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Added support for Pico Loader API v2. This makes it possible to return to Pico Launcher from homebrew.

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This commit is contained in:
Gericom
2026-01-10 17:08:06 +01:00
parent e4c2fafa74
commit d76d46ea73
4 changed files with 32 additions and 3 deletions
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16
arm9/source/picoLoaderBootstrap.cpp
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@@ -10,6 +10,7 @@
#include <libtwl/ipc/ipcFifoSystem.h>
#include "ipcChannels.h"
#include "fat/File.h"
#include "core/StringUtil.h"
#include "picoLoaderBootstrap.h"
#define PICO_LOADER_9_PATH "/_pico/picoLoader9.bin"
@@ -18,6 +19,7 @@
typedef void (*pico_loader_9_func_t)(void);
static pload_params_t sLoadParams;
static char sLauncherPath[256] alignas(32);
static PicoLoaderBootDrive sBootDrive;
pload_params_t* pload_getLoadParams()
@@ -30,6 +32,11 @@ void pload_setBootDrive(PicoLoaderBootDrive bootDrive)
sBootDrive = bootDrive;
}
void pload_setLauncherPath(const char* launcherPath)
{
StringUtil::Copy(sLauncherPath, launcherPath, sizeof(sLauncherPath));
}
void pload_start()
{
mem_setVramAMapping(MEM_VRAM_AB_LCDC);
@@ -78,8 +85,13 @@ void pload_start()
DC_InvalidateAll();
IC_InvalidateAll();
((pload_header7_t*)0x06840000)->bootDrive = sBootDrive;
dma_ntrCopy16(3, &sLoadParams, &((pload_header7_t*)0x06840000)->loadParams, sizeof(pload_params_t));
auto header = (pload_header7_t*)0x06840000;
header->bootDrive = sBootDrive;
dma_ntrCopy16(3, &sLoadParams, &header->loadParams, sizeof(pload_params_t));
if (header->apiVersion >= 2)
{
dma_ntrCopy16(3, &sLauncherPath, &header->v2.launcherPath, sizeof(header->v2.launcherPath));
}
mem_setVramCMapping(MEM_VRAM_C_ARM7_00000);
mem_setVramDMapping(MEM_VRAM_D_ARM7_20000);
ipc_sendFifoMessage(IPC_CHANNEL_LOADER, 1);