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ee41eea947
The 4xx bootwrapper occasionally needs to access SPR registers, this adds mfspr/mtspr wrappers to it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
31 lines
831 B
C
31 lines
831 B
C
#ifndef _PPC_BOOT_REG_H
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#define _PPC_BOOT_REG_H
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/*
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* Copyright 2007 Davud Gibson, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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static inline u32 mfpvr(void)
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{
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u32 pvr;
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asm volatile ("mfpvr %0" : "=r"(pvr));
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return pvr;
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}
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#define __stringify_1(x) #x
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#define __stringify(x) __stringify_1(x)
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#define mfspr(rn) ({unsigned long rval; \
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asm volatile("mfspr %0," __stringify(rn) \
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: "=r" (rval)); rval; })
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#define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
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register void *__stack_pointer asm("r1");
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#define get_sp() (__stack_pointer)
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#endif /* _PPC_BOOT_REG_H */
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