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parisc: Add dep_safe() macro to deposit a register in 32- and 64-kernels

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Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2022-05-17 17:03:01 +02:00
parent be6aee1392
commit cdd00fe6aa
1 changed files with 10 additions and 0 deletions
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10
arch/parisc/include/asm/assembly.h
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@ -174,6 +174,16 @@
#endif
.endm
/* The depw instruction leaves the most significant 32 bits of the
* target register in an undefined state on PA 2.0 systems. */
.macro dep_safe i, p, len, t
#ifdef CONFIG_64BIT
depd \i, 32+(\p), \len, \t
#else
depw \i, \p, \len, \t
#endif
.endm
/* load 32-bit 'value' into 'reg' compensating for the ldil
* sign-extension when running in wide mode.
* WARNING!! neither 'value' nor 'reg' can be expressions