Add arch-x86_64/include/machine.
This is basically the other half of I5de76f6c46ac87779f207d568a86bb453e2414de
from Pavel Chupin <pavel.v.chupin@intel.com>, but taking the exact upstream
_types.h instead of the modified version. (I was confused when I suggested
otherwise.)
I've also cleaned up the internal_types.h situation; we weren't gaining
anything from these empty files, and there is no upstream internal_types.h
for x86_64.
Change-Id: I802a9a6a8df1c979e820659212c75a47c2ef392e
diff --git a/libc/arch-x86_64/include/machine/fpu.h b/libc/arch-x86_64/include/machine/fpu.h
new file mode 100644
index 0000000..bda8f05
--- /dev/null
+++ b/libc/arch-x86_64/include/machine/fpu.h
@@ -0,0 +1,65 @@
+/* $OpenBSD: fpu.h,v 1.9 2011/03/23 16:54:34 pirofti Exp $ */
+/* $NetBSD: fpu.h,v 1.1 2003/04/26 18:39:40 fvdl Exp $ */
+
+#ifndef _MACHINE_FPU_H_
+#define _MACHINE_FPU_H_
+
+#include <sys/types.h>
+
+/*
+ * amd64 only uses the extended save/restore format used
+ * by fxsave/fsrestore, to always deal with the SSE registers,
+ * which are part of the ABI to pass floating point values.
+ * Must be stored in memory on a 16-byte boundary.
+ */
+
+struct fxsave64 {
+ u_int16_t fx_fcw;
+ u_int16_t fx_fsw;
+ u_int8_t fx_ftw;
+ u_int8_t fx_unused1;
+ u_int16_t fx_fop;
+ u_int64_t fx_rip;
+ u_int64_t fx_rdp;
+ u_int32_t fx_mxcsr;
+ u_int32_t fx_mxcsr_mask;
+ u_int64_t fx_st[8][2]; /* 8 normal FP regs */
+ u_int64_t fx_xmm[16][2]; /* 16 SSE2 registers */
+ u_int8_t fx_unused3[96];
+} __packed;
+
+struct savefpu {
+ struct fxsave64 fp_fxsave; /* see above */
+ u_int16_t fp_ex_sw; /* saved status from last exception */
+ u_int16_t fp_ex_tw; /* saved tag from last exception */
+};
+
+/*
+ * The i387 defaults to Intel extended precision mode and round to nearest,
+ * with all exceptions masked.
+ */
+#define __INITIAL_NPXCW__ 0x037f
+#define __INITIAL_MXCSR__ 0x1f80
+#define __INITIAL_MXCSR_MASK__ 0xffbf
+
+#ifdef _KERNEL
+/*
+ * XXX
+ */
+struct trapframe;
+struct cpu_info;
+
+extern uint32_t fpu_mxcsr_mask;
+
+void fpuinit(struct cpu_info *);
+void fpudrop(void);
+void fpudiscard(struct proc *);
+void fputrap(struct trapframe *);
+void fpusave_proc(struct proc *, int);
+void fpusave_cpu(struct cpu_info *, int);
+void fpu_kernel_enter(void);
+void fpu_kernel_exit(void);
+
+#endif
+
+#endif /* _MACHINE_FPU_H_ */