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common: support inclusion into assembly files

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Suggested in https://github.com/libopencm3/libopencm3/pull/981
This commit is contained in:
Karl Palsson 2019-01-11 23:08:44 +00:00
parent 72e449f529
commit 4edba3111d
1 changed files with 23 additions and 5 deletions
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28
include/libopencm3/cm3/common.h
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@ -20,15 +20,16 @@
#ifndef LIBOPENCM3_CM3_COMMON_H
#define LIBOPENCM3_CM3_COMMON_H
#include <stdint.h>
#include <stdbool.h>
/* This must be placed around external function declaration for C++
* support. */
#ifdef __cplusplus
/* Declarations need wrapping for C++ */
# define BEGIN_DECLS extern "C" {
# define END_DECLS }
#elif defined(__ASSEMBLER__)
/* skipping for assembly */
#define BEGIN_DECLS .if 0
#define END_DECLS .endif
#else
/* And nothing for C */
# define BEGIN_DECLS
# define END_DECLS
#endif
@ -46,6 +47,22 @@
#endif
#if defined (__ASSEMBLER__)
#define MMIO8(addr) (addr)
#define MMIO16(addr) (addr)
#define MMIO32(addr) (addr)
#define MMIO64(addr) (addr)
#define BBIO_SRAM(addr, bit) \
(((addr) & 0x0FFFFF) * 32 + 0x22000000 + (bit) * 4)
#define BBIO_PERIPH(addr, bit) \
(((addr) & 0x0FFFFF) * 32 + 0x42000000 + (bit) * 4)
#else
#include <stdint.h>
#include <stdbool.h>
/* Generic memory-mapped I/O accessor functions */
#define MMIO8(addr) (*(volatile uint8_t *)(addr))
#define MMIO16(addr) (*(volatile uint16_t *)(addr))
@ -58,6 +75,7 @@
#define BBIO_PERIPH(addr, bit) \
MMIO32((((uint32_t)addr) & 0x0FFFFF) * 32 + 0x42000000 + (bit) * 4)
#endif
/* Generic bit definition */
#define BIT0 (1<<0)