20000317 sourceware import

1 files changed, 127 insertions, 0 deletions

diff --git a/libgloss/sparc/slite.h b/libgloss/sparc/slite.h
new file mode 100644
index 000000000..4762e3fb8
--- /dev/null
+++ b/libgloss/sparc/slite.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 1995, 1996 Cygnus Support
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#define STACK_SIZE 16 * 1024
+#define TRAP_STACK_SIZE 4 * 1024
+#define NUM_REGS 20
+
+#ifdef SL933
+#define NUMBER_OF_REGISTER_WINDOWS 6
+#else
+#define NUMBER_OF_REGISTER_WINDOWS 8
+#endif
+
+#if (NUMBER_OF_REGISTER_WINDOWS == 8)
+#define SPARC_PSR_CWP_MASK               0x07   /* bits  0 -  4 */
+#elif (NUMBER_OF_REGISTER_WINDOWS == 16)
+#define SPARC_PSR_CWP_MASK               0x0F   /* bits  0 -  4 */
+#elif (NUMBER_OF_REGISTER_WINDOWS == 32)
+#define SPARC_PSR_CWP_MASK               0x1F   /* bits  0 -  4 */
+#else
+#error "Unsupported number of register windows for this cpu"
+#endif
+
+/* The traptable has to be the first code in a boot PROM. */
+
+/*
+ *  Entry for traps which jump to a programmer-specified trap handler.
+ */
+ 
+#define TRAP(_handler)  \
+  sethi %hi(_handler), %l3 ; \
+  jmpl  %l3+%lo(_handler), %g0 ; \
+  mov   %wim, %l0 ; \
+  nop
+
+/* Unexcpected trap will halt the processor by forcing it to error state */
+#if 1
+#define BAD_TRAP ta 0; nop; nop; nop;
+#else
+#define BAD_TRAP \
+  mov   %psr, l0 ; \
+  mov   0x0, %o0 ; \
+  sethi %hi(SYM(bad_trap)), l4 ; \
+  jmp   l4+%lo(SYM(bad_trap));
+#endif
+
+/* Software trap. Treat as BAD_TRAP for the time being... */
+#if 1
+#define SOFT_TRAP BAD_TRAP
+#else
+#define SOFT_TRAP \
+  mov   $psr, $l0 ; \
+  mov   0x0, $o0 ; \
+  sethi $hi(SYM(soft_trap)), l4 ; \
+  jmp   l4+$lo(SYM(soft_trap));
+#endif
+
+#define PSR_INIT   0x10c0       /* Disable traps, set s and ps */
+#define TBR_INIT   0
+#define WIM_INIT   2
+#define SP_INIT    0x023ffff0
+
+/* Macros for reading and writing to arbitrary address spaces.  Note that ASI
+   must be a constant (sorry, but the SPARC can only specify ASIs as part of an
+   instruction.  */
+
+#define read_asi(ASI, LOC)                                              \
+  ({                                                                    \
+    unsigned int val;                                                   \
+    __asm__ volatile ("lda [%r1]%2,%0" : "=r" (val) : "rJ" (LOC), "I" (ASI)); \
+    val;                                                                \
+  })
+
+#define write_asi(ASI, LOC, VAL) \
+  __asm__ volatile ("sta %0,[%r1]%2" : : "r" (VAL), "rJ" (LOC), "I" (ASI));
+
+/*
+ * Use this when modifying registers that cause memory to be modified.  This
+ * will cause GCC to reload all values after this point.
+ */
+#define write_asi_volatile(ASI, LOC, VAL) \
+  __asm__ volatile ("sta %0,[%r1]%2" : : "r" (VAL), "rJ" (LOC), "I" (ASI) \
+                    : "memory");
+
+#define	WRITE_PC(x)	registers[PC] = x; registers[NPC] = x + 4;
+
+/*
+ *		Processor Status Register (psr)
+ *
+ * 31	28|27	24|23	20|19	12|11	9|7|6|5|4	0
+ * +------+-------+-------+-------+------+-+-+-+--------+
+ * | impl |  ver  |  icc  | res.  | pil  | | | |  cwp   |
+ * +------+-------+-------+-------+------+-+-+-+--------+
+ *					  S P E
+ *					    S T
+ * if ET = 1, traps are enabled, 0 means disabled.
+ * if S = 1, you're in supervisor mode, 0 means user mode.
+ * cwp points to the current window.
+ *
+ *		Trap Base Register (tbr)
+ *
+ * 31		12|11 		4|3	0
+ * +--------------+--------------+------+
+ * |	tba	  |   	 tt	 | null	|
+ * +--------------+--------------+------+
+ *
+ * tba contains the most sig. 20 bits of the tbr base address
+ * tt is the trap number.
+ * 
+ *		Window Invalid Register (wim)
+ * 31		8| 7| 6| 5| 4| 3| 2| 1|  0
+ * +-------------+--+--+--+--+--+--+--+--+
+ * |   res.      |w7|w6|w5|w4|w3|w2|w1|w0|
+ * +-------------+--+--+--+--+--+--+--+--+
+ */
+