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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pxa2xx.c (1765B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * linux/arch/arm/mach-pxa/pxa2xx.c
      4 *
      5 * code specific to pxa2xx
      6 *
      7 * Copyright (C) 2008 Dmitry Baryshkov
      8 */
      9
     10#include <linux/module.h>
     11#include <linux/kernel.h>
     12#include <linux/device.h>
     13#include <linux/io.h>
     14
     15#include "pxa2xx-regs.h"
     16#include "mfp-pxa25x.h"
     17#include "generic.h"
     18#include "reset.h"
     19#include "smemc.h"
     20#include <linux/soc/pxa/smemc.h>
     21#include <linux/platform_data/irda-pxaficp.h>
     22
     23void pxa2xx_clear_reset_status(unsigned int mask)
     24{
     25	/* RESET_STATUS_* has a 1:1 mapping with RCSR */
     26	RCSR = mask;
     27}
     28
     29static unsigned long pxa2xx_mfp_fir[] = {
     30	GPIO46_FICP_RXD,
     31	GPIO47_FICP_TXD,
     32};
     33
     34static unsigned long pxa2xx_mfp_sir[] = {
     35	GPIO46_STUART_RXD,
     36	GPIO47_STUART_TXD,
     37};
     38
     39static unsigned long pxa2xx_mfp_off[] = {
     40	GPIO46_GPIO | MFP_LPM_DRIVE_LOW,
     41	GPIO47_GPIO | MFP_LPM_DRIVE_LOW,
     42};
     43
     44void pxa2xx_transceiver_mode(struct device *dev, int mode)
     45{
     46	if (mode & IR_OFF) {
     47		pxa2xx_mfp_config(pxa2xx_mfp_off, ARRAY_SIZE(pxa2xx_mfp_off));
     48	} else if (mode & IR_SIRMODE) {
     49		pxa2xx_mfp_config(pxa2xx_mfp_sir, ARRAY_SIZE(pxa2xx_mfp_sir));
     50	} else if (mode & IR_FIRMODE) {
     51		pxa2xx_mfp_config(pxa2xx_mfp_fir, ARRAY_SIZE(pxa2xx_mfp_fir));
     52	} else
     53		BUG();
     54}
     55EXPORT_SYMBOL_GPL(pxa2xx_transceiver_mode);
     56
     57#define MDCNFG_DRAC2(mdcnfg)	(((mdcnfg) >> 21) & 0x3)
     58#define MDCNFG_DRAC0(mdcnfg)	(((mdcnfg) >> 5) & 0x3)
     59
     60int pxa2xx_smemc_get_sdram_rows(void)
     61{
     62	static int sdram_rows;
     63	unsigned int drac2 = 0, drac0 = 0;
     64	u32 mdcnfg;
     65
     66	if (sdram_rows)
     67		return sdram_rows;
     68
     69	mdcnfg = readl_relaxed(MDCNFG);
     70
     71	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
     72		drac2 = MDCNFG_DRAC2(mdcnfg);
     73
     74	if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
     75		drac0 = MDCNFG_DRAC0(mdcnfg);
     76
     77	sdram_rows = 1 << (11 + max(drac0, drac2));
     78	return sdram_rows;
     79}