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| author | Amaan Cheval <amaan.cheval@gmail.com> | 2018-08-13 16:03:12 +0530 |
|---|---|---|
| committer | Joel Sherrill <joel@rtems.org> | 2018-08-13 10:48:20 -0500 |
| commit | 4544749e3c163c511a9a28992b3ac429515c0a5a (patch) | |
| tree | 34043f7607ab3931634efa12da7b1f922cda4479 /cpukit/score/cpu/x86_64 | |
| parent | bsps/x86_64: Reduce default RamSize to 1GiB (diff) | |
| download | rtems-4544749e3c163c511a9a28992b3ac429515c0a5a.tar.bz2 | |
bsps/x86_64: Add paging support with 1GiB super pages
Updates #2898.
Diffstat (limited to 'cpukit/score/cpu/x86_64')
| -rw-r--r-- | cpukit/score/cpu/x86_64/include/rtems/score/cpu_asm.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/cpukit/score/cpu/x86_64/include/rtems/score/cpu_asm.h b/cpukit/score/cpu/x86_64/include/rtems/score/cpu_asm.h index ac43a6366d..5d4b608eb8 100644 --- a/cpukit/score/cpu/x86_64/include/rtems/score/cpu_asm.h +++ b/cpukit/score/cpu/x86_64/include/rtems/score/cpu_asm.h @@ -45,6 +45,19 @@ RTEMS_INLINE_ROUTINE void outport_byte(uint16_t port, uint8_t val) __asm__ volatile ( "outb %0, %1" : : "a" (val), "Nd" (port) ); } + +RTEMS_INLINE_ROUTINE void amd64_set_cr3(uint64_t segment) +{ + __asm__ volatile ( "movq %0, %%cr3" : "=r" (segment) : "0" (segment) ); +} + +RTEMS_INLINE_ROUTINE void cpuid( + uint32_t code, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx +) { + __asm__ volatile ( "cpuid" + : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) + : "a" (code) ); +} #endif /* !ASM */ #endif |