diff options
| author |   Anton Blanchard <anton@samba.org> | 2006-06-10 20:18:39 +1000 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2006-06-15 19:31:25 +1000 |
| commit | 3a2c48cfc97f9046abbd810f1efb1aa824bcfaf1 (patch) | |
| tree | afcd54f2ad36353abcf2282fdf15a05e77fcba4a /include/asm-powerpc | |
| parent | [POWERPC] Editable kernel command-line in zImage binary. (diff) | |
| download | linux-dev-3a2c48cfc97f9046abbd810f1efb1aa824bcfaf1.tar.xz linux-dev-3a2c48cfc97f9046abbd810f1efb1aa824bcfaf1.zip | |
[POWERPC] 64bit FPSCR support
Forthcoming machines will extend the FPSCR to 64 bits. We already
had a 64-bit save area for the FPSCR, but we need to use a new form
of the mtfsf instruction. Fortunately this new form is decoded as
an ordinary mtfsf by existing 64-bit processors.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/reg.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-powerpc/reg.h b/include/asm-powerpc/reg.h index 3779b21a7c71..bfc7dc14ffcc 100644 --- a/include/asm-powerpc/reg.h +++ b/include/asm-powerpc/reg.h @@ -499,6 +499,19 @@ #define MMCR0_PMC2_LOADMISSTIME 0x5 #endif +/* + * An mtfsf instruction with the L bit set. On CPUs that support this a + * full 64bits of FPSCR is restored and on other CPUs it is ignored. + * + * Until binutils gets the new form of mtfsf, hardwire the instruction. + */ +#ifdef CONFIG_PPC64 +#define MTFSF_L(REG) \ + .long (0xfc00058e | ((0xff) << 17) | ((REG) << 11) | (1 << 25)) +#else +#define MTFSF_L(REG) mtfsf 0xff, (REG) +#endif + /* Processor Version Register (PVR) field extraction */ #define PVR_VER(pvr) (((pvr) >> 16) & 0xFFFF) /* Version field */ |