From 50190edb2a56bb9efa3e2f8ca32482dbd3e42412 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 18 Oct 2013 13:16:06 +0200 Subject: 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 --- arch/m68k/amiga/config.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/m68k/amiga') diff --git a/arch/m68k/amiga/config.c b/arch/m68k/amiga/config.c index 06920e85fac9..c425fa6c2795 100644 --- a/arch/m68k/amiga/config.c +++ b/arch/m68k/amiga/config.c @@ -360,6 +360,14 @@ static void __init amiga_identify(void) #undef AMIGAHW_ANNOUNCE } + +static unsigned long amiga_random_get_entropy(void) +{ + /* VPOSR/VHPOSR provide at least 17 bits of data changing at 1.79 MHz */ + return *(unsigned long *)&amiga_custom.vposr; +} + + /* * Setup the Amiga configuration info */ @@ -397,6 +405,8 @@ void __init config_amiga(void) mach_heartbeat = amiga_heartbeat; #endif + mach_random_get_entropy = amiga_random_get_entropy; + /* Fill in the clock value (based on the 700 kHz E-Clock) */ amiga_colorclock = 5*amiga_eclock; /* 3.5 MHz */ -- cgit v1.2.3