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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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edfaf05c2f
All OMAP IP blocks expect LE data, but CPU may operate in BE mode. Need to use endian neutral functions to read/write h/w registers. I.e instead of __raw_read[lw] and __raw_write[lw] functions code need to use read[lw]_relaxed and write[lw]_relaxed functions. If the first simply reads/writes register, the second will byteswap it if host operates in BE mode. Changes are trivial sed like replacement of __raw_xxx functions with xxx_relaxed variant. Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org> Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* OMAP4 PRCM_MPU module functions
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*
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* Copyright (C) 2009 Nokia Corporation
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* Paul Walmsley
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include "iomap.h"
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#include "common.h"
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#include "prcm_mpu44xx.h"
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#include "cm-regbits-44xx.h"
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/*
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* prcm_mpu_base: the virtual address of the start of the PRCM_MPU IP
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* block registers
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*/
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void __iomem *prcm_mpu_base;
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/* PRCM_MPU low-level functions */
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u32 omap4_prcm_mpu_read_inst_reg(s16 inst, u16 reg)
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{
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return readl_relaxed(OMAP44XX_PRCM_MPU_REGADDR(inst, reg));
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}
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void omap4_prcm_mpu_write_inst_reg(u32 val, s16 inst, u16 reg)
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{
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writel_relaxed(val, OMAP44XX_PRCM_MPU_REGADDR(inst, reg));
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}
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u32 omap4_prcm_mpu_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 reg)
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{
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u32 v;
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v = omap4_prcm_mpu_read_inst_reg(inst, reg);
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v &= ~mask;
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v |= bits;
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omap4_prcm_mpu_write_inst_reg(v, inst, reg);
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return v;
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}
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/**
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* omap2_set_globals_prcm_mpu - set the MPU PRCM base address (for early use)
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* @prcm_mpu: PRCM_MPU base virtual address
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*
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* XXX Will be replaced when the PRM/CM drivers are completed.
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*/
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void __init omap2_set_globals_prcm_mpu(void __iomem *prcm_mpu)
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{
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prcm_mpu_base = prcm_mpu;
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}
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