Install: Hekate 8GB after copy (fuse >4GiB), dram_fuse helper, RAM test target

- Add dram_fuse.c/h for shared fuse-to-MiB mapping
- After successful update/clean install copy: if hekate_8gb.bin exists and
  fuse reports more than 4 GiB, copy to sd:/payload.bin and
  sd:/bootloader/update.bin, then remove source; otherwise remove helper only
- Makefile: make ram-test builds output/RAM-Test.bin (tools/ram_test_main.c)

Made-with: Cursor

source/dram_fuse.c

@@ -0,0 +1,46 @@
+/*
+ * DRAM capacity from fuse (SKU), not physical probe.
+ */
+
+#include "dram_fuse.h"
+#include <soc/fuse.h>
+#include <soc/hw_init.h>
+#include <soc/t210.h>
+
+static int mariko_dram_mib(u32 dram_id)
+{
+	switch (dram_id) {
+	case 9:
+	case 13:
+	case 18:
+	case 21:
+	case 23:
+	case 28:
+		return 8192;
+	default:
+		if (dram_id >= 3 && dram_id <= 28)
+			return 4096;
+		return -1;
+	}
+}
+
+static int erista_dram_mib(u32 dram_id)
+{
+	if (dram_id == 4)
+		return 6144;
+	if (dram_id <= 6)
+		return 4096;
+	return -1;
+}
+
+int dram_capacity_mib_from_fuse(void)
+{
+	u32 nid = fuse_read_dramid(false);
+	u32 chip = hw_get_chip_id();
+
+	if (chip == GP_HIDREV_MAJOR_T210)
+		return erista_dram_mib(nid);
+	if (chip == GP_HIDREV_MAJOR_T210B01)
+		return mariko_dram_mib(nid);
+	return -1;
+}

source/dram_fuse.h

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <utils/types.h>
+
+/* DRAM capacity in MiB from fuse DRAM ID + SoC (same table as RAM test payload). */
+int dram_capacity_mib_from_fuse(void);

source/install.c

@@ -3,6 +3,7 @@
  */
 
 #include "install.h"
+#include "dram_fuse.h"
 #include "fs.h"
 #include "version.h"
 #include "gfx.h"
@@ -618,6 +619,50 @@ int delete_path_list(const char* paths[], const char* description) {
     return (failed == 0) ? FR_OK : FR_DISK_ERR;
 }
 
+#define HEKATE_8GB_SRC  "sd:/bootloader/hekate_8gb.bin"
+#define PAYLOAD_BIN_DST "sd:/payload.bin"
+#define UPDATE_BIN_DST  "sd:/bootloader/update.bin"
+
+static void unlink_ignore_err(const char *path)
+{
+    FILINFO fno;
+    if (f_stat(path, &fno) != FR_OK)
+        return;
+    if (fno.fattrib & AM_RDO)
+        f_chmod(path, fno.fattrib & ~AM_RDO, AM_RDO);
+    f_unlink(path);
+}
+
+/* After pack copy: if >4 GiB fuse RAM, install 8GB Hekate to payload.bin + bootloader/update.bin; always remove hekate_8gb.bin when done or if not used. */
+static void install_hekate_8gb_post_copy(void)
+{
+    if (!install_path_exists(HEKATE_8GB_SRC))
+        return;
+
+    int mib = dram_capacity_mib_from_fuse();
+    if (mib > 4096) {
+        install_set_color(COLOR_CYAN);
+        gfx_printf("\nMehr als 4 GB RAM erkannt (Fuse). Die 8-GB-Hekate-Variante wird verwendet.\n");
+        gfx_printf("Kopiere nach payload.bin und bootloader/update.bin...\n");
+        install_set_color(COLOR_WHITE);
+
+        int r1 = file_copy(HEKATE_8GB_SRC, PAYLOAD_BIN_DST);
+        int r2 = file_copy(HEKATE_8GB_SRC, UPDATE_BIN_DST);
+        if (r1 == FR_OK && r2 == FR_OK) {
+            install_set_color(COLOR_GREEN);
+            gfx_printf("  [OK] Hekate 8 GB installiert.\n");
+            install_set_color(COLOR_WHITE);
+            unlink_ignore_err(HEKATE_8GB_SRC);
+        } else {
+            install_set_color(COLOR_ORANGE);
+            gfx_printf("  [WARN] Kopie fehlgeschlagen (payload: %d, update: %d). hekate_8gb.bin bleibt.\n", r1, r2);
+            install_set_color(COLOR_WHITE);
+        }
+    } else {
+        unlink_ignore_err(HEKATE_8GB_SRC);
+    }
+}
+
 // Main installation function
 int perform_installation(omninx_variant_t pack_variant, install_mode_t mode) {
     int res;
@@ -637,7 +682,9 @@ int perform_installation(omninx_variant_t pack_variant, install_mode_t mode) {
         install_set_color(COLOR_WHITE);
         res = update_mode_install(pack_variant);
         if (res != FR_OK) return res;
-        
+
+        install_hekate_8gb_post_copy();
+
         install_check_and_clear_screen_if_needed();
         // Remove staging directory (installed pack)
         res = cleanup_staging_directory(pack_variant);
@@ -676,7 +723,9 @@ int perform_installation(omninx_variant_t pack_variant, install_mode_t mode) {
         install_set_color(COLOR_WHITE);
         res = clean_mode_install(pack_variant);
         if (res != FR_OK) return res;
-        
+
+        install_hekate_8gb_post_copy();
+
         install_check_and_clear_screen_if_needed();
         // Remove staging directory (installed pack)
         res = cleanup_staging_directory(pack_variant);