25 lines
571 B
C
25 lines
571 B
C
/* mmio.h - access to MMIO registers */
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#ifndef MMIO_H
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#define MMIO_H
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#include <stdint.h>
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// write to MMIO register
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static GFXINLINE void mmio_write(uint32_t reg, uint32_t data) {
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uint32_t *ptr = (uint32_t*)reg;
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asm volatile("str %[data], [%[reg]]"
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: : [reg]"r"(ptr), [data]"r"(data));
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}
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// read from MMIO register
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static GFXINLINE uint32_t mmio_read(uint32_t reg) {
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uint32_t *ptr = (uint32_t*)reg;
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uint32_t data;
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asm volatile("ldr %[data], [%[reg]]"
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: [data]"=r"(data) : [reg]"r"(ptr));
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return data;
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}
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#endif // #ifndef MMIO_H
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