From 627aa0c2c414f0dd445b8c762af1db379637f44a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Markus=20Fr=C3=B6schle?= <mfro@mubf.de>
Date: Sat, 2 Apr 2016 18:56:20 +0000
Subject: [PATCH] modify 1st page to cache mode PASSTHROUGH

---
 sys/BaS.c        | 3 ++-
 sys/exceptions.S | 2 +-
 sys/interrupts.c | 2 +-
 sys/mmu.c        | 4 ++--
 video/videl.c    | 2 +-
 5 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/sys/BaS.c b/sys/BaS.c
index 493a8e8..48190b9 100644
--- a/sys/BaS.c
+++ b/sys/BaS.c
@@ -223,6 +223,7 @@ void enable_coldfire_interrupts()
 
     MCF_EPORT_EPPAR = 0xaaa8;               /* all interrupts on falling edge */
 
+#ifdef _NOT_USED_
 #if defined(MACHINE_FIREBEE)
     /*
      * TIN0 on the Coldfire is connected to the FPGA. TIN0 triggers every write
@@ -235,7 +236,7 @@ void enable_coldfire_interrupts()
                      MCF_INTC_ICR_IP(6);    /* interrupt level 7, interrupt priority 7 */
     MCF_INTC_IMRH = 0xbffffffe;             /* psc3 and timer 0 int on */
 #endif
-
+#endif
     xprintf("finished\r\n");
 }
 
diff --git a/sys/exceptions.S b/sys/exceptions.S
index acc857d..dbedfd7 100644
--- a/sys/exceptions.S
+++ b/sys/exceptions.S
@@ -247,7 +247,7 @@ init_vec_loop:
 #ifdef MACHINE_FIREBEE
 
 // timer vectors (triggers when vbashi gets changed, used for video page copy)
-        move.l  a1,(INT_SOURCE_GPT0 + 64) * 4(a0)
+        // move.l  a1,(INT_SOURCE_GPT0 + 64) * 4(a0)
 #endif /* MACHINE_FIREBEE */
 
         move.l  (sp)+,a2                        // Restore registers
diff --git a/sys/interrupts.c b/sys/interrupts.c
index 5602783..eb5cbeb 100644
--- a/sys/interrupts.c
+++ b/sys/interrupts.c
@@ -477,7 +477,7 @@ bool irq7_handler(void)
  */
 bool gpt0_interrupt_handler(void *arg0, void *arg1)
 {
-    dbg("handler called\n\r");
+    dbg("gpt0 handler called\n\r");
 
     MCF_GPT0_GMS &= ~1;     /* rearm trigger */
     NOP();
diff --git a/sys/mmu.c b/sys/mmu.c
index 63dab07..b975ed8 100644
--- a/sys/mmu.c
+++ b/sys/mmu.c
@@ -679,7 +679,7 @@ void mmu_init(void)
 
     /* create locked TLB entries */
 
-    flags.cache_mode = CACHE_COPYBACK;
+    flags.cache_mode = CACHE_WRITETHROUGH;
     flags.supervisor_protect = 0;
     flags.read = 1;
     flags.write = 1;
@@ -687,7 +687,7 @@ void mmu_init(void)
     flags.locked = true;
 
     /* 0x00000000 - 0x00100000 (first MB of physical memory) locked virt = phys */
-    mmu_map_page(0x0, 0x0, MMU_PAGE_SIZE_1M, 0, &flags);
+    mmu_map_page(0x0, 0x60000000, MMU_PAGE_SIZE_1M, 0, &flags);
 
     /*
      * Make the TOS (in SDRAM) read-only
diff --git a/video/videl.c b/video/videl.c
index d508bae..5a6d69e 100644
--- a/video/videl.c
+++ b/video/videl.c
@@ -11,7 +11,7 @@
  * option any later version.  See doc/license.txt for details.
  */
 
-#define DBG_VIDEL
+// #define DBG_VIDEL
 #ifdef DBG_VIDEL
 #define dbg(format, arg...) do { xprintf("DEBUG: %s(): " format, __FUNCTION__, ##arg); } while (0)
 #else