[sim/rx]

* README.txt: New.
* config.h (CYCLE_ACCURATE, CYCLE_STATS): New.
* configure.in (--enable-cycle-accurate, --enable-cycle-stats):
New.  Default to enabled.
* configure: Regenerate.

* cpu.h (regs_type): Add cycle tracking info.
(reset_pipeline_stats): Declare.
(halt_pipeline_stats): Declare.
(pipeline_stats): Declare.
* main.c (done): Call pipeline_stats().
* mem.h (rx_mem_ptr): Moved to here ...
* mem.c (mem_ptr): ... from here.  Rename throughout.
(mem_put_byte): Move LEDs to Port A.  Add Port B to control cycle
statistics.  Move UART to SCI4.
(mem_put_hi): Add TPU 1-2.  TPU 1 and 2 count CPU cycles.
* reg.c (init_regs): Set Rt reg to -1 (no reg).
* rx.c: Add cycle counting and statistics throughout.
(rx_get_byte): Optimize for speed.
(decode_opcode): Likewise.
(reset_pipeline_stats): New.
(halt_pipeline_stats): New.
(pipeline_stats): New.
* trace.c (sim_disasm_one): Print cycle count.

[include/opcode]
* rx.h (RX_Opcode_ID): Add nop2 and nop3 for statistics.

1 files changed, 15 insertions, 0 deletions

diff --git a/sim/rx/mem.h b/sim/rx/mem.h
index 1b8320a..37740d5 100644
--- a/sim/rx/mem.h
+++ b/sim/rx/mem.h
@@ -25,10 +25,25 @@ enum mem_content_type {
      MC_NUM_TYPES
 };
 
+enum mem_ptr_action
+{
+  MPA_WRITING,
+  MPA_READING,
+  MPA_CONTENT_TYPE
+};
+
 void init_mem (void);
 void mem_usage_stats (void);
 unsigned long mem_usage_cycles (void);
 
+/* rx_mem_ptr returns a pointer which is valid as long as the address
+   requested remains within the same page.  */
+#define PAGE_BITS 12
+#define PAGE_SIZE (1 << PAGE_BITS)
+#define NONPAGE_MASK (~(PAGE_SIZE-1))
+
+unsigned char *rx_mem_ptr (unsigned long address, enum mem_ptr_action action);
+
 void mem_put_qi (int address, unsigned char value);
 void mem_put_hi (int address, unsigned short value);
 void mem_put_psi (int address, unsigned long value);