| 1 | |
| 2 | #include "3ds_utils.h" |
| 3 | |
| 4 | #define GET_VERSION_MAJOR(version) ((version) >>24) |
| 5 | |
| 6 | typedef int (*ctr_callback_type)(void); |
| 7 | |
| 8 | int srvGetServiceHandle(unsigned int* out, const char* name); |
| 9 | int svcCloseHandle(unsigned int handle); |
| 10 | int svcBackdoor(ctr_callback_type); |
| 11 | int32_t svcGetSystemInfo(int64_t* out, uint32_t type, int32_t param); |
| 12 | void ctr_clear_cache(void); |
| 13 | |
| 14 | static int has_rosalina; |
| 15 | |
| 16 | void check_rosalina(void) { |
| 17 | int64_t version; |
| 18 | uint32_t major; |
| 19 | |
| 20 | has_rosalina = 0; |
| 21 | |
| 22 | if (!svcGetSystemInfo(&version, 0x10000, 0)) { |
| 23 | major = GET_VERSION_MAJOR(version); |
| 24 | |
| 25 | if (major >= 8) |
| 26 | has_rosalina = 1; |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | static void ctr_enable_all_svc_kernel(void) |
| 31 | { |
| 32 | __asm__ volatile("cpsid aif"); |
| 33 | |
| 34 | unsigned int* svc_access_control = *(*(unsigned int***)0xFFFF9000 + 0x22) - 0x6; |
| 35 | |
| 36 | svc_access_control[0]=0xFFFFFFFE; |
| 37 | svc_access_control[1]=0xFFFFFFFF; |
| 38 | svc_access_control[2]=0xFFFFFFFF; |
| 39 | svc_access_control[3]=0x3FFFFFFF; |
| 40 | } |
| 41 | |
| 42 | static void ctr_enable_all_svc(void) |
| 43 | { |
| 44 | svcBackdoor((ctr_callback_type)ctr_enable_all_svc_kernel); |
| 45 | } |
| 46 | |
| 47 | static void ctr_clean_invalidate_kernel(void) |
| 48 | { |
| 49 | __asm__ volatile( |
| 50 | "mrs r1, cpsr\n" |
| 51 | "cpsid aif\n" // disable interrupts |
| 52 | "mov r0, #0\n" |
| 53 | "mcr p15, 0, r0, c7, c10, 0\n" // clean dcache |
| 54 | "mcr p15, 0, r0, c7, c10, 4\n" // DSB |
| 55 | "mcr p15, 0, r0, c7, c5, 0\n" // invalidate icache+BTAC |
| 56 | "msr cpsr_cx, r1\n" // restore interrupts |
| 57 | ::: "r0", "r1"); |
| 58 | } |
| 59 | |
| 60 | void ctr_flush_invalidate_cache(void) |
| 61 | { |
| 62 | if (has_rosalina) { |
| 63 | ctr_clear_cache(); |
| 64 | } else { |
| 65 | // __asm__ volatile("svc 0x2E\n\t"); |
| 66 | // __asm__ volatile("svc 0x4B\n\t"); |
| 67 | svcBackdoor((ctr_callback_type)ctr_clean_invalidate_kernel); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | int ctr_svchack_init(void) |
| 72 | { |
| 73 | extern unsigned int __ctr_svchax; |
| 74 | extern unsigned int __service_ptr; |
| 75 | |
| 76 | if(__ctr_svchax) |
| 77 | return 1; /* All services have already been enabled */ |
| 78 | |
| 79 | if(__service_ptr) |
| 80 | return 0; |
| 81 | |
| 82 | /* CFW */ |
| 83 | ctr_enable_all_svc(); |
| 84 | return 1; |
| 85 | } |
| 86 | |