mirror of
https://github.com/adulau/aha.git
synced 2024-12-29 12:16:20 +00:00
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>
30 lines
831 B
C
30 lines
831 B
C
#ifndef _PPC_BOOT_REG_H
|
|
#define _PPC_BOOT_REG_H
|
|
/*
|
|
* Copyright 2007 Davud Gibson, IBM Corporation.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
static inline u32 mfpvr(void)
|
|
{
|
|
u32 pvr;
|
|
asm volatile ("mfpvr %0" : "=r"(pvr));
|
|
return pvr;
|
|
}
|
|
|
|
#define __stringify_1(x) #x
|
|
#define __stringify(x) __stringify_1(x)
|
|
|
|
#define mfspr(rn) ({unsigned long rval; \
|
|
asm volatile("mfspr %0," __stringify(rn) \
|
|
: "=r" (rval)); rval; })
|
|
#define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : : "r" (v))
|
|
|
|
register void *__stack_pointer asm("r1");
|
|
#define get_sp() (__stack_pointer)
|
|
|
|
#endif /* _PPC_BOOT_REG_H */
|