patch-2.4.20 linux-2.4.20/arch/mips/math-emu/dsemul.h

• Lines: 24
• Date: Thu Nov 28 15:53:10 2002
• Orig file: linux-2.4.19/arch/mips/math-emu/dsemul.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/arch/mips/math-emu/dsemul.h linux-2.4.20/arch/mips/math-emu/dsemul.h
@@ -0,0 +1,23 @@
+typedef long gpreg_t;
+typedef void *vaddr_t;
+
+#define REG_TO_VA (vaddr_t)
+#define VA_TO_REG (gpreg_t)
+
+int mips_dsemul(struct pt_regs *regs, mips_instruction ir, gpreg_t cpc);
+int do_dsemulret(struct pt_regs *xcp);
+
+/* Instruction which will always cause an address error */
+#define AdELOAD 0x8c000001	/* lw $0,1($0) */
+/* Instruction which will plainly cause a CP1 exception when FPU is disabled */
+#define CP1UNDEF 0x44400001    /* cfc1 $0,$0 undef  */
+
+/* Instruction inserted following the badinst to further tag the sequence */
+#define BD_COOKIE 0x0000bd36 /* tne $0,$0 with baggage */
+
+/* Setup which instruction to use for trampoline */
+#ifdef STANDALONE_EMULATOR
+#define BADINST CP1UNDEF
+#else
+#define BADINST AdELOAD
+#endif