46 lines
809 B
C
46 lines
809 B
C
#include "libsys.h"
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#include "gpio.h"
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int uncached_cachemiss_bug(uint32_t* pMem)
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{
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uint32_t result;
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pMem[0] = 0x12345678;
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pMem[1] = 0xFFFFFFFF;
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DCACHE_invalidate_all();
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__asm__
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(
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"lui $s0, 0xA000\n"
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"lw $a0, 32($s0)\n"
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"or $s1, $a0, $0\n"
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"or $a2, $0, $0\n"
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"addiu $a2, 1\n"
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"sw $a2, 32($s0)\n"
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// "lw $a1, 0(%[pMem])\n"
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"lw $a0, 32($s0)\n"
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"lw $a2, 4(%[pMem])\n"
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"lw $a1, 0(%[pMem])\n"
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"nop\n"
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"sw $s1, 8($s0)\n"
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"or %[val], $a0, $0\n"
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: [val] "=r" (result)
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: [pMem] "r" (pMem)
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: "a0", "a1", "a2", "s0", "s1"
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);
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return result;
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}
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int main()
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{
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uint32_t volatile *pLed = (uint32_t*)SYS_GPIO_0_BASE;
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int buf[256], res;
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res = uncached_cachemiss_bug(buf);
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*pLed = res;
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return res;
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}
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