motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-06 01:03:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

hw/misc: Add Exynos4210 Pseudo Random Number Generator

Browse source 
Add emulation for Exynos4210 Pseudo Random Number Generator which could
work on fixed seeds or with seeds provided by True Random Number
Generator block inside the SoC.

Implement only the fixed seeds part of it in polling mode (no
interrupts).

Emulation tested with two independent Linux kernel exynos-rng drivers:
1. New kcapi-rng interface (targeting Linux v4.12),
2. Old hwrng inteface
   # echo "exynos" > /sys/class/misc/hw_random/rng_current
   # dd if=/dev/hwrng of=/dev/null bs=1 count=16

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Message-id: 20170425180609.11004-1-krzk@kernel.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: wrapped a few overlong lines; more efficient implementation
 of exynos4210_rng_seed_ready()]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Krzysztof Kozlowski 2017-07-11 11:21:26 +01:00 • committed by Peter Maydell
parent 3d0bf8dfdf
commit 499ca13792
3 changed files with 282 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
hw/arm/exynos4210.c
View file

@ -87,6 +87,9 @@
/* Clock controller SFR base address */
#define EXYNOS4210_CLK_BASE_ADDR 0x10030000
/* PRNG/HASH SFR base address */
#define EXYNOS4210_RNG_BASE_ADDR 0x10830400
/* Display controllers (FIMD) */
#define EXYNOS4210_FIMD0_BASE_ADDR 0x11C00000
@ -305,6 +308,7 @@ Exynos4210State *exynos4210_init(MemoryRegion *system_mem)
sysbus_create_simple("exynos4210.pmu", EXYNOS4210_PMU_BASE_ADDR, NULL);
sysbus_create_simple("exynos4210.clk", EXYNOS4210_CLK_BASE_ADDR, NULL);
sysbus_create_simple("exynos4210.rng", EXYNOS4210_RNG_BASE_ADDR, NULL);
/* PWM */
sysbus_create_varargs("exynos4210.pwm", EXYNOS4210_PWM_BASE_ADDR,