WebSVN – HelenOS – Diff – /trunk/kernel/genarch/src/ofw/pci.c


/*
 * 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 ofw
 * @{
 */
/**
 * @file
 * @brief   PCI 'reg' and 'ranges' properties handling.
 *
 */
 
#include <genarch/ofw/ofw_tree.h>
#include <arch/drivers/pci.h>
#include <arch/trap/interrupt.h>
#include <arch/memstr.h>
#include <func.h>
#include <panic.h>
#include <macros.h>
 
#define PCI_SPACE_MASK      0x03000000
#define PCI_ABS_MASK        0x80000000  
#define PCI_REG_MASK        0x000000ff
 
#define PCI_IGN         0x1f
 
bool ofw_pci_apply_ranges(ofw_tree_node_t *node, ofw_pci_reg_t *reg, uintptr_t *pa)
{
    ofw_tree_property_t *prop;
    ofw_pci_range_t *range;
    count_t ranges;
 
    prop = ofw_tree_getprop(node, "ranges");
    if (!prop) {
        if (strcmp(ofw_tree_node_name(node->parent), "pci") == 0)
            return ofw_pci_apply_ranges(node->parent, reg, pa);
        return false;
    }
       
    ranges = prop->size / sizeof(ofw_pci_range_t);
    range = prop->value;
   
    int i;
   
    for (i = 0; i < ranges; i++) {
        if ((reg->space & PCI_SPACE_MASK) != (range[i].space & PCI_SPACE_MASK))
            continue;
        if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) {
            *pa = range[i].parent_base + (reg->addr - range[i].child_base);
            return true;
        }
    }
 
    return false;
}
 
bool ofw_pci_reg_absolutize(ofw_tree_node_t *node, ofw_pci_reg_t *reg, ofw_pci_reg_t *out)
{
    if (reg->space & PCI_ABS_MASK) {
        /* already absolute */
        out->space = reg->space;
        out->addr = reg->addr;
        out->size = reg->size;
        return true;
    }
   
    ofw_tree_property_t *prop;
    ofw_pci_reg_t *assigned_address;
    count_t assigned_addresses;
   
    prop = ofw_tree_getprop(node, "assigned-addresses");
    if (!prop)
        panic("Can't find \"assigned-addresses\" property.\n");
   
    assigned_addresses = prop->size / sizeof(ofw_pci_reg_t);
    assigned_address = prop->value;
   
    int i;
   
    for (i = 0; i < assigned_addresses; i++) {
        if ((assigned_address[i].space & PCI_REG_MASK) == (reg->space & PCI_REG_MASK)) {
            out->space = assigned_address[i].space;
            out->addr = reg->addr + assigned_address[i].addr;
            out->size = reg->size;
            return true;
        }
    }
   
    return false;
}
 
/** Map PCI interrupt.
 *
 * So far, we only know how to map interrupts of non-PCI devices connected
 * to a PCI bridge.
 */
bool ofw_pci_map_interrupt(ofw_tree_node_t *node, ofw_pci_reg_t *reg, int ino, int *inr)
{
    pci_t *pci = node->device;
    if (!pci) {
        pci = pci_init(node);
        if (!pci)
            return false;
        node->device = pci;
    }
 
    pci_enable_interrupt(pci, ino);
 
    *inr = (PCI_IGN << IGN_SHIFT) | ino;
 
    return true;
}
 
/** @}
 */
 

Rev 1912	Rev 2071
1	/*	1	/*
2	* Copyright (C) 2006 Jakub Jermar	2	* Copyright (c) 2006 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup ofw	29	/** @addtogroup ofw
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file	33	* @file
34	* @brief PCI 'reg' and 'ranges' properties handling.	34	* @brief PCI 'reg' and 'ranges' properties handling.
35	*	35	*
36	*/	36	*/
37		37
38	#include <genarch/ofw/ofw_tree.h>	38	#include <genarch/ofw/ofw_tree.h>
39	#include <arch/drivers/pci.h>	39	#include <arch/drivers/pci.h>
40	#include <arch/trap/interrupt.h>	40	#include <arch/trap/interrupt.h>
41	#include <arch/memstr.h>	41	#include <arch/memstr.h>
42	#include <func.h>	42	#include <func.h>
43	#include <panic.h>	43	#include <panic.h>
44	#include <macros.h>	44	#include <macros.h>
45		45
46	#define PCI_SPACE_MASK 0x03000000	46	#define PCI_SPACE_MASK 0x03000000
47	#define PCI_ABS_MASK 0x80000000	47	#define PCI_ABS_MASK 0x80000000
48	#define PCI_REG_MASK 0x000000ff	48	#define PCI_REG_MASK 0x000000ff
49		49
50	#define PCI_IGN 0x1f	50	#define PCI_IGN 0x1f
51		51
52	bool ofw_pci_apply_ranges(ofw_tree_node_t node, ofw_pci_reg_t reg, uintptr_t *pa)	52	bool ofw_pci_apply_ranges(ofw_tree_node_t node, ofw_pci_reg_t reg, uintptr_t *pa)
53	{	53	{
54	ofw_tree_property_t *prop;	54	ofw_tree_property_t *prop;
55	ofw_pci_range_t *range;	55	ofw_pci_range_t *range;
56	count_t ranges;	56	count_t ranges;
57		57
58	prop = ofw_tree_getprop(node, "ranges");	58	prop = ofw_tree_getprop(node, "ranges");
59	if (!prop) {	59	if (!prop) {
60	if (strcmp(ofw_tree_node_name(node->parent), "pci") == 0)	60	if (strcmp(ofw_tree_node_name(node->parent), "pci") == 0)
61	return ofw_pci_apply_ranges(node->parent, reg, pa);	61	return ofw_pci_apply_ranges(node->parent, reg, pa);
62	return false;	62	return false;
63	}	63	}
64		64
65	ranges = prop->size / sizeof(ofw_pci_range_t);	65	ranges = prop->size / sizeof(ofw_pci_range_t);
66	range = prop->value;	66	range = prop->value;
67		67
68	int i;	68	int i;
69		69
70	for (i = 0; i < ranges; i++) {	70	for (i = 0; i < ranges; i++) {
71	if ((reg->space & PCI_SPACE_MASK) != (range[i].space & PCI_SPACE_MASK))	71	if ((reg->space & PCI_SPACE_MASK) != (range[i].space & PCI_SPACE_MASK))
72	continue;	72	continue;
73	if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) {	73	if (overlaps(reg->addr, reg->size, range[i].child_base, range[i].size)) {
74	*pa = range[i].parent_base + (reg->addr - range[i].child_base);	74	*pa = range[i].parent_base + (reg->addr - range[i].child_base);
75	return true;	75	return true;
76	}	76	}
77	}	77	}
78		78
79	return false;	79	return false;
80	}	80	}
81		81
82	bool ofw_pci_reg_absolutize(ofw_tree_node_t node, ofw_pci_reg_t reg, ofw_pci_reg_t *out)	82	bool ofw_pci_reg_absolutize(ofw_tree_node_t node, ofw_pci_reg_t reg, ofw_pci_reg_t *out)
83	{	83	{
84	if (reg->space & PCI_ABS_MASK) {	84	if (reg->space & PCI_ABS_MASK) {
85	/* already absolute */	85	/* already absolute */
86	out->space = reg->space;	86	out->space = reg->space;
87	out->addr = reg->addr;	87	out->addr = reg->addr;
88	out->size = reg->size;	88	out->size = reg->size;
89	return true;	89	return true;
90	}	90	}
91		91
92	ofw_tree_property_t *prop;	92	ofw_tree_property_t *prop;
93	ofw_pci_reg_t *assigned_address;	93	ofw_pci_reg_t *assigned_address;
94	count_t assigned_addresses;	94	count_t assigned_addresses;
95		95
96	prop = ofw_tree_getprop(node, "assigned-addresses");	96	prop = ofw_tree_getprop(node, "assigned-addresses");
97	if (!prop)	97	if (!prop)
98	panic("Can't find \"assigned-addresses\" property.\n");	98	panic("Can't find \"assigned-addresses\" property.\n");
99		99
100	assigned_addresses = prop->size / sizeof(ofw_pci_reg_t);	100	assigned_addresses = prop->size / sizeof(ofw_pci_reg_t);
101	assigned_address = prop->value;	101	assigned_address = prop->value;
102		102
103	int i;	103	int i;
104		104
105	for (i = 0; i < assigned_addresses; i++) {	105	for (i = 0; i < assigned_addresses; i++) {
106	if ((assigned_address[i].space & PCI_REG_MASK) == (reg->space & PCI_REG_MASK)) {	106	if ((assigned_address[i].space & PCI_REG_MASK) == (reg->space & PCI_REG_MASK)) {
107	out->space = assigned_address[i].space;	107	out->space = assigned_address[i].space;
108	out->addr = reg->addr + assigned_address[i].addr;	108	out->addr = reg->addr + assigned_address[i].addr;
109	out->size = reg->size;	109	out->size = reg->size;
110	return true;	110	return true;
111	}	111	}
112	}	112	}
113		113
114	return false;	114	return false;
115	}	115	}
116		116
117	/** Map PCI interrupt.	117	/** Map PCI interrupt.
118	*	118	*
119	* So far, we only know how to map interrupts of non-PCI devices connected	119	* So far, we only know how to map interrupts of non-PCI devices connected
120	* to a PCI bridge.	120	* to a PCI bridge.
121	*/	121	*/
122	bool ofw_pci_map_interrupt(ofw_tree_node_t node, ofw_pci_reg_t reg, int ino, int *inr)	122	bool ofw_pci_map_interrupt(ofw_tree_node_t node, ofw_pci_reg_t reg, int ino, int *inr)
123	{	123	{
124	pci_t *pci = node->device;	124	pci_t *pci = node->device;
125	if (!pci) {	125	if (!pci) {
126	pci = pci_init(node);	126	pci = pci_init(node);
127	if (!pci)	127	if (!pci)
128	return false;	128	return false;
129	node->device = pci;	129	node->device = pci;
130	}	130	}
131		131
132	pci_enable_interrupt(pci, ino);	132	pci_enable_interrupt(pci, ino);
133		133
134	*inr = (PCI_IGN << IGN_SHIFT) \| ino;	134	*inr = (PCI_IGN << IGN_SHIFT) \| ino;
135		135
136	return true;	136	return true;
137	}	137	}
138		138
139	/** @}	139	/** @}
140	*/	140	*/
141		141

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/ofw/pci.c – Rev 1912 → 2071