cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ocelot_io.c (3862B)

      1// SPDX-License-Identifier: (GPL-2.0 OR MIT)
      2/*
      3 * Microsemi Ocelot Switch driver
      4 *
      5 * Copyright (c) 2017 Microsemi Corporation
      6 */
      7#include <linux/io.h>
      8#include <linux/kernel.h>
      9#include <linux/platform_device.h>
     10
     11#include "ocelot.h"
     12
     13int __ocelot_bulk_read_ix(struct ocelot *ocelot, u32 reg, u32 offset, void *buf,
     14			  int count)
     15{
     16	u16 target = reg >> TARGET_OFFSET;
     17
     18	WARN_ON(!target);
     19
     20	return regmap_bulk_read(ocelot->targets[target],
     21				ocelot->map[target][reg & REG_MASK] + offset,
     22				buf, count);
     23}
     24EXPORT_SYMBOL_GPL(__ocelot_bulk_read_ix);
     25
     26u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset)
     27{
     28	u16 target = reg >> TARGET_OFFSET;
     29	u32 val;
     30
     31	WARN_ON(!target);
     32
     33	regmap_read(ocelot->targets[target],
     34		    ocelot->map[target][reg & REG_MASK] + offset, &val);
     35	return val;
     36}
     37EXPORT_SYMBOL_GPL(__ocelot_read_ix);
     38
     39void __ocelot_write_ix(struct ocelot *ocelot, u32 val, u32 reg, u32 offset)
     40{
     41	u16 target = reg >> TARGET_OFFSET;
     42
     43	WARN_ON(!target);
     44
     45	regmap_write(ocelot->targets[target],
     46		     ocelot->map[target][reg & REG_MASK] + offset, val);
     47}
     48EXPORT_SYMBOL_GPL(__ocelot_write_ix);
     49
     50void __ocelot_rmw_ix(struct ocelot *ocelot, u32 val, u32 mask, u32 reg,
     51		     u32 offset)
     52{
     53	u16 target = reg >> TARGET_OFFSET;
     54
     55	WARN_ON(!target);
     56
     57	regmap_update_bits(ocelot->targets[target],
     58			   ocelot->map[target][reg & REG_MASK] + offset,
     59			   mask, val);
     60}
     61EXPORT_SYMBOL_GPL(__ocelot_rmw_ix);
     62
     63u32 ocelot_port_readl(struct ocelot_port *port, u32 reg)
     64{
     65	struct ocelot *ocelot = port->ocelot;
     66	u16 target = reg >> TARGET_OFFSET;
     67	u32 val;
     68
     69	WARN_ON(!target);
     70
     71	regmap_read(port->target, ocelot->map[target][reg & REG_MASK], &val);
     72	return val;
     73}
     74EXPORT_SYMBOL_GPL(ocelot_port_readl);
     75
     76void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg)
     77{
     78	struct ocelot *ocelot = port->ocelot;
     79	u16 target = reg >> TARGET_OFFSET;
     80
     81	WARN_ON(!target);
     82
     83	regmap_write(port->target, ocelot->map[target][reg & REG_MASK], val);
     84}
     85EXPORT_SYMBOL_GPL(ocelot_port_writel);
     86
     87void ocelot_port_rmwl(struct ocelot_port *port, u32 val, u32 mask, u32 reg)
     88{
     89	u32 cur = ocelot_port_readl(port, reg);
     90
     91	ocelot_port_writel(port, (cur & (~mask)) | val, reg);
     92}
     93EXPORT_SYMBOL_GPL(ocelot_port_rmwl);
     94
     95u32 __ocelot_target_read_ix(struct ocelot *ocelot, enum ocelot_target target,
     96			    u32 reg, u32 offset)
     97{
     98	u32 val;
     99
    100	regmap_read(ocelot->targets[target],
    101		    ocelot->map[target][reg] + offset, &val);
    102	return val;
    103}
    104
    105void __ocelot_target_write_ix(struct ocelot *ocelot, enum ocelot_target target,
    106			      u32 val, u32 reg, u32 offset)
    107{
    108	regmap_write(ocelot->targets[target],
    109		     ocelot->map[target][reg] + offset, val);
    110}
    111
    112int ocelot_regfields_init(struct ocelot *ocelot,
    113			  const struct reg_field *const regfields)
    114{
    115	unsigned int i;
    116	u16 target;
    117
    118	for (i = 0; i < REGFIELD_MAX; i++) {
    119		struct reg_field regfield = {};
    120		u32 reg = regfields[i].reg;
    121
    122		if (!reg)
    123			continue;
    124
    125		target = regfields[i].reg >> TARGET_OFFSET;
    126
    127		regfield.reg = ocelot->map[target][reg & REG_MASK];
    128		regfield.lsb = regfields[i].lsb;
    129		regfield.msb = regfields[i].msb;
    130		regfield.id_size = regfields[i].id_size;
    131		regfield.id_offset = regfields[i].id_offset;
    132
    133		ocelot->regfields[i] =
    134		devm_regmap_field_alloc(ocelot->dev,
    135					ocelot->targets[target],
    136					regfield);
    137
    138		if (IS_ERR(ocelot->regfields[i]))
    139			return PTR_ERR(ocelot->regfields[i]);
    140	}
    141
    142	return 0;
    143}
    144EXPORT_SYMBOL_GPL(ocelot_regfields_init);
    145
    146static struct regmap_config ocelot_regmap_config = {
    147	.reg_bits	= 32,
    148	.val_bits	= 32,
    149	.reg_stride	= 4,
    150};
    151
    152struct regmap *ocelot_regmap_init(struct ocelot *ocelot, struct resource *res)
    153{
    154	void __iomem *regs;
    155
    156	regs = devm_ioremap_resource(ocelot->dev, res);
    157	if (IS_ERR(regs))
    158		return ERR_CAST(regs);
    159
    160	ocelot_regmap_config.name = res->name;
    161
    162	return devm_regmap_init_mmio(ocelot->dev, regs, &ocelot_regmap_config);
    163}
    164EXPORT_SYMBOL_GPL(ocelot_regmap_init);