From 3c2daf7277c56373327be4b62c0395d7a258f739 Mon Sep 17 00:00:00 2001
From: ariahiro64 <ariahiro64@gmail.com>
Date: Sat, 21 Oct 2023 02:28:26 -0400
Subject: [PATCH] fix large saves

---
 src/flashcart/ed64/ed64.c    |  2 ++
 src/flashcart/ed64/ed64_ll.c | 58 ++++++++++++++++++++++++++++++++++--
 2 files changed, 58 insertions(+), 2 deletions(-)

diff --git a/src/flashcart/ed64/ed64.c b/src/flashcart/ed64/ed64.c
index b3de5823..94006a02 100644
--- a/src/flashcart/ed64/ed64.c
+++ b/src/flashcart/ed64/ed64.c
@@ -80,6 +80,8 @@ static flashcart_err_t ed64_init (void) {
             current_state.last_save_path = "";
             ed64_state_save(&current_state);
         }
+        //clears rom/save sdram area
+        memset((void *)(ROM_ADDRESS), 0xFF, MiB(64) + KiB(128));
     }
     return FLASHCART_OK;
 }
diff --git a/src/flashcart/ed64/ed64_ll.c b/src/flashcart/ed64/ed64_ll.c
index 5b04eed5..973fca9d 100644
--- a/src/flashcart/ed64/ed64_ll.c
+++ b/src/flashcart/ed64/ed64_ll.c
@@ -1,5 +1,6 @@
 #include <malloc.h>
 #include <libdragon.h>
+#include "utils/utils.h"
 #include "ed64_ll.h"
 
 
@@ -220,6 +221,33 @@ void pi_dma_from_cart_safe (void *dest, void *src, unsigned long size) {
 
 }
 
+int ed64_ll_get_sram128 (uint8_t *buffer, int size) {
+
+    dma_wait();
+
+    io_write(PI_BSD_DOM2_LAT_REG, 0x05);
+    io_write(PI_BSD_DOM2_PWD_REG, 0x0C);
+    io_write(PI_BSD_DOM2_PGS_REG, 0x0D);
+    io_write(PI_BSD_DOM2_RLS_REG, 0x02);
+
+    dma_wait();
+
+    pi_initialize();
+
+    dma_wait();
+
+    pi_dma_from_sram(buffer, 0 - (KiB(128) - KiB(32)), size) ;
+
+    dma_wait();
+
+    io_write(PI_BSD_DOM2_LAT_REG, 0x40);
+    io_write(PI_BSD_DOM2_PWD_REG, 0x12);
+    io_write(PI_BSD_DOM2_PGS_REG, 0x07);
+    io_write(PI_BSD_DOM2_RLS_REG, 0x03);
+
+    return 1;
+
+}
 
 int ed64_ll_get_sram (uint8_t *buffer, int size) {
 
@@ -266,7 +294,7 @@ int ed64_ll_get_fram (uint8_t *buffer, int size) {
     ed64_ll_set_save_type(SAVE_TYPE_SRAM_128K); //2
     dma_wait();
 
-   ed64_ll_get_sram(buffer, size);
+    ed64_ll_get_sram128(buffer, size);
     data_cache_hit_writeback_invalidate(buffer, size);
 
     dma_wait();
@@ -279,6 +307,32 @@ int ed64_ll_get_fram (uint8_t *buffer, int size) {
 /*
 sram upload
 */
+
+int ed64_ll_set_sram128 (uint8_t *buffer, int size) {
+
+    //half working
+    dma_wait();
+    //Timing
+    pi_initialize_sram();
+
+    //Readmode
+    pi_initialize();
+
+    data_cache_hit_writeback_invalidate(buffer,size);
+    dma_wait();
+
+    pi_dma_to_sram(buffer, 0 - (KiB(128) - KiB(32)), size);
+    data_cache_hit_writeback_invalidate(buffer,size);
+
+    //Wait
+    dma_wait();
+    //Restore evd Timing
+    ed64_ll_set_sdcard_timing();
+
+    return 1;
+
+}
+
 int ed64_ll_set_sram (uint8_t *buffer, int size) {
 
     //half working
@@ -321,7 +375,7 @@ int ed64_ll_set_fram (uint8_t *buffer, int size) {
     ed64_ll_set_save_type(SAVE_TYPE_SRAM_128K);
     dma_wait();
 
-    ed64_ll_set_sram(buffer, size);
+    ed64_ll_set_sram128(buffer, size);
     data_cache_hit_writeback_invalidate(buffer, size);
 
     dma_wait();