WebSVN – HelenOS – Diff – /branches/dynload/uspace/lib/libc/generic/ddi.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 libc
 * @{
 */
/** @file
 */
 
#include <ddi.h>
#include <libarch/ddi.h>
#include <libc.h>
#include <task.h>
#include <as.h>
#include <align.h>
#include <libarch/config.h>
#include <kernel/ddi/ddi_arg.h>
 
/** Return unique device number.
 *
 * @return New unique device number.
 *
 */
int device_assign_devno(void)
{
    return __SYSCALL0(SYS_DEVICE_ASSIGN_DEVNO);
}
 
/** Map piece of physical memory to task.
 *
 * Caller of this function must have the CAP_MEM_MANAGER capability.
 *
 * @param pf        Physical address of the starting frame.
 * @param vp        Virtual address of the starting page.
 * @param pages     Number of pages to map.
 * @param flags     Flags for the new address space area.
 *
 * @return      0 on success, EPERM if the caller lacks the
 *          CAP_MEM_MANAGER capability, ENOENT if there is no task
 *          with specified ID and ENOMEM if there was some problem
 *          in creating address space area.
 */
int physmem_map(void *pf, void *vp, unsigned long pages, int flags)
{
    return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp, pages,
        flags);
}
 
/** Enable I/O space range to task.
 *
 * Caller of this function must have the IO_MEM_MANAGER capability.
 *
 * @param id        Task ID.
 * @param ioaddr    Starting address of the I/O range.
 * @param size      Size of the range.
 *
 * @return      0 on success, EPERM if the caller lacks the
 *          CAP_IO_MANAGER capability, ENOENT if there is no task
 *          with specified ID and ENOMEM if there was some problem
 *          in allocating memory.
 */
int iospace_enable(task_id_t id, void *ioaddr, unsigned long size)
{
    ddi_ioarg_t arg;
 
    arg.task_id = id;
    arg.ioaddr = ioaddr;
    arg.size = size;
 
    return __SYSCALL1(SYS_IOSPACE_ENABLE, (sysarg_t) &arg);
}
 
/** Interrupt control
 *
 * @param enable    1 - enable interrupts, 0 - disable interrupts
 */
int preemption_control(int enable)
{
    return __SYSCALL1(SYS_PREEMPT_CONTROL, (sysarg_t) enable);
}
 
/** Enable PIO for specified I/O range.
 *
 * @param pio_addr  I/O start address.
 * @param size      Size of the I/O region.
 * @param use_addr  Address where the final address for application's PIO
 *          will be stored.
 *
 * @return      Zero on success or negative error code.
 */
int pio_enable(void *pio_addr, size_t size, void **use_addr)
{
    void *phys;
    void *virt;
    size_t offset;
    unsigned int pages;
 
#ifdef IO_SPACE_BOUNDARY
    if (pio_addr < IO_SPACE_BOUNDARY) {
        *use_addr = pio_addr;
        return iospace_enable(task_get_id(), pio_addr, size);
    }
#endif
 
    phys = ALIGN_DOWN((uintptr_t) pio_addr, PAGE_SIZE);
    offset = pio_addr - phys;
    pages = ALIGN_UP(offset + size, PAGE_SIZE) >> PAGE_WIDTH;
    virt = as_get_mappable_page(pages);
    *use_addr = virt + offset;
    return physmem_map(phys, virt, pages, AS_AREA_READ | AS_AREA_WRITE);
}
 
/** @}
 */
 

Subversion Repositories HelenOS

(root)/branches/dynload/uspace/lib/libc/generic/ddi.c @ 4345 – Rev 4345 → 4347

Rev 4345		Rev 4347
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 libc	29	/** @addtogroup libc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <ddi.h>	35	#include <ddi.h>
36	#include <libarch/ddi.h>	36	#include <libarch/ddi.h>
37	#include <libc.h>	37	#include <libc.h>
38	#include <task.h>	38	#include <task.h>
39	#include <as.h>	39	#include <as.h>
40	#include <align.h>	40	#include <align.h>
41	#include <libarch/config.h>	41	#include <libarch/config.h>
42	#include <kernel/ddi/ddi_arg.h>	42	#include <kernel/ddi/ddi_arg.h>
43		43
-		44	/** Return unique device number.
-		45	*
-		46	* @return New unique device number.
-		47	*
-		48	*/
-		49	int device_assign_devno(void)
-		50	{
-		51	return __SYSCALL0(SYS_DEVICE_ASSIGN_DEVNO);
-		52	}
-		53
44	/** Map piece of physical memory to task.	54	/** Map piece of physical memory to task.
45	*	55	*
46	* Caller of this function must have the CAP_MEM_MANAGER capability.	56	* Caller of this function must have the CAP_MEM_MANAGER capability.
47	*	57	*
48	* @param pf Physical address of the starting frame.	58	* @param pf Physical address of the starting frame.
49	* @param vp Virtual address of the starting page.	59	* @param vp Virtual address of the starting page.
50	* @param pages Number of pages to map.	60	* @param pages Number of pages to map.
51	* @param flags Flags for the new address space area.	61	* @param flags Flags for the new address space area.
52	*	62	*
53	* @return 0 on success, EPERM if the caller lacks the	63	* @return 0 on success, EPERM if the caller lacks the
54	* CAP_MEM_MANAGER capability, ENOENT if there is no task	64	* CAP_MEM_MANAGER capability, ENOENT if there is no task
55	* with specified ID and ENOMEM if there was some problem	65	* with specified ID and ENOMEM if there was some problem
56	* in creating address space area.	66	* in creating address space area.
57	*/	67	*/
58	int physmem_map(void pf, void vp, unsigned long pages, int flags)	68	int physmem_map(void pf, void vp, unsigned long pages, int flags)
59	{	69	{
60	return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp, pages,	70	return __SYSCALL4(SYS_PHYSMEM_MAP, (sysarg_t) pf, (sysarg_t) vp, pages,
61	flags);	71	flags);
62	}	72	}
63		73
64	/** Enable I/O space range to task.	74	/** Enable I/O space range to task.
65	*	75	*
66	* Caller of this function must have the IO_MEM_MANAGER capability.	76	* Caller of this function must have the IO_MEM_MANAGER capability.
67	*	77	*
68	* @param id Task ID.	78	* @param id Task ID.
69	* @param ioaddr Starting address of the I/O range.	79	* @param ioaddr Starting address of the I/O range.
70	* @param size Size of the range.	80	* @param size Size of the range.
71	*	81	*
72	* @return 0 on success, EPERM if the caller lacks the	82	* @return 0 on success, EPERM if the caller lacks the
73	* CAP_IO_MANAGER capability, ENOENT if there is no task	83	* CAP_IO_MANAGER capability, ENOENT if there is no task
74	* with specified ID and ENOMEM if there was some problem	84	* with specified ID and ENOMEM if there was some problem
75	* in allocating memory.	85	* in allocating memory.
76	*/	86	*/
77	int iospace_enable(task_id_t id, void *ioaddr, unsigned long size)	87	int iospace_enable(task_id_t id, void *ioaddr, unsigned long size)
78	{	88	{
79	ddi_ioarg_t arg;	89	ddi_ioarg_t arg;
80		90
81	arg.task_id = id;	91	arg.task_id = id;
82	arg.ioaddr = ioaddr;	92	arg.ioaddr = ioaddr;
83	arg.size = size;	93	arg.size = size;
84		94
85	return __SYSCALL1(SYS_IOSPACE_ENABLE, (sysarg_t) &arg);	95	return __SYSCALL1(SYS_IOSPACE_ENABLE, (sysarg_t) &arg);
86	}	96	}
87		97
88	/** Interrupt control	98	/** Interrupt control
89	*	99	*
90	* @param enable 1 - enable interrupts, 0 - disable interrupts	100	* @param enable 1 - enable interrupts, 0 - disable interrupts
91	*/	101	*/
92	int preemption_control(int enable)	102	int preemption_control(int enable)
93	{	103	{
94	return __SYSCALL1(SYS_PREEMPT_CONTROL, (sysarg_t) enable);	104	return __SYSCALL1(SYS_PREEMPT_CONTROL, (sysarg_t) enable);
95	}	105	}
96		106
97	/** Enable PIO for specified I/O range.	107	/** Enable PIO for specified I/O range.
98	*	108	*
99	* @param pio_addr I/O start address.	109	* @param pio_addr I/O start address.
100	* @param size Size of the I/O region.	110	* @param size Size of the I/O region.
101	* @param use_addr Address where the final address for application's PIO	111	* @param use_addr Address where the final address for application's PIO
102	* will be stored.	112	* will be stored.
103	*	113	*
104	* @return Zero on success or negative error code.	114	* @return Zero on success or negative error code.
105	*/	115	*/
106	int pio_enable(void pio_addr, size_t size, void *use_addr)	116	int pio_enable(void pio_addr, size_t size, void *use_addr)
107	{	117	{
108	void *phys;	118	void *phys;
109	void *virt;	119	void *virt;
110	size_t offset;	120	size_t offset;
111	unsigned int pages;	121	unsigned int pages;
112		122
113	#ifdef IO_SPACE_BOUNDARY	123	#ifdef IO_SPACE_BOUNDARY
114	if (pio_addr < IO_SPACE_BOUNDARY) {	124	if (pio_addr < IO_SPACE_BOUNDARY) {
115	*use_addr = pio_addr;	125	*use_addr = pio_addr;
116	return iospace_enable(task_get_id(), pio_addr, size);	126	return iospace_enable(task_get_id(), pio_addr, size);
117	}	127	}
118	#endif	128	#endif
119		129
120	phys = ALIGN_DOWN((uintptr_t) pio_addr, PAGE_SIZE);	130	phys = ALIGN_DOWN((uintptr_t) pio_addr, PAGE_SIZE);
121	offset = pio_addr - phys;	131	offset = pio_addr - phys;
122	pages = ALIGN_UP(offset + size, PAGE_SIZE) >> PAGE_WIDTH;	132	pages = ALIGN_UP(offset + size, PAGE_SIZE) >> PAGE_WIDTH;
123	virt = as_get_mappable_page(pages);	133	virt = as_get_mappable_page(pages);
124	*use_addr = virt + offset;	134	*use_addr = virt + offset;
125	return physmem_map(phys, virt, pages, AS_AREA_READ \| AS_AREA_WRITE);	135	return physmem_map(phys, virt, pages, AS_AREA_READ \| AS_AREA_WRITE);
126	}	136	}
127		137
128	/** @}	138	/** @}
129	*/	139	*/
130		140