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| author | Justin Weiss | 2020-02-29 10:50:30 -0800 |
|---|---|---|
| committer | Justin Weiss | 2020-02-29 10:55:58 -0800 |
| commit | 6a50b8a68d5a0595dc78c90f5d0969021beb7ea1 (patch) | |
| tree | 79becdf758bdca2d5f34cc4b6de3f33400bf66c9 /3ds/3ds_cache_utils.S | |
| parent | 4d6846b4b72f0f5bbfeb684106cbf5fca8d4743a (diff) | |
| download | picogpsp-6a50b8a68d5a0595dc78c90f5d0969021beb7ea1.tar.gz picogpsp-6a50b8a68d5a0595dc78c90f5d0969021beb7ea1.tar.bz2 picogpsp-6a50b8a68d5a0595dc78c90f5d0969021beb7ea1.zip | |
[3DS] Fix dynarec prefetch aborts
Similar fix to https://github.com/libretro/pcsx_rearmed/pull/390. The
Nintendo svcBackdoor can cause stack corruption if an interrupt
happens during it, this uses Luma3DS/Rosalina's svcCustomBackdoor instead.
Diffstat (limited to '3ds/3ds_cache_utils.S')
| -rw-r--r-- | 3ds/3ds_cache_utils.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/3ds/3ds_cache_utils.S b/3ds/3ds_cache_utils.S new file mode 100644 index 0000000..c8df651 --- /dev/null +++ b/3ds/3ds_cache_utils.S @@ -0,0 +1,25 @@ + .text + .arm + .balign 4 + + .func ctr_clear_cache_kernel +ctr_clear_cache_kernel: + cpsid aif + mov r0, #0 + mcr p15, 0, r0, c7, c10, 0 @ Clean entire data cache + mcr p15, 0, r0, c7, c10, 5 @ Data Memory Barrier + mcr p15, 0, r0, c7, c5, 0 @ Invalidate entire instruction cache / Flush BTB + mcr p15, 0, r0, c7, c10, 4 @ Data Sync Barrier + bx lr + .endfunc + + @@ Clear the entire data cache / invalidate the instruction cache. Uses + @@ Rosalina svcCustomBackdoor to avoid svcBackdoor stack corruption + @@ during interrupts. + .global ctr_clear_cache + .func ctr_clear_cache +ctr_clear_cache: + ldr r0, =ctr_clear_cache_kernel + svc 0x80 @ svcCustomBackdoor + bx lr + .endfunc |