m68k/amiga: Provide mach_random_get_entropy()
Use the beam position registers, which provide at least 17 bits of data changing at 1.79 MHz. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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@ -360,6 +360,14 @@ static void __init amiga_identify(void)
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#undef AMIGAHW_ANNOUNCE
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}
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static unsigned long amiga_random_get_entropy(void)
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{
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/* VPOSR/VHPOSR provide at least 17 bits of data changing at 1.79 MHz */
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return *(unsigned long *)&amiga_custom.vposr;
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}
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/*
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* Setup the Amiga configuration info
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*/
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@ -397,6 +405,8 @@ void __init config_amiga(void)
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mach_heartbeat = amiga_heartbeat;
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#endif
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mach_random_get_entropy = amiga_random_get_entropy;
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/* Fill in the clock value (based on the 700 kHz E-Clock) */
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amiga_colorclock = 5*amiga_eclock; /* 3.5 MHz */
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