From 064cc6d1037fd74b3a1b0062bbe05d1211994684 Mon Sep 17 00:00:00 2001
From: kub <derkub@gmail.com>
Date: Fri, 22 Mar 2019 20:18:33 +0100
Subject: [PATCH] kludges for wwf raw, nfl

---
 cpu/sh2/compiler.c |  8 ++++++++
 pico/32x/memory.c  | 15 +++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/cpu/sh2/compiler.c b/cpu/sh2/compiler.c
index c6522f37..aa3e772c 100644
--- a/cpu/sh2/compiler.c
+++ b/cpu/sh2/compiler.c
@@ -4233,6 +4233,14 @@ void scan_block(u32 base_pc, int is_slave, u8 *op_flags, u32 *end_pc_out,
       if (opd->imm < end_pc + MAX_LITERAL_OFFSET) {
         if (end_literals < opd->imm + opd->size * 2)
           end_literals = opd->imm + opd->size * 2;
+        if (opd->size == 2) {
+          // tweak for NFL: treat a 32bit literal as an address and check if it
+          // points to the literal space. In that case handle it like MOVA. 
+          tmp = FETCH32(opd->imm) & ~0x20000000; // MUST ignore wt bit here
+          if (tmp >= end_pc && tmp < end_pc + MAX_LITERAL_OFFSET)
+            if (lowest_mova == 0 || tmp < lowest_mova)
+              lowest_mova = tmp;
+        }
       }
     }
   }
diff --git a/pico/32x/memory.c b/pico/32x/memory.c
index d815853d..c6b89a22 100644
--- a/pico/32x/memory.c
+++ b/pico/32x/memory.c
@@ -1487,6 +1487,20 @@ static void REGPARM(3) sh2_write16_da(u32 a, u32 d, SH2 *sh2)
   ((u16 *)sh2->data_array)[a1 / 2] = d;
 }
 
+static void REGPARM(3) sh2_write16_rom(u32 a, u32 d, SH2 *sh2)
+{
+  u32 a1 = a & 0x3fffff;
+  // tweak for WWF Raw: does writes to ROM area, and it doesn't work without
+  // allowing this.
+  // Presumably the write goes to the CPU cache and is read back from there,
+  // but it would be extremely costly to emulate cache behaviour. Just allow
+  // writes to that region, hoping that the original ROM values are never used.
+  if ((a1 & 0x3e0000) == 0x3e0000)
+    ((u16 *)sh2->p_rom)[a1 / 2] = d;
+  else
+    sh2_write16_unmapped(a, d, sh2);
+}
+
 
 typedef u32 (sh2_read_handler)(u32 a, SH2 *sh2);
 typedef void REGPARM(3) (sh2_write_handler)(u32 a, u32 d, SH2 *sh2);
@@ -1911,6 +1925,7 @@ void PicoMemSetup32x(void)
   bank_switch_rom_sh2();
   sh2_read8_map[0x02/2].mask  = sh2_read8_map[0x22/2].mask  =
   sh2_read16_map[0x02/2].mask = sh2_read16_map[0x22/2].mask = 0x3fffff; // FIXME
+  sh2_write16_map[0x02/2] = sh2_write16_map[0x22/2] = sh2_write16_rom;
   // CS2 - DRAM - done by Pico32xSwapDRAM()
   sh2_read8_map[0x04/2].mask  = sh2_read8_map[0x24/2].mask  =
   sh2_read16_map[0x04/2].mask = sh2_read16_map[0x24/2].mask = 0x01ffff;
-- 
2.39.2