From: Ben Gras <ben@minix3.org>
Date: Wed, 2 Dec 2009 16:35:05 +0000 (+0000)
Subject: Part of the FPU changes; forgot to add these files in FPU commit.
X-Git-Tag: v3.1.6~174
X-Git-Url: http://zhaoyanbai.com/repos/nslookup.html?a=commitdiff_plain;h=38fecc5de1c0cdea991aedf64865c6141f560724;p=minix.git

Part of the FPU changes; forgot to add these files in FPU commit.
---

diff --git a/include/sys/fpu.h b/include/sys/fpu.h
new file mode 100644
index 000000000..42bda9840
--- /dev/null
+++ b/include/sys/fpu.h
@@ -0,0 +1,50 @@
+#ifndef FPU_H
+#define FPU_H
+
+/* x87 FPU state, MMX Technolodgy.
+ * 108 bytes.*/
+struct fpu_regs_s {
+	u16_t fp_control;     /* control */
+	u16_t fp_unused_1;
+	u16_t fp_status;      /* status */
+	u16_t fp_unused_2;
+	u16_t fp_tag;         /* register tags */
+	u16_t fp_unused_3;
+	u32_t fp_eip;         /* eip at failed instruction */
+	u16_t fp_cs;          /* cs at failed instruction */
+	u16_t fp_opcode;      /* opcode of failed instruction */
+	u32_t fp_dp;          /* data address */
+	u16_t fp_ds;          /* data segment */
+	u16_t fp_unused_4;
+	u16_t fp_st_regs[8][5]; /* 8 80-bit FP registers */
+};
+
+/* x87 FPU, MMX Technolodgy and SSE state.
+ * 512 bytes (if you need size use FPU_XFP_SIZE). */
+struct xfp_save {
+	u16_t fp_control;       /* control */
+	u16_t fp_status;        /* status */
+	u16_t fp_tag;           /* register tags */
+	u16_t fp_opcode;        /* opcode of failed instruction */
+	u32_t fp_eip;           /* eip at failed instruction */
+	u16_t fp_cs;            /* cs at failed instruction */
+	u16_t fp_unused_1;
+	u32_t fp_dp;            /* data address */
+	u16_t fp_ds;            /* data segment */
+	u16_t fp_unused_2;
+	u32_t fp_mxcsr;         /* MXCSR */
+	u32_t fp_mxcsr_mask;    /* MXCSR_MASK */
+	u16_t fp_st_regs[8][8];   /* 128 bytes for ST/MM regs */
+	u32_t fp_xreg_word[32]; /* space for 8 128-bit XMM registers */
+	u32_t fp_padding[56];
+};
+
+/* Size of xfp_save structure. */
+#define FPU_XFP_SIZE		512
+
+union fpu_state_u {
+	struct fpu_regs_s fpu_regs;
+	struct xfp_save xfp_regs;
+};
+
+#endif /* #ifndef FPU_H */
diff --git a/include/sys/stackframe.h b/include/sys/stackframe.h
new file mode 100644
index 000000000..a1b16e58e
--- /dev/null
+++ b/include/sys/stackframe.h
@@ -0,0 +1,36 @@
+#ifndef STACK_FRAME_H
+#define STACK_FRAME_H
+
+typedef unsigned reg_t;         /* machine register */
+typedef reg_t segdesc_t;
+
+/* The stack frame layout is determined by the software, but for efficiency
+ * it is laid out so the assembly code to use it is as simple as possible.
+ * 80286 protected mode and all real modes use the same frame, built with
+ * 16-bit registers.  Real mode lacks an automatic stack switch, so little
+ * is lost by using the 286 frame for it.  The 386 frame differs only in
+ * having 32-bit registers and more segment registers.  The same names are
+ * used for the larger registers to avoid differences in the code.
+ */
+struct stackframe_s {
+	u16_t gs;                     /* last item pushed by save */
+	u16_t fs;                     /*  ^ */
+	u16_t es;                     /*  | */
+	u16_t ds;                     /*  | */
+	reg_t di;                     /* di through cx are not accessed in C */
+	reg_t si;                     /* order is to match pusha/popa */
+	reg_t fp;                     /* bp */
+	reg_t st;                     /* hole for another copy of sp */
+	reg_t bx;                     /*  | */
+	reg_t dx;                     /*  | */
+	reg_t cx;                     /*  | */
+	reg_t retreg;                 /* ax and above are all pushed by save */
+	reg_t retadr;                 /* return address for assembly code save() */
+	reg_t pc;                     /*  ^  last item pushed by interrupt */
+	reg_t cs;                     /*  | */
+	reg_t psw;                    /*  | */
+	reg_t sp;                     /*  | */
+	reg_t ss;                     /* these are pushed by CPU during interrupt */
+};
+
+#endif /* #ifndef STACK_FRAME_H */