From 8f9a2edd1a1f6462c9f658e682da61df55fadcea Mon Sep 17 00:00:00 2001
From: smea <smealum@gmail.com>
Date: Tue, 23 Dec 2014 21:05:55 -0800
Subject: [PATCH] additional HB stuff

---
 libctru/include/3ds/services/hb.h | 11 +++++++++++
 libctru/source/services/hb.c      | 15 +++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/libctru/include/3ds/services/hb.h b/libctru/include/3ds/services/hb.h
index 4c9db57..e71dd0f 100644
--- a/libctru/include/3ds/services/hb.h
+++ b/libctru/include/3ds/services/hb.h
@@ -10,7 +10,18 @@
 Result initHb();
 void exitHb();
 
+// flushes/invalidates entire data/instruction cache
+// can be useful when writing code to executable pages
+Result HB_FlushInvalidateCache(void);
+
+// fetches the address for ninjhax bootloader addresses, useful for running 3dsx executables
+// void (*callBootloader)(Handle hb, Handle file);
+// void (*setArgs)(u32* src, u32 length);
 Result HB_GetBootloaderAddresses(void** load3dsx, void** setArgv);
+
+// changes the permissions of a given number of pages at address addr to mode
+// should it fail, the appropriate kernel error code will be returned and *reprotectedPages (if not NULL)
+// will be set to the number of sequential pages which were successfully reprotected + 1
 Result HB_ReprotectMemory(u32* addr, u32 pages, u32 mode, u32* reprotectedPages);
 
 #endif
diff --git a/libctru/source/services/hb.c b/libctru/source/services/hb.c
index 8221a4e..cf21f07 100644
--- a/libctru/source/services/hb.c
+++ b/libctru/source/services/hb.c
@@ -15,6 +15,21 @@ void exitHb()
 	svcCloseHandle(hbHandle);
 }
 
+Result HB_FlushInvalidateCache(void)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x00010042;
+	cmdbuf[1] = 0x00000000;
+	cmdbuf[2] = 0x00000000;
+	cmdbuf[3] = 0xFFFF8001;
+
+	if((ret = svcSendSyncRequest(hbHandle))!=0) return ret;
+	
+	return (Result)cmdbuf[1];
+}
+
 Result HB_GetBootloaderAddresses(void** load3dsx, void** setArgv)
 {
 	Result ret = 0;