expose more platform-agnostic code

May be useful later on for libraries such as libprof.

TODO

@@ -10,10 +10,12 @@ Tests to run.
 * topti:     all charsets
 
 Complementary elements on existing code.
+* core:      make it possiblé to catch exceptions (gintctl's memory browser)
+* core:      check if -DX still works in GCC 9 and if not, put spaces
 * gray:      find good values for more models than the Graph 35+E II
 * render:    get rid of GINT_NEED_VRAM and #define vram gint_vram if you need
 * dma:       dma_memcpy() and dma_memset(), possibly requiring alignment
-* core:      find the #ifdef FX9860G|FXCG50 that have a cross-platform def
+* dma:       maybe relax the 4-byte size constraint for dma_memset()
 * core:      try to leave add-in without reset in case of fatal exception
 * topti:     support Unicode fonts
 * hardware:  fill in the HWMEM_FITTLB flag

include/gint/drivers.h

@@ -105,12 +105,10 @@ typedef struct
    This macro makes its argument NULL on fxcg50, this way the named function
    can be defined under #ifdef FX9860G while keeping the structure clean. */
 
-#ifdef FX9860G
-#define GINT_DRIVER_SH3(name) name
-#endif
-
 #ifdef FXCG50
 #define GINT_DRIVER_SH3(name) NULL
+#else
+#define GINT_DRIVER_SH3(name) name
 #endif
 
 /* GINT_DRIVER_STATUS() - declare a function for status string generation

src/core/hardware.c

@@ -16,7 +16,7 @@ GBSS uint32_t gint[HW_KEYS];
 /* Product Register */
 #define PRR (*((volatile uint32_t *)0xff000044))
 
-#ifdef FX9860G
+#if defined(FX9860G) || (!defined(FX9860G) && !defined(FXCG50))
 
 /* mpu_detect() - detect the underlying MPU
    Many thanks to Simon Lothar for relevant documentation.
@@ -90,7 +90,7 @@ void hw_detect(void)
 	gint[HWROM]  = (gint[HWCALC] == HWCALC_G35PE2) ? (4 << 20) : (8 << 20);
 }
 
-#endif /* FX9860G */
+#endif /* FX9860G and platform-agnostic */
 
 #ifdef FXCG50
 

src/cpg/cpg.c

@@ -25,7 +25,7 @@ const clock_frequency_t *clock_freq(void)
 //	SH7705 Clock signals
 //---
 
-#ifdef FX9860G
+#if defined(FX9860G) || (!defined(FX9860G) && !defined(FXCG50))
 #define CPG SH7705_CPG
 
 static void sh7705_probe(void)
@@ -69,7 +69,7 @@ static void sh7705_probe(void)
 }
 
 #undef CPG
-#endif /* FX9860G */
+#endif /* FX9860G and platform-agnostic */
 
 //---
 //	SH7305 clock signals
@@ -144,7 +144,7 @@ static void init(void)
 
 	/* This avoids warnings about sh7705_probe() being undefined when
 	   building for fxcg50 */
-	#ifdef FX9860G
+	#if defined(FX9860G) || (!defined(FX9860G) && !defined(FXCG50))
 	isSH3() ? sh7705_probe() :
 	#endif
 	sh7305_probe();

src/rtc/rtc.c

@@ -125,7 +125,7 @@ void rtc_stop_timer(void)
 //	Driver initialization
 //---
 
-#ifdef FX9860G
+#if defined(FX9860G) || (!defined(FX9860G) && !defined(FXCG50))
 static void driver_sh3(void)
 {
 	/* Adjust the address of the RTC */