0b94a1eeee
In its current form, dcr_map() doesn't remember the base address you passed it, which means you need to store it somewhere else. Rather than adding the base to another struct it seems simpler to store it in the dcr_host_t. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*
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* (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
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* <benh@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _ASM_POWERPC_DCR_NATIVE_H
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#define _ASM_POWERPC_DCR_NATIVE_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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typedef struct {
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unsigned int base;
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} dcr_host_t;
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#define DCR_MAP_OK(host) (1)
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#define dcr_map(dev, dcr_n, dcr_c) ((dcr_host_t){ .base = (dcr_n) })
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#define dcr_unmap(host, dcr_n, dcr_c) do {} while (0)
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#define dcr_read(host, dcr_n) mfdcr(dcr_n)
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#define dcr_write(host, dcr_n, value) mtdcr(dcr_n, value)
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/* Device Control Registers */
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void __mtdcr(int reg, unsigned int val);
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unsigned int __mfdcr(int reg);
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#define mfdcr(rn) \
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({unsigned int rval; \
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if (__builtin_constant_p(rn)) \
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asm volatile("mfdcr %0," __stringify(rn) \
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: "=r" (rval)); \
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else \
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rval = __mfdcr(rn); \
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rval;})
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#define mtdcr(rn, v) \
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do { \
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if (__builtin_constant_p(rn)) \
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asm volatile("mtdcr " __stringify(rn) ",%0" \
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: : "r" (v)); \
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else \
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__mtdcr(rn, v); \
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} while (0)
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/* R/W of indirect DCRs make use of standard naming conventions for DCRs */
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#define mfdcri(base, reg) \
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({ \
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mtdcr(base ## _CFGADDR, base ## _ ## reg); \
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mfdcr(base ## _CFGDATA); \
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})
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#define mtdcri(base, reg, data) \
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do { \
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mtdcr(base ## _CFGADDR, base ## _ ## reg); \
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mtdcr(base ## _CFGDATA, data); \
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} while (0)
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_DCR_NATIVE_H */
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