cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

board-artpec6.c (1517B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * ARTPEC-6 device support.
      4 */
      5
      6#include <linux/amba/bus.h>
      7#include <linux/clocksource.h>
      8#include <linux/dma-mapping.h>
      9#include <linux/io.h>
     10#include <linux/irqchip.h>
     11#include <linux/irqchip/arm-gic.h>
     12#include <linux/mfd/syscon.h>
     13#include <linux/of.h>
     14#include <linux/of_address.h>
     15#include <linux/clk-provider.h>
     16#include <linux/regmap.h>
     17#include <linux/smp.h>
     18#include <asm/smp_scu.h>
     19#include <asm/mach/arch.h>
     20#include <asm/mach/map.h>
     21#include <asm/psci.h>
     22#include <linux/arm-smccc.h>
     23
     24
     25#define ARTPEC6_DMACFG_REGNUM 0x10
     26#define ARTPEC6_DMACFG_UARTS_BURST 0xff
     27
     28#define SECURE_OP_L2C_WRITEREG 0xb4000001
     29
     30static void __init artpec6_init_machine(void)
     31{
     32	struct regmap *regmap;
     33
     34	regmap = syscon_regmap_lookup_by_compatible("axis,artpec6-syscon");
     35
     36	if (!IS_ERR(regmap)) {
     37		/* Use PL011 DMA Burst Request signal instead of DMA
     38		 *  Single Request
     39		 */
     40		regmap_write(regmap, ARTPEC6_DMACFG_REGNUM,
     41			     ARTPEC6_DMACFG_UARTS_BURST);
     42	};
     43}
     44
     45static void artpec6_l2c310_write_sec(unsigned long val, unsigned reg)
     46{
     47	struct arm_smccc_res res;
     48
     49	arm_smccc_smc(SECURE_OP_L2C_WRITEREG, reg, val, 0,
     50		      0, 0, 0, 0, &res);
     51
     52	WARN_ON(res.a0);
     53}
     54
     55static const char * const artpec6_dt_match[] = {
     56	"axis,artpec6",
     57	NULL
     58};
     59
     60DT_MACHINE_START(ARTPEC6, "Axis ARTPEC-6 Platform")
     61	.l2c_aux_val	= 0x0C000000,
     62	.l2c_aux_mask	= 0xF3FFFFFF,
     63	.l2c_write_sec  = artpec6_l2c310_write_sec,
     64	.init_machine	= artpec6_init_machine,
     65	.dt_compat	= artpec6_dt_match,
     66MACHINE_END