kernel: fix gint[HWURAM] not being set on fx-9860G

When switching to dynamic TLB the counting of mapped memory was no
longer required at boot time. This was restored weirdly for fx-CG 50 and
not at all for fx-9860G; this is now fixed.

TODO

@@ -1,4 +1,5 @@
 Extensions on existing code:
+* stdio:     support %f in printf
 * project:   add license file
 * kernel:    group linker script symbols in a single header file
 * kernel:    be consistent about *tlb_mapped_memory() in hw_detect()
@@ -20,3 +21,5 @@ Future directions.
 * USB communication, using Yatis' reverse-engineering of the module
 * Make fx9860g projects work out of the box on fxcg50
 * Use the DSP to enhance parallel computation
+* Dynamic memory allocation
+* Base for Yatis' threads library

src/kernel/hardware.c

@@ -98,10 +98,12 @@ void hw_detect(void)
 	*R4 = b4;
 
 	gint[HWRAM]  = ext ? (512 << 10) : (256 << 10);
-	/* Will be detected later on */
-	gint[HWURAM] = -1;
 	/* Traditionally 4 MiB, Graph 35+E II has 8 MiB */
 	gint[HWROM]  = (gint[HWCALC] == HWCALC_G35PE2) ? (8 << 20) : (4 << 20);
+
+	/* Mapped memory */
+	if(isSH3()) tlb_mapped_memory(NULL, NULL);
+	else utlb_mapped_memory(NULL, NULL);
 }
 
 #endif /* FX9860G and platform-agnostic */
@@ -130,8 +132,7 @@ void hw_detect(void)
 	gint[HWROM] = (32 << 20);
 
 	/* Mapped memory */
-	if(isSH3()) tlb_mapped_memory(NULL, NULL);
+	utlb_mapped_memory(NULL, NULL);
-	else utlb_mapped_memory(NULL, NULL);
 }
 
 #endif /* FXCG50 */

src/render-cg/dvram.c

@@ -32,6 +32,7 @@ __attribute__((constructor))
 static void init_vram(void)
 {
 	/* On Prizm and fx-CG Manager, move address to 0xa8000000 */
+	/* TODO: Detect base RAM address in BSC rather than hardcoding it */
 	if(gint[HWCALC] == HWCALC_PRIZM || gint[HWCALC] == HWCALC_FXCG_MANAGER)
 	{
 		main = (void *)main - 0x04000000;