cdbd3865ac
With the base stored in dcr_host_t, there's no need for callers to pass the dcr_n into dcr_unmap(). In fact this removes the possibility of them passing the incorrect value, which would then be iounmap()'ed. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Jeff Garzik <jeff@garzik.org>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*
|
|
* (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
|
|
* <benh@kernel.crashing.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
|
* the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _ASM_POWERPC_DCR_MMIO_H
|
|
#define _ASM_POWERPC_DCR_MMIO_H
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/io.h>
|
|
|
|
typedef struct {
|
|
void __iomem *token;
|
|
unsigned int stride;
|
|
unsigned int base;
|
|
} dcr_host_t;
|
|
|
|
#define DCR_MAP_OK(host) ((host).token != NULL)
|
|
|
|
extern dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n,
|
|
unsigned int dcr_c);
|
|
extern void dcr_unmap(dcr_host_t host, unsigned int dcr_c);
|
|
|
|
static inline u32 dcr_read(dcr_host_t host, unsigned int dcr_n)
|
|
{
|
|
return in_be32(host.token + ((host.base + dcr_n) * host.stride));
|
|
}
|
|
|
|
static inline void dcr_write(dcr_host_t host, unsigned int dcr_n, u32 value)
|
|
{
|
|
out_be32(host.token + ((host.base + dcr_n) * host.stride), value);
|
|
}
|
|
|
|
extern u64 of_translate_dcr_address(struct device_node *dev,
|
|
unsigned int dcr_n,
|
|
unsigned int *stride);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_DCR_MMIO_H */
|
|
|
|
|