree_property_t *prop; ofw_ebus_range_t *range; size_t ranges; prop = ofw_tree_getprop(node, "ranges"); if (!prop) return false; ranges = prop->size / sizeof(ofw_ebus_range_t); range = prop->value; unsigned int i; for (i = 0; i < ranges; i++) { if (reg->space != range[i].child_space) continue; if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) { ofw_pci_reg_t pci_reg; pci_reg.space = range[i].parent_space; pci_reg.addr = range[i].parent_base + (reg->addr - range[i].child_base); pci_reg.size = reg->size; return ofw_pci_apply_ranges(node->parent, &pci_reg, pa); } } return false; } bool ofw_ebus_map_interrupt(ofw_tree_node_t *node, ofw_ebus_reg_t *reg, uint32_t interrupt, int *inr, cir_t *cir, void **cir_arg) { ofw_tree_property_t *prop; ofw_tree_node_t *controller; prop = ofw_tree_getprop(node, "interrupt-map"); if (!prop || !prop->value) return false; ofw_ebus_intr_map_t *intr_map = prop->value; size_t count = prop->size / sizeof(ofw_ebus_intr_map_t); assert(count); prop = ofw_tree_getprop(node, "interrupt-map-mask"); if (!prop || !prop->value) return false; ofw_ebus_intr_mask_t *intr_mask = prop->value; assert(prop->size == sizeof(ofw_ebus_intr_mask_t)); uint32_t space = reg->space & intr_mask->space_mask; uint32_t addr = reg->addr & intr_mask->addr_mask; uint32_t intr = interrupt & intr_mask->intr_mask; unsigned int i; for (i = 0; i < count; i++) { if ((intr_map[i].space == space) && (intr_map[i].addr == addr) && (intr_map[i].intr == intr)) goto found; } return false; found: /* * We found the device that functions as an interrupt controller * for the interrupt. We also found partial mapping from interrupt to * INO. */ controller = ofw_tree_find_node_by_handle(ofw_tree_lookup("/"), intr_map[i].controller_handle); if (!controller) return false; if (str_cmp(ofw_tree_node_name(controller), "pci") != 0) { /* * This is not a PCI node. */ return false; } /* * Let the PCI do the next step in mapping the interrupt. */ if (!ofw_pci_map_interrupt(controller, NULL, intr_map[i].controller_ino, inr, cir, cir_arg)) return false; return true; } /** @} */