39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
#ifndef _REG_H_
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#define _REG_H_
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#include "types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* low level macros for accessing memory mapped hardware registers */
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#define REG64(addr) ((volatile uint64_t *)(addr))
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#define REG32(addr) ((volatile uint32_t *)(addr))
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#define REG16(addr) ((volatile uint16_t *)(addr))
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#define REG8(addr) ((volatile uint8_t *)(addr))
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#define RMWREG64(addr, startbit, width, val) *REG64(addr) = (*REG64(addr) & ~(((1 << (width)) - 1) << (startbit))) | ((val) << (startbit))
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#define RMWREG32(addr, startbit, width, val) *REG32(addr) = (*REG32(addr) & ~(((1 << (width)) - 1) << (startbit))) | ((val) << (startbit))
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#define RMWREG16(addr, startbit, width, val) *REG16(addr) = (*REG16(addr) & ~(((1 << (width)) - 1) << (startbit))) | ((val) << (startbit))
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#define RMWREG8(addr, startbit, width, val) *REG8(addr) = (*REG8(addr) & ~(((1 << (width)) - 1) << (startbit))) | ((val) << (startbit))
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#define writel(v, a) (*REG32(a) = (v))
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#define readl(a) (*REG32(a))
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#define writeb(v, a) (*REG8(a) = (v))
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#define readb(a) (*REG8(a))
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#define writehw(v, a) (*REG16(a) = (v))
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#define readhw(a) (*REG16(a))
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#define writew(v, a) (*REG16(a) = (v))
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#define readw(a) (*REG16(a))
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#ifdef __cplusplus
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extern "C" {
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#endif
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#endif /* _REG_H_ */
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