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boot/x86_64: enable sse early

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Enable SSE as a part of the "preparation of the environment to run any
C or C++ code" in the entry points of stage2 bootloader.

SSE2 is going to be used by memset() and memcpy().

Signed-off-by: Paweł Dziepak <[email protected]>
This commit is contained in:
Paweł Dziepak
2014-09-14 19:16:52 +02:00
parent acad7bf64a
commit b41f281071
3 changed files with 19 additions and 8 deletions
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headers/private/kernel/arch/x86/arch_cpu.h
+8
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@@ -243,6 +243,14 @@
| X86_EFLAGS_AUXILIARY_CARRY | X86_EFLAGS_ZERO | X86_EFLAGS_SIGN \
| X86_EFLAGS_DIRECTION | X86_EFLAGS_OVERFLOW)
#define CR0_CACHE_DISABLE (1UL << 30)
#define CR0_NOT_WRITE_THROUGH (1UL << 29)
#define CR0_FPU_EMULATION (1UL << 2)
#define CR0_MONITOR_FPU (1UL << 1)
#define CR4_OS_FXSR (1UL << 9)
#define CR4_OS_XMM_EXCEPTION (1UL << 10)
// iframe types
#define IFRAME_TYPE_SYSCALL 0x1