42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
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/* the original core_cm3.h is nonfree by arm; this provides libopencm3 variant of the symbols efm32lib needs of CMSIS. */
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#include <stdint.h>
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/* needed by system_efm32.h:196, guessing */
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#define __INLINE inline
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/* needed around efm32tg840f32.h:229. comparing the efm32lib definitions to the
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* libopencm3 ones, "volatile" is all that's missing. */
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#define __IO volatile
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#define __O volatile
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#define __I volatile
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/* -> style access for what is defined in libopencm3/stm32/f1/scb.h /
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* cm3/memorymap.h, as it's needed by efm32lib/inc/efm32_emu.h */
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/* from stm32/f1/scb.h */
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#define SCB_SCR_SLEEPDEEP_Msk (1 << 2)
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/* structure as in, for example,
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* DeviceSupport/EnergyMicro/EFM32/efm32tg840f32.h, data from
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* libopencm3/stm32/f1/scb.h. incomplete. */
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typedef struct
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{
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__IO uint32_t CPUID;
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__IO uint32_t ICSR;
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__IO uint32_t VTOR;
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__IO uint32_t AIRCR;
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__IO uint32_t SCR;
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__IO uint32_t CCR;
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} SCB_TypeDef;
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#define SCB ((SCB_TypeDef *) SCB_BASE)
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/* from libopencm3/cm3/memorymap.h */
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#define PPBI_BASE 0xE0000000
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#define SCS_BASE (PPBI_BASE + 0xE000)
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#define SCB_BASE (SCS_BASE + 0x0D00)
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/* needed by efm32_emu.h, guessing and taking the implementation used in
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* lightswitch-interrupt.c */
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#define __WFI() __asm__("wfi")
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/* needed by efm32_cmu.h, probably it's just what gcc provides anyway */
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#define __CLZ(div) __builtin_clz(div)
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