diff options
Diffstat (limited to 'sys/boot/ia64/ski/ssc.c')
| -rw-r--r-- | sys/boot/ia64/ski/ssc.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/boot/ia64/ski/ssc.c b/sys/boot/ia64/ski/ssc.c index 11a91c8..e3e9eb2 100644 --- a/sys/boot/ia64/ski/ssc.c +++ b/sys/boot/ia64/ski/ssc.c @@ -29,14 +29,24 @@ #include <stand.h> #include "libski.h" +/* + * Ugh... Work around a bug in the Linux version of ski for SSC_GET_RTC. The + * PSR.dt register is not preserved properly and causes further memory + * references to be done without translation. All we need to do is preserve + * PSR.dt across the SSC call. We do this by saving and restoring psr.l + * completely. + */ u_int64_t ssc(u_int64_t in0, u_int64_t in1, u_int64_t in2, u_int64_t in3, int which) { + register u_int64_t psr; register u_int64_t ret0 __asm("r8"); + __asm __volatile("mov %0=psr;;" : "=r"(psr)); __asm __volatile("mov r15=%1\n\t" - "break 0x80000" + "break 0x80000;;" : "=r"(ret0) : "r"(which), "r"(in0), "r"(in1), "r"(in2), "r"(in3)); + __asm __volatile("mov psr.l=%0;; srlz.d" :: "r"(psr)); return ret0; } |
