mirror of
https://github.com/RaySollium99/picodrive.git
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7612bf90be
Verbatim copy from https://github.com/libretro/picodrive/ commit 9ae88ef15ff00cacc3877c7ecc13b0092bab50b8 , so look there for the history of libretro specific changes. Unfortunately there is too much noise and divergence to merge this in a proper way.
78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
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#include "3ds_utils.h"
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typedef int (*ctr_callback_type)(void);
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int srvGetServiceHandle(unsigned int* out, const char* name);
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int svcCloseHandle(unsigned int handle);
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int svcBackdoor(ctr_callback_type);
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static void ctr_enable_all_svc_kernel(void)
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{
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__asm__ volatile("cpsid aif");
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unsigned int* svc_access_control = *(*(unsigned int***)0xFFFF9000 + 0x22) - 0x6;
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svc_access_control[0]=0xFFFFFFFE;
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svc_access_control[1]=0xFFFFFFFF;
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svc_access_control[2]=0xFFFFFFFF;
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svc_access_control[3]=0x3FFFFFFF;
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}
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static void ctr_invalidate_ICache_kernel(void)
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{
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__asm__ volatile(
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"cpsid aif\n\t"
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"mov r0, #0\n\t"
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"mcr p15, 0, r0, c7, c5, 0\n\t");
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}
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static void ctr_flush_DCache_kernel(void)
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{
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__asm__ volatile(
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"cpsid aif\n\t"
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"mov r0, #0\n\t"
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"mcr p15, 0, r0, c7, c10, 0\n\t");
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}
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static void ctr_enable_all_svc(void)
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{
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svcBackdoor((ctr_callback_type)ctr_enable_all_svc_kernel);
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}
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void ctr_invalidate_ICache(void)
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{
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// __asm__ volatile("svc 0x2E\n\t");
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svcBackdoor((ctr_callback_type)ctr_invalidate_ICache_kernel);
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}
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void ctr_flush_DCache(void)
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{
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// __asm__ volatile("svc 0x4B\n\t");
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svcBackdoor((ctr_callback_type)ctr_flush_DCache_kernel);
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}
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void ctr_flush_invalidate_cache(void)
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{
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ctr_flush_DCache();
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ctr_invalidate_ICache();
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}
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int ctr_svchack_init(void)
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{
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extern unsigned int __service_ptr;
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if(__service_ptr)
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return 0;
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/* CFW */
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ctr_enable_all_svc();
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return 1;
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}
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