mirror of
https://github.com/Fishwaldo/Star64_linux.git
synced 2025-03-16 04:04:06 +00:00
drivers/hw_random: Add Starfive VIC Random Number Generator driver
This commit is contained in:
parent
26d688fb4f
commit
4f7f24361c
4 changed files with 437 additions and 0 deletions
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@ -335,6 +335,19 @@ config HW_RANDOM_POWERNV
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If unsure, say Y.
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config HW_RANDOM_STARFIVE_VIC
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tristate "Starfive VIC Random Number Generator support"
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depends on HW_RANDOM
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default y if SOC_STARFIVE_VIC7100
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help
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This driver provides kernel-side support for the Random Number
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Generator hardware found on Starfive VIC SoC.
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To compile this driver as a module, choose M here: the
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module will be called starfive-vic-rng.
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If unsure, say Y.
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config HW_RANDOM_HISI
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tristate "Hisilicon Random Number Generator support"
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depends on HW_RANDOM && ARCH_HISI
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@ -29,6 +29,7 @@ obj-$(CONFIG_HW_RANDOM_OCTEON) += octeon-rng.o
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obj-$(CONFIG_HW_RANDOM_NOMADIK) += nomadik-rng.o
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obj-$(CONFIG_HW_RANDOM_PSERIES) += pseries-rng.o
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obj-$(CONFIG_HW_RANDOM_POWERNV) += powernv-rng.o
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obj-$(CONFIG_HW_RANDOM_STARFIVE_VIC) += starfive-vic-rng.o
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obj-$(CONFIG_HW_RANDOM_HISI) += hisi-rng.o
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obj-$(CONFIG_HW_RANDOM_HISI_V2) += hisi-trng-v2.o
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obj-$(CONFIG_HW_RANDOM_BCM2835) += bcm2835-rng.o
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256
drivers/char/hw_random/starfive-vic-rng.c
Normal file
256
drivers/char/hw_random/starfive-vic-rng.c
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@ -0,0 +1,256 @@
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/*
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******************************************************************************
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* @file starfive-vic-rng.c
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* @author StarFive Technology
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* @version V1.0
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* @date 08/13/2020
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* @brief
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******************************************************************************
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* @copy
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*
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* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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* TIME. AS A RESULT, STARFIVE SHALL NOT BE HELD LIABLE FOR ANY
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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* FROM THE CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* COPYRIGHT 2020 Shanghai StarFive Technology Co., Ltd.
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*/
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/hw_random.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/random.h>
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#include "starfive-vic-rng.h"
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#define to_vic_rng(p) container_of(p, struct vic_rng, rng)
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struct vic_rng {
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struct device *dev;
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void __iomem *base;
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struct hwrng rng;
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};
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static inline void vic_wait_till_idle(struct vic_rng *hrng)
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{
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while(readl(hrng->base + VIC_STAT) & VIC_STAT_BUSY)
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;
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}
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static inline void vic_rng_irq_mask_clear(struct vic_rng *hrng)
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{
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// clear register: ISTAT
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u32 data = readl(hrng->base + VIC_ISTAT);
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writel(data, hrng->base + VIC_ISTAT);
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writel(0, hrng->base + VIC_ALARM);
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}
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static int vic_trng_cmd(struct vic_rng *hrng, u32 cmd) {
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int res = 0;
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// wait till idle
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vic_wait_till_idle(hrng);
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switch (cmd) {
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case VIC_CTRL_CMD_NOP:
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case VIC_CTRL_CMD_GEN_NOISE:
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case VIC_CTRL_CMD_GEN_NONCE:
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case VIC_CTRL_CMD_CREATE_STATE:
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case VIC_CTRL_CMD_RENEW_STATE:
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case VIC_CTRL_CMD_REFRESH_ADDIN:
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case VIC_CTRL_CMD_GEN_RANDOM:
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case VIC_CTRL_CMD_ADVANCE_STATE:
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case VIC_CTRL_CMD_KAT:
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case VIC_CTRL_CMD_ZEROIZE:
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writel(cmd, hrng->base + VIC_CTRL);
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break;
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default:
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res = -1;
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break;
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}
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return res;
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}
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static int vic_rng_init(struct hwrng *rng)
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{
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struct vic_rng *hrng = to_vic_rng(rng);
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// wait till idle
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// clear register: ISTAT
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vic_rng_irq_mask_clear(hrng);
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// set mission mode
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writel(VIC_SMODE_SECURE_EN(1), hrng->base + VIC_SMODE);
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vic_trng_cmd(hrng, VIC_CTRL_CMD_GEN_NOISE);
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vic_wait_till_idle(hrng);
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// set interrupt
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writel(VIC_IE_ALL, hrng->base + VIC_IE);
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// zeroize
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vic_trng_cmd(hrng, VIC_CTRL_CMD_ZEROIZE);
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vic_wait_till_idle(hrng);
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return 0;
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}
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static irqreturn_t vic_rng_irq(int irq, void *priv)
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{
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u32 status, val;
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struct vic_rng *hrng = (struct vic_rng *)priv;
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/*
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* clearing the interrupt will also clear the error register
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* read error and status before clearing
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*/
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status = readl(hrng->base + VIC_ISTAT);
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if (status & VIC_ISTAT_ALARMS) {
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writel(VIC_ISTAT_ALARMS, hrng->base + VIC_ISTAT);
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val = readl(hrng->base + VIC_ALARM);
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if (val & VIC_ALARM_ILLEGAL_CMD_SEQ) {
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writel(VIC_ALARM_ILLEGAL_CMD_SEQ, hrng->base + VIC_ALARM);
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//dev_info(hrng->dev, "ILLEGAL CMD SEQ: LAST_CMD=0x%x\r\n",
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//VIC_STAT_LAST_CMD(readl(hrng->base + VIC_STAT)));
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} else {
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dev_info(hrng->dev, "Failed test: %x\r\n", val);
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}
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}
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if (status & VIC_ISTAT_ZEROIZE) {
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writel(VIC_ISTAT_ZEROIZE, hrng->base + VIC_ISTAT);
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//dev_info(hrng->dev, "zeroized\r\n");
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}
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if (status & VIC_ISTAT_KAT_COMPLETE) {
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writel(VIC_ISTAT_KAT_COMPLETE, hrng->base + VIC_ISTAT);
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//dev_info(hrng->dev, "kat_completed\r\n");
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}
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if (status & VIC_ISTAT_NOISE_RDY) {
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writel(VIC_ISTAT_NOISE_RDY, hrng->base + VIC_ISTAT);
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//dev_info(hrng->dev, "noise_rdy\r\n");
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}
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if (status & VIC_ISTAT_DONE) {
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writel(VIC_ISTAT_DONE, hrng->base + VIC_ISTAT);
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//dev_info(hrng->dev, "done\r\n");
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/*
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if (VIC_STAT_LAST_CMD(readl(hrng->base + VIC_STAT)) ==
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VIC_CTRL_CMD_GEN_RANDOM) {
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dev_info(hrng->dev, "Need Update Buffer\r\n");
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}
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*/
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}
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vic_rng_irq_mask_clear(hrng);
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return IRQ_HANDLED;
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}
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static void vic_rng_cleanup(struct hwrng *rng)
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{
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struct vic_rng *hrng = to_vic_rng(rng);
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writel(0, hrng->base + VIC_CTRL);
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}
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static int vic_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
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{
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struct vic_rng *hrng = to_vic_rng(rng);
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vic_trng_cmd(hrng, VIC_CTRL_CMD_ZEROIZE);
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vic_trng_cmd(hrng, VIC_CTRL_CMD_GEN_NOISE);
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vic_trng_cmd(hrng, VIC_CTRL_CMD_CREATE_STATE);
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vic_wait_till_idle(hrng);
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max = min_t(size_t, max, (VIC_RAND_LEN * 4));
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writel(0x0, hrng->base + VIC_MODE);
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vic_trng_cmd(hrng, VIC_CTRL_CMD_GEN_RANDOM);
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vic_wait_till_idle(hrng);
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memcpy_fromio(buf, hrng->base + VIC_RAND0, max);
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vic_trng_cmd(hrng, VIC_CTRL_CMD_ZEROIZE);
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vic_wait_till_idle(hrng);
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return max;
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}
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static int vic_rng_probe(struct platform_device *pdev)
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{
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int ret;
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int irq;
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struct vic_rng *rng;
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struct resource *res;
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rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);
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if (!rng){
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return -ENOMEM;
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}
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platform_set_drvdata(pdev, rng);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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rng->base = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(rng->base)){
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return PTR_ERR(rng->base);
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}
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irq = platform_get_irq(pdev, 0);
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if (irq <= 0) {
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dev_err(&pdev->dev, "Couldn't get irq %d\n", irq);
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return irq;
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}
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ret = devm_request_irq(&pdev->dev, irq, vic_rng_irq, 0, pdev->name,
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(void *)rng);
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if (ret) {
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dev_err(&pdev->dev, "Can't get interrupt working.\n");
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return ret;
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}
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rng->rng.name = pdev->name;
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rng->rng.init = vic_rng_init;
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rng->rng.cleanup = vic_rng_cleanup;
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rng->rng.read = vic_rng_read;
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rng->dev = &pdev->dev;
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ret = devm_hwrng_register(&pdev->dev, &rng->rng);
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if (ret) {
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dev_err(&pdev->dev, "failed to register hwrng\n");
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return ret;
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}
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dev_info(&pdev->dev, "Initialized\n");
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return 0;
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}
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static const struct of_device_id vic_rng_dt_ids[] = {
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{ .compatible = "starfive,vic-rng" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, vic_rng_dt_ids);
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static struct platform_driver vic_rng_driver = {
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.probe = vic_rng_probe,
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.driver = {
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.name = "vic-rng",
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.of_match_table = of_match_ptr(vic_rng_dt_ids),
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},
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};
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module_platform_driver(vic_rng_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Huan Feng <huan.feng@starfivetech.com>");
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MODULE_DESCRIPTION("Starfive VIC random number generator driver");
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drivers/char/hw_random/starfive-vic-rng.h
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167
drivers/char/hw_random/starfive-vic-rng.h
Normal file
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/*
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******************************************************************************
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* @file starfive-vic-rng.h
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* @author StarFive Technology
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* @version V1.0
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* @date 08/13/2020
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* @brief
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******************************************************************************
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* @copy
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*
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* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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* TIME. AS A RESULT, STARFIVE SHALL NOT BE HELD LIABLE FOR ANY
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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* FROM THE CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* COPYRIGHT 2020 Shanghai StarFive Technology Co., Ltd.
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*/
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#define VIC_CTRL 0x00
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#define VIC_MODE 0x04
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#define VIC_SMODE 0x08
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#define VIC_STAT 0x0C
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#define VIC_IE 0x10
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#define VIC_ISTAT 0x14
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#define VIC_ALARM 0x18
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#define VIC_BUILD_ID 0x1C
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#define VIC_FEATURES 0x20
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#define VIC_RAND0 0x24
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#define VIC_NPA_DATA0 0x34
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#define VIC_SEED0 0x74
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#define VIC_IA_RDATA 0xA4
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#define VIC_IA_WDATA 0xA8
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#define VIC_IA_ADDR 0xAC
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#define VIC_IA_CMD 0xB0
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/* CTRL */
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#define VIC_CTRL_CMD_NOP 0
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#define VIC_CTRL_CMD_GEN_NOISE 1
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#define VIC_CTRL_CMD_GEN_NONCE 2
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#define VIC_CTRL_CMD_CREATE_STATE 3
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#define VIC_CTRL_CMD_RENEW_STATE 4
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#define VIC_CTRL_CMD_REFRESH_ADDIN 5
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#define VIC_CTRL_CMD_GEN_RANDOM 6
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#define VIC_CTRL_CMD_ADVANCE_STATE 7
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#define VIC_CTRL_CMD_KAT 8
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#define VIC_CTRL_CMD_ZEROIZE 15
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/* MODE */
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#define _VIC_MODE_ADDIN_PRESENT 4
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#define _VIC_MODE_PRED_RESIST 3
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#define _VIC_MODE_KAT_SEL 2
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#define _VIC_MODE_KAT_VEC 1
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#define _VIC_MODE_SEC_ALG 0
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#define VIC_MODE_ADDIN_PRESENT (1UL << _VIC_MODE_ADDIN_PRESENT)
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#define VIC_MODE_PRED_RESIST (1UL << _VIC_MODE_PRED_RESIST)
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#define VIC_MODE_KAT_SEL (1UL << _VIC_MODE_KAT_SEL)
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#define VIC_MODE_KAT_VEC (1UL << _VIC_MODE_KAT_VEC)
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#define VIC_MODE_SEC_ALG (1UL << _VIC_MODE_SEC_ALG)
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/* SMODE */
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#define _VIC_SMODE_MAX_REJECTS 2
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#define _VIC_SMODE_SECURE_EN 1
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#define _VIC_SMODE_NONCE 0
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#define VIC_SMODE_MAX_REJECTS(x) ((x) << _VIC_SMODE_MAX_REJECTS)
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#define VIC_SMODE_SECURE_EN(x) ((x) << _VIC_SMODE_SECURE_EN)
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#define VIC_SMODE_NONCE (1UL << _VIC_SMODE_NONCE)
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/* STAT */
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#define _VIC_STAT_BUSY 31
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#define _VIC_STAT_DRBG_STATE 7
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#define _VIC_STAT_SECURE 6
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#define _VIC_STAT_NONCE_MODE 5
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#define _VIC_STAT_SEC_ALG 4
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#define _VIC_STAT_LAST_CMD 0
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#define VIC_STAT_BUSY (1UL << _VIC_STAT_BUSY)
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#define VIC_STAT_DRBG_STATE (1UL << _VIC_STAT_DRBG_STATE)
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#define VIC_STAT_SECURE (1UL << _VIC_STAT_SECURE)
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#define VIC_STAT_NONCE_MODE (1UL << _VIC_STAT_NONCE_MODE)
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#define VIC_STAT_SEC_ALG (1UL << _VIC_STAT_SEC_ALG)
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#define VIC_STAT_LAST_CMD(x) (((x) >> _VIC_STAT_LAST_CMD) & 0xF)
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/* IE */
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#define _VIC_IE_GLBL 31
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#define _VIC_IE_DONE 4
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#define _VIC_IE_ALARMS 3
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#define _VIC_IE_NOISE_RDY 2
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#define _VIC_IE_KAT_COMPLETE 1
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#define _VIC_IE_ZEROIZE 0
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#define VIC_IE_GLBL (1UL << _VIC_IE_GLBL)
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#define VIC_IE_DONE (1UL << _VIC_IE_DONE)
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#define VIC_IE_ALARMS (1UL << _VIC_IE_ALARMS)
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#define VIC_IE_NOISE_RDY (1UL << _VIC_IE_NOISE_RDY)
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#define VIC_IE_KAT_COMPLETE (1UL << _VIC_IE_KAT_COMPLETE)
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#define VIC_IE_ZEROIZE (1UL << _VIC_IE_ZEROIZE)
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#define VIC_IE_ALL (VIC_IE_GLBL | VIC_IE_DONE | VIC_IE_ALARMS | \
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VIC_IE_NOISE_RDY | VIC_IE_KAT_COMPLETE | VIC_IE_ZEROIZE)
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/* ISTAT */
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#define _VIC_ISTAT_DONE 4
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#define _VIC_ISTAT_ALARMS 3
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#define _VIC_ISTAT_NOISE_RDY 2
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#define _VIC_ISTAT_KAT_COMPLETE 1
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#define _VIC_ISTAT_ZEROIZE 0
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#define VIC_ISTAT_DONE (1UL << _VIC_ISTAT_DONE)
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#define VIC_ISTAT_ALARMS (1UL << _VIC_ISTAT_ALARMS)
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#define VIC_ISTAT_NOISE_RDY (1UL << _VIC_ISTAT_NOISE_RDY)
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#define VIC_ISTAT_KAT_COMPLETE (1UL << _VIC_ISTAT_KAT_COMPLETE)
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#define VIC_ISTAT_ZEROIZE (1UL << _VIC_ISTAT_ZEROIZE)
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/* ALARMS */
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#define VIC_ALARM_ILLEGAL_CMD_SEQ (1UL << 4)
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#define VIC_ALARM_FAILED_TEST_ID_OK 0
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#define VIC_ALARM_FAILED_TEST_ID_KAT_STAT 1
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#define VIC_ALARM_FAILED_TEST_ID_KAT 2
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#define VIC_ALARM_FAILED_TEST_ID_MONOBIT 3
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#define VIC_ALARM_FAILED_TEST_ID_RUN 4
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#define VIC_ALARM_FAILED_TEST_ID_LONGRUN 5
|
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#define VIC_ALARM_FAILED_TEST_ID_AUTOCORRELATION 6
|
||||
#define VIC_ALARM_FAILED_TEST_ID_POKER 7
|
||||
#define VIC_ALARM_FAILED_TEST_ID_REPETITION_COUNT 8
|
||||
#define VIC_ALARM_FAILED_TEST_ID_ADAPATIVE_PROPORTION 9
|
||||
|
||||
/* BUILD_ID */
|
||||
#define VIC_BUILD_ID_STEPPING(x) (((x) >> 28) & 0xF)
|
||||
#define VIC_BUILD_ID_EPN(x) ((x) & 0xFFFF)
|
||||
|
||||
/* FEATURES */
|
||||
#define VIC_FEATURES_AES_256(x) (((x) >> 9) & 1)
|
||||
#define VIC_FEATURES_EXTRA_PS_PRESENT(x) (((x) >> 8) & 1)
|
||||
#define VIC_FEATURES_DIAG_LEVEL_NS(x) (((x) >> 7) & 1)
|
||||
#define VIC_FEATURES_DIAG_LEVEL_CLP800(x) (((x) >> 4) & 7)
|
||||
#define VIC_FEATURES_DIAG_LEVEL_ST_HLT(x) (((x) >> 1) & 7)
|
||||
#define VIC_FEATURES_SECURE_RST_STATE(x) ((x) & 1)
|
||||
|
||||
/* IA_CMD */
|
||||
#define VIC_IA_CMD_GO (1UL << 31)
|
||||
#define VIC_IA_CMD_WR (1)
|
||||
|
||||
#define _VIC_SMODE_MAX_REJECTS_MASK 255UL
|
||||
#define _VIC_SMODE_SECURE_EN_MASK 1UL
|
||||
#define _VIC_SMODE_NONCE_MASK 1UL
|
||||
#define _VIC_MODE_SEC_ALG_MASK 1UL
|
||||
#define _VIC_MODE_ADDIN_PRESENT_MASK 1UL
|
||||
#define _VIC_MODE_PRED_RESIST_MASK 1UL
|
||||
|
||||
#define VIC_SMODE_SET_MAX_REJECTS(y, x) (((y) & ~(_VIC_SMODE_MAX_REJECTS_MASK << _VIC_SMODE_MAX_REJECTS)) | ((x) << _VIC_SMODE_MAX_REJECTS))
|
||||
#define VIC_SMODE_SET_SECURE_EN(y, x) (((y) & ~(_VIC_SMODE_SECURE_EN_MASK << _VIC_SMODE_SECURE_EN)) | ((x) << _VIC_SMODE_SECURE_EN))
|
||||
#define VIC_SMODE_SET_NONCE(y, x) (((y) & ~(_VIC_SMODE_NONCE_MASK << _VIC_SMODE_NONCE)) | ((x) << _VIC_SMODE_NONCE))
|
||||
#define VIC_SMODE_GET_MAX_REJECTS(x) (((x) >> _VIC_SMODE_MAX_REJECTS) & _VIC_SMODE_MAX_REJECTS_MASK)
|
||||
#define VIC_SMODE_GET_SECURE_EN(x) (((x) >> _VIC_SMODE_SECURE_EN) & _VIC_SMODE_SECURE_EN_MASK)
|
||||
#define VIC_SMODE_GET_NONCE(x) (((x) >> _VIC_SMODE_NONCE) & _VIC_SMODE_NONCE_MASK)
|
||||
|
||||
#define VIC_MODE_SET_SEC_ALG(y, x) (((y) & ~(_VIC_MODE_SEC_ALG_MASK << _VIC_MODE_SEC_ALG)) | ((x) << _VIC_MODE_SEC_ALG))
|
||||
#define VIC_MODE_SET_PRED_RESIST(y, x) (((y) & ~(_VIC_MODE_PRED_RESIST_MASK << _VIC_MODE_PRED_RESIST)) | ((x) << _VIC_MODE_PRED_RESIST))
|
||||
#define VIC_MODE_SET_ADDIN_PRESENT(y, x) (((y) & ~(_VIC_MODE_ADDIN_PRESENT_MASK << _VIC_MODE_ADDIN_PRESENT)) | ((x) << _VIC_MODE_ADDIN_PRESENT))
|
||||
#define VIC_MODE_GET_SEC_ALG(x) (((x) >> _VIC_MODE_SEC_ALG) & _VIC_MODE_SEC_ALG_MASK)
|
||||
#define VIC_MODE_GET_PRED_RESIST(x) (((x) >> _VIC_MODE_PRED_RESIST) & _VIC_MODE_PRED_RESIST_MASK)
|
||||
#define VIC_MODE_GET_ADDIN_PRESENT(x) (((x) >> _VIC_MODE_ADDIN_PRESENT) & _VIC_MODE_ADDIN_PRESENT_MASK)
|
||||
|
||||
#define VIC_RAND_LEN 4
|
Loading…
Add table
Reference in a new issue