From 063386dcd2dd92d86c9657dab832cca6c1ad9850 Mon Sep 17 00:00:00 2001
From: Lephenixnoir <sebastien.michelland@protonmail.com>
Date: Sat, 18 Sep 2021 16:04:57 +0200
Subject: [PATCH] discover and dump 8 MB RAM on fx-CG 50

---
 assets-fx/img/opt_dump.png | Bin 2597 -> 3020 bytes
 src/gint/dump.c            |  42 +++++++++++++++++++++++++++++++------
 src/gint/ram.c             |  33 ++++++++++++++++-------------
 3 files changed, 54 insertions(+), 21 deletions(-)

diff --git a/assets-fx/img/opt_dump.png b/assets-fx/img/opt_dump.png
index 46a22122150565f143b90db86fd40c6ec703b3f5..7415b3f1e93921092a6661e4560216624030e326 100644
GIT binary patch
delta 2987
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diff --git a/src/gint/dump.c b/src/gint/dump.c
index 2184663..0f1fc91 100644
--- a/src/gint/dump.c
+++ b/src/gint/dump.c
@@ -3,6 +3,8 @@
 #include <gint/bfile.h>
 #include <gint/gint.h>
 #include <gint/hardware.h>
+#include <gint/usb.h>
+#include <gint/usb-ff-bulk.h>
 
 #include <gintctl/util.h>
 #include <gintctl/gint.h>
@@ -25,7 +27,8 @@ static struct region const regs[] = {
 
 	#ifdef FXCG50
 	{ "ROM",    0x80000000, 0x81ffffff, 32 },
-	{ "RAM",    0x88000000, 0x881fffff, 2 },
+	{ "RAM_88", 0x88000000, 0x881fffff, 2 },
+	{ "RAM_8C", 0x8c000000, 0x8c7fffff, 8 },
 	{ "RS",     0xfd800000, 0xfd8007ff, 1 },
 	#endif
 };
@@ -65,7 +68,7 @@ static void switch_dump(int region, int segment, char *filename, int *retcode)
 	BFile_Close(fd);
 }
 
-static int do_dump(int region, int segment)
+static int do_dump_smem(int region, int segment)
 {
 	char filename[30];
 	int retcode = 0;
@@ -76,6 +79,29 @@ static int do_dump(int region, int segment)
 	return retcode;
 }
 
+static void do_dump_usb(int region)
+{
+	bool open = usb_is_open();
+	if(!open) {
+		usb_interface_t const *interfaces[] = { &usb_ff_bulk, NULL };
+		usb_open(interfaces, GINT_CALL_NULL);
+		usb_open_wait();
+	}
+
+	int size = regs[region].end - regs[region].start + 1;
+
+	usb_fxlink_header_t header;
+	usb_fxlink_fill_header(&header, "gintctl", "dump", size);
+
+	int pipe = usb_ff_bulk_output();
+	usb_write_sync(pipe, &header, sizeof header, 4, false);
+	usb_write_sync(pipe, (void *)regs[region].start, size, 4, false);
+	usb_commit_sync(pipe);
+
+	/* Close the USB link if it wasn't open before */
+	if(!open) usb_close();
+}
+
 /* gintctl_gint_dump(): Dump memory to filesystem */
 void gintctl_gint_dump(void)
 {
@@ -121,9 +147,11 @@ void gintctl_gint_dump(void)
 		if(retcode < 0)  row_print(5, 1, "Error %d", retcode);
 
 		fkey_button(1, "ROM");
-		fkey_button(2, "RAM");
-		fkey_button(3, "RS");
-		fkey_action(6, "DUMP");
+		fkey_button(2, "RAM_88");
+		fkey_button(3, "RAM_8C");
+		fkey_button(4, "RS");
+		fkey_action(5, "USB");
+		fkey_action(6, "SMEM");
 		#endif
 
 		dupdate();
@@ -134,6 +162,7 @@ void gintctl_gint_dump(void)
 		if(key == KEY_F1) select = 0;
 		if(key == KEY_F2) select = 1;
 		if(key == KEY_F3) select = 2;
+		if(key == KEY_F4 && _(0,1)) select = 3;
 
 		if(select >= 0 && select == region)
 		{
@@ -146,6 +175,7 @@ void gintctl_gint_dump(void)
 		}
 
 		retcode = 0;
-		if(key == KEY_F6) retcode = do_dump(region, segment);
+		if(key == KEY_F5) do_dump_usb(region);
+		if(key == KEY_F6) retcode = do_dump_smem(region, segment);
 	}
 }
diff --git a/src/gint/ram.c b/src/gint/ram.c
index ade99a5..a09aa61 100644
--- a/src/gint/ram.c
+++ b/src/gint/ram.c
@@ -86,6 +86,8 @@ struct region {
 	uint32_t mem;
 	/* Whether region supports only 32-bit access [input] */
 	bool use_lword;
+	/* How often to probe memory (1 in step_size bytes will be tested) */
+	int step_size;
 	/* Size of region [output] */
 	uint32_t size;
 	/* Reason why region is not larger [output] */
@@ -97,7 +99,7 @@ static void explore_region(struct region *r)
 	uint8_t volatile *mem = (void *)r->mem;
 	r->size = 0;
 
-	while(r->size < (1 << 20))
+	while(r->size < (16 << 20))
 	{
 		int x = r->use_lword
 			? writable_lword(mem + r->size)
@@ -115,8 +117,7 @@ static void explore_region(struct region *r)
 			if(y) return;
 		}
 
-		/* In PXYRAM, skip some longwords to go faster */
-		r->size += r->use_lword ? 32 : 4;
+		r->size += r->step_size;
 	}
 
 	r->reason = 3;
@@ -200,7 +201,7 @@ static void show_region(int y, struct region *r)
 	row_print(y,  2, "%s", r->name);
 	row_print(y,  9, "%08X", r->mem);
 	row_print(y, 18, "%d", r->use_lword ? 32 : 8);
-	row_print(y, 22, "%d bytes", r->size);
+	row_print(y, 22, "%d %s", r->size, r->size >= (1000000) ? "B" : "bytes");
 	row_print(y, 35, reasons[r->reason]);
 }
 #endif
@@ -209,17 +210,18 @@ static void show_region(int y, struct region *r)
 void gintctl_gint_ram(void)
 {
 	struct region r[] = {
-		{ "ILRAM", 0xe5200000, false, 0, 0 },
-		{ "XRAM",  0xe5007000, false, 0, 0 },
-		{ "YRAM",  0xe5017000, false, 0, 0 },
-		{ "PRAM0", 0xfe200000, true,  0, 0 },
-		{ "XRAM0", 0xfe240000, true,  0, 0 },
-		{ "YRAM0", 0xfe280000, true,  0, 0 },
-		{ "PRAM1", 0xfe300000, true,  0, 0 },
-		{ "XRAM1", 0xfe340000, true,  0, 0 },
-		{ "YRAM1", 0xfe380000, true,  0, 0 },
-		{ "X_P2",  0xa5007000, false, 0, 0 },
-		{ "URAM",  0xa55f0000, false, 0, 0 },
+		{ "ILRAM", 0xe5200000, false,    4, /**/ 0, 0 },
+		{ "XRAM",  0xe5007000, false,    4, /**/ 0, 0 },
+		{ "YRAM",  0xe5017000, false,    4, /**/ 0, 0 },
+		{ "PRAM0", 0xfe200000, true,    32, /**/ 0, 0 },
+		{ "XRAM0", 0xfe240000, true,    32, /**/ 0, 0 },
+		{ "YRAM0", 0xfe280000, true,    32, /**/ 0, 0 },
+		{ "PRAM1", 0xfe300000, true,    32, /**/ 0, 0 },
+		{ "XRAM1", 0xfe340000, true,    32, /**/ 0, 0 },
+		{ "YRAM1", 0xfe380000, true,    32, /**/ 0, 0 },
+		{ "X_P2",  0xa5007000, false,    4, /**/ 0, 0 },
+		{ "URAM",  0xa55f0000, false,    4, /**/ 0, 0 },
+		{ "RAM",   0xac000000, false, 1024, /**/ 0, 0 },
 		{ NULL },
 	};
 
@@ -307,6 +309,7 @@ void gintctl_gint_ram(void)
 		{
 			explore_region(&r[9]);
 			explore_region(&r[10]);
+			explore_region(&r[11]);
 		}
 
 		#ifdef FX9860G