attr.h

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#ifndef CPU_ATTR_H
#define CPU_ATTR_H

#include "detect.h"

#include "cfg/cfg_proc.h"      /* CONFIG_KERN_PREEMPT */
#include "cfg/cfg_attr.h"      /* CONFIG_FAST_MEM */


#define CPU_BIG_ENDIAN    0x1234
#define CPU_LITTLE_ENDIAN 0x3412 /* Look twice, pal. This is not a bug. */
/*\}*/

#define CPU_HEADER(module)          PP_STRINGIZE(drv/PP_CAT3(module, _, CPU_ID).h)

#define CPU_CSOURCE(module)         PP_STRINGIZE(drv/PP_CAT3(module, _, CPU_ID).c)


#if CPU_I196

    #define NOP                     nop_instruction()

    #define CPU_REG_BITS            16
    #define CPU_REGS_CNT            16
    #define CPU_BYTE_ORDER          CPU_LITTLE_ENDIAN
    #define CPU_HARVARD             0

    #define CPU_RAM_START       0x100

#elif CPU_X86

    #define CPU_REGS_CNT            7
    #define CPU_BYTE_ORDER          CPU_LITTLE_ENDIAN
    #define CPU_HARVARD             0

    #if CPU_X86_64
        #define CPU_REG_BITS    64

        #ifdef __WIN64__
            /* WIN64 is an IL32-P64 weirdo. */
            #define SIZEOF_LONG  4
        #endif
    #else
        #define CPU_REG_BITS    32
    #endif

    #define CPU_RAM_START      0x1000

    #ifdef __GNUC__
        #define NOP         asm volatile ("nop")
        /* This is a good thing to insert into busy-wait loops. */
        #define PAUSE       asm volatile ("rep; nop" ::: "memory")
        #define BREAKPOINT  asm volatile ("int3" ::)
    #endif

#elif CPU_ARM

    #define CPU_REG_BITS           32
    #define CPU_REGS_CNT           16
    #define CPU_HARVARD            0

    #if CPU_ARM_AT91
        #define CPU_RAM_START       0x00200000
    #elif CPU_ARM_LPC2
        #define CPU_RAM_START       0x40000000
    #else
        #warning Fix CPU_RAM_START address for your ARM, default value set to 0x200
        #define CPU_RAM_START       0x200
    #endif

    #ifdef __IAR_SYSTEMS_ICC__
        #warning Check CPU_BYTE_ORDER
        #define CPU_BYTE_ORDER (__BIG_ENDIAN__ ? CPU_BIG_ENDIAN : CPU_LITTLE_ENDIAN)

        #define NOP            __no_operation()

    #else /* GCC and compatibles */

        #if defined(__ARMEB__)
            #define CPU_BYTE_ORDER CPU_BIG_ENDIAN
        #elif defined(__ARMEL__)
            #define CPU_BYTE_ORDER CPU_LITTLE_ENDIAN
        #else
            #error Unable to detect ARM endianness!
        #endif

        #define NOP            asm volatile ("mov r0,r0" ::)
        #define BREAKPOINT  /* asm("bkpt 0") DOES NOT WORK */

        #if CONFIG_FAST_MEM

            #define FAST_FUNC __attribute__((section(".ramfunc")))

            #define FAST_RODATA __attribute__((section(".data")))

        #else // !CONFIG_FAST_MEM
            #define FAST_RODATA 
            #define FAST_FUNC 
        #endif

        /*
         * Function attribute to move it into ram memory.
         */
        #define RAM_FUNC __attribute__((section(".ramfunc")))

    #endif /* !__IAR_SYSTEMS_ICC_ */
#elif CPU_CM3

    #define CPU_REG_BITS           32
    #define CPU_REGS_CNT           16
    #define CPU_HARVARD            0

    #if (CPU_CM3_LM3S1968 || CPU_CM3_LM3S8962 || CPU_CM3_STM32 || CPU_CM3_SAM3)
        #define CPU_RAM_START 0x20000000
    #else
        #warning Fix CPU_RAM_START address for your Cortex-M3, default value set to 0x20000000
        #define CPU_RAM_START 0x20000000
    #endif

    #if defined( __ICCARM__)
        #if ((defined __LITTLE_ENDIAN__) && (__LITTLE_ENDIAN__ == 0))
            #define CPU_BYTE_ORDER CPU_BIG_ENDIAN
        #elif ((defined __LITTLE_ENDIAN__) && (__LITTLE_ENDIAN__ == 1))
            #define CPU_BYTE_ORDER CPU_LITTLE_ENDIAN
        #else
            #error Unable to detect Cortex-M3 endianess!
        #endif

    #define NOP            __no_operation()
    #else
        #if defined(__ARMEB__) // GCC
            #define CPU_BYTE_ORDER CPU_BIG_ENDIAN
        #elif defined(__ARMEL__) // GCC
            #define CPU_BYTE_ORDER CPU_LITTLE_ENDIAN
        #else
            #error Unable to detect Cortex-M3 endianess!
        #endif

    #define NOP         asm volatile ("nop")
    #define PAUSE       asm volatile ("wfi" ::: "memory")
    #define BREAKPOINT  /* asm("bkpt 0") DOES NOT WORK */

    /*
     * Function attribute to move it into ram memory.
     */
    #define RAM_FUNC __attribute__((section(".ramfunc")))
    #endif

#elif CPU_PPC

    #define CPU_REG_BITS           (CPU_PPC32 ? 32 : 64)
    #define CPU_REGS_CNT           FIXME
    #define CPU_BYTE_ORDER         (__BIG_ENDIAN__ ? CPU_BIG_ENDIAN : CPU_LITTLE_ENDIAN)
    #define CPU_HARVARD            0

    #define CPU_RAM_START          0x1000

    #ifdef __GNUC__
        #define NOP         asm volatile ("nop" ::)
        #define BREAKPOINT  asm volatile ("twge 2,2" ::)
    #endif

#elif CPU_DSP56K

    #define CPU_REG_BITS            16
    #define CPU_REGS_CNT            FIXME
    #define CPU_BYTE_ORDER          CPU_BIG_ENDIAN
    #define CPU_HARVARD             1

    /* Memory is word-addessed in the DSP56K */
    #define CPU_BITS_PER_CHAR  16
    #define SIZEOF_SHORT        1
    #define SIZEOF_INT          1
    #define SIZEOF_LONG         2
    #define SIZEOF_PTR          1

    #define CPU_RAM_START       0x200

    #define NOP                     asm(nop)
    #define BREAKPOINT              asm(debug)

#elif CPU_AVR

    #define NOP                     asm volatile ("nop" ::)

    #define CPU_REG_BITS            8
    #define CPU_REGS_CNT           33 /* Includes SREG */
    #define CPU_BYTE_ORDER          CPU_LITTLE_ENDIAN
    #define CPU_HARVARD             1

    #if CPU_AVR_ATMEGA8 || CPU_AVR_ATMEGA32 || CPU_AVR_ATMEGA103
        #define CPU_RAM_START       0x60
    #elif CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA168 || CPU_AVR_ATMEGA328P
        #define CPU_RAM_START       0x100
    #elif CPU_AVR_ATMEGA1281 || CPU_AVR_ATMEGA1280 || CPU_AVR_ATMEGA2560
        #define CPU_RAM_START       0x200
    #elif CPU_AVR_XMEGA_D
        #define CPU_RAM_START       0x2000
    #else
        #warning Fix CPU_RAM_START address for your AVR, default value set to 0x100
        #define CPU_RAM_START       0x100
    #endif

#elif CPU_MSP430

    #define CPU_REG_BITS            16
    #define CPU_REGS_CNT            12
    #define CPU_BYTE_ORDER          CPU_LITTLE_ENDIAN
    #define CPU_HARVARD             0

    #define CPU_RAM_START           0x200

    #define NOP                     __asm__ __volatile__ ("nop")

#else
    #error No CPU_... defined.
#endif

#ifndef BREAKPOINT
#define BREAKPOINT /* nop */
#endif

#ifndef FAST_FUNC

    #define FAST_FUNC /* */
#endif

#ifndef FAST_RODATA

    #define FAST_RODATA /* */
#endif

#ifndef PAUSE

    #define PAUSE   do {NOP; MEMORY_BARRIER;} while (0)
#endif

#endif /* CPU_ATTR_H */