mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-04 23:07:46 -04:00
eac7a97e4f
Newer arm64 hw supports 64k pages, and recent Linux distros provide kernel packages like linux-image-generic-64k (can be used on r-pi4 with Ubuntu for example). It affects 32bit mode also, so assume that an arm32 binary compiled for vfp may be used on such kernel. Without this mprotect() fails to set exec permission because of bad alignment.
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
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* PicoDrive
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* Copyright (C) 2009,2010 notaz
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*
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* This work is licensed under the terms of MAME license.
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* See COPYING file in the top-level directory.
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*/
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#include <stdio.h>
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#include <pico/pico_int.h>
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#include "cmn.h"
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#if defined(__aarch64__) || defined(__VFP_FP__)
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// might be running on a 64k-page kernel
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#define PICO_PAGE_ALIGN 65536
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#else
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#define PICO_PAGE_ALIGN 4096
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#endif
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u8 ALIGNED(PICO_PAGE_ALIGN) tcache_default[DRC_TCACHE_SIZE];
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u8 *tcache;
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void drc_cmn_init(void)
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{
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int ret;
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tcache = plat_mem_get_for_drc(DRC_TCACHE_SIZE);
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if (tcache == NULL)
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tcache = tcache_default;
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ret = plat_mem_set_exec(tcache, DRC_TCACHE_SIZE);
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elprintf(EL_STATUS, "drc_cmn_init: %p, %zd bytes: %d",
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tcache, DRC_TCACHE_SIZE, ret);
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#ifdef __arm__
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if (PicoIn.opt & POPT_EN_DRC)
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{
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static int test_done;
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if (!test_done)
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{
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int *test_out = (void *)tcache;
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int (*testfunc)(void) = (void *)tcache;
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elprintf(EL_STATUS, "testing if we can run recompiled code..");
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*test_out++ = 0xe3a000dd; // mov r0, 0xdd
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*test_out++ = 0xe12fff1e; // bx lr
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cache_flush_d_inval_i(tcache, test_out);
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// we'll usually crash on broken platforms or bad ports,
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// but do a value check too just in case
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ret = testfunc();
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elprintf(EL_STATUS, "test %s.", ret == 0xdd ? "passed" : "failed");
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test_done = 1;
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}
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}
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#endif
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}
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void drc_cmn_cleanup(void)
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{
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}
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// vim:shiftwidth=2:expandtab
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